JP2767556B2 - Airbag device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag device which is mounted on the front of a steering wheel or a seat of an automobile or the like to protect an occupant by being operated in an emergency disaster such as a collision accident. It is intended to eliminate the danger of fire and to ensure quick and reliable start-up, safety and cost reduction.

[0002]

2. Description of the Related Art As a method of inflating an airbag,
A method in which a shock caused by a collision is sensed, the gas is electrically captured, and a gas generating agent is gasified by a chemical reaction using explosive power of an explosive by an electric heater (JP-A-50-14703).
In addition to No. 2), a method is known in which the gas pressure of a gas cylinder is used to pierce the gas cylinder sealing plate with a sharp-edged cutting arrow to sense the impact, thereby ejecting the gas into the airbag. I have.

[0003]

However, in the case of using explosives, there is a danger of generating heat due to a chemical reaction and generating a large explosion sound. In the case of using a gas cylinder, the use of sodium azica is the mainstream. Because of this, there is a risk of causing a fire mainly due to decomposition or combustion during the manufacturing process, especially when mixing with an oxidizing agent or during granulation of pharmaceuticals, and also decomposes to Na2O or its derivatives (such as NaOH). There are also handling hazards due to the generation of toxic components.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned various problems in the prior art, and particularly to eliminate the danger of fire and handling in the manufacturing process. Specifically, an airbag body provided with a foldable bag , and a compressed gas seal for inflating the bag, which is attached so that the sealed opening edge faces the inside of the airbag body. A container and means for opening and igniting the compressed gas sealed container, wherein the compressed gas sealed container is composed of a compressed gas sealed container mainly composed of oxygen and a compressed gas sealed container mainly composed of combustion gas. And these two pressures
Compressed gas-tight containers have an air bag
The present invention relates to an airbag device, wherein the airbag devices are attached at positions intersecting with each other in a main body .

[0005]

[0006] The present invention further air airbag body with a freely collapsible bag, the opening edge portion subjected to the sealing
At the place where it was attached to face inside the bag body ,
A compressed gas sealed container for inflating the bag, and means for opening and igniting the compressed gas sealed container, wherein the compressed gas sealed container includes a compressed gas sealed container containing oxygen as a main component and a combustion gas containing main components. And two compressed gas sealed containers.
Face the inside of the cover with air holes, where each opening is formed inside the airbag , and
The respective opening axes are aligned with each other in the airbag body.
The present invention also relates to an airbag device which is attached at a position where the airbag intersects .

[0007]

[0008] The present invention further air airbag body with a freely collapsible bag, the opening edge portion subjected to the sealing
At the place where it was attached to face inside the bag body ,
A compressed gas sealed container for inflating the bag, and means for opening and igniting the compressed gas sealed container, wherein the compressed gas sealed container includes a compressed gas sealed container containing oxygen as a main component and a combustion gas containing main components. And two compressed gas sealed containers.
Face the inside of the cover with air holes, where each opening is formed inside the airbag , and
The respective opening axes are aligned with each other in the airbag body.
At least one or two or more partition walls having a large number of ventilation holes are interposed between the two compressed gas-tight containers in the cover. The present invention also relates to an airbag device characterized by the following.

[0009]

[0010] The present invention further air airbag body with a freely collapsible bag, the opening edge portion subjected to the sealing
At the place where it was attached to face inside the bag body ,
A compressed gas sealed container for inflating the bag, and means for opening and igniting the compressed gas sealed container, wherein the compressed gas sealed container includes a compressed gas sealed container containing oxygen as a main component and a combustion gas containing main components. And two compressed gas sealed containers.
, Each opening direction axis is inside the airbag body.
Mounted at the intersection of each other Te, yet with an incision in the neck of the compressed gas sealed container, the said cut groove to close the opening of the detonator as a means of opening-ignite compressed gas sealed container The present invention also relates to an airbag device characterized by having a piston facing it.

[0011]

When the sensor detects the impact of a vehicle collision and activates the detonator with electric energy, the compressed gas sealed container mainly composed of oxygen and the compressed gas sealed container mainly composed of combustion gas are separated. The sealed openings of the two containers are instantaneously opened, and at the same time, a compressed gas mainly composed of oxygen and a compressed gas mainly composed of combustion gas are ejected and mixed from inside the two containers. It is ignited and burned by the high heat generated by the explosion of the detonator, and generates gas at least several tens times higher than hot H2O or CO2 + H2O to inflate the airbag.

[0012] In this case, the openings of the two compressed gas sealed container, where formed inside the airbag,
Because are to face the inside cover having a vent hole, in addition to the ejected gas is sufficiently stirred in the cover, damaging of the air bag opening of the compressed gas sealed containers splashed is abutted against the inner surface of the cover prevent.

Further, the two compressed gas sealed containers are
The respective opening axes are aligned with each other in the airbag body.
Since the two types of compressed gas to be ejected are agitated immediately because they are mounted at the intersections, the agitation efficiency is further increased.

Further, the openings of the two compressed gas sealed containers are made to face a cover having an air hole formed inside the airbag, and the two compressed gas sealed containers are provided in the cover. In the case where one or two or more partition members having a large number of ventilation holes are interposed between the openings, two kinds of ejected gases pass through the multiple ventilation holes of the partition material. In this case, the stirring efficiency is more complete because the stirring is performed.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The specific contents of the present invention will be described below with reference to FIGS.
To explain based on the embodiment of 2, 1 is an airbag body,
4 is a detonator attached to the cylinder 3 which protrudes in the center of the airbag body 1, 5 is connected to the detonator 4,
Moreover, the pistons 6a and 6b attached to close the opening of the detonator 4 are compressed gas sealed containers,
8 denotes a cover, 10 denotes a foldable airbag, and 11 and 12 denote partition members.

The airbag body 1 has two cylinder mounting holes 2a. 2b is formed at an angle at which the center lines X and Y of the shaft holes intersect inside the cover 8, and the cover 8 is attached to one side thereof. Cylinder mounting hole 2a. 2b has a cut 6c. 6d are formed and screwed into the cover 8 with the neck of the open end facing the inside of the cover 8, and the compressed gas sealed containers 6a. 6b, one of them is filled with oxygen (for example, 7a) and the other is filled with combustion gas (for example, 7b), and the openings are filled with plugs 6e. Seal with 6f.

With respect to the above-mentioned combustion gas, for example, ethane (C2H6), methane (CH4), propane (C3
H8), hydrogen (H), acetylene or the like is used as a compressed gas. In this case, the chemical reaction formula when methane (CH4) is used is: CH4 (methane) + 2O2 (oxygen) → CO2 (carbon dioxide) + 2H2O (water), and the required ratio of methane gas to oxygen is 1: 2. Become.

The chemical reaction formula when hydrogen (H) is used is 2H2 (hydrogen) + O2 (oxygen) → H2O (water), and the required ratio of hydrogen gas to oxygen is 2: 1.
Depending on the type of combustion gas used in this way, the required ratio of combustion gas and oxygen may be different.In such a case, for convenience as a gas amount adjusting means, the gas filling pressure is increased or decreased, for example, If methane (CH4) is used, oxygen is 100 kg / square centimeter for 50 kg / square centimeter of methane gas, and if hydrogen (H) is used, oxygen is 50 kg / square centimeter for 100 kg / square centimeter of hydrogen.

By providing a charging pressure difference in this way, a tentative balance between the two can be controlled, but even in this case, the emission ratio of the two is inevitably somewhat unstable. Therefore, in order to further improve the required ratio and mixing accuracy of combustion gas and oxygen and stabilize the emission ratio of both, the size of the compressed gas container and the gas pressure are made equal, and replenished as a shortage. By filling the container on the side with an inert gas such as helium or argon, both can be completely burned in accordance with the above-described chemical reaction formula to improve the gas generation efficiency.

The inert gas, such as helium or argon, filled as described above is heated by the combustion gas so that its volume expands to about 10 times, and a synergistic effect upon inflation of the airbag. Can exert a functional effect.

Further, the detonating device 4 is electrically connected to an impact sensor (not shown) so that the detonating device 4 is electrically detonated at the same time as impact detection accompanying an emergency such as a vehicle collision.
The piston 5 is loosely fitted into the cylinder 3 and projects into the cover 11 of the airbag body 1 with the detonation of the detonating device 4.
Cuts 6c. In the compressed gas sealed containers 6a and 6b. 6d to engage with the opening plug 6e. It is configured such that the tip including 6f can be instantly bounced off.

Further, the cover 8 has a through hole 9 at its periphery.
Are formed at equal intervals, and are screwed onto the outer peripheral portion of the airbag body 1, and furthermore, outwardly extending flanges 8a are formed on the outer peripheral edge thereof, and the flange 8a is foldable as described above. Is attached. Further, partition materials 11 and 12
Has a large number of ventilation holes 11a and 12a
A pair of compressed gas sealed containers 6a. 6b, between the partition members 11 and 12, and between the partition members 12 and
And the outer peripheral wall of the cover 8 are mounted in a circular shape so as to interpose a fixed space therebetween. Note that, in this case, the partition material may be configured with only one of the partition materials 11 and 12.

With the above configuration, when an impact caused by a vehicle collision or the like is sensed, the detonator 4 is electrically detonated, whereby the piston 5 in the cylinder 3 projects into the body cover 8 of the airbag, At this time, a pair of compressed gas sealed containers 6a. 6b each cut 6c. 6d is pushed up so strongly that the plug 6e. The neck portion on which 6f is applied is instantaneously bounced off and opened, and oxygen in one compressed gas sealed container and combustion gas in the other compressed gas sealed container are simultaneously ejected to mix the two. , Detonator 4
The mixed gas is ignited and burned by the generated high heat to produce a high-temperature H2O or a reaction gas of several tens times the volume of CO2 + H2O, which is ejected outward from the through hole 9 of the cover 8 to generate air. The bag 10 is inflated.

The removed open end of the compressed gas sealed container is blown off by the pressing force of the internal pressure gas, but is guarded by the cover 8 and does not adversely affect the airbag 10 itself. In this case, the partition member 11 and / or the partition member 12
In the case where the gas is provided, when the ejected oxygen and the combustion gas pass through these many through holes, the oxygen and the combustion gas are more thoroughly stirred to increase the combustion efficiency and, consequently, the gas generation amount. This makes it possible to reduce the size of the compressed gas sealed container or to reduce the content gas amount.

In the above embodiment, a pair of compressed gas sealed containers 6a. As means for removing the opening 6b, a single cylinder 3 closing the opening of the detonator 4 is used to perform the removal by the piston 5 sliding in the cylinder 3. Compressed gas sealed container 6a. The number of cylinders and pistons corresponding to the number of 6b may be provided.

[0026]

As described above, the present invention inflates an airbag body provided with a foldable bag and a bag which is attached so that the sealed opening edge faces the inside of the airbag body. And a means for opening and igniting the compressed gas sealed container, wherein the compressed gas sealed container is a compressed gas sealed container mainly composed of oxygen and a compressed gas sealed container mainly composed of combustion gas. the Rukoto provided with two gas sealed container, as in the conventional particular risk without any fire caused by decomposition or combustion of the main production process, such as during and formulation of granulation mixed with an oxidizing agent, yet decomposed Te Na2O or its derivatives entirely Ku risks in handling for you it nor produce toxic components such (such as NaOH), yet the two mentioned above,
Compressed gas-sealed containers have an opening
That are attached to each other in the
The oxygen and the combustion gas are immediately agitated.
The mixture is stirred and mixed, and the gas mixing efficiency is significantly improved.
Functionality can be further enhanced.

Also, the openings of two compressed gas sealed containers, a compressed gas sealed container mainly containing oxygen and a compressed gas sealed container mainly containing combustion gas, are formed inside the airbag. In the case of facing inside the cover having the ventilation hole, the mixing of the oxygen and the combustion gas becomes good,
Further, even when the opening of the sealed container is flipped off, there is no direct contact with the inner surface of the airbag, so that the airbag is not damaged.

[0028]

Further, in the case where one or more partition members having a large number of ventilation holes are interposed between the openings of the two compressed gas sealed containers in the cover of the airbag body, In addition, the mixing efficiency of the oxygen and the combustion gas is further improved, and the reliability of the airbag can be further improved.

As means for opening the opening of the compressed gas sealed container, a cut is made in the neck of each compressed gas sealed container, and the tip corner of the piston faces the cut groove. To make the piston rush toward the cover direction,
Compared to the conventional method of simply piercing the sealing plate of a gas cylinder with a sharpened tip by impact detection to pierce the sealing plate of the gas cylinder to blow out gas and sending it into the airbag, the force for opening the cylinder is As a result, the gas cylinder opening area is remarkably large, resulting in excellent instantaneous gas generation capability, rapid airbag inflation speed, extremely high reliability, and safety and cost reduction. The contribution is great.

[Brief description of the drawings]

FIG. 1 is a sectional view of an airbag device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a state where the airbag device of FIG. 1 is operated and inflated.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Airbag main body 2 Cylinder mounting hole 3 Cylinder 4 Initiating device 5 Piston 6a Compressed gas sealed container 6b Compressed gas sealed container 6c Cut 6d Cut 6e Plug 6f Plug 7 Compressed gas 8 Cover 9 Through hole 10 Airbag 11 Partition material 12 Partition wall material

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-278554 (JP, A) JP-A-6-144147 (JP, A) JP-A-50-147032 (JP, A) 105025 (JP, A) JP-A-47-40732 (JP, A) JP-A-7-156741 (JP, A) JP-A 50-38026 (JP, U) JP-A 60-93553 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) B60R 21/16-21/32

Claims (4)

(57) [Claims] 1. An airbag body having a foldable bag , and a compressed gas sealed container for inflating the bag, wherein the airbag body is attached so that a sealed opening edge is exposed in the airbag body. And means for opening and igniting the compressed gas sealed container. The compressed gas sealed container includes two components, a compressed gas sealed container mainly composed of oxygen and a compressed gas sealed container mainly composed of combustion gas. door and is equipped with
In the meantime, the two compressed gas sealed containers have respective openings.
Where the direction axes intersect each other in the airbag body
An airbag device which is attached to a device. 2. An airbag body having a foldable bag , and a compressed gas sealed container for inflating the bag, wherein the airbag body is mounted so that a sealed opening edge is exposed in the airbag body. And means for opening and igniting the compressed gas sealed container. The compressed gas sealed container includes two components, a compressed gas sealed container mainly composed of oxygen and a compressed gas sealed container mainly composed of combustion gas. door and is equipped with
In the meantime, the two compressed gas sealed containers have respective openings.
With a ventilation hole where the airbag is formed inside the airbag.
And the respective opening direction axes
The airbag device is mounted at a position where they cross each other . 3. An airbag body having a foldable bag , and a compressed gas sealed container for inflating the bag, wherein the airbag body is mounted so that a sealed opening edge is exposed inside the airbag body. And means for opening and igniting the compressed gas sealed container. The compressed gas sealed container includes two components, a compressed gas sealed container mainly composed of oxygen and a compressed gas sealed container mainly composed of combustion gas. door and is equipped with
In the meantime, the two compressed gas sealed containers have respective openings.
With a ventilation hole where the airbag is formed inside the airbag.
And the respective opening direction axes
Are positioned in the airbag body where they cross each other.
The above two compressed gases are attached inside the cover.
A large number of ventilation holes were formed between the opening and the sealed container.
An airbag device comprising one or two or more partition members interposed therebetween . 4. An airbag body having a foldable bag , and a compressed gas-sealed container for inflating the bag, wherein the airbag body is attached so that a sealed opening edge is exposed inside the airbag body. And means for opening and igniting the compressed gas sealed container. The compressed gas sealed container includes two components, a compressed gas sealed container mainly composed of oxygen and a compressed gas sealed container mainly composed of combustion gas. door and is equipped with
In the meantime, the two compressed gas sealed containers have respective openings.
Where the direction axes intersect each other in the airbag body
And the neck of each compressed gas sealed container
And cut into the cut groove.
Detonator as a means to open and ignite gas-tight containers
That the piston closing the opening of the
Characteristic airbag device.