JP2004268682A - Air bag device for side collision - Google Patents

Air bag device for side collision Download PDF

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Publication number
JP2004268682A
JP2004268682A JP2003060107A JP2003060107A JP2004268682A JP 2004268682 A JP2004268682 A JP 2004268682A JP 2003060107 A JP2003060107 A JP 2003060107A JP 2003060107 A JP2003060107 A JP 2003060107A JP 2004268682 A JP2004268682 A JP 2004268682A
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JP
Japan
Prior art keywords
gas
chamber
upper chamber
gas distributor
airbag
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2003060107A
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Japanese (ja)
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JP4103633B2 (en
Inventor
Kazuhiko Jojima
和彦 城島
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Takata Corp
Original Assignee
Takata Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Takata Corp filed Critical Takata Corp
Priority to JP2003060107A priority Critical patent/JP4103633B2/en
Priority to US10/667,463 priority patent/US7168733B2/en
Priority to CNB031327028A priority patent/CN1329228C/en
Priority to EP03024429A priority patent/EP1433667A3/en
Publication of JP2004268682A publication Critical patent/JP2004268682A/en
Application granted granted Critical
Publication of JP4103633B2 publication Critical patent/JP4103633B2/en
Anticipated expiration legal-status Critical
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an air bag device for a side collision capable of keeping gas pressure within a lower chamber to high pressure for a sufficiently long period. <P>SOLUTION: The inside of an air bag 1 is divided into the lower chamber 1a on a lower side and an upper chamber 1b on an upper side by seam 2. A vent hole 5 is provided in the upper chamber 1a. A rear end of the seam 2 is slightly isolated from a rear end of the air bag 1. A gas distributor 6 is provided in a separating part of the seam 2 and the rear end of the air bag 1. The gas distributor 6 has a cylindrical shape and a bar-shaped gas generator 3 is arranged in the gas distributor 6. The gas generator 3 is arranged so that the longitudinal direction may be a vertical direction. The gas distributor 6 is made by forming heat resistant cloth into a cylindrical shape. An outflow port for the upper chamber is narrowed by seam 6a. A lower part of the gas distributor 6 is a check valve 6C to prevent outflow of gas from the lower chamber 1a to the upper chamber 1b. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、自動車等の乗員を側面衝突時等に保護するための側突用エアバッグ装置に係り、特に内部が複数の室に区画されたエアバッグを有する側突用エアバッグ装置に関する。
【0002】
【従来の技術】
側突用エアバッグ装置は、周知の通り、ガス発生器によってエアバッグを乗員の側部に膨張させ、この膨張したエアバッグによって乗員の身体を受け止めるようにしたものである。
【0003】
特開2000−177527号には、エアバッグのうち乗員腰部が当るエアバッグ下部を上部よりも高内圧に膨張させる構成が記載されている。
【0004】
図8は同号公報の側突用エアバッグ装置を備えた座席の側面図であり、図9は図5のIX部分の拡大断面図である。
【0005】
このエアバッグ18は、シーム24によって上室20と下室22とに区画されている。シーム24の後端は、エアバッグ18の後縁から若干離隔しており、このシーム24の後端とエアバッグ18の後縁との離間部分に筒状の管状ハウジング30が配置されている。この管状ハウジング30内に棒状のガス発生器36が配置されている。管状ハウジング30の上下両端はパイプクリップ32,34となっており、該パイプクリップ32,34によってガス発生器36が固定されている。このパイプクリップ32,34により、ガス発生器36と管状ハウジング30との間がシールされている。該パイプクリップ32,34はシートバック14の取付箇所26に取り付けられている。
【0006】
管状ハウジング30には、ガス発生器36からのガスを上室20に流出させる上室用流出口42と下室22に流出させる下室用流出口44とが設けられている。該下室用流出口44の開口面積は上室用流出口42の開口面積よりも大となっている。これにより、ガス発生器36が作動したときには、上室20内は約0.5barの内圧となり、下室22内は約1.5barの内圧となるようにエアバッグ18が膨張する。
【0007】
【特許文献1】
特開2000−177527号公報
【0008】
【発明が解決しようとする課題】
上記特開2000−177527号公報の側突用エアバッグ装置にあっては、管状ハウジング30を用いており、膨張したエアバッグ18の下室22が乗員を受け止めたときに該下室22内のガスが該管状ハウジング30内を通って上室20に流出してしまうので、下室内のガス圧を長時間にわたって高く保つことができない。
【0009】
本発明は、このような問題点を解決し、下室内のガス圧を十分に長く高い圧力に保つことができる側突用エアバッグ装置を提供することを目的とする。
【0010】
【課題を解決するための手段】
本発明の側突用エアバッグ装置は、膨張時に乗員を向く乗員面及びそれと反対側の車体面を有し、内部が少なくとも上室及び下室の2室を含む複数の室に区画されたエアバッグと、該エアバッグを膨張させるためのガス発生器と、該ガス発生器を包囲しており、該ガス発生器からのガスを少なくとも該上室及び下室に流出させる流出口を有したガス分配器とを備えたエアバッグ装置において、該ガス分配器の下室用流出口は上室用流出口よりも大であり、該下室から上室へのガスの流出を阻止する逆止弁が設けられていることを特徴とするものである。
【0011】
かかる本発明の側突用エアバッグ装置にあっては、下室用流出口の方が上室用流出口よりも大きいので、下室が上室よりも早期に膨張すると共に、下室の方が上室よりも高内圧となる。そして、この下室から上室へのガス流出が逆止弁によって阻止されるので、下室内の圧力が長い時間高く保持される。なお、この側突用エアバッグ装置は、側突時だけでなく、横転時等にも乗員を保護可能である。
【0012】
本発明では、ガス分配器は該ガス発生器を包むシートよりなり、該ガス分配器の下室用流出口はガス発生器よりも下室側へ延出しており、この延出した部分が前記逆止弁を構成するようにしてもよい。この構造は、ガス分配器によって逆止弁を構成したものであり、構成が簡易で製作コストも低い。
【0013】
この場合、シートが筒状に丸められ、シートの一側縁と他側縁とが重ね合わされ、この重ね合わされた側縁をガス発生器の取付用部材が貫通する構成としてもよい。このようにすれば、平たいシートを筒状に丸め、このシートの両側縁にガス発生器の取付部材(例えばボルト)を貫通させるだけでガス分配器を構成でき、ガス分配器の製作が極めて簡単である。
【0014】
本発明では、上室からガスをエアバッグ外に流出させるベント手段を設けることが望ましい。この上室からベント手段を介してガスが流出することにより、上室に当った乗員の衝撃が吸収される。
【0015】
【発明の実施の形態】
以下、図面を参照して実施の形態について説明する。図1は実施の形態に係る側突用エアバッグ装置を備えた自動車座席の斜視図、図2(a)は図1のII−II線に沿う断面図、図2(b)及び図3は同(a)のB−B線,III−III線に沿う断面図である。図4はガス分配器の斜視図、図5はガス発生器及びそのホルダの斜視図、図6は図5のVI−VI線に沿う断面図である。
【0016】
図1の通り、エアバッグ1は、座席10の窓側サイド部分に沿って膨張するよう構成されている。この座席10は、シートクッション11と、シートバック12と、ヘッドレスト13とを備えている。
【0017】
シートバック12の側部に側突用エアバッグ装置のケース(図示略)が設置され、このケース内にエアバッグ1が折り畳まれて収納され、モジュールカバー(図示略)により覆装されている。
【0018】
このエアバッグ1は、2枚の布、樹脂シート等のシート状材料(この実施の形態では布)を重ね合わせ、それらの周縁部同士を縫合することにより袋形状にしたものであり、その内部は、線状結合部(この実施の形態ではシーム(縫目))2によって下側の下室1aと上側の上室1bとに区画されている。このシーム2は、エアバッグ1の乗員面1pとそれの反対側の車体面1qとを結合している。このシーム2は、ループ状部2aを有した略6字状のものである。
【0019】
図2(a)に示す通り、このシーム2のループ状部2aの後端側はエアバッグ1の後縁から若干離隔して上方に延在しており、このループ状部2aとエアバッグ1の後縁との離間部分に上室1bと下室1aとを連通する連通部が形成されている。シーム2の前端はエアバッグ1の前縁に連なっている。
【0020】
この連通部にガス分配器6が配置され、その内部に棒状のガス発生器3が配置されている。ガス分配器6は、略方形の耐熱性の布を筒状に巻回し、その一側縁と他側縁とを重ね合わせ、この重ね合わせた部分にボルト挿通孔(又はスリット)を設けたものである。このボルト挿通孔に後述のボルト7cが挿通されることにより、布が筒状に保形される。この筒状のガス分配器6は、筒軸心方向が上下方向となるように配置されている。このガス分配器6の上部の上室側の流出口はシーム6aによって狭められている。下室側の流出口は上室側流出口よりも大きなものとなっている。
【0021】
このガス発生器3は、その長手方向が上下方向になるように配置されている。このガス発生器3は、その下端にガス噴出部3bを備えている。
【0022】
このガス発生器3はインフレータホルダ(以下、ホルダと略)7に保持されている。このホルダ7は、プレート状の主板部7aと、2本のC字形のバンド部7bとを有しており、このバンド部7bからボルト7cが突設されている。ガス発生器3は、この主板部7aとバンド部7bとに挟持されている。ボルト7cは主板部7aを貫通したバンド部7bと反対側に突出している。
【0023】
このボルト7cは、前述の通り、ガス分配器6を構成する布の両側縁の前記ボルト挿通孔と、エアバッグ1の後縁とを貫通して該エアバッグ1の後方に突出している。このボルト7cがナットによってサイド側突用エアバッグ装置のケースに留め付けられている。これにより、ガス発生器3、エアバッグ1が該ケースに連結されている。
【0024】
ガス発生器3の全体はこのガス分配器6内に配置されている。ガス分配器6の下部は、ガス発生器3の下端よりも下方に延出しており、このガス分配器6の下部が逆止弁6Cを形成している。
【0025】
ガス発生器3がガス噴出作動した場合、ガス分配器6は図3(b)のように略々筒形に膨らみ、該ガス分配器6を通ってガスが下室1a及び上室1bに供給され、エアバッグ1が膨張する。この場合、ガス分配器6の外周面は乗員面1p及び車体面1qに対し密着し、ガス分配器6の外面と乗員面1p及び車体面1qとの間をガスが通過することはない。なお、ガス分配器6の外面と乗員面1p及び車体面1qとを接着又は縫着によって結合してもよい。
【0026】
上室1bにはベントホール5が設けられている。
【0027】
このように構成された側突用エアバッグ装置において、自動車が側突を受けたり横転した場合には、ガス発生器3がガス噴出作動する。このガスは、ガス発生器3からそれぞれ下室1a及び上室1bに流入し、各室1a,1bを膨張させる。これにより、図1の通りエアバッグ1が座席10の窓側サイドに沿って展開する。なお、ガス分配器6の下室用流出口は上室用流出口よりも大きく、またガス発生器3のガス噴出口がガス分配器6内の下部に配置されているので、下室1aが上室1bよりも早期に且つ高内圧に膨張する。
【0028】
この側突用エアバッグ装置にあっては、上室1bにベントホール5が設けられているので、上室1bに乗員が当ると上室1b内のガスはベントホール5から流出し、ぶつかってきた乗員の衝撃が吸収される。下室1aに乗員の身体が当っても、下室1a内と上室1b内とは逆止弁6Cによって遮断される。即ち、下室1aからガス分配器6を介して上室1bにガスが流出しようとすると、布製のガス分配器6の下部(逆止弁6C)が口を閉じるように重なり合い、ガスの流出を阻止する。この結果、下室1a内のガス圧は高いまま保持され、乗員の腰部の横移動が長時間にわたり阻止される。
【0029】
上記の実施の形態では、エアバッグ1内は上室1b及び下室1aの2室に区画されているが、3室以上に区画されてもよい。図4は、エアバッグ内に横向き略U字形のシーム2Aを設け、これにより上室1b,下室1a間に1個の中室1cを設けたエアバッグ1Aを示す断面図である。
【0030】
該シーム2Aの前縁はエアバッグ1Aの前縁に接合されている。このシーム2Aには上室1bと中室1cとを連通する開放部8が設けられている。このエアバッグ1Aのその他の構成は前述の図1〜3のエアバッグ1と同一となっており、図4において図1〜3と同一符号は同一部分を示している。
【0031】
図4の実施の形態においても、ガス分配器6が設けられているので、下室1bのガス圧は長時間にわたり高く保たれる。
【0032】
上記実施の形態は、いずれも本発明の一例であり、本発明は図示以外の形態をもとりうる。例えば、本発明では、4室以上の室を形成してもよい。逆止弁の数や位置は上記実施の形態に限定されない。
【0033】
【発明の効果】
以上の通り、本発明によると、下室内のガス圧を十分に長く高い圧力に保つことができる側突用エアバッグ装置が提供される。
【図面の簡単な説明】
【図1】実施の形態に係るサイド側突用エアバッグ装置を備えた自動車座席の斜視図である。
【図2】(a)図は図1のII−II線に沿う断面図、(b)図は(a)図のB−B線に沿う断面図である。
【図3】図2のIII−III線に沿う断面図である。
【図4】実施の形態に係るエアバッグ装置に用いられているガス分配器の斜視図である。
【図5】実施の形態に係るエアバッグ装置のガス発生器及びホルダの斜視図である。
【図6】図5のVI−VI線に沿う断面図である。
【図7】従来例を示す側面図である。
【図8】別の実施の形態を示す図1と同様部分の断面図である。
【図9】従来例を示す断面図である。
【符号の説明】
1,1A エアバッグ
1a 下室
1b 上室
1c 中室
2,2A シーム
3 ガス発生器
5 ベントホール
6 ガス分配器
6a シーム
6C 逆止弁
7 ホルダ
7c ボルト
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a side collision airbag device for protecting an occupant of an automobile or the like in a side collision or the like, and more particularly to a side collision airbag device having an airbag partitioned into a plurality of chambers.
[0002]
[Prior art]
As is well known, a side collision airbag device is configured such that an airbag is inflated to the side of an occupant by a gas generator, and the occupant's body is received by the inflated airbag.
[0003]
Japanese Patent Application Laid-Open No. 2000-177527 describes a configuration in which a lower portion of an airbag, which is applied to an occupant's waist, is inflated to a higher internal pressure than an upper portion.
[0004]
FIG. 8 is a side view of a seat provided with the side collision airbag device of the same publication, and FIG. 9 is an enlarged sectional view of a portion IX in FIG.
[0005]
The airbag 18 is partitioned into an upper chamber 20 and a lower chamber 22 by a seam 24. The rear end of the seam 24 is slightly separated from the rear edge of the airbag 18, and a tubular tubular housing 30 is disposed at a position where the rear end of the seam 24 is separated from the rear edge of the airbag 18. A rod-shaped gas generator 36 is arranged in the tubular housing 30. The upper and lower ends of the tubular housing 30 are pipe clips 32 and 34, and the gas generator 36 is fixed by the pipe clips 32 and 34. The pipe clips 32 and 34 seal the space between the gas generator 36 and the tubular housing 30. The pipe clips 32 and 34 are attached to attachment points 26 of the seat back 14.
[0006]
The tubular housing 30 is provided with an upper chamber outlet 42 for allowing gas from the gas generator 36 to flow into the upper chamber 20 and a lower chamber outlet 44 for allowing gas to flow into the lower chamber 22. The opening area of the lower chamber outlet 44 is larger than the opening area of the upper chamber outlet 42. Thereby, when the gas generator 36 is operated, the airbag 18 is inflated so that the inside of the upper chamber 20 has an internal pressure of about 0.5 bar and the inside of the lower chamber 22 has an internal pressure of about 1.5 bar.
[0007]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2000-177527
[Problems to be solved by the invention]
In the side collision airbag device disclosed in Japanese Patent Application Laid-Open No. 2000-177527, the tubular housing 30 is used, and when the lower chamber 22 of the inflated airbag 18 receives an occupant, the lower chamber 22 is closed. Since gas flows out into the upper chamber 20 through the inside of the tubular housing 30, the gas pressure in the lower chamber cannot be kept high for a long time.
[0009]
An object of the present invention is to solve such a problem and to provide a side collision airbag device capable of maintaining the gas pressure in the lower chamber at a sufficiently high and high pressure.
[0010]
[Means for Solving the Problems]
The side collision airbag device of the present invention has an occupant surface facing an occupant when inflated and a vehicle body surface opposite to the occupant surface, and has an interior partitioned into a plurality of chambers including at least two chambers, an upper chamber and a lower chamber. A bag, a gas generator for inflating the airbag, and a gas surrounding the gas generator and having an outlet for discharging gas from the gas generator to at least the upper chamber and the lower chamber. An airbag device provided with a distributor, wherein the outlet for the lower chamber of the gas distributor is larger than the outlet for the upper chamber, and a check valve for preventing gas from flowing from the lower chamber to the upper chamber. Is provided.
[0011]
In such a side collision airbag device of the present invention, since the lower chamber outlet is larger than the upper chamber outlet, the lower chamber is inflated earlier than the upper chamber, and the lower chamber is inflated earlier. Has a higher internal pressure than the upper chamber. Then, since the outflow of gas from the lower chamber to the upper chamber is prevented by the check valve, the pressure in the lower chamber is kept high for a long time. The side collision airbag device can protect an occupant not only at the time of a side collision but also at the time of a rollover.
[0012]
In the present invention, the gas distributor comprises a sheet wrapping the gas generator, and the outlet for the lower chamber of the gas distributor extends to the lower chamber side than the gas generator. A check valve may be configured. In this structure, the check valve is constituted by the gas distributor, and the structure is simple and the production cost is low.
[0013]
In this case, the sheet may be rolled into a cylindrical shape, one side edge of the sheet and the other side edge may be overlapped, and the mounting member of the gas generator may pass through the overlapped side edge. In this way, a gas distributor can be formed by simply rolling a flat sheet into a cylindrical shape, and penetrating mounting members (for example, bolts) of the gas generator on both side edges of the sheet, making the production of the gas distributor extremely simple. It is.
[0014]
In the present invention, it is desirable to provide a vent means for allowing gas to flow out of the airbag from the upper chamber. When the gas flows out from the upper chamber via the vent means, the impact of the occupant hitting the upper chamber is absorbed.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 is a perspective view of an automobile seat provided with a side collision airbag device according to an embodiment, FIG. 2A is a cross-sectional view taken along line II-II of FIG. 1, and FIGS. It is sectional drawing which follows the BB line and the III-III line of the same (a). FIG. 4 is a perspective view of the gas distributor, FIG. 5 is a perspective view of the gas generator and its holder, and FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG.
[0016]
As shown in FIG. 1, the airbag 1 is configured to inflate along a window-side portion of the seat 10. The seat 10 includes a seat cushion 11, a seat back 12, and a headrest 13.
[0017]
A side collision airbag device case (not shown) is installed on a side portion of the seat back 12, and the airbag 1 is folded and stored in the case, and is covered with a module cover (not shown).
[0018]
The airbag 1 is formed in a bag shape by stacking two sheets of cloth material (a cloth in this embodiment) such as a cloth and a resin sheet, and stitching their peripheral edges together. Are divided into a lower lower chamber 1a and an upper upper chamber 1b by a linear connecting portion (seam (seam) in this embodiment) 2. The seam 2 connects the occupant surface 1p of the airbag 1 with the vehicle body surface 1q on the opposite side. The seam 2 has a substantially six-character shape having a loop-shaped portion 2a.
[0019]
As shown in FIG. 2 (a), the rear end side of the loop portion 2a of the seam 2 extends upward slightly away from the rear edge of the airbag 1, and the loop portion 2a and the airbag 1 A communication portion that connects the upper chamber 1b and the lower chamber 1a is formed at a portion separated from the rear edge. The front end of the seam 2 is connected to the front edge of the airbag 1.
[0020]
A gas distributor 6 is disposed in the communicating portion, and a rod-shaped gas generator 3 is disposed therein. The gas distributor 6 is obtained by winding a substantially rectangular heat-resistant cloth into a cylindrical shape, overlapping one side edge with the other side edge, and providing a bolt insertion hole (or slit) in the overlapped portion. It is. By inserting a bolt 7c, which will be described later, into the bolt insertion hole, the cloth is kept cylindrical. The cylindrical gas distributor 6 is arranged so that the axial direction of the cylinder is the vertical direction. The upper chamber-side outlet of the gas distributor 6 is narrowed by a seam 6a. The outlet on the lower chamber side is larger than the outlet on the upper chamber side.
[0021]
The gas generator 3 is arranged so that its longitudinal direction is the vertical direction. The gas generator 3 has a gas ejection part 3b at its lower end.
[0022]
The gas generator 3 is held by an inflator holder (hereinafter, abbreviated as a holder) 7. The holder 7 has a plate-shaped main plate portion 7a and two C-shaped band portions 7b, and bolts 7c protrude from the band portions 7b. The gas generator 3 is sandwiched between the main plate portion 7a and the band portion 7b. The bolt 7c protrudes on the opposite side to the band 7b penetrating the main plate 7a.
[0023]
As described above, the bolts 7c penetrate through the bolt insertion holes on both side edges of the cloth constituting the gas distributor 6 and the rear edge of the airbag 1 and protrude rearward from the airbag 1. The bolt 7c is fastened to the case of the side-side collision airbag device by a nut. Thereby, the gas generator 3 and the airbag 1 are connected to the case.
[0024]
The entire gas generator 3 is arranged in the gas distributor 6. The lower portion of the gas distributor 6 extends below the lower end of the gas generator 3, and the lower portion of the gas distributor 6 forms a check valve 6C.
[0025]
When the gas generator 3 performs the gas ejection operation, the gas distributor 6 expands in a substantially cylindrical shape as shown in FIG. 3B, and the gas is supplied to the lower chamber 1a and the upper chamber 1b through the gas distributor 6. Then, the airbag 1 is inflated. In this case, the outer peripheral surface of the gas distributor 6 is in close contact with the occupant surface 1p and the vehicle body surface 1q, and gas does not pass between the outer surface of the gas distributor 6 and the occupant surface 1p and the vehicle body surface 1q. The outer surface of the gas distributor 6 may be bonded to the occupant surface 1p and the vehicle body surface 1q by bonding or sewing.
[0026]
A vent hole 5 is provided in the upper chamber 1b.
[0027]
In the side collision airbag device configured as described above, when the vehicle receives a side collision or rolls over, the gas generator 3 performs a gas ejection operation. This gas flows from the gas generator 3 into the lower chamber 1a and the upper chamber 1b, respectively, and expands the respective chambers 1a and 1b. Thereby, the airbag 1 is deployed along the window side of the seat 10 as shown in FIG. The outlet for the lower chamber of the gas distributor 6 is larger than the outlet for the upper chamber, and the gas outlet of the gas generator 3 is arranged in the lower part of the gas distributor 6, so that the lower chamber 1a is It expands to a high internal pressure earlier than the upper chamber 1b.
[0028]
In this side collision airbag device, since the upper chamber 1b is provided with the vent hole 5, when an occupant hits the upper chamber 1b, the gas in the upper chamber 1b flows out of the vent hole 5 and hits. The shock of the occupant is absorbed. Even if the occupant's body hits the lower room 1a, the inside of the lower room 1a and the inside of the upper room 1b are shut off by the check valve 6C. That is, when gas flows from the lower chamber 1a to the upper chamber 1b via the gas distributor 6, the lower part (the check valve 6C) of the cloth gas distributor 6 overlaps so as to close the mouth, and the gas flows out. Block. As a result, the gas pressure in the lower chamber 1a is kept high, and lateral movement of the occupant's waist is prevented for a long time.
[0029]
In the above embodiment, the inside of the airbag 1 is divided into two chambers, the upper chamber 1b and the lower chamber 1a, but may be divided into three or more chambers. FIG. 4 is a cross-sectional view showing an airbag 1A in which a laterally substantially U-shaped seam 2A is provided in the airbag, thereby providing one middle chamber 1c between the upper chamber 1b and the lower chamber 1a.
[0030]
The front edge of the seam 2A is joined to the front edge of the airbag 1A. The seam 2A is provided with an opening 8 that connects the upper chamber 1b and the middle chamber 1c. Other configurations of the airbag 1A are the same as those of the airbag 1 of FIGS. 1 to 3 described above, and the same reference numerals in FIGS.
[0031]
Also in the embodiment of FIG. 4, since the gas distributor 6 is provided, the gas pressure in the lower chamber 1b is kept high for a long time.
[0032]
Each of the above embodiments is an example of the present invention, and the present invention may take forms other than those illustrated. For example, in the present invention, four or more chambers may be formed. The number and position of the check valves are not limited to the above embodiment.
[0033]
【The invention's effect】
As described above, according to the present invention, there is provided a side collision airbag device capable of maintaining the gas pressure in the lower chamber at a sufficiently high pressure.
[Brief description of the drawings]
FIG. 1 is a perspective view of an automobile seat provided with a side collision airbag device according to an embodiment.
2A is a cross-sectional view taken along line II-II in FIG. 1, and FIG. 2B is a cross-sectional view taken along line BB in FIG.
FIG. 3 is a sectional view taken along line III-III in FIG. 2;
FIG. 4 is a perspective view of a gas distributor used in the airbag device according to the embodiment.
FIG. 5 is a perspective view of a gas generator and a holder of the airbag device according to the embodiment.
FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5;
FIG. 7 is a side view showing a conventional example.
FIG. 8 is a cross-sectional view of a portion similar to FIG. 1 showing another embodiment.
FIG. 9 is a sectional view showing a conventional example.
[Explanation of symbols]
1, 1A Airbag 1a Lower chamber 1b Upper chamber 1c Middle chamber 2, 2A Seam 3 Gas generator 5 Vent hole 6 Gas distributor 6a Seam 6C Check valve 7 Holder 7c Bolt

Claims (4)

膨張時に乗員を向く乗員面及びそれと反対側の車体面を有し、内部が少なくとも上室及び下室の2室を含む複数の室に区画されたエアバッグと、
該エアバッグを膨張させるためのガス発生器と、
該ガス発生器を包囲しており、該ガス発生器からのガスを少なくとも該上室及び下室に流出させる流出口を有したガス分配器とを備えたエアバッグ装置において、
該ガス分配器の下室用流出口は上室用流出口よりも大であり、
該下室から上室へのガスの流出を阻止する逆止弁が設けられていることを特徴とする側突用エアバッグ装置。
An airbag having an occupant surface facing the occupant during inflation and a vehicle body surface on the opposite side thereof, and having an interior partitioned into a plurality of chambers including at least two upper and lower chambers,
A gas generator for inflating the airbag;
A gas distributor surrounding the gas generator and having a gas distributor having an outlet through which gas from the gas generator flows out to at least the upper chamber and the lower chamber,
The outlet for the lower chamber of the gas distributor is larger than the outlet for the upper chamber,
A side collision airbag device, further comprising a check valve for preventing gas from flowing from the lower chamber to the upper chamber.
請求項1において、該ガス分配器は該ガス発生器を包むシートよりなり、該ガス分配器の下室用流出口はガス発生器よりも下室側へ延出しており、この延出した部分が前記逆止弁を構成していることを特徴とする側突用エアバッグ装置。2. The gas distributor according to claim 1, wherein the gas distributor comprises a sheet surrounding the gas generator, and an outlet for a lower chamber of the gas distributor extends to a lower chamber side than the gas generator. Constitutes the check valve. 請求項2において、前記シートが筒状に丸められ、シートの一側縁と他側縁とが重ね合わされ、この重ね合わされた側縁をガス発生器の取付用部材が貫通していることを特徴とする側突用エアバッグ装置。The sheet according to claim 2, wherein the sheet is rolled into a tubular shape, one side edge of the sheet is overlapped with the other side edge, and a mounting member of the gas generator passes through the overlapped side edge. Side collision airbag device. 請求項1ないし4のいずれか1項において、該上室からガスをエアバッグ外に流出させるベント手段が設けられていることを特徴とする側突用エアバッグ装置。The airbag device for side collision according to any one of claims 1 to 4, further comprising a vent means for allowing gas to flow out of the airbag from the upper chamber.
JP2003060107A 2002-12-27 2003-03-06 Side airbag device Expired - Fee Related JP4103633B2 (en)

Priority Applications (4)

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JP2003060107A JP4103633B2 (en) 2003-03-06 2003-03-06 Side airbag device
US10/667,463 US7168733B2 (en) 2002-12-27 2003-09-23 Airbag apparatus
CNB031327028A CN1329228C (en) 2002-12-27 2003-09-29 Air sac device for lateral collision
EP03024429A EP1433667A3 (en) 2002-12-27 2003-10-23 Airbag apparatus for side collision

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