JP2014043228A - Knee airbag device for vehicle - Google Patents

Knee airbag device for vehicle Download PDF

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JP2014043228A
JP2014043228A JP2012188283A JP2012188283A JP2014043228A JP 2014043228 A JP2014043228 A JP 2014043228A JP 2012188283 A JP2012188283 A JP 2012188283A JP 2012188283 A JP2012188283 A JP 2012188283A JP 2014043228 A JP2014043228 A JP 2014043228A
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airbag
vehicle
airbag device
knee airbag
knee
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JP5984586B2 (en
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Yukihiro Naito
幸広 内藤
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Nihon Plast Co Ltd
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Nihon Plast Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a knee airbag device for a vehicle which ensures an easy getting-out motion and does not increase an expansion reaction force more than necessary.SOLUTION: A knee airbag device 2 for a vehicle includes an inflator capable of generating gas G, and an air bag 5 which can be expanded by the gas G. The air bag 5 is provided with an auxiliary chamber 9 which can communicate with the air bag 5 when legs 3b of a passenger is pressed into the air bag 5 in the expansion of the air bag 5.

Description

本発明は、自動車、航空機、船舶、鉄道車両などの乗り物用ニーエアバッグ装置に関するものである。   The present invention relates to a knee airbag device for a vehicle such as an automobile, an aircraft, a ship, and a railway vehicle.

従来の乗り物用ニーエアバッグ装置としては、例えば、自動車の座席の前方であって、座席の座面高さ付近を含む高さの領域に展開され、座席の中央部前方よりも左右どちらかに寄った位置に設けられ、エアバッグの展開形状が座席の幅方向の両端側が座席に向かって突出し、座席中央部と対峙する部分には座席から遠ざかる方向へ凹んだ形状を有している（先行技術文献１）ものが、従来技術として知られている。   As a conventional vehicle knee airbag device, for example, it is deployed in a region in front of the seat of an automobile and including a height near the seat surface of the seat, and on either the left or right side of the front of the central portion of the seat. The air bag is deployed at a position where both ends of the seat in the width direction protrude toward the seat, and the portion facing the center of the seat has a shape recessed toward the seat (preceding) Technical literature 1) is known as the prior art.

特許第３１８６１６３号公報Japanese Patent No. 3186163

しかしながら、かかる従来技術は、エアバッグの展開形状が座席の幅方向の両端側が座席に向かって突出しているので、大容量のガスを必要とし、また、ニーエアバッグが設置箇所等の条件からエアバッグ内部に充填されたガスを外部へ排出するベントホールを設けにくいため、エアバッグの膨張圧が高くなり、反力が想定より高いものとなるおそれがあり、かかる従来技術のようにエアバッグの凹んだ形状の箇所と座席の幅方向の両端部とが一体に同じ内圧となるよう形成されたエアバッグが展開するような緊急脱出時に、該突出部が乗員の脚の周りの空間を狭め、降り動作の邪魔になる恐れがある。   However, such a conventional technique requires a large volume of gas because the airbag has a deployed shape in which both ends in the width direction of the seat protrude toward the seat. Since it is difficult to provide a vent hole for discharging the gas filled inside the bag to the outside, there is a possibility that the inflation pressure of the airbag will increase and the reaction force may be higher than expected. At the time of emergency escape where the airbag formed so that the recessed portion and the both ends in the width direction of the seat have the same internal pressure are deployed, the protrusion narrows the space around the occupant's legs, There is a risk of getting in the way.

上記の課題を解決するために、本発明は、降り動作のしやすさを確保し、膨張反力を必要以上に高めない乗り物用ニーエアバッグ装置を提供するものである。   In order to solve the above-described problems, the present invention provides a vehicle knee airbag device that ensures ease of dismounting operation and does not increase the expansion reaction force more than necessary.

上記の課題を解決するために、本発明の請求項１記載の乗り物用ニーエアバッグ装置は、ガスを発生可能なインフレータと、前記ガスにより膨張可能なるエアバッグとより少なくとも構成されてなる乗り物用ニーエアバッグ装置であって、膨張展開時の前記エアバッグには、乗員の脚部が入り込むことで前記エアバッグと連通可能なる副室を設けてなることを特徴とする。   In order to solve the above problems, a vehicle knee airbag device according to claim 1 of the present invention is for a vehicle comprising at least an inflator capable of generating gas and an airbag inflatable by the gas. The knee airbag device is characterized in that the airbag at the time of inflating and deploying is provided with a sub chamber that can communicate with the airbag when a leg portion of an occupant enters.

また、本発明の請求項２記載の乗り物用ニーエアバッグ装置は、請求項１記載の前記エアバッグと前記副室の通気穴とは、常時連通するように配設されてなり、前記通気穴には、前記通気穴を常時閉成してなるシャッターが配設されてなり、前記シャッターと前記エアバッグとには、吊り紐の両端部が固持されてなることを特徴とする。   According to a second aspect of the present invention, there is provided a vehicle knee airbag device, wherein the airbag according to the first aspect and the vent hole of the sub chamber are arranged so as to be in continuous communication with each other. Is provided with a shutter in which the vent hole is normally closed, and both ends of a hanging strap are fixed to the shutter and the airbag.

また、本発明の請求項３記載の乗り物用ニーエアバッグ装置は、請求項１又は請求項２に記載の前記エアバッグには、膨張展開時に乗員の脚部を挿入保持可能なる陥凹部が形成されてなることを特徴とする。   In the vehicle knee airbag device according to claim 3 of the present invention, the airbag according to claim 1 or 2 is formed with a recessed portion capable of inserting and holding a leg portion of an occupant during inflation and deployment. It is characterized by being made.

請求項１記載の発明によれば、膨張展開時の前記エアバッグの周囲には、乗員の脚部が入り込むことで前記エアバッグと連通可能なる副室を設けてなるため、乗り物への降り動作のしやすさを確保し、膨張反力を少なくした、という効果を奏する。   According to the first aspect of the present invention, since the sub-chamber that can communicate with the airbag is provided around the airbag at the time of inflation and deployment, the descending operation to the vehicle is performed. It has the effect of ensuring ease of handling and reducing the expansion reaction force.

また、請求項２記載の発明によれば、前記エアバッグと前記副室の通気穴とは、常時連通するように配設されてなり、前記通気穴には、前記通気穴を常時閉成してなるシャッターが配設されてなり、前記シャッターと前記エアバッグとには、吊り紐の両端部が固持されてなるため、乗員の挙動により吊り紐に荷重が加わることで、シャッターが動いて通気穴が開成し、エアバッグの内圧が低下する、という効果を奏する。   According to a second aspect of the present invention, the air bag and the vent hole of the sub chamber are arranged so as to communicate with each other at all times, and the vent hole is always closed. Since both ends of the suspension strap are held firmly to the shutter and the airbag, a load is applied to the suspension strap due to the behavior of the occupant, so that the shutter moves and ventilates. There is an effect that the hole is opened and the internal pressure of the airbag is reduced.

また、請求項３記載の発明によれば、前記エアバッグには、膨張展開時に乗員の脚部を挿入保持可能なる陥凹部が形成されてなるため、股開きが阻止される、という効果を奏する。   According to the invention described in claim 3, the airbag is formed with a recessed portion capable of inserting and holding the occupant's leg when inflated and deployed, so that the crotch opening is prevented. .

本発明の実施例１に係るニーエアバッグ装置のエアバッグが膨張展開した状態を示す側面図。The side view which shows the state which the airbag of the knee airbag apparatus which concerns on Example 1 of this invention inflate-deployed. 図１の矢視ＤＡに係る正面図。The front view which concerns on the arrow DA of FIG. 図１の膨張展開前のエアバッグとダミーとの関係を示す側面図。The side view which shows the relationship between the airbag before inflation deployment of FIG. 1, and a dummy. 図３のＳＥ−ＳＥ線に沿う断面図。Sectional drawing which follows the SE-SE line of FIG. 図４の矢視ＤＢに係る斜視図。The perspective view which concerns on arrow view DB of FIG. 図１の膨張展開後のエアバッグと前側に動いたダミーとの関係を示す側面図。The side view which shows the relationship between the airbag after the expansion | deployment of FIG. 1 and the dummy which moved to the front side. 図６のＳＦ−ＳＦ線に沿う断面図。Sectional drawing which follows the SF-SF line | wire of FIG. 図６の斜め後ろ側からの斜視図。The perspective view from the diagonal back side of FIG. 図７の矢視ＤＣに係る斜視図。The perspective view which concerns on arrow DC of FIG. 本発明の実施例２に係るニーエアバッグ装置のエアバッグが膨張展開した状態を示す図８相当図。FIG. 8 is a view corresponding to FIG. 8 showing a state where the airbag of the knee airbag device according to Embodiment 2 of the present invention is inflated and deployed. 図１０の矢視ＤＡに相当する図２相当正面図。FIG. 11 is a front view corresponding to FIG. 2 corresponding to the arrow DA in FIG. 10. 図１０の膨張展開後のエアバッグと前側に動いたダミーとの関係を示す正面図。The front view which shows the relationship between the airbag after the expansion | deployment of FIG. 10, and the dummy which moved to the front side.

以下、本発明の実施の形態について、詳細に説明する。本発明において、乗り物からの降り動作のしやすさを確保し、膨張反力を必要以上に高めない乗り物用ニーエアバッグ装置を提供するという目的を、ガスを発生可能なインフレータと、前記ガスにより膨張可能なるエアバッグとより少なくとも構成されてなる乗り物用ニーエアバッグ装置であって、膨張展開時の前記エアバッグの周囲には、乗員の脚部が入り込むことで前記エアバッグと連通可能なる副室を設けてなることで、実現した。以下、本発明の実施例を図面に基づいて説明する。   Hereinafter, embodiments of the present invention will be described in detail. In the present invention, it is an object of the present invention to provide a vehicle knee airbag device that ensures the ease of a descending operation from a vehicle and does not increase the expansion reaction force more than necessary. A vehicle knee airbag device comprising at least an inflatable airbag and an inflatable airbag, wherein a leg portion of an occupant enters the periphery of the airbag at the time of inflating and deploying so as to communicate with the airbag. Realized by providing a room. Embodiments of the present invention will be described below with reference to the drawings.

本発明の実施例１に係る構造を、図１〜図９を用いて説明する。乗り物の一例として自動車のインストルメントパネル１に配されてなる乗り物用ニーエアバッグ装置２は、衝突時など緊急時を検知してガスＧを発生可能なインフレータ６と、前記ガスＧにより膨張可能なるエアバッグ５とよりなる。膨張展開時の前記エアバッグ５の周囲、特に側部には、乗員の脚部に相当するダミー３の脚部３ａ、特に膝部３ｂが入り込むことで前記エアバッグ５と連通可能なる副室９を設けてなる。符号１３は、フロアである。前記ダミー３は、図示しない座席に着座した状態を示す。ダミー３のＨＰは、ヒップポイントである。６ａは、インフレータ６のガスＧの噴出口である。符号８は、インフレータ６をインストルメントパネル１に支持するボルトである。   A structure according to Embodiment 1 of the present invention will be described with reference to FIGS. A vehicle knee airbag device 2 disposed on an instrument panel 1 of an automobile as an example of a vehicle can be inflated by an inflator 6 capable of generating a gas G upon detecting an emergency such as a collision, and the gas G. It consists of an airbag 5. A sub-chamber 9 that can communicate with the airbag 5 by the legs 3a, particularly the knees 3b of the dummy 3 corresponding to the legs of the occupant entering the periphery of the airbag 5 at the time of inflating and deployment, particularly the side portions. Is provided. Reference numeral 13 denotes a floor. The dummy 3 shows a state of being seated on a seat (not shown). The HP of the dummy 3 is a hip point. 6 a is a gas G ejection port of the inflator 6. Reference numeral 8 denotes a bolt that supports the inflator 6 on the instrument panel 1.

前記副室９は、図７に示すように、膨張展開時の前記エアバッグ５の後面５ａより寸法Ｘ分前側ＦＲの位置に配設されてなる。ＲＲは、自動車の後側を示す。   As shown in FIG. 7, the sub chamber 9 is arranged at a position FR on the front side by a dimension X from the rear surface 5 a of the airbag 5 at the time of inflation and deployment. RR indicates the rear side of the automobile.

また、前記エアバッグ５と前記副室９の通気穴１０とは、常時連通するように配設されてなる。前記通気穴１０には、前記通気穴１０を常時閉成してなるシャッター４ａが配設されてなる。前記シャッター４ａと前記エアバッグ５とには、吊り紐４の両端部である固持部４ｂと、４ｃが固持されてなる。符号４ｄは、前記シャッター４ａの両端部を縫製支持してなる端部である。   Further, the airbag 5 and the vent hole 10 of the sub chamber 9 are arranged so as to always communicate. The vent hole 10 is provided with a shutter 4a that is always closed. The shutter 4a and the airbag 5 are held by holding portions 4b and 4c which are both ends of the hanging strap 4. Reference numeral 4d denotes an end portion formed by sewing and supporting both end portions of the shutter 4a.

また、前記エアバッグ５のダミー３に向かう面には、前記エアバッグ５の膨張展開時に乗員に相当するダミー３の脚部３ａ、特にその膝部３ｂを挿入保持可能なる陥凹部７、７が左右に形成されてなる。陥凹部７、７に相当する位置には、前記シャッター４ａ、４ａを両端に配設し、左右中央には、固持部４ｂを有する吊り紐４が配されている。   Further, on the surface of the airbag 5 facing the dummy 3, there are recessed portions 7, 7 that can insert and hold the leg portions 3a of the dummy 3, corresponding to the occupant, particularly the knee portions 3b, when the airbag 5 is inflated and deployed. It is formed on the left and right. The shutters 4a and 4a are disposed at both ends at positions corresponding to the recessed portions 7 and 7, and a hanging string 4 having a holding portion 4b is disposed at the left and right centers.

従って、本実施例１によれば、前記副室９、９は、膨張展開時の前記エアバッグ５の周囲には、乗員の脚部に相当するダミー３の脚部３ａ、特に膝部３ｂが入り込むことで前記エアバッグ５と連通可能なる副室９、９を設けてなるため、自動車からの降車のしやすさを確保し、膨張反力を必要以上高めない、という効果を奏する。   Therefore, according to the first embodiment, the sub chambers 9 and 9 have the leg 3a of the dummy 3 corresponding to the occupant's leg, particularly the knee 3b, around the airbag 5 when inflated and deployed. Since the sub-chambers 9 and 9 that can communicate with the airbag 5 by providing the air bag 5 are provided, it is possible to ensure the ease of getting off the vehicle and not to increase the expansion reaction force more than necessary.

また、本実施例１によれば、前記副室９、９は、膨張展開時の前記エアバッグ５の後面５ａより前側ＦＲの位置に配設されてなるため、自動車からの降車のしやすさを確保できる、という効果を奏する。仮に、前記副室９、９が前記エアバッグ５の後面５ａより後側ＲＲに突出しても、常時閉成されている通気穴１０を介したエアバッグ５と副室９、９との関係は、別体で構成されて元々エアバッグ５と副室９、９とには内圧差があることに加え、例えば降車しようとして一旦膝がエアバッグ５から離れると、エアバッグ５内部の吊り紐４と膝との干渉が無くなるため、エアバッグ５と副室９、９とを連通させていたシャッター４ａ、４ａの開放状態が再度閉成され、副室９、９へガスＧが流入しなくなって、更に、副室９、９の内圧は、エアバッグ５と比べて低いものとなる。このような状態の副室９、９が前記エアバッグ５の後面５ａより後側ＲＲ、つまり、乗員側へ突出していたと仮にしても、乗員の降車は妨げられることは無い。周知のベントホールでは無く、副室９にしたことによる顕著な効果は、エアバッグ５の反力を緩和させる点は同じであるが、ベントホールを仮にエアバッグ５の後側ＲＲの面に設ければ、乗員の手足や体が近くなり、高熱のガスＧにさらされることになるが、副室９なら高熱のガスＧにさらされず、熱対策をしなくてすむ分、原価低減になる。ベントホールを仮にエアバッグ５の側面に設ければ、ドアトリムやコンソールボックスが高熱のガスＧにさらされることになるが、副室９なら高熱のガスＧにさらされず、熱対策をしなくてすむ分、原価低減になる。   Further, according to the first embodiment, the sub chambers 9, 9 are disposed at the front FR position from the rear surface 5a of the airbag 5 at the time of inflating and deploying. Therefore, it is easy to get out of the automobile. The effect that can be secured. Even if the sub chambers 9 and 9 protrude from the rear surface 5a of the airbag 5 to the rear side RR, the relationship between the airbag 5 and the sub chambers 9 and 9 through the normally closed vent hole 10 is as follows. In addition to the difference in internal pressure between the airbag 5 and the sub chambers 9, 9, which is configured as a separate body, for example, when the knee is once separated from the airbag 5 in order to get off, the hanging strap 4 inside the airbag 5. Since there is no interference with the knee, the opened state of the shutters 4a and 4a that communicated the airbag 5 and the sub chambers 9 and 9 is closed again, and the gas G does not flow into the sub chambers 9 and 9. Furthermore, the internal pressure of the sub chambers 9 and 9 is lower than that of the airbag 5. Even if the sub-chambers 9 and 9 in such a state protrude from the rear surface 5a of the airbag 5 to the rear RR, that is, the occupant side, the passenger is not prevented from getting off. The remarkable effect of using the sub chamber 9 instead of the known vent hole is the same in that the reaction force of the airbag 5 is reduced, but the vent hole is temporarily provided on the surface of the rear RR of the airbag 5. As a result, the passenger's limbs and body are close to each other and exposed to the high-temperature gas G. However, if the sub-chamber 9 is not exposed to the high-temperature gas G, the cost can be reduced by not having to take measures against heat. If the vent hole is provided on the side surface of the airbag 5, the door trim and the console box are exposed to the hot gas G. However, if the sub chamber 9 is not exposed to the hot gas G, it is not necessary to take measures against heat. Cost reduction.

また、前記エアバッグ５と前記副室９、９の通気穴１０、１０とは、常時連通するように配設されてなり、前記通気穴１０、１０には、前記通気穴１０、１０を常時閉成してなるシャッター４ａ、４ａが配設されてなり、前記シャッター４ａ、４ａと前記エアバッグ５とには、吊り紐４の両端部が固持されてなるため、乗員の挙動により吊り紐４に荷重が加わることで、シャッター４ａ、４ａが動いて通気穴１０、１０が開成し、エアバッグ５の内圧が低下する、という効果を奏する。   Further, the airbag 5 and the vent holes 10 and 10 of the sub chambers 9 and 9 are arranged so as to always communicate, and the vent holes 10 and 10 are always connected to the vent holes 10 and 10. Closed shutters 4a and 4a are disposed, and both ends of the suspension strap 4 are held between the shutters 4a and 4a and the airbag 5, so that the suspension strap 4 is caused by the behavior of the occupant. As a result, the shutters 4a and 4a move to open the vent holes 10 and 10 and the internal pressure of the airbag 5 is reduced.

また、前記エアバッグ５には、膨張展開時に乗員の脚部に相当するダミー３の脚部３ａ、特に膝部３ｂを挿入保持可能なる陥凹部７、７が形成されてなるため、股開きが阻止される、という効果を奏する。更に、前記エアバッグ５の後面５ａからエアバッグ５の内部側に入り込んだ陥凹部７、７を設けたことで、乗員の膝部に相当するダミー３の膝部３ｂが吊り紐４に直接的な荷重を加えやすくなる、という効果も奏する。   Further, the airbag 5 is formed with recessed portions 7 and 7 that can insert and hold the leg portions 3a of the dummy 3, particularly the knee portions 3b, corresponding to the legs of the occupant when inflated and deployed. It has the effect of being blocked. Further, by providing the recessed portions 7 and 7 that enter the inner side of the airbag 5 from the rear surface 5a of the airbag 5, the knee portion 3b of the dummy 3 corresponding to the knee portion of the occupant is directly attached to the suspension strap 4. The effect that it becomes easy to apply a heavy load is also produced.

本発明の実施例２に係る構造を、図１０〜図１２を用いて説明する。乗り物の一例として自動車のインストルメントパネル１に配されてなる乗り物用ニーエアバッグ装置２は、衝突時など緊急時を検知してガスＧを発生可能なインフレータ６と、前記ガスＧにより膨張可能なるエアバッグ５とよりなる。膨張展開時の前記エアバッグ５の周囲、特に上部には、乗員の脚部に相当するダミー３の脚部３ａ、特に膝部３ｂが入り込むことで前記エアバッグ５と連通可能なる副室１１を設けてなる。前記ダミー３は、図示しない座席に着座した状態を示す。   A structure according to Embodiment 2 of the present invention will be described with reference to FIGS. A vehicle knee airbag device 2 disposed on an instrument panel 1 of an automobile as an example of a vehicle can be inflated by an inflator 6 capable of generating a gas G upon detecting an emergency such as a collision, and the gas G. It consists of an airbag 5. A sub-chamber 11 that can communicate with the airbag 5 by entering a leg 3a, particularly a knee 3b of a dummy 3 corresponding to a passenger's leg, enters the periphery of the airbag 5 when inflated and deployed. It is provided. The dummy 3 shows a state of being seated on a seat (not shown).

前記エアバッグ５と前記副室１１の通気穴とは、常時連通するように配設されてなる。前記通気穴には、前記通気穴を常時閉成してなるシャッター１２ａが配設されてなる。前記シャッター１２ａと前記エアバッグ５とには、吊り紐１２の両端部である固持部とが固持されてなる。   The airbag 5 and the vent hole of the sub chamber 11 are arranged so as to always communicate. The vent hole is provided with a shutter 12a formed by always closing the vent hole. The shutter 12a and the airbag 5 are held by holding portions that are both ends of the hanging strap 12.

従って、本実施例２によれば、膨張展開時の前記エアバッグ５の周囲には、乗員の脚部であるダミー３の脚部３ａ、特に膝部３ｂが入り込むことで前記エアバッグ５と連通可能なる副室１１を設けてなるため、自動車からの降車のしやすさを確保し、膨張反力を必要以上に高めない、という効果を奏する。   Therefore, according to the second embodiment, the leg portion 3a of the dummy 3, which is the leg portion of the occupant, particularly the knee portion 3b enters the periphery of the airbag 5 at the time of inflating and deploying to communicate with the airbag 5. Since the sub chamber 11 that can be used is provided, it is possible to secure the ease of getting off from the automobile and not to increase the expansion reaction force more than necessary.

前記実施例１及び２では、自動車に配されてなることを例にして説明したが、これに限定せず、飛行機や船舶、鉄道車両などの乗り物に配されても良い。   In the first and second embodiments, the description has been given by taking the case of being arranged in an automobile. However, the present invention is not limited to this, and it may be arranged in a vehicle such as an airplane, a ship, and a railway vehicle.

２ 乗り物用ニーエアバッグ装置
４、１２ 吊り紐
４ａ、１２ａ シャッター
５ エアバッグ
６ インフレータ
７ 陥凹部
９、１１ 副室
１０ 通気穴
Ｇ ガス
Ｘ 前後寸法 2 Vehicle knee airbag device 4, 12 Suspension strap 4a, 12a Shutter 5 Air bag 6 Inflator 7 Depressed recess 9, 11 Sub chamber 10 Vent hole G Gas X Front / rear dimensions

Claims (3)

ガスを発生可能なインフレータと、前記ガスにより膨張可能なるエアバッグとより少なくとも構成されてなる乗り物用ニーエアバッグ装置であって、
膨張展開時の前記エアバッグには、乗員の脚部が入り込むことで前記エアバッグと連通可能なる副室を設けてなることを特徴とする乗り物用ニーエアバッグ装置。 A vehicle knee airbag device comprising at least an inflator capable of generating gas and an airbag inflatable by the gas,
A vehicle knee airbag device, wherein the airbag at the time of inflating and deploying is provided with a sub-chamber capable of communicating with the airbag when a passenger's legs enter. 請求項１記載の乗り物用ニーエアバッグ装置であって、
前記エアバッグと前記副室の通気穴とは、常時連通するように配設されてなり、
前記通気穴には、前記通気穴を常時閉成してなるシャッターが配設されてなり、
前記シャッターと前記エアバッグとには、吊り紐の両端部が固持されてなることを特徴とする乗り物用ニーエアバッグ装置。 The vehicle knee airbag device according to claim 1,
The air bag and the vent hole of the sub chamber are arranged so as to always communicate,
The vent hole is provided with a shutter that is normally closed with the vent hole,
A knee airbag device for a vehicle, wherein both ends of a hanging strap are fixed to the shutter and the airbag. 請求項１又は請求項２記載の乗り物用ニーエアバッグ装置であって、
前記エアバッグには、膨張展開時に乗員の脚部を挿入保持可能なる陥凹部が形成されてなることを特徴とする乗り物用ニーエアバッグ装置。 The vehicle knee airbag device according to claim 1 or 2,
A knee airbag device for vehicles, wherein the airbag is formed with a recessed portion capable of inserting and holding a leg portion of an occupant during inflation and deployment.
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