JP2010173351A - Airbag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the conventional problem that costs are increased because there is a need for providing a plurality of inflaters in an airbag device for deploying an airbag according to an occupant's physique and the plurality of inflaters must be operated separately depending on conditions. <P>SOLUTION: In this airbag device, a gas supply part 8 is provided to a base part in an airbag 9, and flow straightening clothes 1, 2 comprise an inner flow straightening cloth 2 positioned on the gas supply part 8 side, and an outer flow straightening cloth 1 positioned on a swollen part side and arranged to overlap the inner flow straightening cloth 2. A portion opposed to the gas supply part 8 of the inner flow straightening cloth 2 is connected to the gas supply part 8 with a string 6, and the string 6 is connected to holding means 7 selectively opened according to a condition of a protected article. Gas passage holes 3, 4, 5 are formed on the inner flow straightening cloth 2 and the outer flow straightening cloth 1, and the gas passage holes 3, 4, 5 of the inner flow straightening cloth 2 and the outer flow straightening cloth 1 are closed by overlapping of the inner flow straightening cloth 2 and the outer flow straightening cloth 1 when the holding means 7 opens the string 6. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an airbag apparatus that is mounted on a vehicle seat and protects an occupant in the event of a vehicle collision, and that can deploy an airbag that matches the physique of the occupant.

It is widely used today that air bags are equipped as a means for absorbing and mitigating shocks to passengers in vehicle collisions. Airbags are instantly deployed in response to vehicle collisions, etc., and catch an occupant. It is important that the airbag be deployed quickly and smoothly.
However, normal airbag deployment assumes that the physique is an average occupant, or that the occupant is sitting in a regular seating position and wearing a seat belt, and the physique is significantly larger than the average. There is a need for an airbag device that can perform suitable airbag deployment in accordance with the occupant, such as when the airbag is in close proximity when the occupant / object is sitting (placed) near the instrument panel in front of the normal position. It has been.
As a prior art, in a system for generating gas discharge for inflating a vehicle occupant protection device by gas operation, a first means for receiving information representing instantaneous vehicle acceleration, and a fixed internal structure in the vehicle On the other hand, in response to the received vehicle acceleration information and the received occupant position information, the second means for receiving information representing the instantaneous occupant position, and the collision type is expressed using the received vehicle acceleration information. Processor means for determining a first measured quantity, wherein a desired inflation profile is determined using the received occupant position information and the first measured quantity representing a collision type, and the received vehicle acceleration information is The processor means for simultaneously determining a first real firing time so as to be fired by simultaneously determining a first real time using the first firing time and the desired expansion process; In response to a file, an actuating means for generating gas discharge according to the desired expansion profile at the first firing time, the actuating means comprising at least two separate triggerable gas generators. An expander assembly, wherein one of the gas generators has an output characteristic different from that of the other of the gas generators, and the desired expansion profile is any of the at least two gas generators. There is a system (for example, see Patent Document 1) that selects whether to trigger at the first firing time.

JP-T-8-507993 (refer to the claims, detailed description of the invention, and FIG. 1)

The prior art is a system that controls how many inflators are operated to deploy an airbag out of a plurality of inflators provided by an accelerometer, vehicle acceleration information, and occupant position information when an airbag crash occurs. The airbag device is adapted to the occupant's physique with the number of inflators activated.
However, in the above prior art, a plurality of inflators must be provided in the airbag device, and a plurality of inflators must be individually operated according to the situation. Since it is used, there is a problem that the cost is increased.
The present invention solves these problems, and provides an airbag device that deploys an airbag that matches the physique of an occupant in a simple and inexpensive manner.

A first invention of the present invention capable of achieving the above object is an airbag device as described in claim 1, and is as follows.
In an airbag device including an airbag and an inflator that supplies gas into the airbag, the airbag has a base portion and a bulge portion, the base portion has a gas supply portion, and a rectifying cloth that wraps the gas supply portion is provided. The inner rectifying cloth located on the gas supply part side and the outer rectifying cloth located on the bulging part side and arranged so as to overlap the inner rectifying cloth, the place facing the gas supply part of the inner rectifying cloth It is connected to the gas supply unit side with a hanging string, and the hanging string is connected to a holding means that selectively opens depending on the state of the object to be protected, and a gas passage hole is formed in each of the inner rectifying cloth and the outer rectifying cloth. The gas flow holes of the inner rectifying cloth and the outer rectifying cloth are closed when the maintenance means opens the hanging strap due to the overlap of the inner rectifying cloth and the outer rectifying cloth.

A second invention of the present invention capable of achieving the above object is an airbag device for a passenger seat as described in claim 2, which is as follows.
In addition to the invention described in claim 1, the outer rectifying cloth is further provided with another through hole, and when the holding means releases the hanging strap, it overlaps with the through hole of the inner rectifying cloth, and the gas passage is It is the structure formed.

Since the passenger seat airbag apparatus according to the present invention has the configuration as described above, the following effects are achieved.
(1) The airbag can be deployed in accordance with the occupant's physique, and an over-impact due to the deployment of the airbag on an occupant having a large physique can be prevented as well as normal airbag deployment.
(2) Conventionally, the airbag has been developed in accordance with the occupant's physique by adjusting the number of inflators and the strength of the output. However, by adopting the present invention, it is possible to cope with a low cost.
(3) The processing is simple with a configuration in which only two rectifying cloths and holding means are provided.

It is a general | schematic partial cross-section perspective view which shows one Example of the airbag apparatus of this invention. It is a schematic explanatory drawing which shows the expansion | deployment method when not hold | maintaining a holding means at the time of the collision of the airbag apparatus of this invention. It is a schematic explanatory drawing which shows the expansion | deployment method at the time of releasing a holding means at the time of the collision of the airbag apparatus of this invention.

  In an airbag device including an airbag and an inflator that supplies gas into the airbag, the airbag has a base portion and a bulge portion, the base portion has a gas supply portion, and a rectifying cloth that wraps the gas supply portion is provided. The inner rectifying cloth located on the gas supply part side and the outer rectifying cloth located on the bulging part side and arranged so as to overlap the inner rectifying cloth, the place facing the gas supply part of the inner rectifying cloth Connected to the gas supply side with a hanging string and connected to a holding means that selectively opens the hanging string depending on the state of the object to be protected. The gas passage hole of the inner rectifying cloth and the outer rectifying cloth is closed by the overlap of the inner rectifying cloth and the outer rectifying cloth when the holding means releases the hanging strap.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a schematic partial cross-sectional perspective view showing an example of the airbag apparatus of the present invention.
The airbag apparatus of the present invention is provided with an outer rectifying cloth 1 and an inner rectifying cloth 2 for rectifying the gas ejected from the inflator 8 into the airbag 9.
The outer rectifying cloth 1 is provided with two gas through holes 3 and 4 through which the gas ejected from the inflator 8 is passed. The inner rectifying cloth 2 is provided with one gas through hole 5, and further the inner rectifying cloth. 2 is provided with a tether 6 which is a hanging strap capable of suppressing the expansion of the inner flow regulating cloth 2, and is connected to holding means formed on the outer side of the airbag module.
Due to the above-described configuration, the gas ejected from the inflator 8 into the airbag 9 is restrained and adjusted by the two outer rectifying cloths 1 and the inner rectifying cloth 2 when the airbag is deployed, so that the passenger gets on the passenger or the seat. It is possible to carry out a suitable and suitable airbag deployment in accordance with the state (physique and position) of the object.

FIG. 2 shows the deployment of the airbag in the case of an out-of-position object without a large occupant or seat belt.
The rectifying cloth in the airbag 9 has a double structure of the outer rectifying cloth 1 and the inner rectifying cloth 2, and the outer rectifying cloth 1 has an upper gas passage 3 and a lower gas passage 4 formed therein. The rectifying cloth 2 is provided with a gas passage hole 5 that overlaps the upper gas passage hole 3.
The gas passage hole 5 is at least larger than the area of the upper gas passage hole 3 and the lower gas passage hole 4 of the outer rectifying cloth 1, and in the vicinity of the gas passage hole 5, the tether 6 is shorter than the distance that the inner rectifying cloth 2 spreads. For example, in the case of an occupant with a large physique, the sensor detects the body shape by the weight of the occupant, the position of the seat position, etc., and the tether 6 fixed to the pyroactuator 7 is not released. The gas ejected from 8 is ejected into the airbag 9 from the upper gas passage hole 3 and the lower gas passage hole 4 so that the airbag can be quickly deployed, and the occupant having a large physique has a fast movement acceleration at the time of a vehicle collision. On the other hand, more suitable airbag deployment can be performed.

FIG. 3 shows the airbag deployment when the airbag 9 is not in close proximity or when the airbag 9 is not a large occupant.
The sensor senses the body shape based on the weight of the occupant, the position of the seat position, and the like. If the occupant is not a large physique, a signal is sent to the pyroactuator 7 and the tether 6 is opened. Then, the inner rectifying cloth 2 is pushed by the internal pressure due to the gas ejected from the inflator 8, and there is no gap with the outer rectifying cloth 1. Since the upper gas passage hole 3 and the gas passage hole 5 are in the same position, the gas passes but the gas passage hole 4 is closed. Therefore, as a result, the area of the gas exhaust hole provided in the outer rectifying cloth 1 is reduced, the airbag is softened, and a more favorable airbag deployment can be obtained by the occupant.

  In the above embodiment, the outer rectifying cloth 1 and the inner rectifying cloth 2 of the present invention are each provided with two gas holes and one gas hole, but the number of gas holes depends on the situation. Needless to say, various selections can be made.

  The present invention can be used for all automobile airbag devices that can be equipped with an airbag.

1 .... Outer rectifying cloth 2 .... Inner rectifying cloth 3 .... Upper gas passage 4 .... Lower gas passage 5 .... Gas passage 6 .... Tether 7. ... Pyroactuator 8 ... Inflator 9 ... Airbag

Claims (2)

In an airbag device including an airbag and an inflator that supplies gas into the airbag, the airbag has a base portion and a bulge portion, the base portion has a gas supply portion, and a rectifying cloth that wraps the gas supply portion is provided. The inner rectifying cloth located on the gas supply part side and the outer rectifying cloth located on the bulging part side and arranged so as to overlap the inner rectifying cloth, the place facing the gas supply part of the inner rectifying cloth Connected to the gas supply side with a hanging string and connected to a holding means that selectively opens the hanging string depending on the state of the object to be protected. And the gas passage hole of the inner rectifying cloth and the outer rectifying cloth is closed by the overlap of the inner rectifying cloth and the outer rectifying cloth when the holding means releases the hanging strap. 2. The outer rectifying cloth is further provided with another through hole, and when the holding means releases the hanging strap, the outer rectifying cloth overlaps with the through hole of the inner rectifying cloth, and a gas passage is formed. The airbag apparatus as described.

Images