JPH10324219A - Gas generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air bag which can protect the driver or passenger of a car from collision irrespective of the type of collision. SOLUTION: An inside of a housing 1 is partitioned in the axial direction by a partitioning member 4 into two sealed gas generating chambers 2 and 3, which are equipped with ignition devices 7 and 8 for combustion of a gas generating agent 5. The ignition devices 7 and 8 are operated with a certain time difference so that the combustion of the gas generating agent 5 will take place with time difference in the two chambers 2 and 3, and an air bag is spread slowly by the gas only from one of the chambers 2 in the initial period of air bag spreading, and then is spread quickly by adding the gas generated from the other chamber 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas generator used for an airbag of an automobile, and more particularly, to a gas generator which enables deployment control of an airbag.

[0002]

2. Description of the Related Art A gas generator for inflating and deploying an airbag at a high speed in order to protect an occupant from an impact caused by a collision of an automobile is provided in an airbag module mounted in a steering wheel or an instrument panel. In the event of a collision, a high-pressure gas is rapidly generated by a signal from a collision sensor.

As an example of a gas generator for inflating and deploying an airbag, as shown in FIG. 8, a long cylindrical housing 100 in which a closed space A is formed by an outer cylinder 101 and a lid member 102 is shown. The gas generating agent 103 and the inner cylinder 104 are provided in
And a cylindrical filter 105 in order. The lid member 102 includes an ignition device 106 ignited by a collision detection signal from a collision sensor, a transfer agent 107 ignited by the ignition of the ignition device 106, Is arranged. In the gas generator, the igniter 106 is ignited by a collision detection signal from the collision sensor, and the flame causes
7 is ignited, and further, the flame of the transfer agent 107 is jetted into the inner cylinder 104 to ignite and burn the gas generating agent 103 to rapidly generate a large amount of high-temperature gas. A large amount of high-temperature gas rapidly generated in the housing 100 flows into the cylindrical filter 105 from a plurality of gas passage holes 104a of the inner cylinder 104,
Here, after cooling and slag collection, the gas is discharged from the plurality of gas discharge holes 101a of the outer cylinder 101 to the airbag, and the airbag is rapidly inflated and deployed.

[0004]

However, such a conventional gas generator has a structure in which a large amount of gas is released by a collision detection signal from a collision sensor, thereby rapidly inflating the airbag. Regardless of the type of collision (low-speed collision, high-speed collision, etc.), it always has a fixed deployment mode. Therefore, when the occupant is impacted by a rapidly deploying airbag, except when the occupant of the car is in the vicinity of the steering wheel or instrument panel, or in the case of a relatively gentle collision, etc. (Punching phenomenon), and even when the occupant suffers an obstacle, there is a problem that the original function of the airbag for protecting the occupant cannot be exhibited.

SUMMARY OF THE INVENTION The present invention has been made to solve this problem, and it is possible to control the deployment of an airbag in which the airbag is deployed slowly at an early stage of deployment and thereafter rapidly deployed. Another object of the present invention is to provide a gas generator capable of exerting an original function of an airbag.

[0006]

According to a first aspect of the present invention, there is provided a gas generator according to the present invention, wherein a plurality of sealed gas generating chambers are formed by enclosing a cylindrical housing having gas discharging holes. A gas generating agent housed in each of the gas generating chambers, and a gas generating agent disposed in each of the gas generating chambers between the gas generating agent and the housing. A filter that cools the high-temperature gas and collects the slag by burning the generating agent to release gas from the gas discharge holes to the outside, and a plurality of ignition devices that individually ignite the gas generating agent in each of the gas generating chambers. It is provided. This makes it possible to operate each of the ignition devices with a time lag, to provide a time lag for the combustion of the gas generating agent in each gas generating chamber, and to generate only one gas generating chamber in the initial stage of the airbag deployment. Deployed slowly by gas,
Thereafter, multi-stage deployment control for rapidly deploying the airbag by adding gas generated in another gas generation chamber can be performed.

[0007] As a detailed configuration of the gas generator, a long cylinder having a bottomed cylindrical outer cylinder having a gas discharge hole and a lid member abutted and pressed and joined so as to cover the open end of the outer cylinder. The interior of the housing is defined by a partition member in the axial direction as two sealed gas generation chambers, and each of the gas generation chambers is radially outward from the axis center of the housing. An ignition device that arranges a gas generating agent, an inner cylinder having a gas passage hole, and a cylindrical filter in this order, and ignites the gas generating agent in each of the gas generating chambers at a bottom portion and a cover member of the outer cylinder, respectively. Is arranged. Thus, the gas generator sequentially stores the gas generating agent, the inner cylinder and the filter from the opening of the outer cylinder toward the bottom side, and then press-fits the partition member to partition each gas generating chamber. , The gas generating agent, the inner cylinder and the filter are housed, and the lid member is abutted against the opening end of the outer cylinder and joined by press-fitting.

Further, as a detailed structure of another gas generator,
It has two bottomed cylindrical outer cylinders having gas discharge holes, and abutting the open ends of these outer cylinders to form a long tubular housing by press-fitting.
Two sealed gas generating chambers are defined in the axial direction by a partition member, and each of the gas generating chambers has a gas generating agent and a gas passage hole radially outward from the axis of the housing. In some cases, a cylinder and a cylindrical filter are arranged in this order, and an ignition device for igniting the gas generating agent in each of the gas generating chambers is provided at the bottom of each of the outer cylinders. This gas generator has a simple structure in which two outer cylinders containing a gas generating agent, an inner cylinder, and a filter are prepared, a partition member is interposed between the outer cylinders, the open ends of the outer cylinders are abutted to each other, and pressure welding is performed. Can be assembled by work.

Further, as a detailed configuration of another gas generator,
A long cylindrical housing is formed by a cylindrical outer cylinder having a gas discharge hole, and two lid members that are pressed and joined to each other so as to cover both open ends of the outer cylinder. The two gas generating chambers are defined in the axial direction by a partition member, and each of the gas generating chambers has a gas generating agent and a gas passage hole in a radially outward direction from the axial center of the housing. There is an apparatus in which an inner cylinder and a cylindrical filter are arranged in this order, and an ignition device for igniting the gas generating agent in each of the gas generating chambers is provided in each of the lid members. In this gas generator, an outer cylinder containing a gas generating agent, an inner cylinder, and a filter on both sides of a partition member is prepared, and each lid member is pressed against and joined to both open ends of the outer cylinder. It can be assembled with a simple structure and work.

[0010] Another configuration of the gas generator includes a cylindrical outer cylinder having a gas discharge hole, and two lid members inserted into both open ends of the outer cylinder, respectively. And a plurality of caulking projections projecting from both open ends of the outer cylinder in the axial direction of the housing are bent inward in a radial direction, and each lid member is fixed to the outer cylinder. This makes it possible to connect the outer cylinder and the cover member with a simple jig.

Further, as another detailed configuration, a filter seal member for closing a shaft end of the filter is disposed at least between one of the filters and the partition member. In a method to ensure the shut-off of the inflow and outflow of high-temperature gas in, and at least one between the gas generating agent of each of the gas generating chambers and the partition member, a cushion member having a heat insulating function is disposed, There is a method in which heat transfer between the gas generating chambers is cut off and powdering is prevented by vibration of the gas generating agent.

In addition, there is a method in which the partition member is constituted by abutting two flanged cap members, and the flange portion of each cap is fixed by being brought into contact with a burr formed by abutting pressure contact of each outer cylinder. is there. Thereby, each cap member is fixedly arranged while being urged to the bottom of each outer cylinder, and while absorbing the error of the press-contact amount at the time of press-contact, each gas-generating agent, the inner pipe and the filter are placed at the bottom of each outer pipe. It is possible to press it securely and evenly.

[0013] Further, there is also a device in which an elastic filler is interposed between each flanged cap member of the partition member. As a result, it is possible to prevent the deformation of each cap member by absorbing the impact force due to the combustion of the gas generating agent in each gas generating chamber, prevent the internal pressure fluctuation of the high temperature gas due to the combustion, and discharge the gas to the airbag at a stable pressure. It is also possible to do.

As a method of fixing the partition member and the housing, the partition member is deformed inwardly of the housing by a drawing process performed on the peripheral surface of the outer cylinder, and is projected radially inward by the drawing process. There is a method in which the outer cylinder is fixed at a caulked portion of the outer cylinder. When the partition member is deformed by drawing, the partition member can be fixed to the caulked portion of the outer cylinder by simple processing, and the adhesion between the partition member and the outer cylinder can be improved,
High-temperature gas flowing into and out of each gas generation chamber can be reliably shut off.

Further, as a configuration when the present invention is applied to a short cylindrical gas generator, a bottomed cylindrical lower lid and a gas discharge hole fitted so as to close an open end of the lower lid are provided. A short cylindrical housing is constituted by the bottomed cylindrical upper lid having the inside, and the inside of the housing is divided into two sealed gas generating chambers by a partition member in the radial direction, and each of the gas generating chambers is There is a type in which a gas generating agent and a filter are arranged so that the filter surrounds the gas generating agent, and an ignition device for igniting the gas generating agent in each of the gas generating chambers is arranged in the lower lid. . Accordingly, the gas generator of the present invention can be easily applied to an airbag device for a driver's seat.

[0016] It is preferable that the igniter comprises an igniter and a transfer agent, and the transfer agent is made of a nitrogen-containing organic compound having self-ignition property. As a result, in the event of a vehicle fire or a fire in a gas generator warehouse, self-ignition occurs quickly at a temperature lower than the deterioration temperature of the housing against high heat from multiple directions without ignition from the igniter, causing explosion and scattering of the housing. Danger can be prevented.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a gas generator according to the present invention will be described with reference to the drawings. The gas generator of the present invention
The interior of the housing is divided into a plurality of gas generating chambers, and the gas generating agent accommodated in each gas generating chamber can be ignited by an ignition device arranged in each gas generating chamber, thereby deploying the airbag. The form can be controlled, for example,
By igniting with a time difference, the airbag for the passenger seat or driver's seat has a multi-stage output characteristic such that it can be slowly deployed with a small amount of gas in the early stage of deployment, and then rapidly deployed by the subsequent addition of gas. It is a thing. Hereinafter, a gas generator used for a passenger airbag and a gas generator used for a driver airbag will be described with reference to FIGS. 1 to 7.

First, a specific structure of the gas generators X1 to X4 used in the passenger airbag shown in FIGS. 1 to 4 will be described.

The gas generator X1 of the passenger airbag shown in FIG. 1 includes a long cylindrical housing 1, a partition member 4 for defining the inside of the housing 1 into two gas generating chambers 2, 3, and Gas generating agent 5 housed in gas generating chambers 2 and 3, inner cylinder 1
2 and a filter 6, and ignition devices 7 and 8 for burning the gas generating agents 5 in the gas generating chambers 2 and 3, respectively. The housing 1 includes a bottomed outer cylinder 9 having one end opened,
An annular rib 10a formed on the outer peripheral end of the lid member 10;
And the opening end of the outer cylinder 9 are joined to each other by friction pressure welding to form a closed space A. A projection 9c is formed on the outer cylinder 9 so as to protrude inward from the bottom 9b. A front passenger seat airbag (hereinafter simply referred to as "airbag") extends along the axial direction of the housing 1 on the body peripheral surface. Are formed. Each gas discharge hole 9a is closed by a thin cylindrical burst plate 11 adhered to the inner periphery of the outer cylinder 9, and the burst plate 11 plays a role of preventing moisture in the closed space A and adjusting an internal pressure during combustion. To fulfill.

The closed space A of the housing 1 is
To define two sealed gas generating chambers 2 and 3. The partition member 4 is located inside the outer cylinder 1 and divides the sealed space A into two parts in the axial direction of the housing 1 to define the gas generating chambers 2 and 3 and is in contact with the inner peripheral surface of the inner cylinder 12. It is composed of a central disk portion 4a and a flange portion 4b which is in contact with the inner surface of the outer cylinder 9 at the outer peripheral portion of the disk portion 4a. Each of the gas generating chambers 2 and 3 partitioned by the partition member 4 has a housing 1.
Gas generating agent 5 and inner cylinder 12 from the axis center of
And the order of the cylindrical filters 6 are stored respectively.

Each filter 6 is fitted together with the inner cylinder 12 into the projection 9c of the outer cylinder 9 or the projection 10b of the lid member 10, and sandwiches the flange 4b at the end extending to the partition member 4. . An annular filter seal member 13 is provided between the filter 6 of the gas generation chamber 2 and the flange portion 4b of the partition member 4.
Is inserted into the outer cylinder 9 in a pressed state so as to close the shaft end of the filter 6, and the filter seal member 13 is used for inflow and outflow of high-temperature gas due to the combustion of the gas generating agent 5 between the filters 6. It has the function of shutting off. As the filter seal member 13, it is preferable to use an elastic material such as silicone rubber or silicone foam. Each inner cylinder 12 has a partition member 4
The end extending in the direction is press-fitted into the disk portion 4a, and a plurality of gas passage holes 1 communicating with each filter 6 are formed in the body peripheral surface.
2a is open. Each gas passage hole 12a is formed in each inner cylinder 12 in a state where the axis a in the cross section of the housing 1 is orthogonal to the axis b in the cross section of each gas discharge hole 9a. ing. Between the gas generating agent 5 and the partition member 4 on the gas generating chamber 2 side, a cushion member 14 that is in contact with the disk portion 4a is disposed.
Has a function of a heat insulating material that blocks heat transfer between the gas generating chambers 2 and 3 while preventing powdering due to vibration of the gas generating agent 5. Therefore, as the cushion member 14, it is preferable to use an elastic material having a heat insulating function such as a ceramic fiber.

The ignition devices 7 and 8 are composed of a transfer agent 15 and an ignition device 1.
6 are disposed on both the projection 9c of the outer cylinder 9 and the projection 10b of the lid member 10, respectively. The transfer agent 15 of the ignition device 7 is accommodated in a flanged cap member 17 fitted into the projection 9c, and the projection 9c has a gap h.
And facing the igniter 16. The flanged cap member 17 is inserted into the inner cylinder 12, and is formed with a through hole 17 a through which the ignition flame of the transfer agent 15 is jetted into the inner cylinder 12 of the gas generation chamber 2. The ignition device 16 of the ignition device 7 includes:
It is caulked and fixed to the projection 9c with a gap h from the transfer agent 15. The transfer agent 15 of the ignition device 8 is
The projection 10b is housed in the flanged cap member 18 fitted into the igniter 16b, and faces the igniter 16 with a gap h between the projections 10b. Flange 18b of flanged cap member 18
Extends to an annular filter seal member 19 that closes the end of the filter 6, and the tip 18 a contacts and is fixed to a burr 9 d of the outer cylinder 9 formed when the outer cylinder 9 is pressed against the lid member 10. I have. The protruding side of the cap member 18 is the inner cylinder 1
2, a through hole 18 c for discharging the ignition flame of the transfer agent 15 into the inner cylinder 12 of the gas generating chamber 3 is formed. The igniter 16 of the igniter 8 is provided between the transfer agent 15 and the gap h.
Is fixed by caulking to the convex portion 10b.

The transfer agent 15 used in each of the ignition devices 7 and 8
It is preferable to use a transfer agent that uses a nitrogen-containing organic compound having self-ignitability as a fuel. Examples of the self-igniting explosive composition of the nitrogen-containing organic compound type include PC
As described in detail in T application No. JP96 / 3493, a tetrazole-based organic compound, an oxidizing agent containing a nitrate as a main component, Zr, Hf, Mo, W, Mn, Ni, F
It is preferable to add a binder to a mixture containing a simple substance of metal or a combustion modifier consisting of an oxidizing agent or a sulfide, and form the mixture into granules. If such a self-igniting explosive composition is used as the transfer agent 15, the transfer agent self-ignites at a temperature lower than the thermal deterioration temperature of the gas generator housing (usually aluminum) in a vehicle fire or a warehouse fire. It is possible to prevent the damage due to the rupture of the steel.

Next, the operation of the gas generator X1 for inflating and deploying the passenger airbag will be described. When the collision sensor detects a collision of the vehicle, one of the ignition devices 7 is operated, and thereafter, the other ignition device 8 is operated with a predetermined time difference. First, when one of the ignition devices 7 is operated, the transfer agent 15 is ignited, and a flame is ejected from the through hole 17a of the cap member 17 into the inner cylinder 12 of the gas generation chamber 2, and the flame causes the gas generation agent 5 to be ignited. Are ignited and burn to generate hot gas. The high-temperature gas generated in the gas generation chamber 2 passes through the gas passage holes 12 a of the inner cylinder 12 in a state where heat transfer to the adjacent gas generation chamber 3 is cut off via the heat insulating material of the cushion member 14. Flows into the filter 6,
The slag is collected and cooled by passing the filter 6 substantially uniformly over the entire circumference in the longitudinal direction, and the burst plate 11 is broken by the increase in the internal pressure of the gas generation chamber 2 and is discharged from each gas discharge hole 9a to the airbag. You. At this time, the high-temperature gas flowing into the filter 6 is prevented from flowing into the adjacent gas generating chamber 3 by the filter sealing member 13, and without burning the gas generating agent 5 in the adjacent gas generating chamber 3, The gas is discharged from the gas discharge hole 9a to the airbag. When the gas that has been cleaned and cooled in the gas generating chamber 2 is released, the airbag is slowly expanded and deployed by the gas generated only in the gas generating chamber 2 in the initial stage of deployment.

After the high-temperature gas is generated in the gas generating chamber 2, when the other ignition device 8 is activated with a small time difference, the transfer agent 15 is ignited, and a flame is generated in the gas generating chamber 3 from the through hole 18 c of the cap member 18. The gas is ejected into the cylinder 12, and the gas generating agent 5 is burned by the flame to generate a high-temperature gas. The high-temperature gas generated in the gas generating chamber 3 is supplied to each gas passage hole 1 of the inner cylinder 12.
2a, the slag is collected and cooled by flowing into the filter 6 and passing substantially uniformly over the entire circumference of the filter 6 in the longitudinal direction.
Burst plate 11 due to increase in internal pressure of gas generating chamber 3
Is released to the airbag with a time delay from the gas release of the gas generating chamber 2 from each gas release hole 9a. The airbag is slowly deployed by the gas generated only in the gas generating chamber 2 in the initial stage of deployment, and then rapidly expanded and deployed by the gas generated in the gas generating chambers 2 and 3.

As described above, according to the gas generator X1, the ignition devices 7 and 8 are activated with a time lag, so that the deployment of the airbag can be performed in a relatively small amount generated only in the gas generation chamber 2 in the initial stage. After the gas is slowly developed, the deployment control (the amount of gas released into the airbag is controlled in two stages) is performed in which the gas is rapidly developed by a large amount of gas generated in the gas generation chambers 2 and 3. Therefore, even if the passenger on the passenger seat is sitting near the instrument panel,
The original function of the airbag can be safely exhibited without receiving the impact of the initial deployment of the airbag.

To assemble the gas generator X1, the filter 6, the inner cylinder 12, the gas generating agent 5 and the like are sequentially stored from the bottom 9b side of the outer cylinder 10, and then the partition member 4 is press-fitted to each gas generating chamber 2. After partitioning into filters 3 and 3, filters 6 and 12
The gas generating agent 5 and the like are sequentially housed, and then the cover member 10 can be assembled with a simple structure and operation in which the lid member 10 is butted against the outer cylinder 9 and joined by friction welding, thereby reducing the manufacturing cost.

If a filter seal member 13 is inserted between the filter 6 of the gas generating chamber 2 and the flange portion 4b of the partition member 4, the flow of high-temperature gas between the filters 6 can be shut off. The high-temperature gas generated by the combustion of the gas generating agent 5 in the gas generating chamber 2 does not affect the gas generating agent 5 in the other gas generating chamber 3 (without causing ignition). 5 can be burned with a time lag, and the two-stage deployment control of the airbag can be ensured. Further, if an annular filter seal member 13 is inserted between the filter 6 of the other gas generating chamber 3 and the flange portion 4b of the partition member 4, the flow of the high-temperature gas can be more reliably blocked.

Further, when a cushion member 14 having a heat insulating function is disposed between the gas generating agent 5 in the gas generating chamber 2 and the partition member 4, heat transfer of the gas generating agent 5 burned in the inner cylinder 12 is reduced by the cushion. It is cut off by the heat insulating function of the member 14 and does not affect the gas generating agent 5 in the adjacent gas generating chamber 3 (it does not burn). When the cushion member 14 is also arranged between the gas generating agent 5 and the partition member 4 in the other gas generating chamber 3, the heat transfer between the gas generating chambers 2 and 3 is more reliably blocked, and the airbag is deployed. Of the two-stage deployment control can be improved.

The tip 18a of the flanged cap member 18
Is in contact with the burr 9 d of the outer cylinder 9 formed at the time of pressing, so that the flanged cap member 18 is attached to the bottom 9 b of the outer cylinder 9.
The gas generating agent 5, the inner cylinder 12, the filter 6
In addition, the partition member 4 can be reliably and uniformly pressed toward the bottom 9b of the outer cylinder 9. Furthermore, since the flanged cap member 18 is attached with a gap h secured between the transfer agent 15 and the protruding portion 10b, even if the temperature of the lid member 10 rises during pressure welding, the heat is transferred to the transfer agent. Because it is not directly transmitted to 15,
By avoiding erroneous ignition of the transfer agent 15, the gas generator X1 can be safely protected.
Can be assembled.

Next, a gas generator X2 shown in FIG. 2 has a housing 51 formed by joining two outer cylinders 9 by abutting and friction-welding. The same members as those in FIG. It is shown and the description is omitted.

In FIG. 2, the housing 51 of the gas generator X2 is composed of two bottomed outer cylinders 59 each having an open end, and the outer ends of the outer cylinders 59 are joined by friction welding. The structure forms a closed space A. The closed space A of the housing 51 is defined by the partition member 54 into two sealed gas generating chambers 2 and 3. The partition member 54 is located at the friction pressure contact portion of each outer cylinder 59 and divides the sealed space A into two to define the gas generating chambers 2 and 3. Is formed by inserting a filler 56 (silicon rubber or the like). Each cap member 55 is connected to the bottom 59 of each outer cylinder 59.
b, and a flange 55b extending from around the outer periphery of the protrusion 55a to the inner periphery of the outer cylinder 59. The tip 55c is formed when the outer cylinders 59 are pressed against each other. And is fixed in contact with the burr 59d. Then, in each outer cylinder 59 (each gas generating chamber 2, 3) partitioned by the partition member 54, the gas generating agent 5, the inner cylinder 12, and the filter 6 are sequentially housed from the axis center of the housing 51 to the outside radially. Have been.

Each filter 6 is, together with the inner cylinder 12, each outer cylinder 5
The projections 59c of the first and second cap members 55 are fitted into the projections 59c of the respective cap members 55. An annular filter seal member 13 is provided between each filter 6 and the flange 55 b of the partition member 54.
Each filter seal member 13 intercepts the flow of high-temperature gas due to the combustion of the gas generating agent 5 between the filters 6 so as to close the shaft end of the filter. doing. The end of each inner cylinder 12 extending to the partition member 54 is inserted into the projection 55a of each cap member 55, and the inner cylinder 12 is provided between the gas generation chambers 2 and 3 and the partition member 54 so as to contact the projection 55a. A cushion member 14 is in contact therewith. The cushion member 14 prevents powdering due to the vibration of the gas generating agent 5 and interrupts heat transfer between the gas generating chambers 2 and 3.

The igniters 7 and 8 are connected to the projections 5 of each outer cylinder 59.
9c. Each of the transfer agents 15 is housed in the cap member 17 fitted into each of the protrusions 59c, and faces the protrusion 59c with a gap h therebetween. Each projection 59c
Is fixed by swaging.

As described above, according to the gas generator X2, by operating the ignition devices 7 and 8 with a time lag, the deployment of the airbag can be controlled in two stages as described with reference to FIG. Therefore, even in a low-speed collision or when the occupant in the front passenger seat is not properly seated, the original function of the airbag can be safely performed without being subjected to an impact due to the initial deployment of the airbag.

In assembling the gas generator X2, two outer cylinders 59 containing the filter 6, the inner cylinder 12, the gas generating agent 5 and the like are prepared, and a partition member 54 is interposed between the outer cylinders 59. Can be assembled in a simple procedure of joining the ends by opening the ends with each other and friction-welding, thereby reducing the manufacturing cost.

Further, since the tip 55c of each cap member 55 of the partition member 54 is in contact with the burr 59d formed at the time of pressing, each cap member 55 is fixedly arranged while being urged toward each protrusion 59c. Thus, the gas generating agent 5, the inner cylinder 12, and the filter 6 can be reliably and evenly pressed toward the protrusion 59c of each outer cylinder 59 while absorbing the error of the pressure contact amount at the time of pressing. Further, when an elastic filler 56 is inserted between the cap members 55, the gas generating chambers 2,
The deformation of each cap member 55 can be prevented by absorbing the pressure generated by the combustion of the third gas generating agent 5, and the gas can be discharged to the airbag at a stable pressure without changing the internal pressure of the high-temperature gas due to the combustion.

Each filter 6 and the flange 5 of the partition member 54
5b, a filter seal member 13 is interposed, and a cushion member 14 is disposed between the gas generating agent 5 of each gas generating chamber 2 and 3 and the partition member 54.
Can shut off the flow of the hot gas between the gas generating chambers 2 and 3 and can shut off the heat transfer between the adjacent gas generating chambers 2 and 3, so that the hot gas generated by the combustion of the gas generating agent 5 in one gas generating chamber 2 The gas generating agent 5 in each of the gas generating chambers 2 and 3 can be burned with a time lag without affecting the gas generating agent 5 in the gas generating chamber 3 (without burning). The step control can be ensured.

Next, the gas generator X3 shown in FIG. 3 has a housing 61 formed by joining the lid members 10 to both ends of the outer cylinder 69 by friction contact with each other. The members are denoted by the same reference numerals, and detailed description is omitted.

In FIG. 3, the housing 61 of the gas generator X3 is composed of an outer cylinder 69 having both ends opened, and two lid members 10 covering both ends of the outer cylinder 69. The closed space A is formed by abutting the annular rib 10a and the two open ends of the outer cylinder 69 and joining them by friction welding. The sealed space A of the housing 61 is defined by the partition member 4 into two sealed gas generating chambers 2 and 3. The partition member 4 is defined in each of the gas chambers 2 and 3 which are disposed in the outer cylinder 69 and divided into two, and are drawn around the outer periphery of a central portion of the outer cylinder 69 (reducing the inner diameter of the outer cylinder 69). The outer cylinder 69 protrudes radially inward to form a caulked portion 69e and is fixed (caulked and fixed). Each of the outer cylinders 69 (each of the gas generating chambers 2 and 3) partitioned by the partition member 4 contains the gas generating agent 5, the inner cylinder 12, and the filter 6 in a radially outward direction from the axis of the housing 61. ing.

Each filter 6 is fitted together with the inner cylinder 12 into the convex portion 10b of each lid member 10, and the flange portion 4b is sandwiched by the shaft end extending to the partition member 4. An annular filter seal member 13 is provided between each of the filters 6 and the flange portion 4b so as to close the axial end of each of the filters 6.
Each filter seal member 13 is interposed between the filters 6 in a pressed state, and blocks outflow and inflow of high-temperature gas due to combustion of the gas generating agent 5 between the filters 6. Each inner cylinder 12
An end extending to the partition member 4 is inserted into the disk portion 4a, and a cushion member 14 abutting on the disk portion 4a is provided between the gas generating agent 5 of each of the gas generating chambers 2 and 3 and the partition member 4. Is arranged. The cushion member 14 cuts off the powder generated by the vibration of the gas generating agent 5 and the heat transfer between the gas generating chambers 2 and 3.

The igniters 7 and 8 are provided with the projections 1 of each lid member 10.
0c. Each transfer agent 15 is provided on each convex portion 1.
The igniter 16 is housed in the flanged cap member 18 fitted into the igniter 16 with a gap h between the projections 10c. The flange 18b of the cap member 18 extends to the axial end of the filter 6, and the tip 18a of the flange 18b of the outer cylinder 69 formed when the outer cylinder 69 is pressed into contact with each lid member 10d.
Abuts and is fixed. Each igniter 16 has a transfer agent 15
And the projection 10c is caulked with a gap h therebetween.

As described above, according to the gas generator X3, the deployment of the airbag can be controlled in two stages in the same manner as described with reference to FIG. become.

The gas generator X3 is assembled by caulking and fixing the partition member 4 and then holding the filter 6, the inner cylinder 12 and the gas generating agent 5 on the outer cylinder 6 on both sides of the partition member 4 as a boundary.
9 can be prepared and assembled by a simple operation in which both open ends of the outer cylinders 69 are abutted against the respective lid members 10 and joined by friction welding.

Further, by drawing the outer cylinder 69, the partition member 4 can be fixed to the outer cylinder 69 with a simple process by crimping.
Since the close contact between the partition member 4 and the outer cylinder 69 can be improved, the inflow and outflow of high-temperature gas into and from the gas generating chambers 2 and 3 can be reliably shut off. Furthermore, each filter 6 and the flange portion 4b of the partition member 4
The filter seal member 13 is interposed between the gas generating chambers 2 and 3, and the cushion member 14 is disposed between the gas generating agent 5 and the partition member 4 of each of the gas generating chambers 2 and 3. Since the inflow and outflow of the high-temperature gas between the gas generating chambers 2 and 3 can be blocked, and the mutual heat transfer between the adjacent gas generating chambers 2 and 3 can be blocked, the high-temperature gas generated by the combustion of the gas generating agent 5 in one of the gas generating chambers 2 reduces Each gas generating agent 5 in each of the gas generating chambers 2 and 3 can be burned at a predetermined time difference without affecting the gas generating agent 5 in the gas generating chamber 3 (without burning). The two-stage control of deployment can be performed reliably.

The distal end 18 of each of the flanged cap members 18
Since a is in contact with the burr 69d of the outer cylinder 69 formed at the time of pressing, each flanged cap member 18 is fixedly arranged while being urged by the partition member 4, and the error of the pressing amount at the time of pressing is determined. While absorbing, gas generating agent 5, inner cylinder 12, filter 6
Can be reliably and uniformly suppressed toward the partition member 4. Further, each flanged cap member 18 is provided with a transfer agent 1.
Since the gap h is secured between the protruding portion 5 and the convex portion 10b, even if the temperature of each of the lid members 10 rises during pressing, the heat is not directly transmitted to the transfer agent 15, so that the Gunpowder 15
And the gas generator X3 can be safely assembled.

Next, the gas generator X4 shown in FIG. 4 has a housing 71 which is formed by fitting the lid members 10 at both ends of the outer cylinder 69 and caulking. The same members as those in FIG. The detailed description is omitted.

In FIG. 4, the housing 71 of the gas generator X4 is composed of an outer cylinder 69 having both open ends and two lid members 10 covering both open ends of the outer cylinder 69. Are inserted from both open ends of the outer cylinder 69 to form the outer cylinder 6.
The closed space A is formed by bending a plurality of caulking projections 72a projecting from both ends of the housing 9 in the axial direction of the housing 71 radially inward. The sealed space A of the housing 71 is defined by the partition member 4 into two sealed gas generating chambers 2 and 3. The partition member 4 includes an outer cylinder 69
The inside is divided into two, and the gas generation chambers 2 and 3 are defined, and the outer cylinder 69 is moved radially inward by drawing processing (processing to reduce the inner diameter of the outer cylinder 69) performed on the outer cylinder 69. A caulked portion 69e is formed to protrude and is fixed. The outer cylinder 69 (each gas generating chamber 2 and 3) partitioned by the partition member 4 contains the gas generating agent 5, the inner cylinder 12, and the filter 6 in a radially outward direction from the axis center of the housing 71. ing.

The other configuration is the same as that of FIG.
Although detailed description is omitted, in the gas generator X4,
By operating the ignition devices 7 and 8 with a time lag, the deployment of the airbag is reduced by two in the same manner as described with reference to FIG.
It is possible to control in stages.

In assembling the gas generator X4,
After caulking and fixing the partition member 4, an outer cylinder 69 containing the filter 6, the inner cylinder 12, the gas generating agent 15, and the like on both sides of the partition member 4 is prepared. Since the crimping projections 72a are bent and fixed by crimping by fitting the member 10, it is possible to assemble them by a simple operation without friction welding, and a reduction in manufacturing cost can be expected.

Next, a case where the present invention is applied to an airbag device for a driver's seat will be described in detail with reference to FIGS.

The gas generator Y for the driver's seat airbag shown in FIGS. 5 and 6 comprises a short cylindrical housing 81, a partition member 84 for partitioning the housing 81 into two gas generating chambers 82 and 83, A gas generating agent 85 and a filter 86 stored in the gas generating chambers 82 and 83;
Ignition devices 87 and 8 for burning the respective gas generating agents 85
8 is provided.

The housing 81 has a structure in which the upper lid 89 is fitted into the lower lid 90 and joined by welding to form a closed space A. The upper lid 89 of the housing 81 has a cylindrical shape with a lid comprising a cylindrical portion 89b and an upper plate portion 89c for closing one end of the cylindrical portion 89b. The material may be stainless steel, aluminum, or the like. Therefore, a thin steel plate such as stainless steel can be integrally formed by press working. A plurality of gas discharge holes 89 a communicating with the driver's seat airbag are formed in the cylindrical portion 89 b of the upper lid 89 over the circumferential direction of the housing 81. Each gas discharge hole 8
9a is closed by a thin tubular burst plate 91 adhered to the inner periphery of the tubular portion 89b, and the burst plate 91 plays a role in preventing moisture in the housing 81 and adjusting the internal pressure during combustion. Things. The lower lid 90 includes a lower plate portion 90b that closes one end of the cylindrical portion 90a,
It has a bottomed cylindrical shape including a flange portion 90c that protrudes radially outward from the opening end of “a”, and can be integrally formed by pressing a thin steel plate such as stainless steel in order to reduce manufacturing costs. A groove portion 92 is formed in the lower plate portion 90b of the lower lid 90. The groove portion 92 passes through the center of the shaft so as to divide the lower plate portion 90b into two equal parts, for example.
a extends between the inner circumferences. Further, each of the equally divided portions of the lower plate portion 90b has a through hole 93 communicating with the inside and outside of the sealed space A.
Are formed respectively.

The housing 81 is inserted from the opening end of the upper lid 89 so as to cover the lower lid 90, and the cylindrical portion 89b of the upper lid 89 is inserted.
After the front end is abutted against the lower plate portion 90b of the lower cover 90, the outer periphery of the upper cover 89 and the flange portion 90c of the lower cover 90 are welded to form a closed space A. The enclosed space A of the housing 81 is
Two closed gas generating chambers 82 and 83 are defined. The partition member 84 is inserted across the groove 92 of the lower lid 90 and defines gas generation chambers 82 and 83 that divide the sealed space A into two in the radial direction of the housing 81. Housing 81
Are welded at the upper plate 89c of the upper lid 89 and the groove 93 of the lower lid 90. A gas generating agent 85 is loaded in the center of each of the gas generating chambers 82 and 83 defined by the partition member 84, and a filter 86 is arranged so as to surround the gas generating agent 85.

Each filter 86 is a cylindrical body having a semicircular cross section, and forms an annular gas passage space B between itself and the inner periphery of the cylindrical portion 89b of the upper lid 89 while forming a lower plate portion of the lower lid 90. The upper lid 89 is placed on the upper cover 90c and extends until it comes into contact with the upper plate 89c of the upper lid 89. In each filter 86, a gas generating agent 85 is provided.
At the same time, a cushion member 94 is arranged. The cushion member 94 is for preventing vibration of the gas generating agent 85 formed in, for example, a tablet shape, and is used for the upper plate 8 of the upper lid 89.
9c.

Each of the igniters 87 and 88 comprises a transfer agent 95 and an igniter 96, and a holder 97 protruding from each through hole 93.
Are arranged in each. Each transfer agent 95 is accommodated in a cap member 98 fitted in a holder 97, and faces the holder 97 with a gap h therebetween. The cap member 98 is provided with the ignition flame of the transfer agent 95 in each of the gas generating chambers 82 and 8.
3 is formed with a through hole 98a to be spouted. Each igniter 96 is hermetically fixed to the holder 97 of each through hole 93 with a seal ring 97a interposed therebetween so as to separate the gap h from the transfer agent 95. As the transfer agent 95 used in each of the ignition devices 87 and 88, it is preferable to use the explosive composition using the above-mentioned self-igniting nitrogen-containing organic compound as a fuel.

Next, the operation of the gas generator Y will be described. When the collision sensor detects a vehicle collision,
One ignition device 87 is operated, and the other ignition device 88 is operated after a predetermined time difference. One ignition device 87
When the igniter 96 is activated, the transfer agent 95 is ignited, and a flame is ejected from the through hole 98a of the cap member 98 into the gas generating chamber 82, and the gas generating agent 85 is burned by this flame to generate a high-temperature gas. . The high-temperature gas generated in the gas generation chamber 82 flows into the filter 86, passes through the filter 86, collects and cools slag, and the internal pressure of the gas generation chamber 82 increases, so that the burst plate 91 is broken. Hole 89
a to the airbag. And the gas generation chamber 8
When the cleaned and cooled gas 2 is released, the airbag is gently inflated and deployed by the gas generated only in the gas generating chamber 82 in the initial stage of deployment.

Next, when the igniter 96 of the other igniter 88 is actuated a short time after the generation of the high-temperature gas in the gas generating chamber 82, the igniter 95 ignites the transfer agent 95 and the through hole 9 of the cap member 98.
From 8a, a flame is blown into the gas generating chamber 83, and the gas generating agent 85 is burned by this flame to generate a high-temperature gas. The high-temperature gas generated in the gas generation chamber 83 flows into the filter 86, passes through the filter 86, collects and cools slag, and the gas whose burst plate 91 is broken by the increase in the internal pressure of the gas generation chamber 83. The gas generating chamber 8 is formed through the discharge hole 89a.
The gas is discharged to the airbag in a state of being delayed in time from the gas release of No. 2. Then, the airbag is gently inflated by a small amount of gas generated only in the gas generation chamber 82 at the initial stage of deployment, and then rapidly expanded and deployed by a large amount of gas generated in both the gas generation chambers 82 and 83.

As described above, according to the gas generator Y, by operating the ignition devices 87 and 88 with a time lag, the deployment of the airbag is gradually performed by the gas generated only in the gas generation chamber 82 in the initial stage. It is possible to perform the deployment control for performing the deployment and then the rapid deployment by the gas generated in the gas generating chambers 82 and 83 (the amount of gas released to the airbag is performed in two stages). An effective operation of the airbag is enabled.

The partition member 84 is connected to the lower plate 90 of the lower cover 90.
b, as shown in FIG.
b, a long hole 99 extending in the diameter direction of the inner cylindrical portion 89b is formed, and the partition member 84 is inserted from the long hole 99,
The projecting portion of the partition member 84 and the back surface of the lower plate portion 90b may be joined by welding. In the above example, the partition member 84 is used.
Has shown the case where it is defined in two sealed gas generating chambers 82 and 83, however, the present invention is not limited to this. By changing the shape of the partition member 84, it is possible to define three or more gas generating chambers. By arranging the ignition device in each of the gas generating chambers, the airbag deployment can be controlled in multiple stages. Further, an example has been shown in which the upper cover 89 and the lower cover 90 are both pressed and formed, and the partition member 84 is welded thereto, but the present invention is not limited to this.
The gas generator Y having the same function can be obtained by integrally forming the partition member 84 and the partition member 84 by forging aluminum, and also forming the lower lid by forging aluminum.

[0061]

As described above in detail, according to the gas generator of the present invention, the inside of the gas generator is divided into a plurality of independent gas generating chambers, and the gas generating agent is provided in each gas generating chamber. , The filter and the ignition device are arranged, so that a plurality of gas generators are housed in one gas generator. Therefore, by operating the ignition device of each gas generation chamber with a time difference, it is possible to cause the gas generation from each gas generation chamber with a time difference, so that the gas is generated only in one gas generation chamber. After the airbag is slowly deployed with a small amount of gas, multi-stage deployment control that allows rapid deployment with a large amount of gas together with the gas generated in other gas generation chambers is possible, which occurs during low-speed collision or irregular seating Injuries to the human body due to the impact of the airbag in the initial stage of deployment can be reduced, and the original function of protecting the occupant can be exhibited regardless of the collision required for the airbag.

Further, the outer cylinder of the gas generator is formed as a long cylinder with a bottom, and the filter, the inner cylinder and the gas generating agent are stored from the open end, and then the partition member is press-fitted, so that the first gas is first formed. After a generation chamber is formed, and a filter, an inner cylinder and a gas generating agent are similarly stored from the open end to form a second gas generation chamber, a lid member is abutted against the open end of the outer cylinder to press-contact. If the joining structure is adopted, it is possible to easily manufacture a gas generator having two gas generating chambers by inserting a constituent member from only one end, and also to assemble a member from only one end. In addition, the automation of the assembling process is facilitated, and an increase in manufacturing cost can be suppressed.
At the same time, the volumes of the two gas generating chambers can be arbitrarily changed depending on the press-fit position of the partition member.

Further, two outer cylinders each containing the gas generating agent, the inner cylinder, the filter and the ignition device and having one end opened are prepared.
By adopting a structure in which a partition member is interposed between the two outer cylinders and the opening ends are pressure-welded, not only a gas generator having two gas generating chambers can be manufactured by a simple operation, but also an arbitrary volume of the outer cylinder can be obtained. Depending on the combination, the capacity of the two gas generating chambers can be arbitrarily selected.

If a structure is adopted in which a partition member is first inserted and arranged in the outer cylinder having both ends opened and then caulked and fixed from the outer peripheral portion of the outer cylinder, a strong connection between the partition member and the outer cylinder can be obtained. Then, the inflow of the combustion gas from one gas generation chamber to the other gas generation chamber can be completely prevented, so that a gas generator having stable performance can be obtained.

By interposing a filter seal member between the filter and the partition member, it is possible to more reliably prevent the inflow and outflow of the combustion gas between the gas generation chambers, and to maintain the intended combustion order.

Further, by disposing a cushion member having a heat insulating function between the partition member and the gas generating agent, heat transfer to the adjacent gas generation chamber via the partition member is prevented, and gas generation is prevented. Powdering due to vibration of the agent is prevented, and the performance of the gas generator can be stably maintained for a long period of time.

Further, since the flange of the cap member holding the ignition device is fixed by being brought into contact with the burrs at the time of pressing, each cap member is fixed while being urged to the bottom of each outer cylinder. The gas generating agent, the inner cylinder, and the filter can be reliably and evenly pressed toward the bottom of each outer cylinder while absorbing an error of the pressure contact amount at the time of the pressure contact.

Further, if an elastic filler is inserted into the partition member, the strong pressure generated when the gas generating agent in each gas generating chamber is burned can be absorbed to prevent the deformation of the partition member, and the high temperature caused by the combustion can be prevented. It is possible to perform stable combustion without changing the internal pressure of the gas.

Further, if the outer cylinder and the lid members arranged at both ends of the outer cylinder are fixed by caulking by bending the caulking projections formed at both ends of the outer cylinder, press-welding is required. It is possible to assemble the housing with a simple operation without any trouble.

By applying the present invention to the gas generator of the driver's seat airbag device having a short cylindrical shape, it is possible to control the multistage deployment of the airbag also in the driver's airbag device. Become.

Further, by using a self-igniting explosive composition using a nitrogen-containing organic compound as a fuel as a transfer agent, explosion and scattering of the gas generator housing due to a vehicle fire or a fire in a gas generator warehouse or the like can be prevented. This improves not only the safety in the event of a vehicle collision, but also the safety against fire.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of a gas generator of the present invention used for a passenger airbag.

FIG. 2 is a sectional view showing a second embodiment of the gas generator of the present invention used for a passenger airbag.

FIG. 3 is a sectional view showing a third embodiment of the gas generator of the present invention used for a passenger airbag.

FIG. 4 is a sectional view showing a fourth embodiment of the gas generator of the present invention used for a passenger airbag.

FIG. 5 is a cross-sectional view showing an example of the gas generator of the present invention used for a driver seat airbag.

FIG. 6 is a sectional view taken along the line CC of FIG. 5;

FIG. 7 is a sectional view showing another example of the gas generator used for the driver seat airbag.

FIG. 8 is a sectional view showing a gas generator used in a conventional airbag.

[Explanation of symbols]

 1,51,61,71,81 Housing 2,3,82,83 Gas generating chamber 4,54,84 Partition member 5,85 Gas generating agent 6,86 Filter 7,8,87,88 Ignition device 9,59, 69 Outer cylinder 9a, 59a, 69a, 89a Gas discharge hole 9b Bottom 9d Burr 10 Cover member 12 Inner cylinder 12a Gas passage hole 13 Filter seal member 14 Cushion member 15,95 Heat transfer agent 16,96 Ignition device 55 Cap member 55b Flange Part 69e swaging part 72a swaging protrusion part 89 upper lid 90 lower lid h gap

[Procedure amendment]

[Submission date] August 21, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 1

[Correction method] Change

[Correction contents]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Claim 2

[Correction method] Change

[Correction contents]

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] Claim 4

[Correction method] Change

[Correction contents]

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] Claim 8

[Correction method] Change

[Correction contents]

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] Claim 12

[Correction method] Change

[Correction contents]

Continued on the front page (72) Inventor Koji Tanaka 3903-39, Tomimachi, Himeji-shi, Hyogo Nippon Kayaku Co., Ltd.Himeji Factory Sensor Technology Co., Ltd. 3903-39, Tomicho-cho Nippon Kayaku Co., Ltd.Himeji Factory Sensor / Technology Co., Ltd.Himeji Technical Center (72) Inventor Norihisa Miyamoto Hyogo Pref.・ Inside Himeji Technical Center, Technology Co., Ltd. 3903-39, Toyotomi-cho, Himeji-shi, Hyogo Prefecture Nippon Kayaku Co., Ltd.Himeji Plant Sensor Technology Co., Ltd. 72) Inventor Yoshiyuki Kishino 3903-39, Toyotomi-cho, Himeji-shi, Hyogo Prefecture Nippon Kayaku Co., Ltd.Sensor Technology in Himeji Factory, Himeji Technical Center Co., Ltd. 39 Nippon Kayaku Co., Ltd. Himeji Plant Sensor Technology Co., Ltd. Himeji Technical Center

Claims (12)

[Claims] 1. A gas discharge hole (9a, 59a, 69a, 8
9a) (1, 51, 61, 7)
, 81) to define a plurality of closed gas generating chambers (2, 3, 82, 83).
, 84), and the gas generating agents (5,
85), the gas generating agent (5, 85) and the housing (1, 5).
, 61, 71, 81) , each of the gas generating chambers (2, 3, 82, 83) is disposed in each of the gas generating chambers (2, 3, 82, 83). A filter (6, 86) for cooling and collecting slag; and a plurality of ignition devices (7) for igniting the gas generating agent (5, 85) in each of the gas generating chambers (2, 3, 82, 83). ,
8, 87, 88), and a gas generator comprising: 2. An outer cylinder (9) having a bottomed cylindrical shape having a gas discharge hole (9a), and a lid member (10) which is abutted and pressed and joined so as to cover an open end of the outer cylinder (9). And a long cylindrical housing (1), and the inside of the housing (1) is divided into two sealed gas generating chambers (2, 2) in the axial direction by the partition member (4).
3), wherein a gas generating agent (5) and a gas passage hole (12a) are provided in each of the gas generating chambers (2, 3) from the axial center of the housing (1) to the radially outer side. The inner cylinder (12) and the cylindrical filter (6) are arranged in this order, and the gas of each of the gas generation chambers (2, 3) is provided on the bottom (9b) and the lid member (10) of the outer cylinder (9). 2. The gas generator according to claim 1, wherein ignition devices (7, 8) for igniting the generator (5) are arranged. 3. An outer cylinder (59) having a bottomed cylindrical shape having a gas discharge hole (59a), and these two outer cylinders (5) are provided.
The open end of 9) is pressed against and joined to each other to form a long tubular housing (51), and the inside of the housing (51) is sealed in the axial direction by the partition member (54). The gas generating chambers (2, 3) are defined, and a gas generating agent (5) is provided in each of the gas generating chambers (2, 3) from the axial center of the housing (51) to the radial outside. An inner cylinder (12) having a gas passage hole (12a) and a cylindrical filter (6) are arranged in this order, and the gas generating chambers (2, 3) are provided at the bottom (59b) of each outer cylinder (59). 2. An ignition device (7, 8) for igniting the gas generating agent (5) according to (1), respectively.
A gas generator according to claim 1. 4. A cylindrical outer cylinder (69) having a gas discharge hole (69a), and two lid members (10) joined to each other by pressure contact so as to cover both open ends of the outer cylinder (69). And a long cylindrical housing (61), and the inside of the housing (61) is axially sealed by the partition member (4) into two sealed gas generating chambers (2, 2).
3), a gas generating agent (5) and a gas passage hole (12a) are respectively provided in each of the gas generating chambers (2, 3) from the axial center of the housing (61) toward the radially outward direction. The inner tube (12) and the cylindrical filter (6) are arranged in this order, and each of the gas generating chambers (2, 3) is provided on each of the lid members (10).
2. A gas generator according to claim 1, wherein ignition devices (7, 8) for igniting the respective gas generating agents are arranged. 5. An elongate cylindrical outer cylinder (69) having a gas discharge hole (69a) and two lid members (10) inserted into both open ends of the outer cylinder (69), respectively. By forming a cylindrical housing (71), a plurality of caulking projections (72a) projecting in the axial direction of the housing (71) from both open ends of the outer cylinder (69) are bent radially inward, Connect each lid member (10) to the outer cylinder (6
The gas generator according to claim 1, wherein the gas generator is fixed to (9). 6. The partition member (54) is formed by abutting two flanged cap members (55),
The flange (55b) of each cap member (55) is connected to each outer cylinder (5).
Burr (59d) formed by butt-welding of 9)
4. The fixing device according to claim 3, wherein
A gas generator according to claim 1. 7. The gas according to claim 6, wherein an elastic filler (56) is interposed between the flanged cap members (55) of the partition member (54). Generator. 8. The partition member (4) is connected to the outer cylinder (6).
9) The housing (61, 7) is formed by drawing on the peripheral surface.
6. The outer cylinder (69) deformed inward in the diameter of (1) and fixed by a caulking portion (69e) of the outer cylinder (69) projecting inward in the drawing. A gas generator according to claim 1. 9. A filter seal member (13) for closing a shaft end of the filter (6) is provided at least between one of the filters (6) and the partition member (4, 54). The gas generator according to any one of claims 1 to 8, wherein: 10. At least one of the gas generating chambers (2, 3) between the gas generating agent (5) and the partition member (4, 54) is provided with the gas generating chambers (2, 3). Cushion member (1) having a heat insulating function of blocking heat transfer between each other
10. The method according to claim 1, further comprising:
A gas generator according to any one of the above. 11. A bottomed cylindrical upper lid (89) having a bottomed cylindrical lower lid (90) and a gas discharge hole (89a) fitted to cover an open end of the lower lid (90). ) To form a short cylindrical housing (81), and the inside of the housing (81) is divided into two sealed gas generating chambers (82, 82) by a partition member (84) in the radial direction.
83), a gas generating agent (85) and a filter (86) are provided in each of the gas generating chambers (82, 83).
Are arranged so as to surround the gas generating agent (85), and the gas generating chambers (82, 83) are provided on the lower lid (90).
Ignition device (8) for igniting each gas generating agent (85)
7. The gas generator according to claim 1, wherein (7,88) is arranged. 12. The ignition device (7, 8, 87, 88).
Is an igniter (16, 96) and the igniter (16, 96)
In it because the Denhizai (15,95) to be ignited, the heat transfer fire agent (15,95), characterized by comprising a nitrogen-containing organic compound from explosive composition having a pyrophoric to fuel The gas generator according to claim 1.