JP5010459B2 - Airbag device - Google Patents

Description

  The present invention relates to an airbag device that is mounted on various vehicles and inflates and deploys when a vehicle collision occurs.

Today, airbag devices are installed in various vehicles, such as driver airbags, passenger airbags, side airbags, side curtain airbags, knee airbags, and exterior airbags. The target collision modes are also diversified.
There are various types of inflation gas for inflating an air bag, such as nitrogen, helium, and argon. A method of opening the bag and releasing it into an airbag outside the pressure vessel is used.
The conventional example includes an expansion drive device and a gas outlet tube connected to the expansion drive device in an airtight state, and has a discharge portion for discharging the gas generated by the expansion drive device when necessary, and the discharge portion Includes attachment means, the gas outlet tube having engagement means, the engagement means engaging in engagement with the attachment means and positioning the gas outlet tube axially relative to the attachment means. An assembly for use in a vehicle occupant restraint system adapted to be secured to the inflating drive, wherein the attachment means has a flank perpendicular to the longitudinal axis of the discharge section. A circumferential groove having a shape, the flank being disposed on the side of the groove facing the gas outlet tube, and the gas outlet tube being engaged with the groove by a plastic deformation portion The assembly used in the restraint system of a vehicle occupant, characterized in bets (e.g., see Patent Document 1) are present.
Also, a curtain airbag body provided with a gas guide for introducing gas into ducts formed in the upper part of a plurality of chambers, and gas is ejected only from the axial direction fixed to the gas guide of the curtain airbag body. In a curtain airbag module equipped with an inflator, an auxiliary gas ejection port is provided at a point-symmetrical position with respect to the gas ejection port of the gas guide provided with a gas ejection port in one direction orthogonal to the axis of the inflator. The auxiliary gas ejection port is closed with a gas guide cover so that the gas from the inflator is ejected from the gas ejection port that should be used, and the gas guide cover is configured to be a gas generating agent inside the inflator. When the gas generating agent spontaneously ignites due to thermal deformation at a temperature lower than the temperature at which it spontaneously ignites, Gas discharge of the curtain airbag, characterized in that formed in the material to allow ejected gas from the mouth module structure (e.g., see Patent Document 2) are present.
Japanese Patent Laid-Open No. 10-217901 (refer to the claims section, detailed description section, and FIGS. 1 to 7) JP 2007-210370 A (refer to the claims section, detailed description section, and FIGS. 1 to 4)

In the prior art, a tube (pipe) may be used in order to guide the gas output of the inflator to a location away from the mounting position of the inflator. For example, in the case of a long curtain airbag module that extends from the upper end root of the front pillar to the rear pillar through the roof side portion beyond the upper end root of the center pillar, for example, when the gas introduction portion of the airbag is arranged in the rear pillar portion, the center pillar portion In some cases, the gas introduction part is arranged from the top root to the roof, but it is not possible to secure an inflator installation location adjacent to the gas introduction part so that a commonly used rod-like inflator can be directly connected to the gas introduction part. is there.
Therefore, there is one that solves the above-mentioned layout problem by connecting a gas introduction part and an inflator installed at a location away from it using a tube that is thinner than the inflator body diameter ( Patent Document 1).
On the other hand, there is a problem in transportation for an airbag module that uses such a tube to eject gas in one direction.
In other words, when an air bag module is assembled and imported overseas and carried into a domestic body assembly line, or when an air bag module assembled domestically is supplied to a foreign vehicle production line, it is in transit, especially in shipping. There is a problem that gas blows out of the inflator under high temperature such as fire, and the box packed with the air bag module moves greatly in the warehouse. There is.
Therefore, there is a gas guide cover as shown in Patent Document 2 formed of a resin material or a woven fabric, and the gas guide cover is thermally deformed to open the auxiliary gas outlet before the gas generating agent spontaneously ignites. ing.
However, there is a problem that it is necessary to prepare a dedicated gas guide cover.

A first invention of the present invention for solving the above-mentioned problems is an airbag device as described in claim 1, and is as follows.
An airbag device having a tubular gas introduction portion, and an air bag device having one end inserted into the gas introduction portion, and a conduit for inflating the airbag by supplying airbag inflation gas from the other end portion to the distal end portion And, at one end of the conduit, there are an axial jet opening that opens in the axial direction of the gas introduction section, and a plurality of radial jet openings that open in the radial direction intersecting the axial direction toward the tube wall of the gas introduction section. The plurality of radial jets are configured such that each gas thrust simultaneously generates axial and radial gas jets that substantially balance the total gas thrust in the radial direction of the multiple radial jets .

A second invention of the present invention for solving the above-mentioned problems is an airbag device as described in claim 2, which is as follows.
In addition to the first aspect of the invention, the axial outlet and the plurality of radial outlets are configured such that each gas thrust substantially balances all the gas thrusts in the axial direction of all the outlets.

A third invention of the present invention for solving the above-described problems is an airbag apparatus as described in claim 3, which is as follows.
In addition to the invention described in claim 1 or 2, a tubular passage is formed between the peripheral wall of the gas introduction portion and the outer peripheral surface of the conduit, and the gas at the radial outlet passes through the tubular passage to the airbag. It is a configuration to be introduced.

Since the airbag apparatus according to the present invention has the configuration as described above, the following effects are achieved.
(1) The air bag module and the packed box are not moved greatly under high temperature such as a fire.
(2) Since no other members are used, the problem can be solved without incurring special costs.

An airbag device having a tubular gas introduction portion, and an air bag device having one end inserted into the gas introduction portion, and a conduit for inflating the airbag by supplying airbag inflation gas from the other end portion to the distal end portion And, at one end of the conduit, there are an axial jet opening that opens in the axial direction of the gas introduction section, and a plurality of radial jet openings that open in the radial direction intersecting the axial direction toward the tube wall of the gas introduction section. The plurality of radial outlets is an airbag apparatus in which each gas thrust simultaneously generates axial and radial gas ejections that substantially balance the total gas thrust in the radial direction of the plurality of radial outlets.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a front view showing a deployed state of a curtain airbag employing the airbag device of the present invention, and FIG. 2 is a schematic diagram of a pipe inserted into a gas introducing portion of the curtain airbag employing the airbag device of the present invention. FIG. 3 is a schematic perspective view showing a tip portion of a pipe inserted into a gas introducing portion of a curtain airbag employing the airbag apparatus of the present invention, and FIG. 4 is an airbag of the present invention. FIG. 5 is a schematic perspective view showing a second embodiment of a pipe inserted into the gas introduction part of the airbag device of the present invention, and FIG. 6 is a diagram showing the thrust of the present invention and the prior art. FIG. 7 is a schematic perspective view showing a third embodiment of the pipe inserted into the gas introducing portion of the airbag apparatus, and FIG. 7 is a schematic partial view showing the fourth embodiment of the pipe inserted into the gas introducing portion of the airbag apparatus of the present invention. A cross-sectional perspective view, FIG. Some schematic showing a fifth embodiment of a pipe to be inserted into the gas inlet of the airbag device is a sectional perspective view.

First, an embodiment of the airbag apparatus of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a deployed state of an embodiment of a curtain airbag employing the airbag device of the present invention. The curtain airbag device has an inflator mounting bracket 7 on the side of the rear pillar 14 of the roof side rail 11. The curtain airbag 1 is attached to the roof side rail 11 by the attachment piece 2 through the pipe, and the gas is ejected from the inflator 7 when the vehicle collides, and the gas passes through the pipe 8 and the curtain air from the gas introduction unit 18. From the rear pillar 14 side of the bag 1, the center pillar 13 and the front puller 12 are sequentially discharged through the air chamber inlets 5 to the air chamber 3 to expand and inflate the curtain airbag 1. Reference numeral 19 denotes a seat belt.

Next, the pipe 8 to be inserted into the gas introduction part 18 of the airbag apparatus, which is a feature of the present invention, will be described in detail with reference to FIGS.
As shown in FIG. 2, the pipe 8 inserted into the gas introduction part 18 of the airbag apparatus of the present invention has a front port 21 at one pipe tip 20 and a plurality of side ports 22 on the left and right sides (this embodiment) (Two).
Further, the gas introduction part 18 has substantially the same diameter as the diameter of the pipe 8 extending from the inflator 6, and a thermosetting silicone rubber part 32 is formed in the base fabric panels 101 and 102 inside the gas introduction part 18. Then, the base fabric panels 101 and 102 are bonded to guide the flow of gas generated when the vehicle collides. A seal portion 31 is formed in the vicinity of the gas introduction portion 18 so that the gas can be easily guided.
If necessary, sewing may be performed after bonding.
And the curtain airbag 1 main body which has the gas introduction part 18 and the pipe 8 are united by the hose band 30 etc. after pipe insertion.

Here, based on FIG. 3, the flow of gas generated from the inflator 6 at the time of a vehicle collision will be described.
The airbag device of the present invention is configured such that gas ejected from the inflator 6 at the time of a vehicle collision passes through the pipe 8 and is ejected from the front port 21 and the side port 22 provided at the pipe tip.
Thus, unlike the prior art airbag device in which gas is ejected only from the hole corresponding to the front port 21, gas is ejected from three directions, so that more gas is instantaneously introduced into the curtain airbag 1. It can be ejected.
Further, by ejecting gas from a plurality of holes as in the airbag apparatus of the present invention, if the thrust generated laterally is 100 in the prior art, it can be reduced by about 60% to be about 40 ( Resolves the problem that even if a gas is blown out of an inflator during a high temperature such as a fire during transportation of a ship during transportation, the box packed with the airbag module will move greatly in the warehouse. To do.

Next, another embodiment of the present invention will be described with reference to FIGS.
FIG. 5 shows a second embodiment of the pipe inserted into the gas introduction part of the airbag apparatus of the present invention, which is provided with three side ports 22, and the one shown in FIG. This is a third embodiment of the pipe to be inserted into the gas introduction part of the airbag device, and four side ports 22 are provided, and the diameter of the pipe 8 is made narrower as the front port 21 faces the front port as shown in the figure. It is possible to reduce the thrust by ejecting the gas thrust from the side port 22 as well.
FIG. 7 shows a fourth embodiment of the pipe inserted into the gas introducing portion of the airbag apparatus of the present invention, and the side port 22 is provided in the direction opposite to the opening direction of the front port 21. The inclined surface 81 is formed by recessing the peripheral surface of the pipe 8, and the side port 22 is formed there. In the example shown, the peripheral surface is inclined by about 45 ° and three side ports are provided. However, the number of ports, the opening area, and the inclination angle are the best so that the thrust of the gas ejected forward can be canceled out. The design can be appropriately selected.
8 shows that the inner diameter of the gas introduction portion 18 is about 1.8 times the outer diameter of the pipe 8, and the airbag expands as A → B in the figure only with the front port 21. What is to be done is that by providing the side port 22, the gas introduction part 18 is expanded from the position closer to the hose band 30 at an early stage, and a gas flow path is secured. That is, when the airbag is inflated, it can be expanded in a rod shape from the portion pressed by the hose band 30.

  It can be used for various airbags of various automobiles.

It is a front view which shows the deployment state of the curtain airbag which employ | adopted the airbag apparatus of this invention. It is a schematic perspective view which shows the principal part of the pipe inserted in the gas introduction part of the curtain airbag which employ | adopted the airbag apparatus of this invention. It is a schematic longitudinal cross-sectional view which shows the front-end | tip part of the pipe inserted in the gas introduction part of the curtain airbag which employ | adopted the airbag apparatus of this invention. It is a graph which shows the thrust at the time of the gas ejection of the airbag apparatus of this invention and a prior art. It is a schematic perspective view which shows the 2nd Example of the pipe inserted in the gas introduction part of the airbag apparatus of this invention. It is a schematic perspective view which shows the 3rd Example of the pipe inserted in the gas introduction part of the airbag apparatus of this invention. It is a general | schematic partial cross-section perspective view which shows the 4th Example of the pipe inserted in the gas introduction part of the airbag apparatus of this invention. It is a general | schematic partial cross-section perspective view which shows the 5th Example of the pipe inserted in the gas introduction part of the airbag apparatus of this invention.

DESCRIPTION OF SYMBOLS 1 .... Curtain airbag 2 .... Installation piece 3 .... Air chamber 5 .... Air chamber inlet 6 .... Inflator 7 .... Inflator mounting bracket 8 .... Pipe 11 .... Roof side rail 12 .... Front pillar 13 .... Center pillar
14 .... Rear pillar 18 .... Gas introduction part
19 .... Seat belt 20 .... Pipe tip
21 ... Front port 22 ... Side port
30 ... Hose band 31 ... Seal
32 ... Thermosetting silicone rubber part 81 ... Inclined surface
101 ··· Base fabric panel 102 ··· Base fabric panel

Claims (3)

An airbag device having a tubular gas introduction portion, and an air bag device having one end inserted into the gas introduction portion, and a conduit for inflating the airbag by supplying airbag inflation gas from the other end portion to the distal end portion And, at one end of the conduit, there are an axial jet opening that opens in the axial direction of the gas introduction section, and a plurality of radial jet openings that open in the radial direction intersecting the axial direction toward the tube wall of the gas introduction section. The plurality of radial jets are provided so that each gas thrust simultaneously generates axial and radial gas jets that substantially balance the total gas thrust in the radial direction of the multiple radial jets. Bag device. 2. The airbag device according to claim 1, wherein the axial thrust outlet and the plurality of radial ejection outlets substantially equilibrate the total gas thrust in the axial direction of all the ejection openings. 3. A tubular passage is formed between the peripheral wall of the gas introducing portion and the outer peripheral surface of the conduit, and the gas at the radial outlet is introduced into the airbag through the tubular passage. The airbag apparatus as described in.

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