JPH0688521B2 - Airbag device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an airbag device that protects an occupant in the event of a collision of a vehicle or the like. More specifically, the airbag device is provided in a rear pillar of a vehicle interior. A base plate mounted on the fixed side, a gas generator fixed to the base plate, an airbag body mounted so as to bulge due to the operation of the gas generator, and an airbag cover for housing the airbag body. The present invention relates to an airbag device.

[Conventional technology]

BACKGROUND ART Conventionally, an airbag device has been known as a protection device for passengers of a vehicle or the like. As this airbag device,
No. 56-43890, No. 59-155257, No. 1
-117957 and Japanese Utility Model Laid-Open No. 64-7053 exist.

Generally, in an airbag device, a gas generator is fixed to a base plate attached to a fixed side such as an instrument panel or a steering wheel facing the front of the occupant in order to protect the occupant in the case of a collision in the front-rear direction of a vehicle or the like. , The airbag main body having the gas inlet is fixed by the bolts and nuts via the retainer, and when the gas generator operates under the specified conditions, the gas instantaneously flows into the airbag main body, It is designed to instantly swell the bag body.

However, such an airbag device arranged on the front side of the occupant cannot exert the occupant protection effect on the behavior of the occupant in the left-right direction when it is collided with the left and right door sides of the vehicle. In order to protect an occupant at the time of a collision between the left and right doors, conventionally, as described in Japanese Utility Model Laid-Open No. 1-117957, a device in which an airbag device is provided in the armrests of the left and right doors or a real opening is used. As disclosed in Japanese Patent Laid-Open No. 64-7053, there has been proposed a device in which an airbag device is provided on the rear shelf and the airbag main body is developed into an L-shape from this.

[Problems to be Solved by the Invention]

However, in the conventional air bag system, air bags on the left and right sides of the rear seat are not affected when a side collision occurs due to the air bag system installed on the left and right door sides of the vehicle compartment or the air bag system installed on the rear shelf. By operating the bag device, it is possible to prevent the occupant from colliding with the side surface of the passenger compartment such as the door glass.
When the airbag device is installed in the armrest of the door, since the bulging of the airbag body requires a considerable area to protect the head of the occupant, it is necessary to configure the armrest itself to have a large volume. In addition, since it is necessary to receive the occupant's forearm on the upper surface of the armrest, it is necessary to increase the mechanical strength of this upper surface portion and to arrange a cushioning material, etc. There is a drawback that it is difficult to bulge instantly, and when an airbag device is installed on the rear shelf, the airbag body is deployed in an L-shape, so that it is instantly L-shaped at the time of a side collision. It is difficult to deploy, and the volume of the airbag body when deployed is large, so the internal pressure of the passenger compartment rises significantly and damages the ears of passengers. There is a disadvantage of such risk is that.

An object of the present invention is to provide an airbag device that can be instantly deployed, can suppress an increase in vehicle interior pressure, and can also have a pillow function.

[Means for Solving the Problems]

The present invention has been made in view of the above-described problems, and is provided in a rear pillar of a vehicle compartment, a base plate attached to a fixed side, a gas generator fixed to the base plate, and an operation of the gas generator. In an airbag device including an airbag body mounted so as to bulge, and an airbag cover for housing the airbag body, the airbag cover includes a pair of side surface plates and a pair of side surface plates. The airbag cover includes a front plate portion connecting side edges and a shield member formed at a front end surrounded by the pair of side plate portions and the front plate portion and opening when the airbag body is deployed. The airbag cover is formed in the same shape as the pillow arranged in the rear pillar, the airbag cover is arranged in the rear pillar, and the shielding member at the front end of the airbag cover is projected into the vehicle interior. The airbag cover is fixed to the outside of the front plate portion, characterized in that it is formed in the pillow.

[Action]

According to the present invention, the airbag cover of the airbag device, which is disposed in the rear pillar of the vehicle compartment and protects the occupant in the event of a side collision, is formed in the same shape as the pillow disposed in the rear pillar of the vehicle, and the airbag is provided. Since a shielding member that opens when the airbag body is deployed is arranged at the front end of the cover,
By arranging this airbag device on the rear pillar that is the pillow mounting portion, the pillow that receives the head of the occupant by the front plate portion of the airbag cover can also be used.
Moreover, since no force acts on the front portion of the pillow, it is possible to form the shielding member at the front portion with a low strength such as a thin portion, and there is no hindrance to the bulging of the airbag body at the time of a side collision. The air bag main body can be instantly expanded in a straight line without being given, and the occupant's head can be reliably protected.

〔Example〕

Hereinafter, an airbag device according to the present invention will be described in detail with reference to the drawings.

1 to 3 show the outline of an embodiment of an airbag device according to the present invention. In these drawings, the case of a rear seat in this embodiment will be described.

First, as is clear from FIG. 1, a rear seat, which is generally designated by reference numeral 1, is composed of a seat cushion 2, a seat back 3 and the like, which are provided upright on the rear end side. Rear pillars 4 are provided on both sides of the rear seat 1, and an airbag device 5 also serving as a pillow is provided at a position of the rear seat 1 facing the head of the seated person. There is.

As shown in FIG. 2, the airbag device 5 has a flat base plate 6, a gas generator 7 fixed to the base plate by fixing means such as bolts and nuts, and gas from the gas generator 7 flows in. A folded airbag main body 9 having a gas injection port 8 and an airbag cover 10 for accommodating them are provided.

The airbag body 9 is formed by laminating a synthetic resin sheet on a cloth or the like, and is formed in such a shape that it is deployed forward so as to cover the door glass 14a of the door 14.

Further, a through hole 6a is formed in the substantially central portion of the base plate 6, the front end side of the gas generator 7 is projected forward from the through hole 6a, and the gas ejection port 7a of the gas generator 7 is blown out from the gas injection port 8 by air. It is inserted inside the bag body 9. Further, the airbag cover 10 is made of a soft resin material such as polyethylene.

As shown in FIGS. 2 and 3, the airbag cover 10 includes a pair of inverted triangular side plate portions 10a, a front plate portion 10b connecting right side edges of the pair of side plate portions 10a, and a pair of side plate portions 10a. A shielding member 10c formed of a thin portion formed at a front end portion surrounded by the side surface plate portion 10a and the front surface plate portion 10b, and a pair of side surface plate portions 1
It is formed by a flange portion 6b of the base plate 6 and an opposing flange portion 10d which extends outward from the left side edge of 0a.

When the airbag body 9 swells, the shielding member 10c breaks and opens, and the airbag body 9 swells.

Here, is the inner diameter of the gas ejection port 7a facing in the bulging direction of the airbag body 9 of the gas generator 7, that is, the front side, larger than the inner diameters of the gas ejection ports 7a of the other parts, for example? , Or the particle size of pellets serving as a gas generation source, which are filled in the gas generator 7 facing the bulging direction of the airbag body 9, is smaller than the particle size of pellets filled in other parts. By selecting one, the surface area of the pellet can be increased to increase the gas generation amount, and the gas ejection amount in the inflation direction of the airbag body 9 can be increased as compared with other portions. it can.

The number of gas generators 7 may be two or more.

Then, with the base plate 6 and the airbag cover 10 in contact with their flange portions 6b and 10d,
The shielding member 10c of the airbag cover 10 is inserted so as to project into the vehicle compartment from the through hole 4 provided in the rear pillar inner 4a, and the flange portions 6b and 10d are fixed to the rear pillar inner 4a by fixing means such as bolts and nuts. Has been done.

Then, the side trim 15 is arranged on the vehicle compartment side surface of the rear pillar inner 4a so as to cover the bolts, and the cushion material 16 and the skin material 17 are attached to the surface of the front plate portion 10b of the airbag cover 10. , A pillow 13 that receives the head of the seated person.

In such a configuration, when the occupant sits on the rear seat 1, the head of the occupant faces the pillow 13.
The head can be held on the pillow 13. In this state, a side collision occurred on the door 14 while the vehicle was running or stopped,
When this is detected by a known collision detection sensor, the airbag device 5 is activated and the gas generated by the gas generator 7 is instantaneously supplied to the inside of the airbag body 9 from the gas ejection port 7a. As a result, the airbag body 9 is instantly expanded into the predetermined shape, and the occupant is protected from the impact due to the side collision.

At this time, since the gas ejection amount of the airbag main body 9 of the gas generator 7 in the deploying direction, that is, the forward direction is set to be larger than that of the other portions, the airbag cover 10 is formed of a thin portion. It is possible to instantly deploy the airbag body 9 to the door glass 14a side by breaking through the shielding member 10c.

As described above, according to the above-described embodiment, the airbag device 5 is configured so as to also serve as the pillow 13 mounted on the rear pillar 4, so that the pillow device 13 and the rear pillow 4 are incorporated in the airbag device 5. And the pillow 13 faces the seated person's head and is close to the door.
Since the 14 is arranged at a position facing the door glass 14a, the occupant can be surely protected even if the volume of the airbag main body 9 covering the door glass 14a at the time of deployment is reduced.
It is possible to reliably prevent the occupant's ears and the like from being damaged by suppressing the pressure increase in the vehicle interior.

Further, since the deployed state of the airbag body 9 may be linear, the deployment can be performed instantaneously. Further, since no force acts on the front portion of the pillow 13, the shielding member 10c can be formed with low strength, and no trouble occurs when the airbag body 9 is deployed.

Further, in the embodiment described above, the case where the shielding member 10c is integrally formed with the airbag cover 10 has been described, but the shielding member 10c may be separately formed and fixed to the airbag cover.

〔The invention's effect〕

The above is the configuration of one embodiment of the airbag device according to the present invention. According to this configuration, the airbag cover of the airbag device is provided in the rear pillar of the vehicle compartment and protects an occupant in a side collision. A pair of side plate portions, a front plate portion connecting side edges of the pair of side plate portions, a front end portion surrounded by the pair of side plate portions and the front plate portion, and the airbag main body is expanded The airbag cover is formed in the same shape as a pillow arranged on a rear pillar of the vehicle, and the airbag cover is arranged on the rear pillar, and a front end portion of the airbag cover is formed. Since the airbag cover is fixed so that the shielding member projects into the passenger compartment, and the outside of the front plate portion is formed into a pillow, by arranging this airbag device in the rear pillow that is a pillow mounting portion, ,air The side surface of the bag cover can also serve as a pillow for receiving the head of the occupant, and since no force acts on the front portion of the pillow, the shielding member at the front portion is formed to have low strength such as a thin portion. An airbag that can protect the occupant's head reliably by deploying the airbag body in a straight line instantaneously without causing any hindrance to the bulging of the airbag body during a side collision. The device can be obtained.

[Brief description of drawings]

1 to 3 respectively show an outline of one embodiment of an airbag device according to the present invention. FIG. 1 is a partial perspective view of a passenger compartment, and FIG. 2 is a device in which an airbag device is mounted on a rear pillar. FIG. 3 is a horizontal cross-sectional view of the above state, and FIG. 3 is a perspective view showing the right half portion of the airbag cover. In the figure, 1 ... rear seat, 2 ... seat cushion, 3
…… Seat back, 4 …… Rear pillar, 5 …… Airbag device, 6 …… Base plate, 7 …… Gas generator, 8
…… Gas inlet, 9 …… Airbag body, 10 …… Airbag cover, 10c …… Shielding member, 13 …… Pillow, 16 ……
Cushion material, 17 …… Surface material.

Claims (1)

[Claims] 1. A base plate, which is disposed on a rear pillar of a passenger compartment and is mounted on a fixed side, a gas generator fixed to the base plate, and air which is mounted so as to bulge by the operation of the gas generator. In an airbag device including a bag body and an airbag cover that houses the airbag body, the airbag cover includes a pair of side surface plate portions and a front plate portion that connects side edges of the pair of side surface plate portions. And a pillow member that is formed at a front end portion surrounded by the pair of side plate portions and a front plate portion and that opens when the airbag body is deployed, and a pillow that arranges the airbag cover on a rear pillar of a vehicle. The airbag cover is formed in the same shape, the airbag cover is arranged on the rear pillar, and the airbag cover is fixed so that the shielding member at the front end portion of the airbag cover projects into the vehicle interior. Airbag apparatus characterized by outer serial front plate portion are formed on the pillow.