JPH0747910A - Air bag equipment - Google Patents

Abstract

PURPOSE:To reduce any impact to crew as well as to secure a large volume of gas by arranging a plurality of gas generating containers in parallel and also a retardant mechanism for relatively delaying the ignition timing of a gas generating agent inside one of the gas generating containers. CONSTITUTION:A plurality of gas generating containers 45, 46 are arranged in parallel on the back side of an air bag storing container 41. A retardant mechanism 55 is arranged to delay the ignition timing of a gas generating agent 13 inside one 46 of the gas generating containers from that of the gas generating agent 13 inside the other 45 gas generating containers. The retardant mechanism 55 is composed of a plural number of fuses 57, 58. In other words, the plural fuses 57, 58 are composed by having their respective input members 61 and output members 63 mutually connected by a plurality of fuses 65, 66 changed with powder along the central shaft. And also input member 61 is connected to an output distributor 69. Further the output distributor 69 has an electrical igniter 71, which makes ignition by a signal sent from an acceleration detecting sensor, connected thereto.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag device for a collision safety device.

[0002]

2. Description of the Related Art Conventionally, in a passenger car, an airbag device for a collision safety device for protecting a driver from a shock at the time of a collision is, for example, an airbag having a volume of 60 liters and a gas for the airbag. And a gas generator for deploying an airbag for igniting, a gas generating agent consisting of explosives or a similar composition filled in the gas generator for deploying an airbag when a passenger vehicle collides. The fuel is burned and the generated gas instantly deploys the airbag to protect the driver from a collision and prevent serious injury to the driver.

FIG. 3 shows a conventional gas generator for deploying an air bag disclosed in Japanese Patent Application Laid-Open No. 2-155857, in which reference numeral 11 indicates a plurality of gas generating agents 13.
Shows a combustion chamber housed in a stacked state. The gas generating agent 13 has an annular plate shape in which a through hole 15 is formed in the center, and the ignition agent 17 is accommodated in the through hole 15.

These gas generating agents 13 are contained in a sealed container 19
A recess 21 is formed at the center of the hermetically sealed container 19 and is recessed toward the through hole 15 side of the gas generating agent 13. An igniter 23 for burning the gas generating agent 13 is arranged in the recess 21.

A combustion chamber filter 25 is arranged along the inner circumference of the combustion chamber 11, and a gas which surrounds the combustion chamber 11 and has passed through the combustion chamber filter 25 flows from an orifice 26 into a charging chamber 27. Are arranged in a ring. In addition, a filling chamber filter including an upper filter 29 and a gas filtering filter 31 is housed in the filling chamber 27.

Further, in the charging chamber 27, there is formed a gas outlet 33 for discharging the gas passing through the gas filter 31 to the airbag. In such an airbag-deploying gas generator, when electricity is applied to the igniter 23, the explosive in the igniter 23 burns to ignite the igniting charge 17, and the combustion causes the gas generant 13 to burn. Then, the gas of 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 charging chamber 27, and then is purified by the upper filter 29 and the gas filtration filter 31. The gas then passes through the gas outlet 33 and flows into the airbag, and the airbag is sufficiently inflated in a short time of, for example, about 0.04 seconds.

[0007]

However, in such a conventional airbag device, there is a limit in the capacity of the combustion gas of the gas generating agent 13 and a limitation in the purification performance of the combustion gas. was there. That is, in particular,
When used for deploying airbags in the passenger seat, the passenger seat has a different riding environment than the driver's seat, the occupant's posture is not constant, and children may be seated. , For example, an air bag having a large capacity of about 2.5 times that of a conventional air bag for the driver's seat is required. Therefore, the combustion gas capacity of the gas generating agent is large, and the combustion gas of this large capacity can be secured. There has been a demand for an airbag device that can be purified.

Further, the conventional air bag device has a problem that the air bag is rapidly deployed, so that the impact on the occupant is relatively large. The present invention solves the above problems, and an object thereof is to provide an airbag device capable of obtaining a large amount of combustion gas and significantly reducing the impact on the occupant as compared with the conventional airbag device. To do.

[0009]

SUMMARY OF THE INVENTION An airbag device according to the present invention is provided with a first and a second gas generating chamber, in which a gas generating agent is accommodated, on the back side of an airbag accommodating container for accommodating an airbag in a folded state. A container having the containers arranged in parallel, and having a delay mechanism for delaying the ignition timing of the gas generating agent in the second gas generating container after the ignition timing of the gas generating agent in the first gas generating container. Is.

[0010]

In the airbag device of the present invention, first, the gas generating agent in the first gas generating container burns, and thereafter, after a lapse of a predetermined time, the gas generating agent in the second gas generating container burns. .

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an embodiment of an airbag device of the present invention, in which reference numeral 41 denotes an airbag storage container which stores an airbag 43 in a folded state.

On the back side of the air bag container 43,
The first and second gas generation containers 45 and 46 are arranged in parallel. These first and second gas generating containers 4
The flange portions 47 of the reference numerals 5 and 46 are fixed to the back cover 49 of the airbag storage container 41 with bolts 51. The first and second gas generation containers 45 and 46 are configured substantially the same as the gas generation container shown in FIG. 3 except that the igniter is not arranged, and the reference numeral 53 indicates the igniter. The ignition agent arranged in the accommodation position is shown.

Reference numeral 13 indicates a gas generating agent, and reference numeral 17
Indicates an ignition powder. Reference numeral 25 indicates a combustion chamber filter, reference numeral 29 indicates an upper filter, and reference numeral 31 indicates a gas filtration filter. Therefore, in this embodiment, the delay mechanism 55 for making the ignition timing of the gas generating agent 13 in the second gas generating container 46 later than the ignition timing of the gas generating agent 13 in the first gas generating container 45. Are arranged.

The delay mechanism 55 is composed of first and second ignition devices 57 and 58. In this embodiment, the first and second squib 57, 58 includes an RDC.
(Rapid Defragment Cord,
TELDYNE McCORMICK SELPH
Company) is used.

That is, the first and second ignition devices 5
7, 58 are configured by connecting an input member 61 and an output member 63 to each other along a central axis by means of squibs 65 and 66 filled with explosives. The output members 63 of the first and second ignition devices 57 and 58 are in contact with the igniting agent 53 arranged in the first and second gas generating containers 45 and 46, respectively.

On the other hand, the first and second squib 57, 5
The eight input members 61 are connected to the output distributor 69. An electric igniter 71 that is ignited by a signal from the acceleration detection sensor is connected to the output distributor 69. Reference numeral 73 indicates an enhancer that evenly distributes the flame of the electric igniter 71 to the input member 61.

In this embodiment, the burning speed of the first squib 57 is set to be higher than that of the second squib 58. That is, in this embodiment, the squib 6
5 and 66 have the same burning speed, and a delay device (Deley) (not shown) is provided in the middle of the squib 66. Instead of providing the delay device (Deley), the length of the squib 65 may be shorter than the length of the squib 66.

In the air bag device constructed as described above, when a signal from the acceleration sensor is input, electricity is supplied from the harness to the electric igniter 71, and the electric igniter 7 is supplied.
1, the flame is evenly transmitted to the output distributor 71 by the enhancer 73, and the squibs 65 and 66 burn.
Since the squib 66 is provided with a delay device (Deley), first, the flame arrives at the first gas generating container 45, and the gas generating agent 13 burns.

After this, for example, 10 to 20 msec
After a lapse of a predetermined time thereafter, the gas generating agent 13 in the second gas generating container 46 burns. Thus, in the air bag device configured as described above, the first and second gas generation chambers in which the gas generating agent is stored are provided on the back side of the air bag storage container 41 that stores the air bag 43 in the folded state. The containers 45 and 46 are arranged in parallel, and the ignition timing of the gas generating agent 13 in the second gas generating container 46 is set to the first
Since the delay mechanism 55 for delaying the ignition timing of the gas generating agent 13 in the gas generating container 45 of FIG.
The gas generating agent 13 in the gas generating container 45 is burned, and thereafter, for example, after a predetermined time of 10 to 20 msec elapses,
Since the gas generating agent 13 in the second gas generating container 46 is combusted, a large amount of combustion gas can be obtained and the impact on the occupant can be significantly reduced as compared with the conventional case.

That is, in the air bag device configured as described above, since the first and second gas generating containers 45 and 46 are arranged in the air bag storage container 41, a large amount of combustion gas can be easily obtained. It becomes possible. Further, by the delay mechanism 55, for example, 10 to 20 mse from the combustion start timing of the gas generating agent 13 in the first gas generating container 45.
Since the gas generating agent 13 in the second gas generating container 46 is burned after c, it is possible to completely press down the occupant after fixing it to a certain extent, and to significantly reduce the impact on the occupant compared with the conventional one. You can

FIG. 2 shows another embodiment of the airbag device of the present invention. In this embodiment, the delay mechanism 81 is
The combustion chamber 85 of the first gas generating container 83 is connected to the second gas generating container 46 by a squib 87. In this embodiment, the above-mentioned R
DC is used. That is, the squib 87 is formed by connecting the input member 61 and the output member 63 to each other along the central axis by the squib 65 filled with explosive.

The output member 63 of the squib 87 is
Ignition agent 53 arranged in the center of the second gas generation container 46
Is abutted against. On the other hand, the input member 61 of the squib 87
Are connected to the combustion chamber 85 of the first gas generation container 83. In the figure, reference numeral 89 indicates a signal input unit for inputting a signal from the acceleration detection sensor. One end of a harness 91 is connected to the signal input unit 89, and the other end of the harness 91 is connected to the first gas. Igniter 23 of the generating container 83
It is connected to the.

In the air bag device configured as described above, when electricity from the harness 91 is applied to the igniter 23 of the first gas generating container 83, the ignition powder 17 burns,
By this combustion, the gas generating agent 13 in the first gas generating container 83 first burns, and the combustion gas of this gas generating agent 13 flows into the airbag storage container 41 from the gas outlet 93.

On the other hand, when the gas generating agent 13 in the first gas generating container 83 burns, this combustion is transmitted through the input member 61, the squib 65 and the output member 63 of the squib 87, and the second The igniting agent 53 in the gas generating container 46 is burned, so that after the gas generating agent 13 in the first gas generating container 83 is burned, a predetermined time elapses, and then the gas generating agent in the second gas generating container 46. 13 are burned.

The airbag device constructed as described above can also obtain substantially the same effect as that of the embodiment shown in FIG.

[0026]

As described above, in the airbag device of the present invention, the first and second gas generating agents are respectively stored on the back side of the airbag storage container which stores the airbag in a folded state. The gas generating containers are arranged in parallel, and a delay mechanism is provided for making the ignition timing of the gas generating agent in the second gas generating container later than the ignition timing of the gas generating agent in the first gas generating container. Therefore, first, the gas generating agent in the first gas generating container burns, and after a predetermined time elapses, the gas generating agent in the second gas generating container burns. And the impact on the occupant can be significantly reduced compared to the conventional case.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of an airbag device of the present invention.

FIG. 2 is a vertical sectional view showing another embodiment of the airbag device of the present invention.

FIG. 3 is a vertical cross-sectional view showing a conventional air bag deployment gas generator.

[Explanation of symbols]

 41 Airbag Storage Container 43 Airbag 45 First Gas Generation Container 46 Second Gas Generation Container 55 Delay Mechanism

 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Kazuhiro Seki, 1-4-1, Chuo, Wako-shi, Saitama, Honda R & D Co., Ltd. (72) Kenichi Fukuda, 1-4-1, Chuo, Wako, Saitama No. Stock Company Honda Technical Research Institute

Claims (1)

[Claims] 1. A first and a second gas generating container, in which a gas generating agent is stored, are arranged in parallel on the back side of an airbag storing container that stores an airbag in a folded state, and the second An airbag device comprising a delay mechanism for delaying the ignition timing of the gas generating agent in the gas generating container to be later than the ignition timing of the gas generating agent in the first gas generating container.