JP3772484B2 - Airbag device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to airbags of a motor vehicle.
[0002]
[Prior art]
Airbags device for ensuring safety of the passenger at the time of vehicle collision, the inflator as a gas generating source (pressure source), normally have been reduced state, receiving a high pressure gas generated by the inflator and a airbags to be inflated. The inflator is detonated to generate gas pressure at the time of collision, by cushioning the airbags were inflated receiving the gas pressure, and reduce the impact of collision against the occupant.
[0003]
As this type of conventional airbags device, there is JP-A 5-262195 and JP-A No. 3-329556 JP-disclosed techniques.
Technique disclosed in JP-A-5-262195 discloses is provided an inner back grayed inside the airbags, this inner back grayed, an opening for guiding in a direction intersecting the gas from the inflator with respect to the container front Te, this opening, by changing the flow direction of the gas in the vertical or horizontal direction, after rapidly expanded into a desired shape once the vertical or horizontal direction of the airbags, and so as to deploy the back grayed original design shape Is.
[0004]
Further, the technique disclosed in JP-A 3-329556 Patent Publication, a central back grayed portion of airbags, a pair of which is disposed on the left and right of the central back grayed portion constituted by the lateral back grayed portion of these three constitute one another is independent of the back grayed portion space, is provided with a inflator to supply independently and simultaneously gas pressure for each buffer grayed portion.
[0005]
[Problems to be solved by the invention]
However, in the conventional airbags device former mentioned above, the inflator is detonated to generate gas pressure at the time of collision, the receiving gas pressure inner back grayed is first expanded, temporarily lower the airbags through the opening or after deploying the desired shape in the lateral direction, because deploying the back grayed original design shape, in order to quickly expand the airbags must be greater output inflator. Increasing this output, the shock becomes larger when deploying airbags, mounting strength of the airbags is not to be greater, sometimes requiring reinforcement, there is a problem that increase in cost.
[0006]
Further, in the conventional airbags device the latter is connected with the central back grayed portion of the airbags in an inflator, and a pair of side back grayed portion disposed on the left and right of the central back grayed portion in parallel form Te, the time of collision, at the same time a central back grayed portion to deploy a pair of side back grayed portion, so expands evenly receives the output of the inflator, the output characteristics of the inflator sharp rise request immediately after starting This characteristic is remarkable in a hybrid inflator, and in the case of an inflator using sodium azide or the like, it leads to an increase in size. Also, difficult to moderate the output curve immediately after inflation, since the output of it is maintained, in order to join an excessive shock sewing portion and the mounting portion of the airbags, essential strict reinforcement of airbags and the bulk of the airbags increases, there is a problem that increases the cost.
[0007]
The present invention, which was made in view of the above-described problems, and an object, not only as possible out to alleviate the impact of the occupant, much to increase the mounting strength of the airbags An object of the present invention is to provide an airbag device that does not need to be reinforced and does not require reinforcement and does not lead to an increase in cost.
[0008]
[Means for Solving the Problems]
To achieve the above object, airbags device according to the invention of claim 1 forms a plurality of other compartments adjacent to the central compartment and the center of the compartment partitions the interior of the airbags in the partition wall A gas supply port through which gas is supplied from an inflator is provided in the plurality of other compartments, and an opening through which gas flows from the other compartment to the central compartment is provided in the partition wall, and the other from the inflator The central compartment receives the gas supplied to the other compartment, and further, the front portion of the side airbag portion constituting the other compartment is used as the central airbag constituting the central compartment. The front part of the central airbag part is formed in a concave shape by projecting forward from the front part of the part .
[0009]
With this configuration, the inflator is detonated at the time of a collision to generate high-pressure gas, and this high-pressure gas flows into one of the two compartments via the gas supply port and fills the compartment to form an air bag that forms these compartments. with inflating the grayed portion, it flows into the two compartments of the other from the opening provided in the partition wall, inflating the airbags portion forming the other of the two compartments.
[0010]
For example, in only have airbags has one airbags portion, substantially faster rise of the output to expand airbags unit simultaneously generates a high-pressure gas inflator is detonated upon impact, but large impact on the occupant as described above, initially while supplying high pressure gas to one of two compartments inflate airbags part, by so as to inflate the airbags portion by flowing a high pressure gas to the other of the two compartments The rising output can be suppressed, and the impact on the occupant can be mitigated.
[0011]
Further, in order to be possible to suppress the output of the rising, become what shock is small when deploying airbags, without requiring reinforcement it unnecessary to so large a mounting strength of the airbags, cost Will not lead to.
[0012]
Moreover, the high pressure gas is inflated into the central air bag portion from the opening provided in the partition wall portion into the central compartment. At this time, since the inner pressure of this central airbag portion is weaker than that of the left and right side airbag portions, the impact when the occupant hits the airbag can be kept lower than an airbag having only one airbag portion. For this reason, the impact on the occupant can be reduced.
[0013]
In addition, because the front part of the left and right side airbag parts protrudes forward from the front part of the central airbag part, the occupant restraint at the time of an oblique collision causes the left and right side airbag parts to inflate faster . The part that is considered to have the highest contact between the airbag and the occupant is the front part of the central airbag part, but the front part has a concave shape. Ru can be more relaxed.
[0014]
In order to achieve the above object, an air bag device according to the invention of claim 2, in the airbag device according to claim 1, which have at least one outlet to the central airbag unit.
[0015]
With such a configuration, not only can the same effect as the invention of claim 1 described above be obtained, but also when the airbag is restraining the occupant, high-pressure gas is released from the exhaust port, so that the cushion is further cushioned to the occupant by reducing the internal pressure sex is that, well.
[0016]
According to a fourth aspect of the present invention, in the airbag apparatus according to any one of the first to third aspects, the inflator contains a compressed gas.
[0017]
With such a configuration, not only the effects similar to those of the first to third aspects of the invention described above can be achieved, but also the airbag can be operated by the compressed gas built in the inflator.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic perspective view of a deployed state of an embodiment of an airbag apparatus according to the present invention.
[0019]
The airbag device 1 according to the present invention is, for example, disposed inside the instrument panel, above the glove box and on the passenger seat side, or provided in an airbag module mounted on a handle. . The airbag device 1 includes a bag case (not shown), and an airbag 6 and an inflator (not shown) are accommodated in the bag case. The airbag 6 is divided into two partition walls 7 and 8, and is divided into three compartments, that is, a central compartment 9, a left compartment 10 located on the left side of the central compartment 9, and a central compartment. A right side compartment 11 located on the right side of the compartment 9, a central airbag portion 12 forming the central compartment 9, a left side airbag portion 13 forming the left compartment 10, The right side airbag part 14 which forms the right compartment 11 is comprised.
[0020]
The partition wall 7 that separates the central compartment 9 and the left compartment 10 is provided with a plurality of, in the embodiment, two openings 15, and the partition wall that separates the central compartment 9 and the right compartment 11. 8 has a plurality of openings 16 in the embodiment. In addition, gas supply ports 17 and 18 are provided at rear end portions of the left and right side airbag portions 13 and 14. A vent hole 19 serving as an exhaust port is provided on the upper surface of the central airbag portion 12.
[0021]
In the state in which the airbag 6 is inflated to the original design shape, the front portions 13A and 14A of the left and right side airbag portions 13 and 14 are in front of the front portion 12A of the central airbag portion 12. The front portion 12A of the central airbag portion 12 has a convex shape protruding forward.
[0022]
The airbag 6 configured as described above is stored in a bag case in a folded state, and the gas at the rear end portions of the left and right side airbag portions 13 and 14 of the airbag 6 is stored. The supply ports 17 and 18 communicate with a gas outlet (not shown) of the inflator.
[0023]
In the airbag device described above, the inflator is detonated at the time of a collision to generate high-pressure gas, and this high-pressure gas flows from the gas outlet through the gas supply ports 17 and 18 as indicated by arrows in FIG. It flows into the compartments 10 and 11 and fills the compartments 10 and 11 to inflate the left and right side airbag parts 13 and 14, and from the openings 15 and 16 provided in the partition parts 7 and 8, the central compartment 9 The air bag 12 at the center is inflated.
[0024]
For example, as shown in FIG. 4, in the airbag 100 having only one airbag section 101, the output rises so that the airbag section 101 expands almost simultaneously when the inflator is exploded and high pressure gas is generated at the time of collision. The impact on the occupant is large, but as described above, the high pressure gas is first supplied to the left and right compartments 10 and 11 to inflate the left and right side airbag portions 13 and 14, and the high pressure gas is supplied to the central compartment. 9, the air bag 12 at the center is inflated so that the rising output can be suppressed and the impact on the occupant is mitigated.
[0025]
Further, when the capacity of the left and right side airbag portions 13 and 14 is made smaller than that of the central airbag portion 12, the left and right side airbag portions 13 and 14 are inflated very quickly due to the jet effect of high-pressure gas. The central airbag portion 12 is guided to the passenger side (the high-pressure gas jet effect is absorbed by the left and right side airbag portions 13 and 14).
[0026]
The central airbag portion 12 is inflated by high pressure gas flowing into the central compartment 9 from the openings 15 and 16 provided in the partition walls 7 and 8. At this time, since the inner airbag portion 12 has a lower internal pressure than the left and right side airbag portions 13 and 14, the impact at the time when the occupant hits the airbag is applied to the airbag portion 101 shown in FIG. It can be held lower than the single airbag 100. For this reason, the impact on the passenger can be reduced. Further, since the high pressure gas escapes from the vent hole 19 while restraining the occupant, the cushioning performance to the occupant is further improved by the effect of lowering the internal pressure, and the depower action can be performed in two stages.
[0027]
Further, since the front portions 13A and 14A of the left and right side airbag portions 13 and 14 protrude forward from the front surface portion 12A of the central airbag portion 12, the occupant restraint at the time of an oblique collision is restrained from the left and right side portions. The air bag portions 13 and 14 are improved by inflating faster.
[0028]
FIG. 2 shows another embodiment of the airbag apparatus according to the present invention.
In this airbag device 1, the portion considered to have the largest contact between the airbag 6 and the occupant is the front surface portion 12A of the central airbag portion 12, but the front surface portion 12A is formed in a concave shape. The impact when the passenger touches is reduced. In addition, by changing the number, position, and area of the openings 15, 16 provided in the partition walls 7, 8, the amount of high-pressure gas inflow and the inflow location are changed to change the way the central airbag 12 is inflated. The occupant protection performance is improved. Since the other configuration is the same as that of the embodiment shown in FIG. 1, the same reference numerals are given and description thereof is omitted.
[0029]
FIG. 3 shows another embodiment of the airbag apparatus according to the present invention.
The airbag device 1 is a side airbag that is attached to the right side portion of the backrest 21 of the seat device 20. In this airbag device, in a state where the airbag 6 is inflated to the original design shape, the side airbag portions 13 and 14 are L-shaped on the side surface, and the central airbag portion 12 is It is located above and below.
[0030]
Therefore, the inflator is detonated at the time of a collision to generate high-pressure gas, and this high-pressure gas flows into the compartments 10 and 11 from the gas outlet through the gas supply ports 17 and 18 and fills these compartments 10 and 11. The side airbag portions 13 and 14 are inflated into L-shaped side surfaces to guide the central airbag portion 12 and flow into the central compartment 9 from the openings 15 and 16 provided in the partition walls 7 and 8. Then, the central airbag portion 12 is inflated. For this reason, quick bag formation can be performed. Such a side airbag is effective when there is a need to protect a wide part for a small (narrow) module capacity. In addition, you may equip such an airbag apparatus in a door panel, a pillar part, etc. besides equip | installing in a backrest.
[0031]
In addition, although the thing of the structure which is detonated at the time of a collision and generate | occur | produces a high pressure gas was used as said inflator, you may use the inflator which incorporates compressed gas.
[0032]
【The invention's effect】
As described above, according to the airbag device according to the present invention, the inflator is detonated at the time of collision to generate high-pressure gas, and this high-pressure gas flows into one of the two compartments via the gas supply port, The airbag portion that fills this compartment and inflates the airbag portion that forms these compartments, and flows into the other of the two compartments from the opening provided in the partition, and forms the other of the two compartments Inflate.
[0033]
For example, in an airbag having only one airbag portion, when the inflator is detonated at the time of collision and high pressure gas is generated, the output rises quickly so that the airbag portion expands almost simultaneously, and the impact on the occupant is large. As described above, by first supplying high pressure gas to one of the two compartments and inflating the airbag portion, the high pressure gas is caused to flow into the other of the two compartments to inflate the airbag portion. The rising output can be suppressed, and the impact on the occupant can be mitigated.
[0034]
In addition, since it is possible to suppress the output of the rising edge, the shock when deploying the airbag is reduced, and it is not necessary to increase the mounting strength of the airbag so much that it does not require reinforcement, thus increasing costs. Will not lead to.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view of a deployed state of an embodiment of an airbag device according to the present invention.
FIG. 2 is a schematic perspective view of a deployed state of another embodiment of the airbag apparatus according to the present invention.
FIG. 3 is a perspective view of a seat structure when the airbag apparatus according to the present invention is used as a side bag.
FIG. 4 is a schematic perspective view of a deployed state of an airbag device having only one airbag section.
[Explanation of symbols]
6 airbag 7 partition wall portion 8 partition wall portion 9 partition chamber 10 partition chamber 11 partition chamber 12 central airbag portion 13 side airbag portion 14 side airbag portion 15 opening 16 opening 17 gas supply port 18 gas supply port 19 vent hole (exhaust mouth)

Claims (4)

The interior of the airbag is partitioned by a partition wall to form a central compartment and a plurality of other compartments adjacent to the central compartment, and a gas supply port through which gas is supplied from an inflator is provided in the plurality of other compartments. The partition is provided with an opening through which gas flows from the other compartment to the central compartment, and the central compartment receives the gas supplied from the inflator to the other compartment, Furthermore, the front portion of the side airbag portion constituting the other compartment is protruded forward from the front portion of the central airbag portion constituting the central compartment, and the front portion of the central airbag portion is recessed. airbags and wherein the formed into a shape. Airbags according to claim 1 having at least one outlet to the central airbag unit. Airbags according to claim 1 or 2 provided with the side air bag unit to the left and right sides of the central airbag unit. Airbags device according to any one of claims 1 to claim 3 wherein the inflator is a built-in compressed gas.

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