JP2001171451A - Air bag device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a vehicle from going under the other vehicle or the like and to prevent the damage of a cabin to protect an occupant in the collision of the vehicle by expanding a large-sized air bag of high strength in an instant with a small quantity of gas, using an air bag device equipped in a low pressure developed state. SOLUTION: This air bag device equipped in the vehicle 17 has the air bag 14 installed in a low pressure expanded state in a hood 12 at the front part of a vehicle body. The air bag 14 is enclosed in an air bag container and installed together with an air bag control device 16. An air bag sensor 11a is embedded in a front bumper 11 and sends a collision acceleration signal to the air bag control device 16 which generates gas to pressurize and inflate the air bag 14, and evacuates according to the collision acceleration to absorb the impact of a collision to thereby protect the cabin 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention protects a cabin from sneaking in from a collision of an automobile or damage to a front part thereof,
Further, the present invention relates to an airbag device for protecting an occupant.

[0002]

2. Description of the Related Art Heretofore, there have been known airbags that are mounted in the interior of an automobile and protect an occupant from the impact of a collision in the event of a collision, and those that deploy on a hood to protect pedestrians.

[0003] The vehicle body has a structure that absorbs the impact of a collision and reduces the impact on the occupant.

[0004]

In the event of a collision with a large vehicle, a small vehicle is not limited to the damage to the front part. If the impact is large, the small car may be damaged by sneaking into the cabin. It can be difficult to protect.

[0005] Further, there is a thought that the impact is absorbed by the airbag outside the vehicle. However, the condition of the airbag which has the performance of extinguishing the impact of the collision is such a condition that the strength is excellent and the volume is large. Problems remain with the location of the filling airbag module.

[0006] In order to deploy the airbag, a large amount of gas is required, a large inflator is required, and the reaction force at the time of deploying the airbag is extremely large.

[0007]

As a means for solving the above-mentioned problems, the present invention provides an airbag in a low-pressure deployed state in a bonnet in front of a cabin in a front side of a vehicle, or in a midship vehicle in a midship vehicle. Immediately after the collision is detected by the airbag sensor installed on the front bumper, the airbag control device is activated to obtain sufficient pressure with a small amount of gas and exhaust pressure is reduced according to the collision acceleration.
Absorbs the energy of the collision.

In a large vehicle, low pressure deployed airbags are disposed on both sides of the front of the vehicle, and the airbag is pressurized immediately after the collision to fill the gap between the vehicle and the road surface. To prevent small vehicles from sneaking in.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS.

FIG. 1 shows a first embodiment of a vehicle airbag device according to the present invention. The vehicle airbag device mounted on a vehicle 17 is deployed in a bonnet 12 at a front portion of a vehicle body at a low pressure. An airbag 14 is provided.

Referring to FIG. 2, the vehicle airbag device mounted on the vehicle 27 has airbags 24a and 24b arranged on both sides at the front of the vehicle body in a low pressure deployed state.

In the vehicle airbag device, the airbags 14, 24a, 24b are stored in an airbag storage container (not shown), and are disposed together with an inflator for inflating and inflating the airbag.

Airbag sensors 11a and 21a are embedded in the front bumpers 11 and 21, respectively.

The airbag sensors 11a and 21a send a collision acceleration signal to the airbag control devices 16, 26a and 26b, and generate gas with an inflator to pressurize the airbags 14, 24a and 24b.

The airbags 14, 24a, 24b absorb the impact of the collision by reducing the pressure of the exhaust gas, and the cabin 13, 23,
To protect.

FIG. 3 shows an embodiment in which the vehicle airbag device of the present invention is mounted on both outer sides of the vehicle at the front part of the vehicle body. The vehicle airbag device mounted on the vehicle 37 includes an airbag 34a, The airbag control devices 36a and 36b for pressurizing and inflating the airbag 34b are provided.

An airbag sensor 31a is embedded in the front bumper 31.

The airbag sensor 31a sends a collision acceleration signal to the airbag control devices 36a and 36b, and generates gas with an inflator, thereby causing the airbags 34a and 3a to generate a gas.
4b is pressurized.

The airbag 34a mounted on the vehicle 37,
34b, when pressurized, the airbag storage containers 35a, 35
5b is disposed so as to break and expand in the road surface direction.

The airbags 14, 24a, 24b, 34
Each of a and 34b has a tube structure (not shown) to maintain the pressure of air.

[0021]

As described above, the airbag device for a vehicle according to the present invention does not require a large amount of gas at the time of deployment by keeping the pressure of the deployed airbag at the minimum necessary pressure. The inflator is small and can be used.

As a result, even a large and high-strength vehicle airbag can be deployed with a small device, and the speed of deployment and the reduction in cost associated with the miniaturization of the device are realized.

Also, in the event of a collision with a large vehicle, the small vehicle is not limited to damage to the front part, but also to the cabin,
In some cases, it is difficult to protect an occupant by using an in-vehicle airbag, but by installing the vehicle airbag device of the present invention, the safety is greatly improved.

With respect to problems such as sneaking in, a large vehicle is equipped with the airbag device for a vehicle,
The greatly inflated airbag eliminates the gap between the vehicle and the road surface, prevents small vehicles from sneaking in, absorbs shocks, and prevents damage from reaching the cabin.

Further, by arranging the rear side of the large vehicle on the both sides, it is possible to prevent the vehicle from getting into the rear.

[0026]

[Brief description of the drawings]

FIG. 1 is an explanatory view of a vehicle airbag device in which an airbag in a low-pressure deployed state is installed in a hood in front of a vehicle.

FIG. 2 is an explanatory diagram showing an example of a vehicle airbag device in which airbags in a low-pressure deployed state are arranged on both front sides of a vehicle.

FIG. 3 is a perspective view showing an example of a vehicle airbag device in which airbags in a low-pressure deployed state are arranged on both front outer sides of a vehicle.

[Description of Signs] 11 Front bumper 11a Airbag sensor 12 Bonnet 13 Cabin 14 Airbag 16 Airbag control device 17 Vehicle 21 Front bumper 21a Airbag sensor 22 Bonnet 23 Cabins 24a, 24b Airbag 26a, 26b Airbag control device 27 Vehicle 31 Front bumper 31a Airbag sensor 34a, 34b Airbag 35a, 35b Airbag storage container 36a, 36b Airbag control device 37 Vehicle

Claims (1)

[Claims] 1. An airbag is installed in a low pressure deployed state in a front hood of a vehicle or on both front sides thereof, an airbag control device is operated immediately after a collision, and after a small amount of gas is pressurized, exhaust pressure is reduced. An airbag device for a vehicle, which absorbs the impact of a collision.