JP2006062566A - Side air bag apparatus - Google Patents

Side air bag apparatus Download PDF

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JP2006062566A
JP2006062566A JP2004248714A JP2004248714A JP2006062566A JP 2006062566 A JP2006062566 A JP 2006062566A JP 2004248714 A JP2004248714 A JP 2004248714A JP 2004248714 A JP2004248714 A JP 2004248714A JP 2006062566 A JP2006062566 A JP 2006062566A
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airbag
vehicle
occupant
upper chamber
partition wall
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JP4229887B2 (en
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Hideho Fukuda
秀穂 福田
Akira Sekizen
陽 石前
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Autoliv Development AB
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a side air bag apparatus which covers the lower part of chest near the waist and the belly of an occupant by using an upper compartment. <P>SOLUTION: According to the side air bag apparatus 1, when a vehicle collides, an inflator 21 jets an inflating gas to an air bag 11 installed inside a seat back 2 to inflate and expand it between the side portion of the vehicle and the occupant 4 toward the front of the vehicle. The air bag 11 is separated into the upper compartment 12 and a lower compartment 13 via a separating part 5, which is so formed that its vehicle front side is below the vehicle rear side. Upon collision of the vehicle, the inflating gas jetted out from the inflator 21 forces the upper compartment 12 to overhang toward the lower chamber 13. When the air bag 11 expands, the upper compartment 12 covers the lower part of ribs and the surroundings of belly of the occupant so as to reduce damage to the lower part of chest and belly having ribs weaker than the hipbone. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、車両の衝突時、特に側面衝突時に乗員を保護するサイドエアバッグ装置に関するものである。   The present invention relates to a side airbag device that protects an occupant at the time of a vehicle collision, particularly at a side collision.

一般的に、車両のシートバックの下側部分周辺には、シートバックのリクラィニング機構やシートの位置調節機構などが内蔵されている。特に電動リクライニング機構にはモーターなどが使用されるため、シートバックの下側部分周辺の大きなスペースがこれらリクライニング機構などによって占められる。   Generally, a seat back reclining mechanism, a seat position adjusting mechanism, and the like are built in the vicinity of a lower portion of a vehicle seat back. In particular, since an electric reclining mechanism uses a motor or the like, a large space around the lower portion of the seat back is occupied by these reclining mechanisms.

また、車両のシートバック側部には、それら以外に車両の衝突時にその側面を保護する為にサイドエアバッグが装備されることも多い。
特開２００３−１８２４９９号公報 In addition to the above, side airbags are often provided on the side portions of the vehicle seat back to protect the side surfaces in the event of a vehicle collision.
JP 2003-182499 A

しかしながら、前記特許文献１で提案された従来の技術では、車両のシートに着座した乗員の胸部肋骨の内、腰部に近い下部の肋骨まで、胸部保護用の上部室で完全にカバーすることができていなかった。   However, in the conventional technique proposed in the above-mentioned Patent Document 1, it is possible to completely cover the chest rib of the occupant seated on the vehicle seat to the lower rib close to the waist with the upper chamber for protecting the chest. It wasn't.

従って、サイドエアバッグの展開時には、当該乗員の腰部に近い下部の肋骨や腹部周辺は、腰部保護用の下部室でカバーされることになり、高い圧力が作用することになる。このため、腰骨より脆弱な肋骨を有する胸部下方や腹部へのダメージが大きくなり、それらの部分の障害値が高くなってしまうという問題があった。   Therefore, when the side airbag is deployed, the lower ribs and the abdominal area near the occupant's lower back are covered with the lower chamber for protecting the lower back, and high pressure acts. For this reason, there has been a problem that damage to the lower part of the chest and the abdomen having ribs more fragile than the hip bone is increased, and the obstacle value of those parts is increased.

すなわち、本発明が解決しようとする問題点は、従来のサイドエアバッグ装置では、乗員の腰部に近い胸部下方や腹部を上部室でカバーすることができないので、当該部へのダメージが大きくなるという点である。   That is, the problem to be solved by the present invention is that the conventional side airbag device cannot cover the lower part of the chest and the abdomen near the occupant's lower back with the upper chamber, so that the damage to the part increases. Is a point.

本発明のサイドエアバッグ装置は、このような観点からなされたもので、
エアバッグ自体の構造をシンプルにして、エアバッグの製作工数の増加を防止するとともに、胸部の肋骨部分全体は低圧の上部室によって保護しつつ、腰部は高圧の下部室によって保護できるように、乗員の広範囲な部位の保護と部位に応じたエアバッグ内の圧力設定を可能とするものである。 The side airbag device of the present invention is made from such a viewpoint,
The structure of the airbag itself is simplified to prevent an increase in the number of airbag manufacturing steps, and the entire ribs of the chest are protected by the low pressure upper chamber while the lumbar region can be protected by the high pressure lower chamber. It is possible to protect a wide range of parts and to set the pressure in the airbag according to the parts.

すなわち、本発明のサイドエアバッグ装置は、
シートバックの内部に設置され、車両の衝突時、エアバッグの後端部に内蔵されたインフレーターから膨張ガスを噴射し、当該エアバッグを車両側部と乗員の間の車両前方方向に膨出展開させて乗員を保護するサイドエアバッグ装置であって、
前記エアバッグは、少なくとも２つに区画された室と、当該の室を区画する分離部とを備え、
前記分離部は、隔壁と縫合部とを連結させた構造である点を、
または、
シートバックの内部に設置され、車両の衝突時、エアバッグの後端部に内蔵されたインフレーターから膨張ガスを噴射し、当該エアバッグを車両側部と乗員の間の車両前方方向に膨出展開させて乗員の胸部と腰部とを保護するサイドエアバッグ装置であって、
前記エアバッグは、胸部保護用の上部室と、当該上部室よりも高圧の腰部保護用の下部室と、当該上部室と下部室とを区画する分離部とを備え、
前記分離部は車両の前方側が後方側より下方となるように設けられ、前記上部室が、前記エアバッグ展開時に当該乗員の胸部肋骨全てを保護するように前記下部室側に張り出す構造となされている点を最も主要な特徴としている。 That is, the side airbag device of the present invention is
Installed inside the seat back and inflated from an inflator built into the rear end of the airbag in the event of a vehicle collision, and the airbag is inflated and deployed in the forward direction between the vehicle side and the occupant A side airbag device that protects an occupant,
The airbag includes at least two chambers, and a separation unit that divides the chambers,
The separation part has a structure in which a partition wall and a stitching part are connected.
Or
Installed inside the seat back and inflated from an inflator built into the rear end of the airbag in the event of a vehicle collision, and the airbag is inflated and deployed in the forward direction between the vehicle side and the occupant A side airbag device that protects the chest and waist of the occupant,
The airbag includes an upper chamber for protecting the chest, a lower chamber for protecting the lower back that is higher in pressure than the upper chamber, and a separation unit that divides the upper chamber and the lower chamber,
The separation portion is provided so that the front side of the vehicle is below the rear side, and the upper chamber projects to the lower chamber side so as to protect all the chest ribs of the occupant when the airbag is deployed. This is the main feature.

本発明によれば、たとえば上部室と下部室を区画する分離部を車両の前方側が後方側より下方となるように設け、エアバッグ展開時に乗員の胸部肋骨全てを保護するように上部室が下部室側に張り出すようにすることで、エアバッグの展開時には、当該乗員の腰部に近い下部の肋骨や腹部周辺も上部室でカバーされ、腰骨より脆弱な肋骨を有する胸部下方や腹部へのダメージが小さくなる。   According to the present invention, for example, the separation section that divides the upper chamber and the lower chamber is provided so that the front side of the vehicle is below the rear side, and the upper chamber is positioned so as to protect all the occupant's chest ribs when the airbag is deployed. By projecting to the room side, when the airbag is deployed, the lower ribs and abdominal area near the lumbar region of the occupant are also covered by the upper chamber, and damage to the lower part of the chest and the abdomen with ribs that are more fragile than the hipbone Becomes smaller.

以下、本発明の実施形態の一例について、図１〜図６を用いて説明する。図１は本実施例のサイドエアバッグ装置のエアバッグが膨出展開した状態における乗員、エアバッグ、インフレーターの関連位置を示す側面図である。   Hereinafter, an example of an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side view showing relevant positions of an occupant, an airbag, and an inflator in a state where the airbag of the side airbag device of the present embodiment is inflated and deployed.

１は、シートバック２の内部に設置された本実施例のサイドエアバッグ装置である。車両の衝突時、特に側面衝突時に、このサイドエアバッグ装置１は、座席３に着座し、前記シートバック２に体を預けた乗員４と車両側部（図示省略）の間にエアバッグ１１を車両前方方向（図１におけるＦ矢印方向）に膨出展開し、乗員４を保護するものである。   Reference numeral 1 denotes a side airbag device of the present example installed inside a seat back 2. At the time of a vehicle collision, particularly when a side collision occurs, the side airbag device 1 is seated on a seat 3 and an airbag 11 is placed between the occupant 4 who has left the body in the seat back 2 and the vehicle side (not shown). It bulges and expands in the vehicle forward direction (direction of arrow F in FIG. 1) to protect the occupant 4.

本実施例のサイドエアバッグ装置１のエアバッグ１１は、後述するように隔壁１４と縫合部１５からなる分離部５によって乗員４の胸部側方に膨出展開する上部室１２と、乗員４の腰部側方に膨出展開する下部室１３とに区画される。インフレーター２１は、このエアバッグ１１の後端部１１ａに上下方向に立てて内蔵されている。分離部５は、エアバッグ１１の膨出展開時、上部室１２が下部室１３側に張り出し、乗員４の下部の肋骨４ａまでもが保護できるように、車両の前方側が後方側より下方となるように設けられている。   As will be described later, the airbag 11 of the side airbag device 1 of the present embodiment includes an upper chamber 12 that bulges and expands to the side of the chest of the occupant 4 by a separation unit 5 including a partition wall 14 and a stitching unit 15, It is partitioned into a lower chamber 13 that bulges and expands to the side of the waist. The inflator 21 is built in the rear end portion 11a of the airbag 11 in a vertical direction. When the airbag 11 is inflated and deployed, the separation unit 5 is such that the upper side of the vehicle is lower than the rear side so that the upper chamber 12 protrudes toward the lower chamber 13 and even the rib 4a below the occupant 4 can be protected. It is provided as follows.

前記インフレーター２１は、図２に示したように筒状をなし、その側面に設けた噴出口２１ａから前記上部室１２に膨張ガスを、また、その下端内部に設けた噴出口２１ｂから前記下部室１３に膨張ガスを噴出する構成となっており、固定用の取付けボルト２２がシートバック２の幅方向に２本突き出ている。   The inflator 21 has a cylindrical shape as shown in FIG. 2, and expands gas from the jet port 21a provided on the side surface to the upper chamber 12, and from the jet port 21b provided in the lower end thereof to the lower chamber. 13 is configured to eject the expansion gas, and two fixing bolts 22 for fixing protrude in the width direction of the seat back 2.

このインフレーター２１の本体の主なガス噴出部を、下方にある噴出口２１ｂの近傍に配置することにより、各噴出口２１ａ，２１ｂから噴出される膨張ガスの噴出量を変えて各室１２，１３に供給されるガス量を調節し、各室１２，１３の内圧を設定することができる。また、たとえばインフレーター２１の各噴出口２１ａ，２１ｂから上部室１２と下部室１３の各室へ供給される膨張ガスに加えて、上部室１２と下部室１３の容積を変えることにより、それぞれの室１２，１３の展開時の内圧を設計することができる。   By disposing the main gas ejection part of the main body of the inflator 21 in the vicinity of the lower ejection port 21b, the amount of the expanded gas ejected from each ejection port 21a, 21b is changed to each chamber 12, 13 The internal pressure of each of the chambers 12 and 13 can be set by adjusting the amount of gas supplied to. Further, for example, by changing the volumes of the upper chamber 12 and the lower chamber 13 in addition to the inflation gas supplied from the respective outlets 21a and 21b of the inflator 21 to the respective chambers of the upper chamber 12 and the lower chamber 13, the respective chambers are changed. The internal pressure at the time of deployment of 12, 13 can be designed.

これらにより、それぞれの室１２，１３の展開時の内圧設定を容易に行うことができ、加えて設計に自由度が増すので、インフレーター２１を他のエアバッグにも使用できる可能性が広がり、その共通化が図れることになる。   As a result, it is possible to easily set the internal pressure when the chambers 12 and 13 are deployed, and the degree of freedom in design is increased, so that the possibility of using the inflator 21 for other airbags is expanded. Sharing will be possible.

上部室１２と下部室１３の容積は、これら両室１２，１３を上下に区画している隔壁１４の設置高さ位置や隔壁１４の幅などを変えることによっても変更が可能である。隔壁１４の設置高さ位置が変わってもこれに応じて縫合部１５の長さや幅を変えることで種々の圧力のバリエーションに対応できる。   The volumes of the upper chamber 12 and the lower chamber 13 can also be changed by changing the installation height position of the partition wall 14 dividing the chambers 12 and 13 in the vertical direction, the width of the partition wall 14, and the like. Even if the installation height position of the partition wall 14 changes, it is possible to cope with various pressure variations by changing the length and width of the stitching portion 15 accordingly.

図３は本実施例のサイドエアバッグ装置１がシートバック２の内部に設置された状態を上方から見た断面図である。インフレーター２１は、エアバッグ１１の後端部１１ａにて包み巻き込まれるようにしてエアバッグ１１に内蔵されている。サイドエアバッグ装置１は、インフレーター２１とエアバッグ１１との間に、前記後端部１１ａを介在させた状態で、装置取付け部材３１に取付けボルト２２とナット３２で固定されている。この設置状態で、うず巻き状又は折り畳まれた状態のエアバッグ１１が膨出展開される方向は、Ｆ矢印で示す車両前方方向と一致している。   FIG. 3 is a cross-sectional view of the state in which the side airbag device 1 of the present embodiment is installed inside the seat back 2 as viewed from above. The inflator 21 is built in the airbag 11 so as to be wrapped and wrapped around the rear end portion 11 a of the airbag 11. The side airbag device 1 is fixed to the device mounting member 31 with mounting bolts 22 and nuts 32 with the rear end portion 11 a interposed between the inflator 21 and the airbag 11. In this installed state, the direction in which the airbag 11 in a spiral or folded state is inflated and deployed coincides with the vehicle front direction indicated by the F arrow.

図４は本実施例のサイドエアバッグ装置１の好ましいエアバッグ１１の詳細の一例を示す側面囲であり、前記と同様、Ｆ矢印は車両前方方向を示す。また、図５は本実施例のサイドエアバッグ装置１の図４に基づくエアバッグ１１を示す断面図であり、（ａ）は図４のＡ−Ａ断面図、（ｂ）は図４のＢ−Ｂ断面図である。   FIG. 4 is a side wall view showing an example of the details of a preferred airbag 11 of the side airbag device 1 of the present embodiment, and the F arrow indicates the vehicle front direction as described above. 5 is a cross-sectional view showing the airbag 11 based on FIG. 4 of the side airbag device 1 of the present embodiment, where (a) is a cross-sectional view taken along the line AA in FIG. 4, and (b) is B in FIG. It is -B sectional drawing.

以下、本実施例のサイドエアバッグ装置１の主要な構成要素であるエアバッグ１１について詳細に説明する。
エアバッグ１１は対向する２枚の基布１６の、エアバッグ１１の前記後端部１１ａを除いた全周囲を縫合して袋状に形成したものである。このエアバッグ１１を上下方向に立てた状態で前記インフレーター２１が、エアバッグ１１の後端部１１ａにて包み込まれるようにして内蔵されている。 Hereinafter, the airbag 11 which is a main component of the side airbag device 1 of the present embodiment will be described in detail.
The airbag 11 is formed in a bag shape by stitching the entire periphery of two opposing base fabrics 16 excluding the rear end portion 11a of the airbag 11. The inflator 21 is built in such a manner that the airbag 11 is wrapped in the rear end portion 11a of the airbag 11 in a state where the airbag 11 is erected in the vertical direction.

そして、本実施例では、エアバッグ１１は、分離部５によって上部室１２と下部室１３に区画されている。この分離部５は、隔壁１４と縫合部１５とで構成されている。隔壁１４は、前記対向する２枚の左右の基布１６に縫合され、エアバッグ１１の前方内壁１１ｂから車両後方に延設される。縫合部１５は、前記隔壁１４の後端部１４ａと前記インフレーター２１間を、前記対向する２枚の基布１６同士を密着させて縫合している。   In the present embodiment, the airbag 11 is partitioned into an upper chamber 12 and a lower chamber 13 by the separation unit 5. The separation unit 5 includes a partition wall 14 and a stitching unit 15. The partition wall 14 is stitched to the two opposing left and right base fabrics 16 and extends from the front inner wall 11b of the airbag 11 to the rear of the vehicle. The stitching portion 15 is stitched between the rear end portion 14a of the partition wall 14 and the inflator 21 with the two opposing base fabrics 16 in close contact with each other.

ところで、この縫合部１５は、ミシンでの縫製作業性を加味して本例では所要の面積を有する小判形状としている。また、前方斜め下方側へ傾いて配置し、車両前方側の前端部１５ａを前記隔壁１４の後端部１４ａと連結している。また、この縫合部１５の後端部１５ｂは前記インフレーター２１の上下幅以内の所定位置で前記インフレーター２１に接するか、または近接して配置する。   By the way, the stitching portion 15 has an oval shape having a required area in this example in consideration of sewing workability with a sewing machine. In addition, the front end 15a on the front side of the vehicle is connected to the rear end 14a of the partition wall 14 so as to be inclined obliquely downward and forward. Further, the rear end portion 15b of the stitching portion 15 is disposed in contact with or close to the inflator 21 at a predetermined position within the vertical width of the inflator 21.

この縫合部１５は、エアバッグ１１が膨張する過程で膨張ガスによる圧力が前記隔壁１４に瞬間的に負荷された際、これに耐え切れずに隔壁１４がその後端部１４ａから裂けるのを防止するために設置したものである。そのために本実施例では、膨張ガスの圧力に十分耐える縫合面積を有する丈夫な縫合部１５を隔壁１４の後端部１４ａに接続させているのである。   When the pressure due to the inflation gas is momentarily applied to the partition wall 14 during the process of inflating the airbag 11, the stitching portion 15 prevents the partition wall 14 from tearing from the rear end portion 14a without being able to withstand this. It was set up for this purpose. Therefore, in this embodiment, a strong stitching portion 15 having a stitching area that can sufficiently withstand the pressure of the inflation gas is connected to the rear end portion 14a of the partition wall 14.

以上の構成を有する本発明のサイドエアバック装置１の作用を以下に説明する。
図１に示すように、本実施例では、インフレーター２１はシートバック２の中ほどの位置に配置されている。このインフレーター２１に向けて隔壁１４を車両前方側から直線状に上り勾配を持たせて縫合した場合は、下方に位置する肋骨４ａが高圧の下部室１３によって保護されることになり、エアバッグ１１の展開により当該部分の肋骨４ａがダメージを受ける可能性がある。このダメージを小さくするためには、上部室１２によってのみ胸部（肋骨４ａ）を保護する構造とする必要がある。一方、展開時に十分に乗員４を保護する為には、もともと小さなエアバッグ１１の展開時の内容積を十分に得る必要がある。その為、できるだけ内容積を大きくするために、上下室１２，１３の区画には隔壁１４を用いることが望ましい。 The operation of the side airbag device 1 of the present invention having the above configuration will be described below.
As shown in FIG. 1, in the present embodiment, the inflator 21 is disposed at the middle position of the seat back 2. When the partition wall 14 is stitched toward the inflator 21 with a straight upward slope from the front side of the vehicle, the rib 4a located below is protected by the high pressure lower chamber 13, and the airbag 11 There is a possibility that the rib 4a of the part is damaged by the development of. In order to reduce this damage, it is necessary to have a structure that protects the chest (rib 4a) only by the upper chamber 12. On the other hand, in order to sufficiently protect the occupant 4 during deployment, it is necessary to obtain a sufficient internal volume when the small airbag 11 is originally deployed. Therefore, in order to increase the internal volume as much as possible, it is desirable to use the partition wall 14 in the compartments of the upper and lower chambers 12 and 13.

隔壁１４を下方の肋骨４ａにかからないようにするためには、乗員４の略腰部側方に膨出展開する下部室１３は前記インフレーター２１に対して下方側に位置することになる。従って、エアバッグ１１を上部室１２と下部室１３とに区画する隔壁１４も同様にインフレーター２１に対しては、比較的下方側に位置することになる。   In order to prevent the partition wall 14 from covering the lower rib 4 a, the lower chamber 13 that bulges and expands substantially to the side of the waist of the occupant 4 is positioned below the inflator 21. Accordingly, the partition wall 14 that divides the airbag 11 into the upper chamber 12 and the lower chamber 13 is also positioned relatively downward with respect to the inflator 21.

この隔壁１４に対し比較的上方に位置しているインフレーター２１からの膨張ガスを確実に下部室１３に供給するためには、隔壁１４の後端側をインフレーター２１に向けて折り曲げて縫合する必要がある。   In order to reliably supply the expansion gas from the inflator 21 positioned relatively above the partition wall 14 to the lower chamber 13, it is necessary to bend and sew the rear end side of the partition wall 14 toward the inflator 21. is there.

しかしながら、隔壁１４の後端側をインフレーター２１に向けて折り曲げて縫合することは極めて困難で、多くの製作工数が必要になってコスト高になる。そこで、隔壁１４の後端を折り曲げる代わりに縫合部１５によって全体として分離部５が屈曲するようにしている。これにより、エアバッグ１１の必要な内容積を得ながら、上部室１２が下部室１３に張り出して形成でき、さらに本実施例では示していないが、必要ならばどの様な形状にも区画することができる。   However, it is extremely difficult to bend and sew the rear end side of the partition wall 14 toward the inflator 21, which requires a large number of manufacturing steps and increases the cost. Therefore, instead of bending the rear end of the partition wall 14, the separating portion 5 is bent as a whole by the stitching portion 15. Thereby, while obtaining the required internal volume of the airbag 11, the upper chamber 12 can be formed so as to protrude into the lower chamber 13, and although not shown in this embodiment, it can be partitioned into any shape if necessary. Can do.

つまり、本実施例では、前記縫合部１５の長さ、角度、大きさなどを自在に設定することで、隔壁１４とインフレーター２１の間の高さの差が大きくなっても、これら両者１４，２１に跨って縫合部１５を配置することができるばかりでなく、さらに分離部５をどの様な形状にも設計できる。場合によっては、ジグザグ形状なども可能である。   That is, in this embodiment, even if the height difference between the partition wall 14 and the inflator 21 is increased by setting the length, angle, size, etc. of the stitching portion 15 freely, In addition to being able to arrange the stitching portion 15 across 21, the separating portion 5 can be designed in any shape. In some cases, a zigzag shape or the like is also possible.

インフレーター２１は、シートバック２の中ほどに配置されており、エアバッグ１１の乗員４の腰部側方に膨出展開する。   The inflator 21 is disposed in the middle of the seat back 2 and bulges and expands to the side of the waist of the occupant 4 of the airbag 11.

インフレーター２１に接するか、または近接して、前方斜め下方側へ傾いて配置した縫合部１５と、それに連結された隔壁１４とによってエアバッグ１１は２室に分割され、インフレーター２１の噴出口２１ｂから噴射された膨張ガスは下部室１３に、また、インフレーター２１の噴出口２１ａから噴射された膨張ガスは上部室１２にそれぞれ分配供給される。   The airbag 11 is divided into two chambers by a stitching portion 15 that is in contact with or in close proximity to the inflator 21 and is inclined obliquely forward and downward, and a partition wall 14 connected thereto. The injected expanded gas is distributed and supplied to the lower chamber 13, and the expanded gas injected from the outlet 21 a of the inflator 21 is distributed and supplied to the upper chamber 12.

前記本発明のサイドエアバッグ装置１を採用すれば、胸部に比べて比較的強い荷重でも受けることが可能な腰部の側方に膨出展開する下部室１３の膨張ガス内圧を、胸部の側方に膨出展開する上部室１２の膨張ガス内圧よりも高く設定することが容易に行えるようになる。   If the side airbag device 1 of the present invention is adopted, the inflation gas internal pressure of the lower chamber 13 that bulges and expands to the side of the waist that can be received even with a relatively strong load compared to the chest is applied to the side of the chest. It becomes easy to set the pressure higher than the expansion gas internal pressure of the upper chamber 12 bulging and expanding.

この際、図４に示されているように、胸部側方に膨出展開する上部室１２の上方にエアバッグ１１の外部と連通する通気ロ１１ｃを設けておけば、乗員４の胸部に対して、上部室１２の膨張ガス内圧を膨出展開後すぐに外へ逃がして柔らかく保護できるようになる。   At this time, as shown in FIG. 4, if an air vent 11 c that communicates with the outside of the airbag 11 is provided above the upper chamber 12 that bulges and expands to the side of the chest, As a result, the inflation gas internal pressure in the upper chamber 12 can be released to the outside immediately after bulging and deployed to be protected softly.

図６は図４と同様に本実施例のサイドエアバッグ装置１のより好ましいエアバッグ１１の詳細の一例を示す側面図である。この図６に示した例では、エアバッグ１１の内部に設けた隔壁１４の途中に、上部室１２と下部室１３の相互に連通する連通孔１４ｂを設けている。この連通孔１４ｂは、エアバッグ１１の膨出展開直後の上部室１２と下部室１３の膨張ガス内圧の差を、微調整する場合に有用となる。   FIG. 6 is a side view showing an example of the details of the more preferred airbag 11 of the side airbag device 1 of the present embodiment, as in FIG. In the example shown in FIG. 6, a communication hole 14 b communicating with the upper chamber 12 and the lower chamber 13 is provided in the middle of the partition wall 14 provided inside the airbag 11. The communication hole 14b is useful for finely adjusting the difference in the inflation gas internal pressure between the upper chamber 12 and the lower chamber 13 immediately after the airbag 11 is inflated and deployed.

以上説明したように、本発明のサイドエアバッグ装置１は、上部室１２と下部室１３を区画する分離部５を車両の前方側が後方側より下方となるように設けることで、エアバッグ１１の展開時には、乗員４の下部の肋骨４ａや腹部周辺も上部室１２でカバーされ、腰骨より脆弱な肋骨４ａを有する胸部下方や腹部へのダメージを小さくできる。   As described above, the side airbag device 1 according to the present invention provides the separation portion 5 that divides the upper chamber 12 and the lower chamber 13 so that the front side of the vehicle is below the rear side. At the time of deployment, the ribs 4a and the abdomen around the lower part of the occupant 4 are also covered with the upper chamber 12, and damage to the chest lower part and the abdomen having the ribs 4a more fragile than the hips can be reduced.

そして、隔壁１４の配置位置高さや隔壁１４の幅の変更による上部室１２と下部室１３の容積を変えることによって、部位に応じたエアバッグ１１内の膨張ガス内圧の設定も容易に行うことができる。   Then, by changing the volume of the upper chamber 12 and the lower chamber 13 by changing the arrangement position height of the partition wall 14 or the width of the partition wall 14, it is possible to easily set the inflation gas internal pressure in the airbag 11 according to the site. it can.

本発明は上記の例に限らず、各請求項に記載された技術的思想の範囲内で、適宜実施の形態を変更しても良いことは言うまでもない。たとえば、縫合部１５の形状は、同様の作用効果を奏するものであれば、小判状に限らないなどである。   The present invention is not limited to the above example, and it goes without saying that the embodiment may be appropriately changed within the scope of the technical idea described in each claim. For example, the shape of the stitching portion 15 is not limited to an oval shape as long as the same effect is obtained.

以上の本発明は、上下２室に区画するものに限らず、保護すべき部位に応じて区画する位置や数を変更したものにも適用できる。   The present invention as described above is not limited to the one divided into upper and lower two chambers, but can be applied to a case where the position and the number of the compartments to be protected are changed according to the parts to be protected.

本発明のサイドエアバッッグ装置のエアバッグが膨出展開した状態を示す側面図である。It is a side view which shows the state which the airbag of the side airbag apparatus of this invention bulged and expanded. インフレーターの斜視図である。It is a perspective view of an inflator. 本発明のサイドエアバッグ装置がシートバック内部に設置された状態を上方から見た断面図である。It is sectional drawing which looked at the state by which the side airbag apparatus of this invention was installed in the seat back from upper direction. 本発明のサイドエアバッグ装置のエアバッグの詳細を示す側面図である。It is a side view which shows the detail of the airbag of the side airbag apparatus of this invention. 本発明のサイドエアバッグ装置のエアバッグを示す断面図であり、（ａ）は図４のＡ−Ａ断面図、（ｂ）は図４のＢ−Ｂ断面図である。It is sectional drawing which shows the airbag of the side airbag apparatus of this invention, (a) is AA sectional drawing of FIG. 4, (b) is BB sectional drawing of FIG. 本発明のサイドエアバッグ装置のエアバッグの他の例の詳細を示す側面図である。It is a side view which shows the detail of the other example of the airbag of the side airbag apparatus of this invention.

符号の説明Explanation of symbols

１ サイドエアバッグ装置
２ シートバック
４ 乗員
５ 分離部
１１ エアバッグ
１１ａ 後端部
１２ 上部室
１３ 下部室
１４ 隔壁
１５ 縫合部
２１ インフレーター
２１ａ，２１ｂ 噴出口
３１ 装置取付け部材
DESCRIPTION OF SYMBOLS 1 Side airbag apparatus 2 Seat back 4 Crew 5 Separation part 11 Air bag 11a Rear end part 12 Upper chamber 13 Lower chamber 14 Partition 15 Stitching part 21 Inflator 21a, 21b Spout 31 Equipment attachment member

Claims (7)

シートバックの内部に設置され、車両の衝突時、エアバッグの後端部に内蔵されたインフレーターから膨張ガスを噴射し、当該エアバッグを車両側部と乗員の間の車両前方方向に膨出展開させて乗員の胸部と腰部とを保護するサイドエアバッグ装置であって、
前記エアバッグは、胸部保護用の上部室と、当該上部室よりも高圧の腰部保護用の下部室と、当該上部室と下部室とを区画する分離部とを備え、
前記分離部は車両の前方側が後方側より下方となるように設けられ、前記上部室が、前記エアバッグ展開時に当該乗員の胸部肋骨全てを保護するように前記下部室側に張り出す構造となされていることを特徴とするサイドエアバッグ装置。 Installed inside the seat back and inflated from an inflator built into the rear end of the airbag in the event of a vehicle collision, and the airbag is inflated and deployed in the forward direction between the vehicle side and the occupant A side airbag device that protects the chest and waist of the occupant,
The airbag includes an upper chamber for protecting the chest, a lower chamber for protecting the lower back that is higher in pressure than the upper chamber, and a separation unit that divides the upper chamber and the lower chamber,
The separation portion is provided so that the front side of the vehicle is below the rear side, and the upper chamber projects to the lower chamber side so as to protect all the chest ribs of the occupant when the airbag is deployed. A side airbag device characterized by comprising: 前記分離部は、隔壁と縫合部を連結させた構造であることを特徴とする請求項１に記載のサイドエアバッグ装置。   The side airbag device according to claim 1, wherein the separation part has a structure in which a partition wall and a stitching part are connected. 前記隔壁は、前記縫合部に対して当該車両の前方側に配置されていることを特徴とする請求項２に記載のサイドエアバッグ装置。   The side airbag device according to claim 2, wherein the partition wall is disposed on the front side of the vehicle with respect to the stitched portion. 前記分離部は、前記隔壁と前記縫合部の連結部を境に折れ曲がっていることを特徴とする請求項２又は３に記載のサイドエアバッグ装置。   4. The side airbag device according to claim 2, wherein the separation portion is bent at a connection portion between the partition wall and the stitching portion. 5. 前記上部室に外部と連通する通気口を設けたことを特徴とする請求項１〜４のいずれかに記載のサイドエアバッグ装置。   The side airbag device according to any one of claims 1 to 4, wherein a vent hole communicating with the outside is provided in the upper chamber. 前記上部室と前記下部室とを連通する連通孔を前記分離部に設けたことを特徴とする請求項１〜５のいずれかに記載のサイドエアバッグ装置。   The side airbag device according to claim 1, wherein a communication hole that communicates the upper chamber and the lower chamber is provided in the separation portion. シートバックの内部に設置され、車両の衝突時、エアバッグの後端部に内蔵されたインフレーターから膨張ガスを噴射し、当該エアバッグを車両側部と乗員の間の車両前方方向に膨出展開させて乗員を保護するサイドエアバッグ装置であって、
前記エアバッグは、少なくとも２つに区画された室と、当該の室を区画する分離部とを備え、
前記分離部は、隔壁と縫合部とを連結させた構造であることを特徴とするサイドエアバッグ装置。
Installed inside the seat back and inflated from an inflator built into the rear end of the airbag in the event of a vehicle collision, and the airbag is inflated and deployed in the forward direction between the vehicle side and the occupant A side airbag device for protecting an occupant,
The airbag includes at least two chambers, and a separation unit that divides the chambers,
The separation part has a structure in which a partition wall and a stitching part are connected to each other.
JP2004248714A 2004-08-27 2004-08-27 Side airbag device Expired - Fee Related JP4229887B2 (en)

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JP2009241687A (en) * 2008-03-31 2009-10-22 Autoliv Development Ab Airbag device
JP2010163142A (en) * 2009-01-19 2010-07-29 Tk Holdings Inc Side airbag and side airbag device
JP2010535121A (en) * 2007-04-09 2010-11-18 オートリブ ディベロップメント エービー Airbag for vehicle occupant protection
JP2014019304A (en) * 2012-07-18 2014-02-03 Autoliv Development Ab Side air bag device
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JP2010535121A (en) * 2007-04-09 2010-11-18 オートリブ ディベロップメント エービー Airbag for vehicle occupant protection
JP2009241687A (en) * 2008-03-31 2009-10-22 Autoliv Development Ab Airbag device
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