JPH07186870A - Air bag device for automobile - Google Patents

Abstract

PURPOSE:To protect a passenger at a rear seat from the rear end collision of a vehicle. CONSTITUTION:An air bag device for an automobile is mounted on a rear package tray 13 disposed between a rear seat 11 and a rear window 12 and operation is controlled along with deceleration detecting operation of a deceleration sensor 8 disposed at the mounting portion of a rear bumper 7. Thereby, when a vehicle is collided from the rear, an air bag device 1 is operated through detection of deceleration of the deceleration sensor 8 and an air bag body 3 injected with nitrogen gas is caused to protect the head part of a passenger A at a rear seat.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air bag system for an automobile, which protects an occupant from a collision by inflating an air bag body when the vehicle collides.

[0002]

2. Description of the Related Art In recent years, an automobile has been equipped with an airbag device for ensuring the safety of passengers in the event of a collision from the front of the vehicle. Of this airbag device,
The driver's seat is usually provided on the steering wheel, and the passenger's seat is provided in the glove box of the instrument panel. In the case of a collision from the front of the vehicle, the above-described airbag device inflates the airbag main body 21 between the front seat occupant B and the instrument panel 20 as shown in FIG. The restraint of the person B is further improved to ensure safety.

[0003]

However, the above-mentioned conventional airbag device is provided in front of the front seat such as a steering wheel or an instrument panel, and is provided only to a front seat occupant in a collision from the front of the vehicle. Is configured to protect the car from collision. For this reason, when the vehicle collides from the rear, the impact force may hit the rear seat occupant against the rear window or cause whipping, and the window glass broken by the impact force may enter the inside of the vehicle. There is a problem in that the passengers are scattered and endanger the rear seat passengers. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an airbag device for a vehicle that protects a passenger in the rear seat from a collision from the rear of the vehicle.

[0004]

In order to solve the above-mentioned problems, the vehicle airbag apparatus according to claim 1 of the present invention inflates the airbag body in accordance with the vehicle collision detection operation by the collision detection means. The following measures are taken in an automobile airbag device that protects an occupant from a collision. That is, the airbag device is arranged at the rear position of the rear seat so as to be inflatable toward the head of the rear seat occupant. In order to solve the above problems, an automobile airbag device according to a second aspect of the present invention is provided.
The following measures are taken in the above-described automobile airbag device.

That is, the airbag device is mounted on a rear board as an interior member arranged between the rear seat and the rear window. In order to solve the above-mentioned problems, an automobile airbag device according to a third aspect of the present invention is the automobile airbag device according to the second aspect.
The following measures are taken. That is, the airbag main body of the airbag device is restricted in its inflating direction to the front side by the rear window during its inflating operation, and supports the back head of the rear seat occupant in a completely inflated state. Further, in order to solve the above-mentioned problems, the vehicle airbag apparatus according to the fourth aspect of the invention adopts the following means in the vehicle airbag apparatus according to the third aspect.

That is, the airbag body is formed in a concave shape so that the supporting portion for supporting the back head of the rear seat occupant wraps around the head of the rear seat occupant.

[0007]

According to the above-mentioned structure, when the vehicle collides from the rear, the collision detection means detects the vehicle collision, and accordingly, the airbag body of the airbag device is located at the rear position of the rear seat. Bulges toward the head of the rear passenger. Therefore, at the time of a collision from the rear of the vehicle, the rear seat occupant moved to the rear of the vehicle by its inertial force is supported by the elastic airbag main body at the rear position of the rear seat, and is protected from the collision from the rear of the vehicle. . Also,
According to the configuration of claim 2, the airbag device is mounted on the rear board as an interior member disposed between the rear seat and the rear window, so that the rear seat rear portion is provided without hindering the view from the rear window. It is possible to make effective use of unused space.

According to the third aspect of the present invention, the bulging direction of the airbag body is restricted to the front side by the rear window, and the back head of the passenger seating the rear seat is supported by the airbag body. In the event of a collision from the rear seat passenger, the inertial force (impact force) that the rear seat passenger receives relative to the vehicle relative to the vehicle can be supported by the rear window via the airbag body, so the rear seat passenger can be reliably supported. It can be retained in the airbag body. Also,
According to the configuration of claim 4, since the concave support portion formed in the airbag body wraps around the head of the rear seat occupant, the rear seat occupant is thrown obliquely due to the impact force at the time of a vehicle collision. Therefore, the holding power of the rear seat occupant by the airbag body can be further enhanced.

[0009]

As described above, the airbag device for a vehicle according to claim 1 of the present invention is arranged at the rear position of the rear seat in order to protect the occupant of the rear seat from a collision from the rear of the vehicle. Is. As a result, in the event of a collision from the rear of the vehicle, the airbag body can be inflated at the rear position of the rear seat, so that it is possible to prevent a rear seat occupant from colliding with the rear window.
It is possible to prevent scattering of the window glass broken in the vehicle due to the impact force at the time of the vehicle collision, and as a result, it is possible to protect the rear seat occupant from the collision from the rear of the vehicle.

According to a second aspect of the present invention, there is provided an automobile airbag device according to the first aspect, which is mounted on a rear board as an interior member arranged between a rear seat and a rear window. It has a structure. As a result, it is possible to arrange the airbag device according to claim 1 without hindering the view from the rear window and effectively utilizing the unused space behind the rear seat. .
According to a third aspect of the present invention, in the vehicle airbag system according to the second aspect, the airbag body of the airbag system is inflated by a rear window in a frontward direction when the airbag body is inflated. It is configured to support the occipital region of the rear seat occupant in a regulated and completely expanded state.

Thus, in the event of a collision from the rear of the vehicle, the inertial force (impact force) that the rear seat occupant receives relative to the vehicle rearward can be supported by the rear window via the airbag body. Therefore, there is an effect that the passenger in the rear seat can be surely held in the airbag body. According to a fourth aspect of the present invention, there is provided an automobile airbag apparatus according to the third aspect, wherein the airbag body has a support portion for supporting a rear head of a rear seat passenger, which is a head portion of the rear seat passenger. The structure is formed in a concave shape so as to wrap it. As a result, the recessed support portion formed in the airbag body wraps around the head of the rear seat occupant, so that the rear seat occupant will not be thrown out in an oblique direction due to the impact force at the time of a vehicle collision, and the air bag will be further improved. The effect that the holding power of the rear seat occupant by the bag body can be enhanced is obtained.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The following will describe one embodiment of the present invention with reference to FIGS. 1 and 2. As shown in FIG. 1, an automobile airbag apparatus 1 according to the present embodiment is mounted on a rear package tray (rear board) 13 as an interior member arranged between a rear seat 11 and a rear window 12 in a vehicle compartment. As shown in FIG. 2, the configuration is composed of an assembly of an airbag module 2, a lid 5 and an inflator 6. The airbag module 2 includes a nylon airbag body 3 and a module case 4 that stores the airbag body 3 in a folded state. The airbag body 3 has a concave support portion 3a at the tip thereof in a completely inflated state shown by the alternate long and short dash line in FIG. The module case 4 is formed of a metal plate, and an opening 4a for mounting the lid 5 is provided on the upper surface thereof, while an opening 4b for mounting the inflator 6 is provided on the bottom surface thereof. .

In the lid 5, an elastic member made of foamed resin such as urethane is used as the opening 4a of the module case 4.
Is formed in a flat plate shape, and a thin portion 5a is formed in a groove shape at a portion corresponding to the storage position of the airbag body 3. As a result, in the lid 5, the thin-walled portion 5a is torn along with the swelling operation of the airbag body 3 which will be described later, and the module case 4 is opened to the passenger compartment side.
The thickness of the thin portion 5a of the lid 5 is changed according to the formation portion thereof, and the opening operation of the module case 4 is performed in the double-door open state. The inflator 6 is an electric nitrogen gas generator including a gas generating agent, a transfer agent, and an igniter. The end of the airbag body 3 is attached to the upper surface of the inflator 6. It is attached to the opening 4b of the module case 4.

As shown in FIG. 1, the inflator 6 is connected with a deceleration sensor (collision detecting means) 8 arranged at a mounting portion of the rear bumper 7 via a harness 9. As a result, the inflator 6 is controlled in operation according to the deceleration detecting operation of the deceleration sensor 8 described later, and injects nitrogen gas into the airbag body 3. An operation process of the airbag device 1 in the above-described configuration in a collision from the rear of the vehicle will be described below with reference to FIG. When the vehicle collides from the rear, first, an impact force from the rear of the vehicle is applied to the rear bumper 7. As a result, the rear bumper 7 is crushed and moves forward relative to the vehicle. And
Based on such movement of the rear bumper 7, the deceleration sensor 8 detects deceleration (collision from the rear), and controls the operation of the inflator 6. The above deceleration sensor 8
The deceleration is detected by the deceleration value that is considered dangerous when an impact force from the rear of the vehicle is applied to the rear seat occupant A.

Next, when the inflator 6 receives the control signal from the deceleration sensor 8, the ignition device is energized to cause an explosion, and the flame is propagated to the gas generating agent through the transfer agent. Then, nitrogen gas is generated by such combustion of the gas generating agent, and this is injected into the airbag body 3 in the module case 4. The airbag body 3 into which the nitrogen gas has been injected has a thin wall portion 5 of the lid 5 as the airbag body 3 inflates.
Tear a and spread it from the module case 4 to the passenger compartment side.
Further, the airbag body 3 which continues to inflate is regulated by the rear window 12 from the upper side to the front side, and in a completely inflated state filled with nitrogen gas, the rear seat occupant A in the vehicle interior space in front of the rear window 12 It is arranged with a certain elasticity to protect the head.

As described above, the airbag body 3 interposed between the head of the rear seat occupant A and the rear window 12 has a concave support portion 3a formed at the tip thereof.
Is in a state in which the head of passenger A of the rear seat is wrapped.
As described above, the airbag device 1 for a vehicle according to the present embodiment is mounted on the rear package tray 13 arranged between the rear seat 11 and the rear window 12 and arranged on the mounting portion of the rear bumper 7. The operation is controlled according to the deceleration detecting operation of the deceleration sensor 8 provided. Therefore, when the vehicle collides from the rear, the airbag device 1 is actuated by the deceleration detection of the deceleration sensor 8 and the airbag body 3 injecting the nitrogen gas causes the head portion of the rear seat occupant A to move. It is designed to protect you.

Further, the airbag body 3 is in a state of being inflated between the head of the rear seat occupant A and the rear window 12 in a completely inflated state, and the supporting portion of the tip portion thereof. 3a is in a state of enclosing the head of the rear seat passenger A. Therefore, in the case of a collision from the rear of the vehicle, the inertial force (impact force) that the rear seat occupant A receives relative to the vehicle rearward can be supported by the rear window 12 via the airbag body 3. For,
The passenger A in the rear seat can be reliably held. Further, since the support portion 3a of the airbag body 3 wraps around the head of the rear seat occupant A, the rear seat occupant A is not thrown out in an oblique direction due to the impact force, and the rear seat occupant A holding force is further improved. Is increasing.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an airbag device for an automobile according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view showing the airbag device.

FIG. 3 is an explanatory view showing an airbag device for a vehicle in a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Airbag device 3 ... Airbag body 3a ... Support part 8 ... Deceleration sensor 11 ... Rear seat 12 ... Rear window 13 ... Rear package tray A ... Rear seat passenger

Claims (4)

[Claims] 1. An airbag device for a vehicle, wherein an airbag body is inflated to protect an occupant from a collision in accordance with a vehicle collision detection operation by a collision detection means, wherein the airbag device is mounted on a rear seat behind a rear seat. An airbag device for an automobile, which is arranged so as to be inflatable toward a person's head. 2. The airbag device for an automobile according to claim 1, wherein the airbag device is mounted on a rear board as an interior member arranged between a rear seat and a rear window. 3. The airbag body of the airbag device comprises:
The bulge direction is restricted to the front side by the rear window during the bulge operation, and the rear head of the rear seat occupant is supported in a completely bulge state.
The automobile airbag device described. 4. The vehicle body according to claim 3, wherein the airbag main body is formed in a concave shape so that a supporting portion for supporting a back head of a rear seat occupant encloses a head of the rear seat occupant. Airbag device.