JP2012116280A - Airbag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of stably and easily opening/closing an exhaust hole when an airbag is expanded and inflated in full.SOLUTION: The airbag includes an exhaust hole 3, a pulling member 4 for opening/closing the exhaust hole 3, a first attachment part of an occupant-side airbag part, a second attachment part of a vehicle-side airbag part 1, and a closing part arranged so as to overlap the exhaust hole 3. The pulling member 4 is pulled when the occupant-side airbag part relatively separates from the vehicle-side airbag part 1. The closing part partially overlaps the exhaust hole 3 or moves to a retract position. The second attachment part is composed of a plurality of attachment pieces and attached at a plurality of attachment positions on the vehicle body. The distance between the attachment points is larger than the original size of the attachment pieces of the pulling member 4.

Description

  The present invention relates to an airbag that is mounted on a vehicle and that can be suitably deployed to an occupant in an airbag device that protects the occupant in the event of a vehicle collision.

In order to reduce the impact on passengers in the event of a vehicle collision, airbags have become widespread and the number of places where they can be installed has increased in front of passengers seated in the driver's and passenger's seats as a response to collisions from the front. Many types of airbags, such as side cushion-shaped airbags and curtain-shaped airbags that partially cover the side of the vehicle, are used in many vehicles to deal with collisions and rollovers of airbags and other vehicles on the side. Has been applied.
With the widespread use of such airbags, the usefulness has been confirmed in a large number of operation cases (collision cases), and various attempts have been made to improve to provide even better protection. Has been made.
As a prior art according to the present invention, an airbag that is inflated and deployed by a gas supplied from an inflator into a bag-shaped bag body, and the gas inside and outside the bag body according to the deployed state of the bag body. The bag body is provided with a variable vent hole whose flow state is changed, and a flow state changing means for changing the flow state of the gas in the variable vent hole, and the bag body is developed in a plurality of directions step by step. Yes, the flow state changing means is in a permissible state allowing the flow of gas inside and outside the bag body through the variable vent hole in the initial deployment stage in the initial deployment direction in the initial stage of inflation and deployment of the bag body, In the subsequent deployment stage in the deployment direction different from the initial deployment direction after the initial deployment stage, according to the deployment state of the bag body The allowable state and an air bag, characterized by selectively setting the said inhibiting suppression state the flow of gas in and out of the bag body through the variable vent hole. (For example, refer to Patent Document 1).

Japanese Patent Laying-Open No. 2005-14861 (see claims, detailed description of the invention, and FIGS. 1 to 15)

Patent Document 1, which is the conventional technology, uses a single straight base fabric valve and opens and closes an exhaust hole for exhausting excess gas in order to inflate and deploy an airbag suitable for an occupant. ing.
However, in the case of a straight basement valve, when the baseball valve is inflated and deployed, the basement valve becomes thin due to bending or distortion of the basement valve. May occur.
For this reason, it is complicated at the stage of research and development and manufacturing of an airbag, such as devising a preferable folding method and means for smooth movement of the base fabric valve, and raises a problem of cost increase.
Then, this invention aims at providing the airbag which can make the suitable airbag expansion | deployment which is said subject stable and easy.

A first invention of the present invention capable of solving the above-described problems is an airbag as described in claim 1, and is as follows.
In an airbag apparatus including an airbag that is folded and deployed by an inflating gas supplied from an inflator, the airbag includes an exhaust hole and a pulling member that is a base fabric valve that opens and closes the exhaust hole. The member includes a first attachment portion that is attached to the passenger-side airbag portion when the exhaust hole is the center, a vehicle body-side airbag portion when the exhaust hole is the center, or a second attachment portion that is attached to the vehicle body, It has a closing part that can be placed in the exhaust hole so that it can be layered. The pulling member, which is the base fabric valve, is pulled by the relative separation between the occupant-side airbag part and the vehicle body-side airbag part. At least partially overlap or move to the retracted position, the second mounting portion is composed of a plurality of mounting pieces, and is attached at a plurality of mounting points on the vehicle body side. Relative to the size of the original of a plurality of mounting pieces of a is pulling member Lube, distance between the plurality of attachment points is configured to be large.

A second invention of the present invention capable of solving the above-described problems is an airbag as described in claim 2 and is as follows.
In addition to the first aspect of the invention, the first mounting portion and the second mounting portion are configured by a plurality of mounting pieces.

Since the airbag according to the present invention has the configuration as described above, the following effects are achieved.
(1) The airbag of the present invention has a structure that opens and closes an exhaust hole for discharging excess gas in order to inflate and deploy an airbag suitable for an occupant, and includes a pulling member that is a base fabric valve. By configuring the first mounting portion and the second mounting portion, the tension of the exhaust hole can be concentrated on a certain part, the outflow of gas from the exhaust hole can be suppressed, and a suitable airbag deployment can be achieved. It can be performed stably.
(2) By providing the tension protection member, it is possible to prevent the tension member from floating when the airbag is deployed, and to further suppress the outflow of gas so that the airbag is more suitably deployed.
(3) Since the pulling member can be configured by linearly cutting the base fabric when cutting the airbag, the yield is improved.
(4) Since the first attachment portion and the second attachment portion of the pulling member are attached to the airbag with multiple forks (for example, the second attachment portion is divided into two forks), the excess of the airbag normally provided in the airbag is required. The two crotch portions of the pulling member can be attached while avoiding the hanging strap for preventing the expansion.

It is a schematic perspective view which shows one Example of a structure of the airbag of this invention. It is a schematic front view which shows an example of the tension | pulling member which is a base fabric valve | bulb after the base fabric cutting | disconnection in the airbag of this invention. It is explanatory drawing which shows the effect of the tension member which is a base fabric valve | bulb which is the characteristics of the airbag of this invention. It is explanatory drawing which shows the effect of the tension member of a prior art. It is the image figure seen from the inside of the airbag which shows the state which attached the tension | pulling member which is the base fabric valve | bulb which is the characteristics in the airbag of this invention to the airbag. It is explanatory drawing which shows the state change at the time of the airbag expansion | deployment deployment of the airbag of this invention. It is explanatory drawing which shows the effect of the tension member of the other Example of the airbag of this invention.

  In an airbag device including an airbag that is folded and deployed by an inflating gas supplied from an inflator, the airbag includes an exhaust hole and a base fabric valve that opens and closes the exhaust hole. A first mounting portion that is attached to the passenger-side airbag portion when the exhaust hole is centered, a vehicle body-side airbag portion that is centered on the exhaust hole, or a second mounting portion that is attached to the vehicle body, and an exhaust hole Whether the base fabric valve is pulled by the relative separation between the passenger side airbag portion and the vehicle body side airbag portion so that the closure portion overlaps the exhaust hole at least partially. The second mounting portion is composed of a plurality of mounting pieces, is attached at a plurality of mounting points on the vehicle body side, and the dimensions in the original form of the plurality of mounting pieces of the base fabric valve In contrast, the distance between the plurality of attachment points is an air bag becomes larger.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a schematic perspective view showing the configuration of an airbag according to the present invention. In the airbag according to the present invention, gas in the airbag is exhausted to the outside in the inflated body of the non-passenger side main panel 1 of the airbag. A first mounting portion 6 that is a linear portion of the pulling member 4 is sewn on the non-occupant-side main panel 1 and a second end that is the other end of the pulling member 4 is provided. The mounting portion 7 is formed in a bifurcated shape and is sewn from the non-occupant side main panel 1 to the occupant side main panel 2.
FIG. 2 shows the tension member 4 after cutting the base fabric, and the tension member 4 used in the present invention has a bifurcated shape by linearly cutting the second attachment portion 7 of the linear base fabric. Can be formed at a cost similar to that of the prior art, and the yield is improved, despite the superior effects of the conventional tension member 4 ′ formed in a straight line. is there.
FIG. 3 shows the effect of the pulling member 4 in the airbag of the present invention. The pulling member 4 of the present invention has a first attachment portion 6 that is a straight portion and a portion divided into two forks. When there is a second mounting portion 7 and each is pulled when the airbag is deployed, the tension is concentrated on the portion of the pulling member 4 that overlaps the exhaust hole 3 for exhausting the gas in the airbag to the outside. It is possible to suppress the escape of gas and provide a suitable airbag deployment for the occupant.

  FIG. 4 shows a pulling member 4 ′ according to the prior art, which is not divided into two forks as in the present invention, so that the concentration of tension is applied from the center of the left and right to the entire top and bottom. It may be folded or distorted, and the exhaust hole 3 may not be sufficiently closed, and the position of the base fabric valve and the pulling action point when folding the airbag can be set, and a smooth slide can be obtained. It may be necessary to adjust the guide structure.

FIG. 5 is an image view seen from the inside of the airbag showing a state in which the tension member is attached to the airbag. The tension member 4 is provided at a position overlapping the exhaust hole 3 for exhausting the gas in the airbag to the outside. Yes, a tension protection member 5 is provided on the tension member 4.
The pull protection member 5 serves to help the slide of the pull member 4 smoothly and also has an effect of preventing the pull member 4 from being lifted when the airbag is deployed.

Next, a change in the deployed state of the airbag of the present invention will be described with reference to FIG.
FIG. 6A shows a state immediately after the airbag is deployed. The airbag is in the middle of deployment, and the second mounting portion 7 that is the two crotch portion of the pulling member 4 is opened, so that the anti-occupant Since the exhaust hole 3 of the side main panel 1 and the pulling member 4 do not overlap, the exhaust hole 3 is in an open state.
FIG. 6B shows a state in which the airbag is inflated and deployed in the maximum. The pulling member 4 is pulled, and a straight portion other than the two crotch portions overlaps the exhaust hole 3. Indicates the closed state.
FIG. 6C shows a state in which the occupant is in contact with the airbag, the occupant presses the airbag, and the pulling member 4 is overlapped with the exhaust hole 3 by the movement of the occupant pressing the airbag. Since the exhaust hole 3 is pushed out of the airbag, the exhaust hole 3 is opened.
In other words, the change in the exhaust hole 3 from immediately after the start of the airbag deployment until the end of the airbag deployment is performed in the order of opening and closing, and when the passenger contacts the airbag, the internal pressure of the airbag is maximized. And the impact is absorbed by supporting the occupant moving to the airbag side, and then the internal pressure in the airbag is lowered to reduce the reaction force of the airbag deployment to the occupant. The present invention provides a suitable airbag deployment.

Here, another embodiment of the present invention will be described.
FIG. 7 shows another embodiment of the tension member 4, and the first crotch portion provided on the second attachment portion 7 is not only on the occupant side main panel 2 side but also on the side opposite to the occupant side main panel. It is also provided on the attachment portion 6 and can concentrate the force at a more limited place by concentration of tension from four directions.
In addition, although not shown in drawing, the 1st attaching part 6 and the 2nd attaching part 7 can employ | adopt not only two forks but the multi-thigh tension member 4. FIG.

  It can be used for airbags in various forms and places of use for all types of vehicles.

DESCRIPTION OF SYMBOLS 1 ... Anti-occupant side main panel 2 ... Passenger side main panel 3 ... Exhaust hole 4 ... Pull member 4 '... Conventional pull member 5 ... Pull protection Member 6 ... First mounting part 7 ... Second mounting part

Claims (2)

In an airbag apparatus including an airbag that is folded and deployed by an inflating gas supplied from an inflator, the airbag includes an exhaust hole and a pulling member that is a base fabric valve that opens and closes the exhaust hole. The member includes a first attachment portion that is attached to the passenger-side airbag portion when the exhaust hole is the center, a vehicle body-side airbag portion when the exhaust hole is the center, or a second attachment portion that is attached to the vehicle body, It has a closing part that can be placed in the exhaust hole so that it can be layered. The pulling member, which is the base fabric valve, is pulled by the relative separation between the occupant-side airbag part and the vehicle body-side airbag part. At least partially overlap or move to the retracted position, the second mounting portion is composed of a plurality of mounting pieces, and is attached at a plurality of mounting points on the vehicle body side. Airbag, wherein relative to the size of the original of a plurality of mounting pieces of a is pulling member Lube, that the distance between the plurality of attachment points is large. The airbag according to claim 1, wherein the first attachment portion and the second attachment portion are each constituted by a plurality of attachment pieces.

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