JP2001294108A - Air bag device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To receive a pedestrian at a desired position. SOLUTION: This air bag device 1 for a vehicle is installed in the upper part of a front bumper 3 of a car body 2, and an air bag body 10 is developed nearly all over the width of the bumper 3. The device is provided with a bag stabilizing means 25 for stabilizing the air bag body 10 in a covering state over the bumper 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle airbag device capable of protecting pedestrians.

[0002]

2. Description of the Related Art Some vehicles such as automobiles are provided with an airbag device as an emergency safety means. This airbag device is usually provided in a passenger compartment to protect an occupant. However, in recent years, airbag devices designed to protect pedestrians have been proposed.

The pedestrian protection airbag device is configured such that when an impact force of a predetermined value or more is applied to a vehicle body, the airbag device is folded and housed in a housing disposed in an upper part of a bumper at a front portion of the vehicle body. The bag body expands toward the front of the vehicle body by the pressure of the pressurized gas from the inflator and deploys over substantially the entire width of the bumper, thereby receiving and protecting the pedestrian.

[0004]

However, in such an airbag device for protecting a pedestrian, the swelled airbag body floats upward due to wind pressure generated by the running of the vehicle, and the pedestrian is prevented from moving to a desired position. There is a possibility that it will not be received at the position.

The airbag body is inflated to a maximum just before receiving the pedestrian, and it is most desirable for the protection function to be released immediately after the pedestrian is received. A vent hole is provided in the bag body. And this vent hole
In order to prevent the exhaust from hitting a pedestrian, it is necessary to provide the airbag on the lower surface side of the airbag body, for example. However, if the vent hole is provided on the lower surface side of the airbag main body, the exhaust air may squirt downward and the airbag main body may float upward, and the pedestrian may not be able to be received at a desired position.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle airbag device which can solve the above-mentioned problems and can receive a pedestrian at a desired position.

[0007]

According to a first aspect of the present invention, an airbag body is provided above a bumper at a front portion of a vehicle body and extends over substantially the entire width of the bumper. An airbag device for a vehicle which is deployed is characterized in that bag stabilizing means for stabilizing the airbag body in a state of being covered with the bumper is provided.

According to the first aspect of the present invention, the bag stabilizing means is provided to stabilize the airbag body in a state where the airbag body covers the bumper. At a desired position.

According to the invention described in claim 2, in the vehicle airbag device, the airbag device is provided above a bumper at a front portion of a vehicle body, and the airbag body is deployed over substantially the entire width of the bumper. On the lower surface side of the bag body, a vent hole for adjusting the internal pressure of the airbag body is provided, and exhaust control means capable of preventing exhaust gas from rushing downward is provided in the vent hole. I have.

According to the second aspect of the present invention, the exhaust from the vent hole is urged downward by the exhaust control means provided in the vent hole formed on the lower surface side of the airbag body. Is prevented from rising, so that the airbag body does not float upward.
A pedestrian can be received at a desired position.

According to a third aspect of the present invention, in the vehicle airbag device, the airbag device is provided above a bumper at a front portion of the vehicle body, and the airbag body is deployed over substantially the entire width of the bumper. A vent hole for adjusting the internal pressure of the airbag body is provided at a position on the lower surface of the bag body outside the pressure gas introduction port with respect to the vehicle width direction and on the front side away from the bumper. It is characterized by:

According to the third aspect of the present invention, the vent hole is provided on the lower surface of the airbag body at a position outside the pressure gas inlet with respect to the vehicle width direction. This makes it difficult for the pressurized gas to escape during the deployment of the airbag body, and the airbag body can be deployed quickly.

[0013] Further, by providing the vent hole at a front portion of the lower surface of the airbag main body away from the bumper, it is possible to prevent the vent hole from being closed by the bumper, and to ensure the pressure. Gas can be exhausted.

According to a fourth aspect of the present invention, in the vehicle airbag device, the airbag body is provided over a bumper at a front portion of the vehicle body, and the airbag body is deployed over substantially the entire width of the bumper. A vent hole for adjusting the internal pressure of the airbag body is provided at a position adjacent to the pressure gas introduction port on the rear side of the bag body, and the vent hole is closed with a patch. Is connected by a tether so that the patch can be peeled off via the tether when the airbag body is inflated to the maximum.

According to the fourth aspect of the present invention, the vent hole is provided at a position adjacent to the pressure gas inlet on the rear surface side of the airbag main body, so that the exhaust gas is supplied to the pedestrian. Hit can be prevented.

Further, since the patch is peeled off via the tether when the airbag body is inflated to the maximum and the vent hole is opened, the pressure gas does not escape during the deployment of the airbag body. The airbag body can be deployed the fastest.

[0017]

First Embodiment A first embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 to FIG. 5 show a first embodiment of the present invention.

First, the structure will be described. As shown in FIGS. 1 and 2, the airbag device 1 for protecting a pedestrian is
Left and right headlamps 4 and 4 above the front bumper 3
It is provided in the position between.

The airbag device 1 has a lid portion 6 attached to the above position so as to be continuous with the bonnet 5,
An airbag module having a lid attachment hook 8 disposed on the back side of this lid portion 6 (rearward in the vehicle front-rear direction) and engageable with a leg portion 7 projecting rearward from the back side of the lid portion 6. 9 is provided. Then, in order to deploy the airbag body 10 over substantially the entire width of the bumper 3,
As shown in FIG. 3, two existing airbag modules 9 for protecting the occupants are arranged in series in the vehicle width direction, and a guide 1 is provided.
1 is connected.

Each of the airbag modules 9 has a base member 13 which can accommodate a cylindrical inflator 12 for ejecting a pressurized gas and has a substantially inverted Ω shape when viewed from the side. The base member 13 is fastened and fixed to a vehicle-side member such as a stay (not shown) using a fastening member such as a bolt.

Further, the airbag module 9 has a bag storage container 14 for storing the airbag body 10 in a folded state.

As shown in FIG. 4, the airbag body 10 includes upper and lower base cloths 15, 16 and upper and lower base cloths 15, 1, 1.
6 and a side cloth 17 sewn between the peripheral edges. Two pressure gas inlets 18 are formed on the rear side of the side cloth 17 so as to correspond to the two airbag modules 9, 9, and each pressure gas inlet 18 has a metal retainer 19. Is installed. The airbag main body 10 is fixed to the bag storage container 14 via the retainer 19.

On the back surface of the lid portion 6, for example,
Cleavage line 20 having a substantially H shape in rear view (overall illustration omitted)
Are formed. Then, the tear line 20 is ruptured by the pressing force when the airbag body 10 is inflated, and the portions forming the tear line 20 around the root of the leg 7 open in the directions away from each other (open double). As a result, a bulging opening is formed (actually, it is formed when opened).

In the first embodiment, bag stabilizing means 25 is provided for stabilizing the airbag body 10 while covering the airbag body 10 with the bumper 3.

Specifically, as shown in FIG. 5, front and rear connecting means 26 such as a tether for connecting the front and rear surfaces of the airbag body 10 are provided as the bag stabilizing means 25. The front-rear connection means 26 has a length a,
6 is shorter than the length b of the airbag body 10 in the vehicle longitudinal direction when the airbag body 10 is inflated to the maximum (a <b), so that the concave portion 27 is formed on the tip end side of the airbag body 10. .

Next, the operation of the first embodiment will be described.

When the inflator 12 operates, a pressurized gas is ejected from the inflator 12 and the pressurized gas is introduced into the airbag body 10. Airbag body 10
Expands with the introduction of the pressurized gas, and by the pressure of the expansion, first, a part of the lid portion 6 is cleaved along the H-shaped cleavage line 20 to form a bulging opening, and at the same time, the bulging opening is formed. The airbag body 10 bulges toward the front of the vehicle body from the opening and is deployed over substantially the entire width of the bumper 3. Thereby, the airbag body 10 receives and protects the pedestrian.

At this time, as shown by an imaginary line in FIG. 5, if the inflated airbag body 10 rises upward as shown by the arrow due to the wind pressure of the wind c generated by the running of the vehicle, the pedestrian is disturbed. There is a possibility that it cannot be received at a desired position.

Therefore, in the first embodiment, the bag stabilizing means 25 is provided to stabilize the airbag body 10 in a state of being covered with the bumper 3 so that the pedestrian can be reliably received at a desired position. I have.

That is, by providing front-rear connection means 26 such as a short tether for connecting the front surface and the rear surface of the airbag body 10 as the bag stabilizing means 25, the front end side of the airbag body 10 which is inflated to the maximum is provided. The concave portion 27 is formed in the recess. When receiving the wind c, the airbag main body 10 having the concave portion 27 on the front end side is pressed against the front part of the vehicle body 2, so that the behavior of the airbag main body 10 with the bumper 3 covered is stabilized.

In the first embodiment, a plurality of existing passenger-seat airbag modules 9 are provided (two in the figure).
By arranging in series in the vehicle width direction, an airbag device for pedestrian protection in which the airbag body is deployed over substantially the entire width of the bumper 3 can be obtained at low cost, but is not limited to this. Alternatively, only one long axis airbag module may be used.

[0033]

[Modification] FIG. 6 shows a first modification of the first embodiment.
By making the size of the upper base cloth 15a in the vehicle front-rear direction shorter than the size of the lower base cloth 16b in the vehicle front-rear direction, the bulging shape of the airbag body 10 is covered by the bumper 3.

FIG. 7 shows a second modification of the first embodiment, in which a pressure gas inlet 18a is provided as a bag stabilizing means 25 at a position deviated upward on the rear side of the side cloth 17, and The main body 10 is bulged forward and obliquely downward.

FIGS. 8 and 9 show a third modification of the first embodiment. As the bag stabilizing means 25, a pocket 30 having an opening 29 on the front side is provided on the lower surface side of the airbag body 10. FIG. It is a thing. Thus, by providing the pocket 30 on the lower surface side of the airbag body 10, the wind c is received by the pocket 30 and inflated, so that the airbag body 10 moves to the side (downward) where the pocket 30 is provided. Since the airbag body 10 receives the heading force, the behavior of the airbag body 10 is stabilized while the bumper 3 covers the bumper 3. By providing similar pockets 30a on the left and right sides of the airbag body 10, the airbag body 10 is provided.
To the left and right can be suppressed.

The other parts of each modified example have the same configuration as the first embodiment, and the same operation and effect can be obtained.

[0037]

Second Embodiment FIGS. 10 and 11 show a second embodiment of the present invention. The same or equivalent parts as those in the first embodiment will be described with the same reference numerals.

First, the structure will be described. In the second embodiment, a vent hole 31 for adjusting the internal pressure of the airbag body 10 is provided on the lower surface side of the airbag body 10.
And an exhaust control means capable of preventing exhaust gas from rushing downward into the vent hole 31.

Specifically, a base cloth 32 having high air permeability (coarse) is attached to the vent hole 31 as an exhaust control means.

Next, the operation of the second embodiment will be described.

As described above, by providing the vent hole 31 on the lower surface side of the airbag body 10, it is possible to prevent the exhaust from hitting the pedestrian.

Exhaust from the vent hole 31 is diffused and gradually exhausted by exhaust control means such as a highly permeable base cloth 32 provided in the vent hole 31 formed on the lower surface side of the airbag body 10. As a result, the exhaust gas is prevented from vigorously squirting downward, and the airbag body 1
There is no lifting above zero, and it becomes possible to catch the pedestrian at a desired position.

The other parts are the same as those in the first embodiment.
, And the same operation and effect can be obtained.

[0044]

[Modification] FIGS. 12 and 13 show a first modification of the second embodiment.
An exhaust storage portion 35 having a large capacity for storing exhaust gas from the vent hole 31 is provided so as to cover the entire lower surface of the exhaust hole.

As described above, by providing the large-volume exhaust accommodating portion 35 on the lower surface side of the airbag main body 10, as shown in FIG. Exhaust vent hole 3
1 escapes to the lower exhaust accommodating section 35.
Thereby, the airbag main body 10 and the exhaust storage section 35 are covered with the bumper 3 in an ideal state, and the exhaust is prevented from leaking to the outside and hitting a pedestrian. Ejection is prevented. As a result, the airbag body 10 is not lifted upward, and the pedestrian can be received at a desired position.

FIGS. 14 and 15 show a second modification of the second embodiment, in which a vent hole 31 is used as exhaust control means.
Is provided with a cloth nozzle portion 36 for sewing exhaust air toward the center and rearward of the airbag body 10 by sewing. By doing so, the exhaust from the vent hole 31 can be directed to the center and the rear of the airbag body 10 by the nozzle portion 36, so that the airbag body 10 is prevented from rising upward and the pedestrian is prevented. It becomes possible to receive at a desired position.

The other parts of each modified example have the same configuration as the second embodiment, and the same operation and effect can be obtained.

[0048]

Third Embodiment FIG. 16 shows a third embodiment of the present invention. The same or equivalent parts as those in the first and second embodiments will be described with the same reference numerals.

In the third embodiment, the base fabric 16 on the lower side of the airbag body 10 is located outside the pressure gas inlet 18 with respect to the vehicle width direction and the bumper 3.
A vent hole 31 for adjusting the internal pressure of the airbag body 10 is provided at a position 41 on the front side away from the airbag.

Next, the operation of the third embodiment will be described.

As described above, the vent hole 31 is provided on the lower surface of the airbag body 10 outside the pressure gas inlet 18 with respect to the vehicle width direction (that is, the pressure gas inlet 1).
By providing the airbag body 10 at the position 41 (a position away from the airbag body 8), it becomes difficult for the pressure gas to escape during the deployment of the airbag body 10, and the airbag body 10 can be deployed quickly.

Further, by providing the vent hole 31 at a position 41 on the front side of the lower surface of the airbag body 10 distant from the bumper 3, the vent hole 31 can be prevented from being closed by the bumper 3, thereby ensuring reliable operation. Pressure gas can be exhausted.

The other parts have the same configuration as those of the first and second embodiments, and the same operation and effect can be obtained.

[0054]

Fourth Embodiment FIG. 17 shows a fourth embodiment of the present invention. The same or equivalent parts as those in the first to third embodiments will be described with the same reference numerals.

In the fourth embodiment, a vent hole 31a for adjusting the internal pressure of the airbag body 10 is provided at a position adjacent to the pressure gas inlet 18 on the rear side of the airbag body 10 and a vent hole 31a is provided. The hole 31a is closed with a patch 45, and the patch 45 and the front portion of the airbag body 10 are connected with a connecting cloth such as a tether 46. When the airbag body 10 is inflated to the maximum, the patch is inserted through the tether 46. 45 is peelable. That is, vent hole 3
A patch 45 is sewn to the portion 1a so that the patch 45 is broken (raised) when pulled by the tether 46. Note that the patch 45 and the tether 46 may be integrated.

Next, the operation of the fourth embodiment will be described.

By providing the vent hole 31a at a position adjacent to the pressure gas inlet 18 on the rear side of the airbag body 10, it is possible to prevent the exhaust from hitting the pedestrian. The exhaust from the vent hole 31a is
Guide 11 for connecting between two airbag modules 9
Through the hood.

When the airbag body 10 is inflated to the maximum, the patch 45 is peeled off via the tether 46 and the vent hole 31a is opened, so that the pressurized gas is released during the deployment of the airbag body 10. Disappears,
The airbag body 10 can be deployed the earliest.

The other parts are the same as those in the first embodiment.
It has the same configuration as that of Nos. 1 to 3, and can obtain the same operation and effect.

Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and even if there is a design change or the like without departing from the gist of the present invention. Included in this invention. For example, combinations other than those described in the above embodiments are also possible.

[0061]

As described above, according to the first aspect of the present invention, a pedestrian is provided by providing a bag stabilizing means so that the airbag body is stabilized while being covered by the bumper. At a desired position.

According to the second aspect of the present invention, the exhaust control means provided in the vent hole formed on the lower surface side of the airbag body prevents the exhaust from the vent hole from being vigorously blown downward. The airbag body is no longer lifted upward, and it is possible to catch the pedestrian at a desired position.

According to the third aspect of the present invention, the vent hole is provided on the lower surface of the airbag body at a position outside the pressure gas introduction port with respect to the vehicle width direction, so that the airbag body can be expanded during the deployment. The pressurized gas is less likely to escape, and the airbag body can be quickly deployed.

Further, by providing the vent hole on the front side of the lower surface of the airbag body away from the bumper, it is possible to prevent the vent hole from being closed by the bumper and to exhaust the pressurized gas without fail. be able to.

According to the fourth aspect of the present invention, the vent can be prevented from hitting a pedestrian by providing the vent hole at a position adjacent to the pressure gas inlet on the rear surface side of the airbag body.

Further, since the patch is peeled through the tether and the vent hole is opened when the airbag main body is inflated to the maximum, the pressure gas does not escape during the deployment of the airbag main body. The practically useful effect that the airbag body can be deployed can be exerted.

[Brief description of the drawings]

FIG. 1 is a perspective view of a front portion of a vehicle including an airbag device according to Embodiment 1 of the present invention.

FIG. 2 is a side sectional view of FIG. 1;

FIG. 3 is an exploded perspective view of the airbag device of FIG.

FIG. 4 is a perspective view showing a state where the airbag body of FIG. 1 is inflated to the maximum.

FIG. 5 is a side view showing a main part of the first embodiment.

FIG. 6 is a side view similar to FIG. 5 of a first modification of the first embodiment.

FIG. 7 is a rear view of an airbag body according to a second modification of the first embodiment.

FIG. 8 is a front view of an airbag body according to a third modification of the first embodiment.

9 is a side view similar to FIG. 5, showing the operating state of FIG. 8;

FIG. 10 is a perspective view of the airbag body according to the second embodiment of the present invention as viewed from the bottom surface side.

FIG. 11 is a partially enlarged sectional view of FIG. 10;

FIG. 12 is a rear view of an airbag body according to a first modification of the second embodiment.

FIG. 13 is a side view similar to FIG. 5, showing the operating state of FIG. 12;

FIG. 14 is a perspective view of an airbag body according to a second modification of the second embodiment as viewed from the bottom side.

FIG. 15 is a partially enlarged sectional view of FIG. 14;

FIG. 16 is a perspective view of the airbag body according to the third embodiment as viewed from the bottom surface side.

FIG. 17 is a perspective view of the airbag body according to the fourth embodiment as viewed from the rear side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Airbag apparatus 2 Body 3 Bumper 10 Airbag main body 18 Pressure gas introduction port 25 Bag stabilization means 31 Vent hole Exhaust control means 32 Base cloth 35 Exhaust accommodating part 36 Nozzle part 45 Patch 46 Tether

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroyuki Okuyama 5-24-15 Minamidai, Nakano-ku, Tokyo Inside Calso Nic Kansei Corporation (72) Inventor Katsumi Yamada 5-24-15 Minamidai, Nakano-ku, Tokyo Calso Inside Nick Kansei Corporation (72) Inventor Norihito Okuda 5-24-15 Minamidai, Nakano-ku, Tokyo Calso Nick Kansei Corporation (72) Inventor Tsutomu Kawashima 5-24-15 Minamidai, Nakano-ku, Tokyo Calsonic F term in Kansei Corporation (reference) 3D054 AA12 AA30 BB30 CC04 CC11 CC15 CC16 CC21 EE14 FF20

Claims (4)

[Claims] 1. An airbag device for a vehicle, which is provided above a bumper at a front portion of a vehicle body and is configured to deploy an airbag body over substantially the entire width of the bumper, wherein the airbag body is covered by the bumper. An airbag device for a vehicle, further comprising a bag stabilizing means for stabilizing the airbag in a retracted state. 2. An airbag device for a vehicle, which is provided above a bumper at a front portion of a vehicle body and is configured to deploy an airbag body over substantially the entire width of the bumper. An airbag device for a vehicle, comprising: a vent hole for adjusting the internal pressure of a bag body; and exhaust control means capable of preventing exhaust gas from vigorously jetting downward in the vent hole. 3. An airbag device for a vehicle, which is provided above a bumper at a front portion of a vehicle body and is configured to deploy an airbag body over substantially the entire width of the bumper. A vent hole for adjusting the internal pressure of the airbag body is provided outside the pressure gas inlet with respect to the direction and at a position on the front side away from the bumper. Bag device. 4. An airbag apparatus for a vehicle, which is provided above a bumper at a front portion of a vehicle body and is configured to deploy an airbag body over substantially the entire width of the bumper. A vent hole for adjusting the internal pressure of the airbag body is provided at a position adjacent to the introduction port, the vent hole is closed with a patch, and the patch and the front portion of the airbag body are connected with a tether. An airbag device for a vehicle, wherein the patch is configured to be peelable via a tether when the airbag body is inflated to the maximum.