JPH04146843A - Gas generator for development of air bag - Google Patents

Abstract

PURPOSE:To control the combustion of gas generator agents by defining combustion chambers in which gas generator agents are accommodated, by use of partitioning members, at opposite sides of a long size cylindrical member formed with gas outflow apertures at its intermediate portion and causing stepwise combustion of the gas generator agent in each side combustion chamber. CONSTITUTION:This gas generator 41 has a long size cylindrical member 41, which is formed with a number of gas outflow apertures 45 at an intermediate part 43 of its upside portion. Combustion chambers 51, 53 in which gas generator packs 47, 49 are accommodated are defined between a partitioning member 55 and a lid member 59 and between a partitioning member 57 and a lid member 61, respectively. Ignitors 65, 66 for igniting gas generator agents 63, 93 in the combustion chambers 51, 53 are disposed axially of the cylindrical member 41. Note that the ignitor 66 of one side is to arranged as to operate in about 10 to 20m sec after operation of the ignitor 65 of the other side. A cylindrical final filter 67 is disposed inside the intermediate portion 43 of the cylindrical member 41.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an air bag and a life bag for a collision safety device.

The present invention relates to an air bag deployment gas generator used to deploy air bags such as rubber boat escape chutes using combustion gas.

[Conventional technology]

Conventionally, collision safety devices for passenger cars to protect drivers from shocks during collisions include, for example, an airbag with a capacity of 60 liters and a gas generator for deploying an air hack to deploy this airbag with gas. The device consists of a device that ignites and burns a gas generating agent made of explosives or a similar composition filled in the air bank deployment gas generator in the event of a passenger car collision, and the generated gas instantly deploys the air hack. The system protects the driver from collisions and prevents serious injuries to the driver.

FIG. 9 shows a conventional airbag deployment gas generator disclosed in Japanese Patent Application Laid-Open No. 2-155857. It shows the room.

The gas generating agent 13 has an annular plate shape with a through hole 15 formed in the center, and the ignition charge 17 is accommodated in the through hole 15 .

These gas generating agents 13 are housed in a sealed container 19, and in the center of this sealed container 19, the gas generating agents 13 are stored.
A recessed portion 21 is formed to be depressed toward the through hole 15 side.

An igniter 23 for burning the gas generating agent 13 is arranged in this recess 21 .

A combustion chamber filter 25 is disposed along the inner periphery of the combustion chamber 11, and an annular filling chamber 27 surrounds the combustion chamber 11 and allows gas that has passed through the combustion chamber filter 25 to flow into it through an orifice 26. It is located in

Inside the air chamber 27, an air chamber filter consisting of an upper filter 29 and a gas filtration filter 31 is housed.

Furthermore, a gas outlet 33 is formed in the air filling chamber 27 for allowing the gas that has passed through the gas filtration filter 31 to flow out to the air bag.

In such an airbag deployment gas generator, when electricity is applied to the igniter 23, the ignition powder 17 is combusted by combustion of the gunpowder in the igniter 23, and the gas generating agent 13 is combusted by this combustion. After the gas from the gas generating agent 13 passes through the combustion chamber filter 19 arranged along the inner circumference of the combustion chamber 11 and flows into the filling chamber 27, it is purified by the upper filter 29 and the gas filtration filter 31. and the gas outlet 33
The air flows into the air bag through the air bag, and the air bag is fully inflated in a short time of, for example, about 0.04 seconds.

[Problem to be solved by the invention]

However, such a conventional airbag deployment gas generator has a problem in that there is a limit to the combustion gas capacity of the gas generating agent 13, and there is also a limit to the combustion gas purification performance.

In other words, especially when the front passenger seat is used to deploy the airbag, the passenger seat has a different riding environment than the driver's seat, the occupant's posture is not constant, children may be seated in the passenger seat, and the passenger's body may be affected. Because of the large disparity, for example, an airbag with a large capacity of about 2.5 times that of a conventional airbag for the driver's seat is required, and therefore the combustion gas capacity of the gas generating agent is large. There has been a need for a gas generator for airbag deployment that can reliably purify combustion gas.

In addition, in Japanese Patent Application Laid-open No. 1-297336, a gas generating agent is placed in the center of a cylindrical member, this gas generating agent is combusted by an igniter, and the combustion gas is sent from the gas outlet of the cylindrical member to an air bag. A gas generating device for deploying an airbag is disclosed, which has a structure in which a gas outlet is formed in a cylindrical member, so that a large amount of combustion gas can be sent to the airbag more efficiently than before. However, since a tablet-shaped gas generating agent is used, at the start of combustion, the burning surface area of the gas generating agent is large, and therefore a large amount of gas is generated, causing the problem of rapidly inflating the air bag. there were.

Furthermore, Japanese Patent Application Laid-Open No. 1-289736 discloses an airbag deployment gas generator in which two or more driver side devices are assembled on a specially made plywood. Because it has two igniters,
You can control each ignition time, but
Weight because two or more driver-side devices must be installed.

There was a problem in that the shape could not be made smaller and a large volume of combustion gas could not be efficiently sent to the airbag.

The present invention solves the above-mentioned problems, and makes it possible to significantly increase the combustion gas capacity of the gas generating agent compared to the conventional one, and also to reliably purify a large volume of combustion gas. It is an object of the present invention to provide a gas generator for deploying an air bag that can adjust the combustion of a gas generating agent.

[Means to solve the problem]

In the airbag deployment gas generating device according to claim 1, a combustion chamber in which a gas generating agent is housed is formed by a partition member on both sides of a long cylindrical member having a gas outlet formed in an intermediate portion. In addition, a cylindrical final filter is arranged inside the middle part of the cylindrical member, an intermediate filter is arranged between the final filter inside the cylindrical member and the partition member, and an intermediate filter is arranged inside the middle part of the cylindrical member. An orifice is opened at a position on the side of the filter, and an igniter is further disposed in at least the combustion chamber on one side, and after combustion of the gas generating agent in the combustion chamber on the one side,
After a predetermined period of time has elapsed, the gas generating agent in the combustion chamber on the other side is combusted.

The airbag deployment gas generator according to claim 2 is the airbag deployment gas generator according to claim 1.
The combustion of the gas generating agent in the combustion chamber on one side causes the gas generating agent in the combustion chamber on the other side to be combusted.

The airbag deployment gas generator according to claim 3 is the airbag deployment gas generator according to claim 1.
or 2, a plurality of annular gas generating agents are stacked in the axial direction in the combustion chamber, and the thickness of the gas generating agent accommodated in the combustion chamber on the other side is the same as that of the gas generating agent accommodated in the combustion chamber on the one side. It is said to be smaller than the thickness of the generator.

In the airbag deployment gas ordering device according to claim 4, a combustion chamber in which a gas generating agent is housed is formed by a partition member on both sides of a long cylindrical member in which a gas outlet is formed in the middle part. In addition, a cylindrical final filter is arranged inside the middle part of the cylindrical member, an intermediate filter is arranged between the final filter inside the cylindrical member and the partition member, and an intermediate filter is arranged inside the middle part of the cylindrical member. An orifice is opened at a position on the side of the filter, an igniter is arranged in the combustion chamber on one side, and a pressure release valve is arranged in the partition member of the combustion chamber on the other side. be.

In the airbag deployment gas generating device according to claim 5, a combustion chamber in which a gas generating agent is housed is formed by a partition member on both sides of a long cylindrical member in which a gas outlet is formed in the middle portion. In addition, a cylindrical final filter is arranged inside the middle part of the cylindrical member, an intermediate filter is arranged between the final filter inside the cylindrical member and the partition member, and an intermediate filter is arranged inside the middle part of the cylindrical member. An orifice is opened at a position on the side of the filter, and an igniter is arranged in the combustion chamber on one side, and a partition member of the combustion chamber on the other side is arranged so that the pressure inside the cylindrical member is a predetermined pressure. It consists of a detonator device that ignites when the explosion occurs.

In the airbag deployment gas generating device according to claim 6, a combustion chamber in which a gas generating agent is housed is formed by a partition member on both sides of a long cylindrical member in which a gas outlet is formed in an intermediate portion. In addition, a cylindrical final filter is arranged inside the middle part of the cylindrical member, an intermediate filter is arranged between the final filter inside the cylindrical member and the partition member, and an intermediate filter is arranged inside the middle part of the cylindrical member. An orifice is opened at a position on the side of the filter, and an igniter is disposed in the combustion chamber on one side, and the combustion chamber on the one side and the combustion chamber on the other side are connected.
After a predetermined period of time has elapsed after the start of combustion of the gas generating agent in the combustion chamber on one side, the gas generating agent in the combustion chamber on the other side is connected by a ignition device that ignites the gas generating agent in the combustion chamber on the other side.

[For production]

In the airbag deployment gas generator according to the first aspect, the combustion of the gas generating agent in the one side combustion chamber is first started by the operation of the igniter in the one side combustion chamber, and then, after a predetermined period of time has passed, the combustion of the gas generating agent in the one side combustion chamber is started. Combustion of the gas ordering agent in the combustion chamber on the other side starts. When the gas generating agent burns in the combustion chamber, the combustion gas in each combustion chamber flows out from the orifice of the partition member, flows into the intermediate filter, and then folds back the intermediate filter to fill the central cavity of the intermediate filter. The gas flows into the cavity of the final filter, passes through the final filter, and then flows out to the airbag side from the gas outlet formed in the middle part of the cylindrical member.

In the airbag deployment gas generator according to the second aspect of the present invention, the combustion of the gas generating agent in the combustion chamber on one side causes the gas generating agent in the combustion chamber on the other side to be combusted.

In the airbag deployment gas generator of claim 3, the gas generating agent housed in the combustion chamber on the other side, which has a later combustion start time, burns faster than the gas generating agent housed in the combustion chamber on the one side. , the combustion gas capacity per unit time becomes larger than the combustion gas capacity of one side of the gas generating agent.

In the gas generator for air bank deployment according to claim 4, due to the combustion of the gas generating agent in the combustion chamber on one side, a large amount of pressure acts on the partition member of the combustion chamber on the other side, and the pressure release valve of the partition member is ruptured. The flame of the gas generating agent in one combustion chamber flows into the other side combustion chamber from this part, and the gas generating agent in the other side combustion chamber is burned after a predetermined time has elapsed from the start of combustion of the one side gas generating agent, This combustion gas flows out from the orifice of the partition member, flows into the intermediate filter, turns around the intermediate filter, passes through the central cavity of the intermediate filter, flows into the cavity of the final filter, and passes through the final filter. Thereafter, the gas flows out to the airbag side from the gas outlet formed in the middle part of the cylindrical member.

In the gas generating device for airbag deployment according to claim 5, when a predetermined pressure is applied to the partition member of the combustion chamber on the other side due to combustion of the gas generating agent in the combustion chamber on one side, the detonator device is activated and ignites. Due to the ignition, the gas generating agent in the combustion chamber on the other side is combusted after a predetermined time has elapsed from the start of combustion of the gas generating agent on the other side, and this combustion gas flows out from the orifice of the partition member, flows into the intermediate filter, and then enters the intermediate filter. The filter is folded back, the gas flows through the central cavity of the intermediate filter, into the cavity of the final filter, and after passing through the final filter, the gas flows from the gas outlet formed in the intermediate part of the cylindrical member to the airbag side. leak.

In the gas generating device for airbag deployment according to claim 6, the ignition device is actuated by the combustion of the gas generating agent in the combustion chamber on one side, and a predetermined period of time elapses after the start of combustion of the gas generating agent in the combustion chamber on the one side. Later, the gas generating agent in the combustion chamber on the other side is ignited, and due to this ignition, the gas generating agent in the combustion chamber on the other side is combusted after a predetermined time has elapsed from the start of combustion of the gas generating agent on the one side, and this combustion gas is , flows out from the orifice of the partition member, flows into the intermediate filter, folds back the intermediate filter, passes through the central cavity of the intermediate filter, flows into the cavity of the final filter, passes through the final filter, and then flows into the cylindrical The gas flows out to the airbag side from the gas outlet formed in the middle part of the member.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, details of the present invention will be described with reference to embodiments shown in the drawings.

FIG. 1 shows an embodiment of the airbag deployment gas generator of the present invention, and in the figure, reference numeral 41 indicates a long cylindrical member.

A large number of gas outlet ports 45 are formed on the upper side of the intermediate portion 43 of this cylindrical member 41 .

Gas generating agent bags 47 and 49 are provided on both sides of the cylindrical member 41.
The combustion chamber 51.53 that accommodates the partition member 55.57
and lid members 59 and 61.

In addition, in the center of the lid members 59.61 on both sides of the cylindrical member 41, igniters 65.66 for igniting the gas generating agent 63.93 in the combustion chamber 51.53 are installed around the axis of the cylindrical member 410. arranged in the longitudinal direction.

In this embodiment, the igniter 66 on the other side is configured to operate approximately 10 to 20 m5eC after the igniter 65 on the one side operates.

A cylindrical final filter 67 is arranged inside the intermediate portion 43 of the cylindrical member 41 .

This final filter 67 is, for example, a fine wire mesh.

Consisting of layers of folded woven wire mesh, etc., it cools the combustion gas to the extent that the airbag will not burn out, removes combustion residue contained in the combustion gas, and supplies only harmless nitrogen gas to the airbag. It has a function.

The final filter 67 and the partition member 55 inside the cylindrical member 41
．． A cylindrical intermediate filter 69 is arranged between the filter 57 and the filter 57 .

This intermediate filter 69 has a bottom surface 7 on the final filter 67 side.
It is housed in an annular partition plate 73 having a diameter of 1.

A plurality of orifices 75 are opened at positions on the sides of the intermediate filter 69 of the partition members 55 and 57.

Note that the -1 intermediate filter 69 is formed, for example, by press-molding a stainless steel knitted wire mesh, and the orifice 7
The high flow rate combustion gas ejected from the intermediate filter 69
By colliding with the wire mesh, this high-velocity combustion gas becomes a turbulent flow, which acts to cause the residue of the combustion gas to adhere to the wire mesh.

FIG. 2 shows details of the gas generating agent pack 47 accommodated in the combustion chamber 51 on one side, and in the figure, the reference numeral 77 indicates a sealed container made of, for example, an aluminum cap 79 and a cup 81. ing.

In this sealed container 77, for example, five sheets of gas generating agent 6 are placed.
3 are arranged in a stacked manner in the axial direction of the cylindrical member 41.

Each gas generating agent 63 is formed into an annular plate shape with a through hole 83 formed in the center.
is filled.

A recess 87 is formed on the lid member 59 side of the sealed container 77, and the igniter 65 is inserted into the recess 87.

A separator 89 is arranged between each gas generating agent 63.

These separators 89 are made of stainless steel, for example.
It is made of an annular wire mesh using 0 to 45 mesh, which improves the ignitability of the gas generating agent 63 and also makes it possible to secure an exhaust passage for the gas generating agent 63.

Further, a combustion chamber filter 91 is disposed on the inner periphery of the gas generating agent pack 47, and is made of, for example, a wire mesh made of 10 to 35 meshes made of stainless steel. 63, it functions to remove the residue of the combustion gas, cool the combustion gas, and secure an exhaust passage for the combustion gas.

Note that the gas generating agent pack 49 on the other side is connected to the combustion chamber 5 on the one side.
It is almost the same as the gas generating agent pack 47 shown in FIG. 2, except that 10 sheets of gas generating agent 93, which is about half the thickness of the gas generating agent 63 contained in the gas generating agent pack 1, are stored therein. Therefore, the same parts are given the same reference numerals and detailed explanations will be omitted.

In the airbag deployment gas generator configured as described above, when electricity is applied to the igniters 65 and 66 disposed in the combustion chambers 51 and 53 on both sides, the igniter 85 is combusted, and this combustion As a result, the gas generating agent 63.93 burns, the pressure of the combustion gas breaks the sealed container 77, and the combustion gas passes through the orifice 75 of the partition member 55.57.
It flows into the intermediate filter 69 , collides with the partition plate 73 , turns around, passes through the cavity 99 of the intermediate filter 69 , flows into the cavity 101 of the final filter 67 , and flows into the final filter 67
The gas is purified by the air and flows into the airbag through the gas outlet 45.

In this embodiment, the igniter 66 on the other side is configured to operate approximately 10 to 20 m5eC after the igniter 65 on the one side operates, so that the igniter 66 on the other side is activated at a predetermined time from the start of combustion of the gas generating agent 63 on the one side. After a period of time has elapsed, the gas generating agent 93 on the other side will be burned.

In the airbag deployment gas generator configured as described above, the gas generating agent 63.
The combustion chamber 5153 in which the combustion chamber 93 is accommodated is separated by the partition member 55.5.
7, and the intermediate portion 43 of the cylindrical member 41
A cylindrical final filter 67 is arranged inside the cylindrical member 4.
An intermediate filter 69 is disposed between the final filter 67 inside the filter 1 and the partition member 55.57, and an orifice 75 is opened at a position on the side of the intermediate filter 69 in the partition member 5557. The combustion gas capacity can be significantly increased compared to the conventional one, a large volume of combustion gas can be reliably purified, and furthermore, the combustion of the gas generating agent can be easily adjusted.

That is, in the air hack deployment gas generator configured as described above, combustion chambers 51.5 are provided on both sides of the cylindrical member 41.
3, and a gas outlet 4 in the middle part 43 of the cylindrical member 41.
Since the combustion gas is made to flow out from No. 5 to the air bag, the combustion gas capacity of the gas generating agent can be significantly increased compared to the conventional one.

In addition, the separator 89 in the gas generating agent bag 47.49
．． Combustion chamber filter 91 and intermediate filter 69. Since the final filter 67 purifies the combustion gas, a large amount of combustion gas can be reliably purified.

Further, the igniter 66 on the other side is activated after a predetermined period of time has elapsed after the igniter 65 on the one side is activated, so that, for example, from the combustion start time of the gas generating agent 63 in the combustion chamber 51 on the one side
Since the gas generating agent 93 in the combustion chamber 53 on the other side is combusted after 10 to 20 m5ec, it is possible to completely suppress the occupant after fixing the occupant to a certain extent.

That is, in FIG. 3, the horizontal axis represents time, the left vertical axis represents the pressure in the combustion chamber 51.53, and the right vertical axis represents 60! It measures the pressure in the tank and shows the amount of combustion gas generated over time.Curve A shows the pressure change in the combustion chamber 51 on one side and combustion chamber 53 on the other side, and curve B shows the amount of combustion gas generated over time. It shows the pressure change when it flows into the tank, and it shows the pressure change when it flows into the tank.
From the combustion start time of the gas generating agent 63 in 1, for example, 1
It can be seen that after 0 to 20 m5 ec, the gas generating agent 93 in the combustion chamber 53 on the other side is surely combusted.

Furthermore, in the airbag deployment gas generator configured as described above, a plurality of annular gas generating agents 63.93 are stacked in the axial direction in the combustion chamber 51.53, and Since the thickness of the gas generating agent 93 accommodated in the combustion chamber 51 is made smaller than that of the gas generating agent 63 accommodated in the combustion chamber 51 on one side, the gas generating agent 93 is accommodated in the combustion chamber 53 on the other side, which starts combustion later. The gas generating agent 93 has a larger combustion specific surface area than the gas generating agent 63 housed in the combustion chamber 51 on one side, and the combustion gas capacity per unit time is larger than the combustion gas capacity of the gas generating agent 63 on the one side. , Thereby, the air bank deployment volume can be adjusted to an optimal state with respect to the air bag deployment time.

FIG. 4 shows another embodiment of the gas generator for deploying an air hack according to the present invention. In this embodiment, a through hole 95 is provided in the center of the partition member 57 that forms the combustion chamber 53 on the other side. A pressure release valve 97 made of aluminum, for example, is fixed to cover the through hole 95 .

In the airbag deployment gas generator configured as described above, when electricity is supplied to the igniter 65 disposed in the combustion chamber 51 on one side, the ignition charge 85 is combusted, and due to this combustion, gas is generated. The agent 63 burns, the pressure of the combustion gas breaks the sealed container 77, the combustion gas passes through the orifice 75 of the partition member 55, flows into the intermediate filter 69, collides with the partition plate 73, and after being reversed, The gas passes through the cavity 99 of the intermediate filter 69, flows into the cavity 101 of the final filter 67, is purified by the final filter 67, and flows into the airbag through the gas outlet 45.

On the other hand, due to the combustion of the gas generating agent 63 in the combustion chamber 51 on one side, a large amount of pressure acts on the partition member 57 of the combustion chamber 53 on the other side, and the pressure release valve 97 of the partition member 57 is ruptured. The flame of the gas generating agent 63 in the combustion chamber 51 of one example flows into the combustion chamber 53 on the other side, the ignition charge 85 is combusted, and the gas generating agent 93 in the combustion chamber 53 on the other side is one example of the gas generating agent. 63 is combusted after a predetermined period of time has elapsed from the start of combustion, this combustion gas flows out from the orifice 75 of the partition member 57, flows into the intermediate filter 69 like the combustion gas in the combustion chamber 51 on one side, and then passes through the intermediate filter 63. 69, passes through the central cavity 99 of the intermediate filter 69, flows into the cavity 101 of the final filter 67, and after passing through the final filter 67, the gas outlet is formed in the intermediate part of the cylindrical member 41. 45, flows out to the airbag side.

In the airbag deployment gas ordering device configured as described above, the pressure release valve 97 is arranged in the partition member 57 of the combustion chamber 53 on the other side, and the combustion of the gas generating agent 63 in the combustion chamber 51 on the one side is performed. For example, 10 to 20 m5ec after the start time,
Since the gas generating agent 93 in the combustion chamber 53 on the other side is burnt, it becomes possible to completely suppress the occupant after fixing the occupant to a certain extent.

FIG. 5 shows still another embodiment of the airbag deployment gas generator of the present invention. In this embodiment, a through hole is provided in the center of the partition member 57 forming the combustion chamber 53 on the other side. 95 is formed, and a detonator device 98 is inserted and fixed into this through hole 95.

FIG. 6 shows details of the detonator device 98, and in the figure, reference numeral 111 indicates a screw portion 1 inserted into the through hole 95 of the partition member 57.
13 is shown.

The head 115 of the casing 111 has a small diameter hole 117.
is formed, and a large diameter hole 121 is formed in the main body portion 119.

A detonator holder 125 having a hole 123 formed in the center is screwed onto the tip of the main body 119, and a piercing detonator 127 is disposed at the center inside the detonator holder 125.

A sliding member 129 is provided in the hole 121 of the casing 111.
is arranged, and a fire pin 131 is formed protruding from the piercing detonator 127 side of this sliding member 129.

Further, the head 115 of the sliding member 129 has an annular groove 133.
An O-ring 135 is formed in this annular groove 133.
is located.

A spring 137 is arranged between the sliding member 129 and the detonator holder 125.

In the airbag deployment gas generator configured as described above, when electricity is supplied to the igniter 65 disposed in the combustion chamber 51 on one side, the ignition charge 85 is combusted, and due to this combustion, gas is generated. The agent 63 burns, the pressure of the combustion gas breaks the sealed container 77, the combustion gas passes through the orifice 75 of the partition member 55, flows into the intermediate filter 69, collides with the partition plate 73, and after being reversed, The gas passes through the cavity 99 of the intermediate filter 69, flows into the cavity 101 of the final filter 67, is purified by the final filter 67, and flows into the airbag through the gas outlet 45.

On the other hand, due to the combustion of the gas generating agent 63 in the combustion chamber 51 on one side, a large amount of pressure acts on the partition member 57 of the combustion chamber 53 on the other side.
When the pressure reaches approximately 50 atmospheres, the sliding member 129 moves toward the piercing detonator 127 against the biasing force of the spring 137.
The fire pin 131 at the tip of the sliding member 129 pierces the piercing detonator 127, and as a result, the piercing detonator 127 ignites, the ignition charge 85 burns, and the gas generating agent in the combustion chamber 53 on the other side is ignited. 93 is burned after a predetermined period of time has elapsed from the start of combustion of one example of the gas generating agent 63.

This combustion gas flows out from the orifice 75 of the partition member 57 and flows into the intermediate filter 69 like the combustion gas in the combustion chamber 51 on one side. It passes through the cavity 99 and flows into the cavity 101 of the final filter 67 .
7, the gas flows out from the gas outlet 45 formed in the middle part of the cylindrical member 41 to the air bag side.

In the airbag deployment gas generator configured as described above, the detonator device 9 is attached to the partition member 57 of the combustion chamber 53 on the other side.
8, and the gas generating agent 93 in the combustion chamber 53 on the other side is combusted, for example, 10 to 20 m5ec after the combustion start time of the gas generating agent 63 in the combustion chamber 51 on the one side. After fixing the occupant to a certain extent, it becomes possible to completely restrain the occupant.

FIG. 7 shows another embodiment of the airbag deployment gas generator of the present invention. In this embodiment, the combustion chamber 51 on one side and the combustion chamber 53 on the other side are They are connected by a ignition device 197 that ignites the gas generating agent 93 in the other combustion chamber 53 after a predetermined period of time has passed after the combustion of the gas generating agent 63 in the chamber 51 has started.

In this embodiment, the fuse 197 includes an RDC (
Rapid Defragment Cord
EDYNE MCCORMICCK 5ELPH Co., Ltd.) is used.

That is, a through hole 95 is formed in the center of the partition member 55.57 that forms the combustion chambers 51.53 on one side and the other side.
53 is inserted and fixed.

The input member 151 and the output member 153 are interconnected along the central axis by a fuse 155 filled with explosives.

Note that the input member 151 is fixed to the partition member 55 by a head 157 formed on the input member 151 and a nut 159.

Further, it is screwed and fixed within a holder 161 that is screwed and fixed to the output member 153 and the partition member 57.

In the airbag deployment gas generator configured as described above, when electricity is supplied to the igniter 65 disposed in the combustion chamber 51 on one side, the ignition charge 85 is combusted, and due to this combustion, gas is generated. The agent 63 burns, the pressure of the combustion gas breaks the sealed container 77, the combustion gas passes through the orifice 75 of the partition member 55, flows into the intermediate filter 69, collides with the partition plate 73, and after being reversed, The gas passes through the cavity 99 of the intermediate filter 69, flows into the cavity 101 of the final filter 67, is purified by the final filter 67, and flows into the airbag through the gas outlet 45.

On the other hand, due to the combustion of the gas generating agent 63 in the combustion chamber 51 on one side, the ignition device 197 is activated, and the flame in the combustion chamber 51 on the one side is transmitted to the input member 151. Fuse 155, output member 153
The ignition powder 85 is transmitted into the combustion chamber 53 on the other side via the
However, after the combustion of the gas generating agent 63 in the combustion chamber 51 on one side starts,
After a predetermined period of time has elapsed, the gas generating agent 93 in the combustion chamber 53 on the other side is combusted after a predetermined period of time has elapsed from the start of combustion of the gas generating agent 63 on the one side.

This combustion gas flows out from the orifice 75 of the partition member 57, flows into the intermediate filter 69 like the combustion gas in the combustion chamber 51 on one side, and then folds back the intermediate filter 69 to form a cavity in the center of the intermediate filter 69. 99 and flows into the cavity 101 of the final filter 67 .
After passing through, the gas flows out to the air hack side from the gas outlet 45 formed in the middle part of the cylindrical member 41.

In the air hack deployment gas generator configured as described above, the combustion chamber 51 on one side and the combustion chamber 53 on the other side are connected after a predetermined period of time has passed after the start of combustion of the gas generating agent 63 in the combustion chamber 51 on the one side. , connected by a ignition device 197 that ignites the gas generating agent 93 in the combustion chamber 53 on the other side, and from the combustion start time of the gas generating agent 63 in the combustion chamber 51 on the one side, for example,
After mseC, the gas generating agent 93 in the combustion chamber 53 on the other side is combusted, so that after the occupant is fixed to a certain extent, it is possible to completely suppress the occupant.

In addition, in the embodiment described above, an example was described in which the thickness of the gas generating agent 63.93 was made different between the combustion chamber 51 on one side and the combustion chamber 53 on the other side. For example, as shown in FIG.
Of course, they may have the same thickness.

〔Effect of the invention〕

As described above, in the airbag deployment gas generating device according to claim 1, the combustion chamber in which the gas generating agent is housed is provided on both sides of the elongated cylindrical member in which the gas outlet is formed in the middle part. ,
A cylindrical final filter is arranged inside the middle part of the cylindrical member, an intermediate filter is arranged between the final filter inside the cylindrical member and the partition member, and a cylindrical final filter is arranged inside the middle part of the cylindrical member. An orifice is opened at a position on the side of the filter, and an igniter is arranged in at least one side of the combustion chamber. Since the gas generating agent in the combustion chamber is combusted, the combustion gas capacity of the gas generating agent can be significantly increased compared to conventional methods, and a large amount of combustion gas can be reliably purified. Combustion of the generator can be regulated.

In the airbag deployment gas generator of claim 2, the combustion of the gas generating agent in the combustion chamber on one side causes the gas generating agent in the combustion chamber on the other side to be burned, so that the gas generating agent in the combustion chamber on the other side is burned. The generating agent can be reliably combusted after a predetermined period of time has elapsed from the start of combustion of the gas generating agent in the combustion chamber on one side.

In the gas generating device for airbag deployment according to claim 3, a plurality of annular gas generating agents are stacked in the axial direction within the combustion chamber, and the thickness of the gas generating agent accommodated in the combustion chamber on the other side is set on one side. Because it is smaller than the thickness of the gas generating agent housed in the combustion chamber of
The gas generating agent housed in the combustion chamber on the other side, which has a later combustion start time, has a larger combustion specific surface area than the gas generating agent housed in the combustion chamber on one side, and the combustion gas capacity per unit time is lower than that of the gas generating agent housed in the combustion chamber on the other side. This makes it possible to adjust the airbag deployment volume to the optimum state with respect to the airbag deployment time.

In the airbag deployment gas generator of claim 4, on both sides of the elongated cylindrical member in which the gas outlet is formed in the middle part,
A combustion chamber in which the gas generating agent is accommodated is formed by a partition member, and a cylindrical final filter is arranged inside the intermediate portion of the cylindrical member, and a cylindrical final filter is arranged between the final filter inside the cylindrical member and the partition member. An intermediate filter is arranged in the partition member, an orifice is opened at a position on the side of the intermediate filter in the partition member, and an igniter is arranged in the combustion chamber on one side, and in the partition member of the combustion chamber on the other side, By installing a pressure release valve, the combustion gas capacity of the gas generating agent can be significantly increased compared to conventional models, and large volumes of combustion gas can be reliably purified, and the combustion of the gas generating agent can be adjusted. can do.

In the airbag deployment gas generator of claim 5, on both sides of the elongated cylindrical member in which the gas outlet is formed in the middle part,
A combustion chamber in which the gas generating agent is accommodated is formed by a partition member, and a cylindrical final filter is arranged inside the intermediate portion of the cylindrical member, and a cylindrical final filter is arranged between the final filter inside the cylindrical member and the partition member. An intermediate filter is arranged in the partition member, an orifice is opened at a position on the side of the intermediate filter in the partition member, and an igniter is arranged in the combustion chamber on one side, and in the partition member of the combustion chamber on the other side, Since a detonator device is installed that ignites when the pressure inside the cylindrical member reaches a predetermined pressure, the combustion gas capacity of the gas generating agent can be significantly increased compared to conventional methods, and a large volume of combustion gas can be reliably purified. is possible,
Furthermore, the combustion of the gas generating agent can be regulated.

In the airbag deployment gas generator of claim 6, on both sides of the elongated cylindrical member in which the gas outlet is formed in the middle part,
A combustion chamber in which the gas generating agent is accommodated is formed by a partition member, and a cylindrical final filter is arranged inside the intermediate portion of the cylindrical member, and a cylindrical final filter is arranged between the final filter inside the cylindrical member and the partition member. An intermediate filter is placed in the partition member, an orifice is opened at a position on the side of the intermediate filter, and an igniter is placed in the combustion chamber on one side, and the combustion chamber on one side and the combustion chamber on the other side are connected. The chambers are connected by a ignition device that ignites the gas generating agent in the other side of the combustion chamber after a predetermined period of time has elapsed after the combustion of the gas generating agent in the combustion chamber on one side starts, so that the combustion gas capacity of the gas generating agent can be controlled. This can be significantly increased compared to the conventional method, and a large amount of combustion gas can be reliably purified, and furthermore, the combustion of the gas generating agent can be adjusted.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the airbag deployment gas generator of the present invention. FIG. 2 is a longitudinal sectional view showing a gas generating agent pack accommodated in the example combustion chamber of FIG. 1. FIG. FIG. 3 is a graph showing pressure changes in the combustion chambers on one side and the other side of the airbag deployment gas ordering device shown in FIG. 1, and in the 60j2 tank. FIG. 4 is a longitudinal sectional view showing another embodiment of the airbag deployment gas generator of the present invention. FIG. 5 is a longitudinal cross-sectional view showing still another embodiment of the airbag deployment gas generator of the present invention. FIG. 6 is a longitudinal sectional view showing the detonator device accommodated in the combustion chamber on the other side of FIG. 5. FIG. FIGS. 7 and 8 are longitudinal cross-sectional views showing still other embodiments of the airbag deployment gas generator of the present invention. FIG. 9 is a longitudinal cross-sectional view showing a conventional airbag deployment gas generator. [Explanation of symbols of main parts] 41...Cylindrical member 43...Intermediate portion 45...Gas outlet 51.53...Combustion chamber 55.57...Partition member 63.93... - Gas generating agent 65,66... Igniter 67... Final filter 69... Intermediate filter 75... Orifice 97... Pressure release valve 98... Detonator device 197... Ignition device.

Claims (6)

[Claims] (1) A combustion chamber in which a gas generating agent is housed is formed on both sides of a long cylindrical member in which a gas outlet is formed in the middle part, and a combustion chamber in which a gas generating agent is accommodated is formed by a partition member, and the middle part of the cylindrical member is A cylindrical final filter is arranged inside, an intermediate filter is arranged between the final filter inside the cylindrical member and the partition member, and an orifice is provided at a position on the side of the intermediate filter of the partition member. further, an igniter is disposed in at least the combustion chamber on one side, and after a predetermined period of time has elapsed after the combustion of the gas generating agent in the combustion chamber on one side, the gas generating agent in the combustion chamber on the other side is combusted. A gas generator for airbag deployment characterized by: (2) The gas generating device for airbag deployment according to claim 1, wherein the combustion of the gas generating agent in the combustion chamber on one side causes the gas generating agent in the combustion chamber on the other side to be combusted. (3) A plurality of annular gas generating agents are stacked in the axial direction in the combustion chamber, and the thickness of the gas generating agent accommodated in the combustion chamber on the other side is the same as that of the gas generating agent accommodated in the combustion chamber on one side. 3. The gas generator for deploying an air bag according to claim 1, wherein the thickness of the gas generator is smaller than the thickness of the agent. (4) Combustion chambers in which the gas generating agent is housed are formed on both sides of the elongated cylindrical member in which the gas outlet is formed in the middle part, and the middle part of the cylindrical member is A cylindrical final filter is arranged inside, an intermediate filter is arranged between the final filter inside the cylindrical member and the partition member, and an orifice is provided at a position on the side of the intermediate filter of the partition member. A gas generator for deploying an airbag, further comprising: an igniter disposed in the combustion chamber on one side, and a pressure release valve disposed on a partition member of the combustion chamber on the other side. . (5) Combustion chambers in which the gas generating agent is housed are formed on both sides of the elongated cylindrical member in which the gas outlet is formed in the middle part, and a combustion chamber in which the gas generating agent is accommodated is formed by partition members, and the middle part of the cylindrical member is A cylindrical final filter is arranged inside, an intermediate filter is arranged between the final filter inside the cylindrical member and the partition member, and an orifice is provided at a position on the side of the intermediate filter of the partition member. further, an igniter is arranged in the combustion chamber on one side, and a detonator device that ignites when the pressure in the cylindrical member reaches a predetermined pressure is arranged in the partition member of the combustion chamber on the other side. A gas generator for airbag deployment, which is characterized by: (6) Combustion chambers in which a gas generating agent is housed are formed on both sides of a long cylindrical member in which a gas outlet is formed in the middle part, and combustion chambers in which a gas generating agent is accommodated are formed by partition members, and A cylindrical final filter is arranged inside, an intermediate filter is arranged between the final filter inside the cylindrical member and the partition member, and an orifice is provided at a position on the side of the intermediate filter of the partition member. Further, an igniter is placed in the combustion chamber on the one side, and the combustion chamber on the one side and the combustion chamber on the other side are opened for a predetermined period of time after the combustion of the gas generating agent in the combustion chamber on the one side starts. 1. A gas generating device for deploying an airbag, characterized in that the device is connected by a ignition device that ignites a gas generating agent in the other side of the combustion chamber after the combustion chamber has elapsed.