JP6364231B2 - Airbag device - Google Patents

Description

  The present invention relates to an airbag device installed in a vehicle to protect an occupant particularly in a frontal collision.

  For the purpose of ensuring the safety of passengers, some safety devices are installed in automobiles. An airbag device that deploys an airbag with gas generated by an inflator in an emergency such as a collision is also one of safety devices.

  The airbags that make up this airbag device can change the internal pressure (hardness) of the airbag depending on the physique (size) of the occupant regardless of the type of airbag, not just for the driver seat and passenger seat. It is not made to do.

  The fact that the internal pressure of the airbag is the same regardless of the occupant's physique is described or suggested to change the internal pressure of the airbag depending on the occupant's physique, anywhere in Patent Document 1, for example, which describes an invention related to an airbag It is clear from the lack of.

  However, when the airbag internal pressure is the same regardless of the occupant's physique, the occupant P1 having a small physique is less resistant than the occupant P2 having a general physique when the airbag 1 is deployed. In an airbag having an airbag internal pressure, the injury value may deteriorate.

JP 2010-274901 A

  The problem to be solved by the present invention is that, if the internal pressure of the airbag is the same regardless of the occupant's physique, the occupant with a small physique inputs excessive force from the deployed airbag, resulting in a worse injury value. There is a possibility.

  The present invention has been made to solve the above problems. In other words, in the present invention, by making the internal pressure of the airbag acting on the occupant at the time of a collision changeable according to the occupant's physique, even an occupant with a small physique can generate an optimal reaction force. The above-mentioned problem is solved.

That is, the airbag device of the present invention is
An airbag device including an inflator and an airbag,
The airbag is
It is formed in a bag shape by sewing the outer periphery of a plurality of base fabrics,
Of the plurality of base fabrics, the front base fabric positioned on the front surface of the occupant during deployment is below the position where the head of the general occupant is pressed at the time of collision, and lower than the position where the head of the small occupant is pressed. The most important thing is that a vent hole is provided at an upper position, and is widened from the lower side to the upper side, and the upper part is folded back in the width direction of the vehicle and covered with a lid member that opens the vent hole at the upper side. It is a feature.

  In the present invention, the downward direction refers to the floor direction of the vehicle, and the upward direction refers to the ceiling direction of the vehicle. The left-right direction refers to the vehicle width direction perpendicular to the traveling direction of the vehicle.

  In the present invention, even when a small occupant is pressed against the deployed airbag at the time of a collision, the lid hole does not block the vent hole, so the gas in the airbag passes through the opening of the lid member from the vent hole. It will be released and will hold a small sized occupant with optimal reaction force.

  On the other hand, when a passenger with a general physique or large physique is pressed against the deployed airbag at the time of a collision, the lid member is crimped with its head or the like, and the airbag inside the airbag released from the vent hole Prevent gas from being released to the outside.

In addition, since the lid member is formed wide from bottom to top and the upper part is folded back in the left-right direction, if the occupant has a small physique, the lid covers the gas from the vent hole at the time of the collision. Release to the outside through the member becomes easier.

At that time, if the upper end of the lid member has a length that reaches the upper end of the front base fabric, the gas in the airbag can be more reliably prevented from being released to the outside through the vent hole. become.

  In the present invention, a vent hole is provided at a position below the position where the head of the general occupant is pressed against the front base fabric at the time of collision, and above the position where the head of the small occupant is pressed. The following effects can be acquired by covering with the cover member opened upward.

(1) In the event of a collision, even if a small occupant is pressed against the deployed airbag, the lid member does not block the vent hole, so the gas in the airbag is released from the vent hole through the lid member. It is possible to hold an occupant with a small physique with an optimal reaction force.

(2) On the other hand, when a passenger with a general physique or large physique is pressed against the deployed airbag at the time of a collision, the lid member is crimped with its head, etc. Gas is not released to the outside, and the occupant can be held with the optimum reaction force as before.

  In other words, according to the present invention, the occupant can be held with an optimum reaction force according to the physique, so that the injury value due to the occupant's physique can be prevented from deteriorating.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing of the airbag which is a component of the airbag apparatus of this invention, (a) is the figure seen from the seated passenger | crew direction, (b) is AA sectional drawing of (a), (c) is an airbag. It is a disassembled perspective view of the base fabric which comprises a bag. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram of an airbag apparatus according to the present invention; FIG. It is a figure explaining the 2nd example of the airbag which is a component of the airbag apparatus of this invention, (a) is a disassembled perspective view, (b) is the figure seen from the front base fabric side. It is a perspective view explaining the 3rd example of the airbag which is a component of the airbag apparatus of the present invention. It is a perspective view explaining the 4th example of the airbag which is a component of the airbag apparatus of the present invention. It is a figure similar to FIG. 2 of the conventional airbag apparatus.

  In a conventional airbag device in which the internal pressure of the airbag is the same regardless of the occupant's physique, an occupant with a small physique may input an excessive force from the airbag, which may deteriorate the injury value.

  In the present invention, a vent hole is provided at a position below the position where the head of a general occupant is pressed against the front base fabric at the time of collision, and above the position where the head of a small occupant is pressed. The above-mentioned problem is solved by covering with a lid member opened upward.

  The present invention will be described below with reference to the accompanying drawings. 1 and 2 are views for explaining an example of a passenger seat airbag device of the present invention attached to an upper portion of an instrument panel.

  Reference numeral 11 denotes an airbag device according to the present invention, which includes an inflator 12 and an airbag 13.

  Among these, the airbag 13 is located on both sides, for example, a front base fabric 14 positioned on the front surface of the occupant at the time of deployment, an upper surface base fabric 15 positioned on the upper side, a bottom surface base fabric 16 positioned on the lower side. The outer peripheral edges of the side base fabrics 17 and 18 are sewn to form a bag shape.

  And in this invention, the position where the head H of the small passenger | crew P1 is pressed below the position where the head H of the general passenger | crew P2 is pressed by the front base fabric 14 which comprises the said airbag 13 at the time of a collision. For example, a circular vent hole 19 is provided at a higher position.

  The shape and size of the vent hole 19 are not particularly limited, but when the head H of the small occupant P1 is pressed at the time of a collision, the gas in the airbag 13 is appropriately discharged and the small occupant is at an optimal internal pressure. What is necessary is just to be able to hold P1.

  Further, in the present invention, the vent hole 19 is covered with a lid member 20 having a length where the upper end reaches the upper end portion of the front base fabric 14, and the upper portion of the lid member 20 is opened 21.

  In the example of FIG. 1, the lid member 20 is configured separately from the base fabrics 14 to 18 constituting the airbag 13, and shows an opening 21 formed by not sewing only the upper end side. As shown in FIG. 3, for example, the airbag 13 may be formed integrally with the upper surface base fabric 15. In this case, a slit is made at a position closer to the front base fabric 14 than the sewing portion of the upper base fabric 15 and the front base fabric 14 to form an opening 21.

  In the present invention having the above-described configuration, in the case of the occupant P1 having a small physique at the time of the collision, the head H is positioned below the vent hole 19, so that even if the head H is pressed against the deployed airbag 13, As shown in 2 (b), the vent hole 19 is not blocked.

  Accordingly, the gas in the airbag 13 is discharged from the vent hole 19 through the lid member 20 to the outside through the opening 21, and the small physique P1 is held by the optimum reaction force. Even in the case of the passenger P1, it is possible to prevent the injury value from deteriorating.

  On the other hand, in the case of an occupant P2 having a general physique at the time of collision, the head H is positioned above the vent hole 19, so that when the head H is pressed against the deployed airbag 13, the head H covers the lid. The member 20 is pressure-bonded.

  Therefore, even if the gas in the airbag 13 is released from the vent hole 19, it is possible to effectively prevent the gas from being released to the outside by the lid member 20 to which the head H is crimped. Therefore, the passenger P2 having a general physique is held.

  The present invention is not limited to the above example, and it goes without saying that the embodiments may be changed as appropriate within the scope of the technical idea described in each claim.

  That is, the airbag apparatus described above is a preferable example of the present invention, and other embodiments can be implemented or performed by various methods. In particular, the present invention is not limited to the detailed shape, size, configuration, and the like of the components shown in the accompanying drawings unless otherwise specified in the present specification. In addition, expressions and terms used in the present specification are for the purpose of explanation, and are not limited thereto unless specifically limited.

  For example, as shown in FIG. 4, the lid member 20 may be formed to have a wide width from the lower side to the upper side, and the upper part may be folded back in the left-right direction. In this manner, in the case of the occupant P1 having a small physique, it becomes easier to release the gas in the airbag 13 from the vent hole 19 through the lid member 20 to the outside at the time of collision.

  Further, the shape of the airbag 13 is not limited to a rectangular shape as viewed from the front base fabric 14 side as shown in FIGS. 1 and 4, but is also viewed from the front base fabric 14 side as shown in FIG. 5. It may be circular.

DESCRIPTION OF SYMBOLS 11 Airbag apparatus 12 Inflator 13 Airbag 14 Front base fabric 19 Vent hole 20 Lid member 21 Opening

Claims (2)

An airbag device including an inflator and an airbag,
The airbag is
It is formed in a bag shape by sewing the outer periphery of a plurality of base fabrics,
Of the plurality of base fabrics, the front base fabric positioned on the front surface of the occupant during deployment is below the position where the head of the general occupant is pressed at the time of collision, and lower than the position where the head of the small occupant is pressed. A vent hole is provided at an upper position and is widened from the lower side to the upper side. The upper part is folded back in the vehicle width direction and covered with a lid member that opens the vent hole at the upper side. Airbag device.   The airbag device according to claim 1, wherein the lid member has a length such that an upper end reaches an upper end portion of the front base fabric.

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