JP3921791B2 - Airbag case - Google Patents

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JP3921791B2
JP3921791B2 JP07199898A JP7199898A JP3921791B2 JP 3921791 B2 JP3921791 B2 JP 3921791B2 JP 07199898 A JP07199898 A JP 07199898A JP 7199898 A JP7199898 A JP 7199898A JP 3921791 B2 JP3921791 B2 JP 3921791B2
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lid
peripheral wall
base
end surface
wall portion
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JPH11268603A (en
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聡 馬渕
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Toyoda Gosei Co Ltd
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Toyoda Gosei Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、車両のシート等に配置されるエアバッグを収納するエアバッグ用ケースに関し、特に、膨張時のエアバッグに押されて開くリッドを備えたエアバッグ用ケースに関する。
【0002】
【従来の技術とその課題】
従来、シートにおける背もたれ部の側部に配置される側突用エアバッグ装置では、折り畳まれたエアバッグが、ケースに収納された状態で配置されるものがあった(特開平9−240411号公報等参照)。
【0003】
ケースは、断面略四角筒形状として、取付部位に連結固定される基部と、基部の一端とヒンジ部を介して連結され、膨張時のエアバッグに押されて開くリッドと、を備えて構成されていた。
【0004】
そして、基部の他端側の先端とリッドの先端とは、端面相互を当接させるとともに、エアバッグの膨張時以外に開かないように、相互に係合可能な係止脚や係止孔を部分的に備えていた。
【0005】
しかし、軽量化の観点から、エアバッグ用ケースを全て合成樹脂製とするような場合、基部の他端側の先端とリッドの先端とが、単に、端面相互を突き合わせ状態で、当接していると、リッドが基部側に押された際、リッド先端が、基部の端面から外れて基部の端面の内側縁や外側縁と干渉し、異音を生じさせる場合があった。特に、基部もリッドも合成樹脂から形成されていると、基部やリッドの先端が変形し易くなって、異音を生じさせる事態を招き易かった。
【0006】
なお、リッドが基部側に押される状態は、例えば、エアバッグ用ケースが、ハードトップ仕様の車両の前席に設けられた側突用エアバッグ装置に使用されて、後席の乗員が前席の背もたれ部の側部に手を触れて乗り降りするような場合、発生する虞れがある。
【0007】
本発明は、上述の課題を解決するものであり、リッドが基部側に押されても、異音の発生を抑えることができる合成樹脂製のエアバッグ用ケースを提供することを目的とする。
【0008】
【課題を解決するための手段】
本発明に係るエアバッグ用ケースは、折り畳まれたエアバッグの周囲を覆って収納可能な断面略四角筒形状の合成樹脂製として、
取付部位に連結固定される基部と、
該基部の一端とヒンジ部を介して連結されて、前記基部と対向するように延び、膨張時の前記エアバッグに押されて開くリッドと、
を備えて構成され、
前記基部の他端側の先端と前記リッドの先端とが、端面相互を突き合わせ状態で当接させるとともに、前記エアバッグの膨張時以外に開かないように相互に係合される係止脚と係止孔とを部分的に備えて、構成されるエアバッグ用ケースであって、
前記基部が、略長方形板状として周縁の1辺に前記ヒンジ部を連結させた背板部と、該背板部の周縁における前記ヒンジ部を除いた3辺の周縁から前記背板部に略直交するように延びる周壁部と、を備えて構成され、
前記リッドが、前記背板部と対向するように配置される略長方形板状の蓋本体部と、該蓋本体部の周縁から四角筒状に延びて先端の一部を前記ヒンジ部と連結させる周壁部と、を備えて構成され、
前記基部の周壁部と前記リッドの周壁部とが、前記ヒンジ部側と前記係止脚・前記係止孔との配置部位を除いた先端に、前記基部と前記リッドとの係合時に相互に突き合わせ状態で当接させる端面を配置させ、
前記基部の周壁部の先端における前記リッドの周壁部の端面と当接する前記基部の周壁部の端面の外側部位に、前記基部の周壁部と略平行に延びて、前記基部の周壁部と前記リッドの周壁部との端面相互の当接時に、前記リッドの周壁部の先端の外側部位を覆い可能として、前記リッドの前記基部側への押圧時における前記リッドの周壁部の先端が前記基部の周壁部の端面から前記ケースの外側方向へ逃げる移動を規制する規制リブが、前記基部の周壁部の全周にわたって、設けられ
前記係止孔が、複数設けられて、それぞれ、前記リッドの周壁部の端面に当接する前記基部の周壁部の端面から前記背板部側に凹む凹部を設けるとともに、前記規制リブの根元部位で、前記基部の周壁部を開口させて、形成され、
前記係止脚が、前記リッドの周壁部の先端において、それぞれ、周囲の前記リッドの周壁部の端面との間に、前記係止脚を前記ケースの外側方向と内側方向とへ撓み可能に、前記リッドの周壁部の端面から前記蓋本体部側に凹むように切り欠かれた凹部、を設けるとともに、前記ケースの外側方向に突出して、前記係止孔の周縁における前記規制リブ側の縁に係止される鉤部、を設けて形成され、
前記基部の周壁部における前記ヒンジ部から最も離れた縁側において、
前記リッドの周壁部の端面と当接する前記基部の周壁部の端面の内側部位に、前記リッドの周壁部の端面の厚さ寸法より開口幅寸法を小さくして前記背板部側に凹む凹部を設けて、前記背板部からの先端の高さを前記基部の周壁部の端面と略同じ高さとして、前記基部の周壁部と略平行に延びるように突設され、前記リッドの前記基部側への押圧時における前記リッドの周壁部の先端が前記基部の周壁部の端面から前記ケースの内側方向へ逃げる移動を、前記リッドの周壁部の先端の一部を前記背板部側に凹む前記凹部に入り込ませた状態として前記リッドの周壁部の端面を当接させることにより、規制する支持リブが、配設されるとともに、
前記係止脚を係止する前記係止孔が、配設されて、該係止孔の周囲における前記ケースの内側部位に、前記係止脚の前記係止孔周縁への係止時に、前記鉤部を案内可能とし、かつ、前記リッドの前記基部側への押圧時における前記係止脚鉤部の前記ケースの内側方向へ逃げる移動を規制可能とする案内リブが、前記基部の周壁部と略平行に延びるように突設されて、配設されていることを特徴とする。
【0009】
【発明の効果】
本発明に係るエアバッグ用ケースでは、リッドが基部側に押されてリッド先端が、基部側端面からケースの外側方向へ逃げようとしても、規制リブによって、その移動が規制されることとなる。また、リッドが基部側に押されて、リッド先端が基部側端面からケースの内側方向へ逃げようとしても、基部側端面の内側部位に設けられた凹部が、リッド先端の厚さ寸法より開口幅寸法を小さくしていることから、リッド先端の一部を凹部に入り込ませた状態で、リッド先端が支持リブに当接して、リッドの移動が規制されることとなる。
【0010】
したがって、本発明に係るエアバッグ用ケースでは、リッドが基部側に押されても、基部の端面から外れて基部の端面の内側縁や外側縁と干渉するようなリッド先端の移動が規制されることから、異音の発生を抑えることができる。
【0011】
また、リッドの基部側への移動が規制されることから、エアバッグ装置におけるリッド側の意匠面の形状を維持でき、エアバッグ装置の外観意匠を向上させることができる。
【0012】
さらに、リッドや基部を合成樹脂で形成できることから、軽量化を図ることもできる。
【0013】
【発明の実施の形態】
以下、本発明の一実施形態を図面に基づいて説明する。
【0014】
実施形態のエアバッグ用ケース15は、図1・2に示すように、車両用シート1の背もたれ部2の側部に配置される側突用エアバッグ装置Mに使用されている。
【0015】
背もたれ部2には、略上下方向に配置されるシートフレーム3が配設され、側突用エアバッグ装置Mは、取付ブラケット13のボルト13bをナット9止めさせて、フレーム3に固定されている。なお、4はクッション、5・6・7は装飾布等からなる表皮であり、表皮5〜7は、縫合糸8を利用して、相互に縫合されている。また、シートフレーム3は、ケース15の後述する基部16の取付部位となる。
【0016】
側突用エアバッグ装置Mは、ケース15の他、折り畳まれた袋状のエアバッグ11と、エアバッグ11に膨張用ガスを供給するインフレーター12と、2つの取付ブラケット13と、を備えて構成されている。
【0017】
エアバッグ11は、内部にインフレーター12を挿入させた袋状として、可撓性を有した布材から形成されている。エアバッグ11は、膨張時の形状を、図1の二点鎖線で示すように、車両の前方側に突出して上方へ延びたような形状としている。
【0018】
インフレーター12は、エアバッグ11の内部に配置される丸棒状のシリンダタイプとしており、所定位置に、膨張用ガスを吐出する図示しないガス吐出口が開口されている。
【0019】
各取付ブラケット13は、インフレーター12の外周面に固定されてインフレーター12を保持する筒部13aと、筒部13aから延びるボルト13bと、を備えて構成されている。
【0020】
ケース15は、オレフィン系若しくはスチレン系等の熱可塑性エラストマー等の合成樹脂から形成され(実施形態は、オレイフィン系熱可塑性エラストマーである)、図2に示すように、折り畳まれたエアバッグ11の周囲を覆って収納可能な断面略四角筒形状として、基部16、リッド26、及び、ヒンジ部33、を備えて構成されている。
【0021】
基部16は、図5〜7に示すように、インフレーター12を収納する収納凹部17aを備えた略長方形板状の背板部17と、背板部17の周縁におけるヒンジ部33を除いた3辺の周縁から、背板部17と略直交するように、ケース15の内側方向へ延びる周壁部18と、を備えて構成されている。背板部17の収納凹部17aには、各取付ブラケット13のボルト13bを挿通させる2つの取付孔17bが形成されている。
【0022】
ヒンジ部33は、薄肉のインテグラルヒンジとして形成され、ケース15の車両への装着時の状態で、基部16の背板部17の周縁における車両の後方側部位でフレーム3に沿う略上下方向に配置されることとなる。
【0023】
周壁部18には、図3〜7に示すように、背板部17から離れた先端19に、ケース15の車両への装着時の状態で、リッド26の先端端面30と当接する端面20が形成されている。また、先端19には、リッド26の先端端面30と当接する端面20の外側部位に、周壁部18と略平行に延びて、端面20への当接時のリッド先端29の外側部位を覆い可能な規制リブ21が、周壁部18の全周に設けられている。さらに、先端19には、端面20の内側部位に、リッド先端29の端面30の厚さ寸法tより開口幅寸法wを小さくして背板部17側に凹む凹部22を設けて(図3参照)、背板部17からの先端の高さを端面20と略同じ高さとする支持リブ23が、基部16の周壁部18と略平行に延びるように突設されている。実施形態の場合、支持リブ23は、ヒンジ部33から最も離れた周壁部18の縁に、2箇所、設けられている。
【0024】
さらにまた、周壁部18の先端19には、端面20の所定位置に、端面20から背板部17側に凹む複数の凹部20aが設けられ、規制リブ21の根元部位で周壁部18を長方形に開口させるように、係止孔24が形成されている。各係止孔24の周縁における規制リブ21側の縁には、リッド26を閉じるために使用される係止脚31の鉤部31aが係止されることとなる。また、周壁部18の先端19の各係止孔24の周囲におけるケース15の内側部位には、係止脚31の係止孔24周縁への係止時に、鉤部31aを案内するための案内リブ25が、基部16の周壁部18と略平行に延びるように突設されて、配設されている。
【0025】
なお、各係止脚31の鉤部31aにおける係止孔24の周縁への係止力は、エアバッグ11の膨張時以外には、容易に解除されないように設定されている。
【0026】
また、図5に示す符号18aは、インフレーター12から延びる図示しないリード線を通す凹部である。
【0027】
リッド26は、閉じた状態で、基部16の背板部17と対向するように配置される略長方形板状の蓋本体部27と、蓋本体部27の周縁から蓋本体部27と直交するように四角筒形状に延びて、先端の一部をヒンジ部33と連結させる周壁部28と、を備えて構成されている。なお、図5〜7に示す符号27aは、蓋本体部27からヒンジ部33側に形成されるリッド26の補強用のリブである。
【0028】
周壁部28におけるヒンジ部33側を除いた先端29には、ヒンジ部33で折り曲げてリッド26を閉じた際、基部16の周壁部端面20に突き合わせ状態で当接する端面30が配置されるとともに、基部16の各係止孔24の周縁に係止可能なケース15の外側方向に突出する鉤部31aを備えた係止脚31が形成されている。各係止脚31の周囲には、係止脚31がケース15の外側方向と内側方向とへ容易に撓むように、周囲の周壁部端面30との間に、端面30から蓋本体部27側に凹むように切り欠かれた凹部30aが設けられている。
【0029】
そして、ケース15は、図5に示すように、リッド26が開いた状態で射出成形により形成されて、所定のエアバッグ11・インフレーター12・取付ブラケット13を収納した状態で、各係止脚31の鉤部31aを係止孔24の周縁に係止させてリッド26を閉じることによって、エアバッグ装置Mを組み立てるように使用される。
【0030】
エアバッグ装置Mの組み立てについて、詳しく述べると、まず、完全に袋状に縫合する前のエアバッグ11の内部に、取付ブラケット13・13を取り付けたインフレーター12を、挿入して、ボルト13b・13bやインフレーター12から延びるリード線をエアバッグ11の布材に設けられた所定の孔から突出させ、エアバッグ11の未縫合部位を縫合する。ついで、エアバッグ11を折り畳んだ後、ボルト13b・13bを取付孔17b・17bから突出させるように、リッド26を開かせた状態の基部16側に、インフレーター12とともに折り畳んだエアバッグ11を収納する。インフレーター12から延びる図示しないリード線は、凹部18aから突出させておく。
【0031】
そして、各係止脚31の鉤部31aを係止孔24の周縁に係止させて、リッド26を閉じれば、エアバッグ装置Mを組み立てることができる。
【0032】
さらに、ボルト13b・13bをシートフレーム3にナット9止めすれば、シート1の背もたれ部2にエアバッグ装置Mを取り付けることができる。なお、シート1は、エアバッグ装置Mを取り付けた後、表皮5〜7を取り付けて組み立てが完了され、車両に装着されることとなる。また、シート1を車両に装着する際には、インフレーター12から延びるリード線を、車両の所定のエアバッグ作動回路に結線させることとなる。
【0033】
エアバッグ装置Mが車両に装着された後、所定の信号がインフレーター12に入力されれば、インフレーター12の所定のガス吐出口から膨張用ガスが吐出され、エアバッグ11が、膨張してリッド26を押し、各係止脚鉤部31aの係止孔24周縁への係止を解除させて、リッド26を開かせるとともに、表皮5・6との縫合部位を破断させて、図1・2の2点鎖線で示すように、大きく膨張することとなる。
【0034】
そして、実施形態のケース15では、エアバッグ11の膨張する前の通常状態において、図2・3に示すように、表皮6を介して、リッド26が基部16側のF方向に押されて、リッド先端29が、基部側端面20からケース15の外側方向へ逃げようとしても、規制リブ21によって、その移動が規制される。また、リッド26が基部16側のF方向に押されて、リッド先端29が基部側端面20からケース15の内側方向へ逃げようとしても、基部側端面20の内側部位に設けられた凹部22が、リッド先端29の端面30の厚さ寸法tより開口幅寸法wを小さくしていることから、図3の2点鎖線で示すように、リッド先端29の一部を凹部22に入り込ませた状態で、リッド先端29の端面30が支持リブ23に当接して、リッド26の移動が規制されることとなる。
【0035】
したがって、実施形態のエアバッグ用ケース15では、リッド26が基部16側に押されても、基部16の端面20から外れて基部16の端面20の内側縁や外側縁と干渉するようなリッド先端29の移動が規制されることから、異音の発生を抑えることができる。
【0036】
また、実施形態では、リッド26の基部16側への移動が規制されることから、エアバッグ装置Mにおけるリッド26側の意匠面の形状、実施形態では、背もたれ部2の側面の形状を維持でき、エアバッグ装置Mの外観意匠を向上させることができる。
【0037】
勿論、実施形態のケース15では、リッド26や基部16を、ヒンジ部33を含めて、合成樹脂で形成できることから、軽量化を図ることもできる。
【0038】
さらに、実施形態のケース15では、支持リブ23の設けられている周壁部18のヒンジ部33から最も離れた縁側において、基部16側の係止孔24の周囲におけるケース15の内側部位に、リッド26の係止脚鉤部31aを案内するための案内リブ25が設けられており、これらの部位でも、リッド26が基部16側へ押圧されて係止脚31がケース15の内側方向へ逃げる移動時、係止脚鉤部31aが案内リブ25に規制されて、基部16の端面20から外れて基部16の端面20の内側縁と干渉するようなリッド先端29の移動が規制されることとなる。
【0039】
特に、実施形態では、このような案内リブ25が、支持リブ23の設けられていない周壁部18の縁(図5の紙面上での上下の縁)にも配置されており、一層、リッド先端29の不要な移動を規制することができる。勿論、図5の紙面上での上下の縁にも、凹部22を介在させて、支持リブ23を設けても良い。
【0040】
なお、実施形態では、シート背もたれ部2に配置される側突用エアバッグ装置Mに使用されるケース15について説明したが、折り畳まれるエアバッグを収納するものであれば、側突用エアバッグ装置Mに使用されるものに拘らず、インストルメントパネルに配置される助手席用エアバッグ装置、ルーフサイドレール等に配置される頭部保護エアバッグ装置等のエアバッグを収納するケースに、本発明を実施することができる。
【図面の簡単な説明】
【図1】本発明の実施形態のケースが使用されたエアバッグ装置の使用態様を示すシートの側面図である。
【図2】図1のII−II部位の概略断面図である。
【図3】同実施形態のリッドを閉じた状態のケースの要部を示す拡大図である。
【図4】同実施形態のリッドを閉じた状態のケースの他の部位の拡大図である。
【図5】同実施形態のリッドを開いた状態のケースの展開図である。
【図6】図5のVI−VI部位の概略断面図である。
【図7】図5の VII− VII部位の概略断面図である。
【符号の説明】
3…(取付部位)シートフレーム、
11…エアバッグ、
15…エアバッグ用ケース、
16…基部、
19…(基部・周壁部)先端、
20…端面、
21…規制リブ、
22…凹部、
23…支持リブ、
26…リッド、
29…(基部・周壁部)先端、
30…端面、
33…ヒンジ部、
t…厚さ寸法、
w…開口幅寸法、
M…エアバッグ装置。
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an airbag case for storing an airbag placed on a vehicle seat or the like, and more particularly, to an airbag case having a lid that is pushed and opened by an airbag when inflated.
[0002]
[Prior art and its problems]
2. Description of the Related Art Conventionally, in a side-impact airbag device disposed on a side portion of a backrest portion of a seat, a folded airbag is disposed in a state of being accommodated in a case (Japanese Patent Laid-Open No. 9-240411). Etc.).
[0003]
The case has a substantially square cylindrical shape in cross section, and includes a base portion that is connected and fixed to the attachment portion, a lid that is connected to one end of the base portion via a hinge portion, and is pushed by an airbag when inflated to open. It was.
[0004]
In addition, the tip of the other end of the base and the tip of the lid abut the end surfaces of each other, and have locking legs and locking holes that can be engaged with each other so that they do not open except when the airbag is inflated. Partially prepared.
[0005]
However, from the viewpoint of weight reduction, when all the airbag case is made of a synthetic resin, the tip on the other end side of the base and the tip of the lid are in contact with each other in a state where the end surfaces are just in contact with each other. When the lid is pushed to the base side, the tip of the lid may come off from the end surface of the base portion and interfere with the inner edge or the outer edge of the end surface of the base portion, which may cause abnormal noise. In particular, when both the base and the lid are made of a synthetic resin, the base and the tip of the lid are easily deformed, and it is easy to cause a noise.
[0006]
The lid is pushed to the base side when, for example, the airbag case is used in a side-impact airbag device provided in the front seat of a hardtop vehicle, and the rear passenger is in the front seat. This may occur when getting on and off the vehicle by touching the side of the backrest.
[0007]
The present invention solves the above-described problems, and an object of the present invention is to provide a synthetic resin airbag case that can suppress the generation of abnormal noise even when the lid is pushed to the base side.
[0008]
[Means for Solving the Problems]
The airbag case according to the present invention is made of a synthetic resin having a substantially square cylindrical cross section that can be stored covering the periphery of a folded airbag.
A base connected and fixed to the attachment site;
A lid connected to one end of the base portion via a hinge portion, extending so as to face the base portion, and being opened by being pushed by the airbag during inflation;
Configured with
The front end of the other end side of the base and the front end of the lid are brought into contact with each other in an abutting state and engaged with a locking leg engaged with each other so as not to open except when the airbag is inflated. A case for an air bag configured partially with a stop hole,
The base has a substantially rectangular plate shape, and a back plate part in which the hinge part is connected to one side of the periphery, and a peripheral part of the three sides excluding the hinge part at the periphery of the back plate part. And a peripheral wall portion extending so as to be orthogonal,
The lid has a substantially rectangular plate-like lid body portion disposed so as to face the back plate portion, and extends from the periphery of the lid body portion into a rectangular tube shape so that a part of the tip is connected to the hinge portion. A peripheral wall portion,
When the base and the lid are engaged , the peripheral wall of the base and the peripheral wall of the lid are disposed at the distal end excluding the arrangement portion of the hinge part and the locking leg / locking hole. Place the end face to be abutted in the butted state,
Outside portion of the end surface of the peripheral wall portion of the end surface and said base portion for abutment of the circumferential wall portion of the lid definitive the tip of the peripheral wall of the base portion, extends substantially parallel to the peripheral wall of the base portion, the peripheral wall portion of the base when the end face mutual contact between the peripheral wall portion of the lid, as can not covering the outer portion of the front end of the peripheral wall portion of the lid, tip the base of the peripheral wall of the lid at the time of pressing to the base side of the lid A regulation rib that regulates the movement of escaping from the end face of the peripheral wall portion toward the outer side of the case is provided over the entire circumference of the peripheral wall portion of the base portion ,
A plurality of the locking holes are provided, respectively, and a recess that is recessed from the end surface of the peripheral wall portion of the base portion that contacts the end surface of the peripheral wall portion of the lid to the back plate portion side is provided, and at the base portion of the regulation rib , Formed by opening the peripheral wall portion of the base,
The locking leg can be bent in the outer side direction and the inner side direction of the case between the end surface of the peripheral wall part of the surrounding lid at the tip of the peripheral wall part of the lid, A recess cut out from the end surface of the peripheral wall portion of the lid so as to be recessed toward the lid main body portion, and protrudes toward the outer side of the case, at the edge on the regulation rib side at the periphery of the locking hole Formed with a hook part to be locked,
On the edge side farthest from the hinge part in the peripheral wall part of the base part,
On the inner side portion of the end surface of the peripheral wall portion of the base, which is in contact with the end surface of the peripheral wall portion of the lid, there is a recess that is recessed toward the back plate portion by making the opening width dimension smaller than the thickness dimension of the end surface of the peripheral wall portion of the lid. The base of the lid is provided so as to protrude substantially parallel to the peripheral wall of the base, with the height of the tip from the back plate being substantially the same as the end surface of the peripheral wall of the base The movement of the distal end of the peripheral wall portion of the lid escaping from the end surface of the peripheral wall portion of the base portion toward the inner side of the case at the time of pressing toward the side is recessed in the back plate portion side. by abutting the end surface of the peripheral wall of the lid in a state where intruded into the recess, the support ribs which regulations are disposed Rutotomoni,
The locking hole for locking the locking leg is disposed, and when the locking leg is locked to the periphery of the locking hole at the inner portion of the case around the locking hole, A guide rib that can guide the flange portion and that can restrict movement of the locking leg flange portion to the inside of the case when the lid is pressed toward the base side, and a peripheral wall portion of the base portion. It is characterized by being provided so as to extend substantially in parallel .
[0009]
【The invention's effect】
In the airbag case according to the present invention, even if the lid is pushed to the base side and the lid tip tends to escape from the base side end surface toward the outer side of the case, the movement is restricted by the restriction rib. Also, even if the lid is pushed to the base side and the tip of the lid tries to escape from the base side end surface toward the inside of the case, the concave portion provided in the inner part of the base side end surface is wider than the thickness of the lid tip. Since the dimensions are small, the lid tip abuts against the support rib in a state where a part of the lid tip is inserted into the recess, and the movement of the lid is restricted.
[0010]
Therefore, in the airbag case according to the present invention, even if the lid is pushed to the base side, the movement of the lid tip that is separated from the end surface of the base portion and interferes with the inner edge or the outer edge of the base end surface is restricted. Therefore, it is possible to suppress the occurrence of abnormal noise.
[0011]
In addition, since the movement of the lid toward the base portion side is restricted, the shape of the design surface on the lid side of the airbag device can be maintained, and the appearance design of the airbag device can be improved.
[0012]
Furthermore, since the lid and the base can be formed of a synthetic resin, the weight can be reduced.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0014]
As shown in FIGS. 1 and 2, the airbag case 15 of the embodiment is used in a side-impact airbag device M that is disposed on the side portion of the backrest portion 2 of the vehicle seat 1.
[0015]
A seat frame 3 disposed substantially in the vertical direction is disposed on the backrest 2, and the side airbag device M is fixed to the frame 3 by fixing the bolt 13 b of the mounting bracket 13 with the nut 9. . In addition, 4 is a cushion, and 5 and 6 and 7 are skins which consist of a decoration cloth etc., and the skins 5-7 are mutually stitched | sutured using the suture thread 8. FIG. Further, the seat frame 3 serves as an attachment site for a base 16 to be described later of the case 15.
[0016]
The side impact airbag apparatus M includes a case 15, a folded bag-like airbag 11, an inflator 12 that supplies inflation gas to the airbag 11, and two mounting brackets 13. Has been.
[0017]
The airbag 11 is formed of a flexible cloth material in the form of a bag having an inflator 12 inserted therein. The airbag 11 has a shape when it is inflated, as shown by a two-dot chain line in FIG. 1, protruding toward the front side of the vehicle and extending upward.
[0018]
The inflator 12 is a round-bar cylinder type disposed inside the airbag 11, and a gas discharge port (not shown) for discharging the inflation gas is opened at a predetermined position.
[0019]
Each mounting bracket 13 includes a cylindrical portion 13a that is fixed to the outer peripheral surface of the inflator 12 and holds the inflator 12, and a bolt 13b that extends from the cylindrical portion 13a.
[0020]
The case 15 is formed of a synthetic resin such as an olefin-based or styrene-based thermoplastic elastomer (the embodiment is an oleifine-based thermoplastic elastomer), and as shown in FIG. The base portion 16, the lid 26, and the hinge portion 33 are configured as a substantially square cylindrical shape that can be stored and covered.
[0021]
As shown in FIGS. 5 to 7, the base portion 16 has three sides excluding the substantially rectangular plate-like back plate portion 17 having a storage recess 17 a for storing the inflator 12 and the hinge portion 33 at the periphery of the back plate portion 17. The peripheral wall portion 18 extends in the inner direction of the case 15 so as to be substantially orthogonal to the back plate portion 17 from the periphery thereof. Two mounting holes 17b through which the bolts 13b of the mounting brackets 13 are inserted are formed in the storage recess 17a of the back plate portion 17.
[0022]
The hinge portion 33 is formed as a thin integral hinge, and is substantially vertically extending along the frame 3 at the rear side portion of the vehicle at the periphery of the back plate portion 17 of the base portion 16 when the case 15 is mounted on the vehicle. Will be placed.
[0023]
As shown in FIGS. 3 to 7, the peripheral wall 18 has an end surface 20 that contacts the front end surface 30 of the lid 26 at the front end 19 away from the back plate 17 when the case 15 is mounted on the vehicle. Is formed. Further, the distal end 19 extends substantially parallel to the peripheral wall 18 to the outer portion of the end surface 20 that contacts the distal end surface 30 of the lid 26, and can cover the outer portion of the lid distal end 29 when contacting the end surface 20. A restricting rib 21 is provided on the entire circumference of the peripheral wall 18. Further, the tip 19 is provided with a recess 22 that is recessed toward the back plate 17 by making the opening width dimension w smaller than the thickness dimension t of the end face 30 of the lid tip 29 at the inner portion of the end face 20 (see FIG. 3). ), And a support rib 23 having a tip end height from the back plate portion 17 that is substantially the same as the end surface 20 is provided so as to extend substantially parallel to the peripheral wall portion 18 of the base portion 16 . In the embodiment, the support ribs 23, on the edge side of the peripheral wall 18 farthest from the hinge portion 33, two locations are provided.
[0024]
Furthermore, the front end 19 of the peripheral wall portion 18 is provided with a plurality of concave portions 20a that are recessed from the end surface 20 toward the back plate portion 17 at a predetermined position of the end surface 20 , and the peripheral wall portion 18 is formed in a rectangular shape at the root portion of the regulating rib 21. A locking hole 24 is formed so as to open. The flange 31a of the locking leg 31 used for closing the lid 26 is locked to the edge on the regulation rib 21 side at the periphery of each locking hole 24. In addition, a guide for guiding the flange 31a to the inner portion of the case 15 around each locking hole 24 at the tip 19 of the peripheral wall 18 when the locking leg 31 is locked to the periphery of the locking hole 24. The ribs 25 are provided so as to protrude so as to extend substantially parallel to the peripheral wall portion 18 of the base portion 16 .
[0025]
It should be noted that the locking force of the locking leg 31 on the periphery of the locking hole 24 at the flange 31a is set so as not to be easily released except when the airbag 11 is inflated.
[0026]
Reference numeral 18 a shown in FIG. 5 is a recess through which a lead wire (not shown) extending from the inflator 12 is passed.
[0027]
The lid 26 is in a closed state so as to be opposed to the back plate portion 17 of the base portion 16 and a substantially rectangular plate-like lid main body portion 27, and to be orthogonal to the lid main body portion 27 from the periphery of the lid main body portion 27. And a peripheral wall portion 28 that extends in a rectangular tube shape and connects a part of the tip to the hinge portion 33. 5-7 is a rib for reinforcement of the lid 26 formed on the hinge part 33 side from the lid main body part 27.
[0028]
The distal end 29 of the peripheral wall portion 28 excluding the hinge portion 33 side is provided with an end surface 30 that abuts against the peripheral wall end surface 20 of the base portion 16 in a butted state when the lid 26 is closed by folding the hinge portion 33. Locking legs 31 each having a flange 31a projecting outward of the case 15 that can be locked are formed on the periphery of each locking hole 24 of the base 16. Around each locking leg 31, between the end surface 30 and the lid main body 27 side, between the surrounding peripheral wall end surface 30 so that the locking leg 31 can be easily bent in the outer direction and the inner direction of the case 15. A recess 30a that is notched so as to be recessed is provided.
[0029]
As shown in FIG. 5, the case 15 is formed by injection molding with the lid 26 open, and each locking leg 31 is in a state in which the predetermined airbag 11, inflator 12, and mounting bracket 13 are stored. The airbag device M is used by assembling the airbag device M by closing the lid 26 by locking the collar portion 31 a of the hook 31 to the periphery of the locking hole 24.
[0030]
The assembly of the airbag apparatus M will be described in detail. First, the inflator 12 with the mounting brackets 13 and 13 attached is inserted into the airbag 11 before being completely sewn into a bag shape, and bolts 13b and 13b are inserted. In addition, a lead wire extending from the inflator 12 is projected from a predetermined hole provided in the cloth material of the airbag 11, and an unsewn portion of the airbag 11 is stitched. Next, after the airbag 11 is folded, the airbag 11 folded together with the inflator 12 is stored on the base 16 side with the lid 26 opened so that the bolts 13b and 13b protrude from the mounting holes 17b and 17b. . A lead wire (not shown) extending from the inflator 12 is protruded from the recess 18a.
[0031]
And the airbag apparatus M can be assembled if the collar part 31a of each latching leg 31 is latched to the periphery of the latching hole 24, and the lid 26 is closed.
[0032]
Further, if the bolts 13 b and 13 b are fastened to the seat frame 3 with the nut 9, the airbag device M can be attached to the backrest portion 2 of the seat 1. Note that the seat 1 is attached to the vehicle after the airbag apparatus M is attached and then the outer skins 5 to 7 are attached to complete the assembly. Further, when the seat 1 is mounted on the vehicle, the lead wire extending from the inflator 12 is connected to a predetermined airbag operation circuit of the vehicle.
[0033]
If the predetermined signal is input to the inflator 12 after the airbag device M is mounted on the vehicle, the inflation gas is discharged from the predetermined gas discharge port of the inflator 12, and the airbag 11 is inflated to form the lid 26. To release the locking of each locking leg collar 31a to the periphery of the locking hole 24, open the lid 26, and break the stitched portion with the epidermis 5 and 6, as shown in FIGS. As indicated by the two-dot chain line, the expansion will occur.
[0034]
In the case 15 of the embodiment, in the normal state before the airbag 11 is inflated, the lid 26 is pushed in the F direction on the base 16 side through the skin 6 as shown in FIGS. Even if the lid tip 29 is about to escape from the base-side end surface 20 toward the outer side of the case 15, its movement is restricted by the restriction rib 21. In addition, even if the lid 26 is pushed in the F direction on the base 16 side and the lid tip 29 tries to escape from the base side end surface 20 toward the inside of the case 15, the recess 22 provided in the inner part of the base side end surface 20 is provided. Since the opening width dimension w is smaller than the thickness dimension t of the end face 30 of the lid tip 29, a part of the lid tip 29 is inserted into the recess 22 as shown by a two-dot chain line in FIG. Thus, the end surface 30 of the lid tip 29 comes into contact with the support rib 23, and the movement of the lid 26 is restricted.
[0035]
Therefore, in the airbag case 15 of the embodiment, even if the lid 26 is pushed to the base 16 side, the lid tip is detached from the end surface 20 of the base 16 and interferes with the inner edge and the outer edge of the end surface 20 of the base 16. Since the movement of 29 is restricted, the generation of abnormal noise can be suppressed.
[0036]
Further, in the embodiment, since the movement of the lid 26 toward the base portion 16 side is restricted, the shape of the design surface on the lid 26 side in the airbag device M, and in the embodiment, the shape of the side surface of the backrest portion 2 can be maintained. The appearance design of the airbag device M can be improved.
[0037]
Of course, in the case 15 of the embodiment, the lid 26 and the base portion 16 including the hinge portion 33 can be formed of a synthetic resin, so that the weight can be reduced.
[0038]
Furthermore, in the case 15 of the embodiment, the lid is provided on the inner side of the case 15 around the locking hole 24 on the base 16 side on the edge side farthest from the hinge portion 33 of the peripheral wall portion 18 where the support rib 23 is provided. Guide ribs 25 for guiding the locking leg collar portions 31 a of the 26 are provided, and even in these portions, the lid 26 is pressed toward the base 16 side and the locking legs 31 escape to the inside of the case 15. At this time, the locking leg collar portion 31a is restricted by the guide rib 25, and the movement of the lid tip 29 that is separated from the end surface 20 of the base portion 16 and interferes with the inner edge of the end surface 20 of the base portion 16 is restricted. .
[0039]
In particular, in the embodiment, such guide ribs 25 are also arranged on the edges of the peripheral wall portion 18 where the support ribs 23 are not provided (upper and lower edges on the paper surface of FIG. 5). 29 unnecessary movements can be restricted. Of course, the support ribs 23 may be provided on the upper and lower edges on the paper surface of FIG.
[0040]
In the embodiment, the case 15 used in the side impact airbag device M arranged in the seat back portion 2 has been described. However, if the airbag to be folded is accommodated, the side impact airbag device is used. Regardless of what is used for M, the present invention is applied to a case for storing an airbag such as a passenger seat airbag device disposed on an instrument panel, a head protection airbag device disposed on a roof side rail, or the like. Can be implemented.
[Brief description of the drawings]
FIG. 1 is a side view of a seat showing a usage mode of an airbag device in which a case according to an embodiment of the present invention is used.
2 is a schematic cross-sectional view taken along a line II-II in FIG.
FIG. 3 is an enlarged view showing a main part of the case with the lid closed according to the embodiment;
FIG. 4 is an enlarged view of another part of the case with the lid closed according to the embodiment;
FIG. 5 is a development view of the case with the lid opened according to the embodiment;
6 is a schematic cross-sectional view taken along a VI-VI part in FIG.
7 is a schematic cross-sectional view of the VII-VII site in FIG. 5. FIG.
[Explanation of symbols]
3 ... (Mounting part) Seat frame,
11 ... Airbag,
15 ... Airbag case,
16 ... the base,
19 ... (base / peripheral wall) tip,
20 ... end face,
21 ... Regulating ribs,
22 ... recess,
23 ... support ribs,
26 ... Lid,
29 ... (base / peripheral wall) tip,
30 ... the end face,
33 ... Hinge part,
t: thickness dimension,
w: Opening width dimension,
M: Airbag device.

Claims (1)

折り畳まれたエアバッグの周囲を覆って収納可能な断面略四角筒形状の合成樹脂製として、
取付部位に連結固定される基部と、
該基部の一端とヒンジ部を介して連結されて、前記基部と対向するように延び、膨張時の前記エアバッグに押されて開くリッドと、
を備えて構成され、
前記基部の他端側の先端と前記リッドの先端とが、端面相互を突き合わせ状態で当接させるとともに、前記エアバッグの膨張時以外に開かないように相互に係合される係止脚と係止孔とを部分的に備えて、構成されるエアバッグ用ケースであって、
前記基部が、略長方形板状として周縁の1辺に前記ヒンジ部を連結させた背板部と、該背板部の周縁における前記ヒンジ部を除いた3辺の周縁から前記背板部に略直交するように延びる周壁部と、を備えて構成され、
前記リッドが、前記背板部と対向するように配置される略長方形板状の蓋本体部と、該蓋本体部の周縁から四角筒状に延びて先端の一部を前記ヒンジ部と連結させる周壁部と、を備えて構成され、
前記基部の周壁部と前記リッドの周壁部とが、前記ヒンジ部側と前記係止脚・前記係止孔との配置部位を除いた先端に、前記基部と前記リッドとの係合時に相互に突き合わせ状態で当接させる端面を配置させ、
前記基部の周壁部の先端における前記リッドの周壁部の端面と当接する前記基部の周壁部の端面の外側部位に、前記基部の周壁部と略平行に延びて、前記基部の周壁部と前記リッドの周壁部との端面相互の当接時に、前記リッドの周壁部の先端の外側部位を覆い可能として、前記リッドの前記基部側への押圧時における前記リッドの周壁部の先端が前記基部の周壁部の端面から前記ケースの外側方向へ逃げる移動を規制する規制リブが、前記基部の周壁部の全周にわたって、設けられ
前記係止孔が、複数設けられて、それぞれ、前記リッドの周壁部の端面に当接する前記基部の周壁部の端面から前記背板部側に凹む凹部を設けるとともに、前記規制リブの根元部位で、前記基部の周壁部を開口させて、形成され、
前記係止脚が、前記リッドの周壁部の先端において、それぞれ、周囲の前記リッドの周壁部の端面との間に、前記係止脚を前記ケースの外側方向と内側方向とへ撓み可能に、前記リッドの周壁部の端面から前記蓋本体部側に凹むように切り欠かれた凹部、を設けるとともに、前記ケースの外側方向に突出して、前記係止孔の周縁における前記規制リブ側の縁に係止される鉤部、を設けて形成され、
前記基部の周壁部における前記ヒンジ部から最も離れた縁側において、
前記リッドの周壁部の端面と当接する前記基部の周壁部の端面の内側部位に、前記リッドの周壁部の端面の厚さ寸法より開口幅寸法を小さくして前記背板部側に凹む凹部を設けて、前記背板部からの先端の高さを前記基部の周壁部の端面と略同じ高さとして、前記基部の周壁部と略平行に延びるように突設され、前記リッドの前記基部側への押圧時における前記リッドの周壁部の先端が前記基部の周壁部の端面から前記ケースの内側方向へ逃げる移動を、前記リッドの周壁部の先端の一部を前記背板部側に凹む前記凹部に入り込ませた状態として前記リッドの周壁部の端面を当接させることにより、規制する支持リブが、配設されるとともに、
前記係止脚を係止する前記係止孔が、配設されて、該係止孔の周囲における前記ケースの内側部位に、前記係止脚の前記係止孔周縁への係止時に、前記鉤部を案内可能とし、かつ、前記リッドの前記基部側への押圧時における前記係止脚鉤部の前記ケースの内側方向へ逃げる移動を規制可能とする案内リブが、前記基部の周壁部と略平行に延びるように突設されて、配設されていることを特徴とするエアバッグ用ケース。
As a product made of synthetic resin with a substantially square cylindrical cross section that can be stored covering the periphery of the folded airbag,
A base connected and fixed to the attachment site;
A lid connected to one end of the base portion via a hinge portion, extending so as to face the base portion, and being opened by being pushed by the airbag during inflation;
Configured with
The front end of the other end side of the base and the front end of the lid are brought into contact with each other in an abutting state and engaged with a locking leg engaged with each other so as not to open except when the airbag is inflated. A case for an air bag configured partially with a stop hole,
The base has a substantially rectangular plate shape, and a back plate part in which the hinge part is connected to one side of the periphery, and a peripheral part of the three sides excluding the hinge part at the periphery of the back plate part. And a peripheral wall portion extending so as to be orthogonal,
The lid has a substantially rectangular plate-like lid body portion disposed so as to face the back plate portion, and extends from the periphery of the lid body portion into a rectangular tube shape so that a part of the tip is connected to the hinge portion. A peripheral wall portion,
When the base and the lid are engaged , the peripheral wall of the base and the peripheral wall of the lid are disposed at the distal end excluding the arrangement portion of the hinge part and the locking leg / locking hole. Place the end face to be abutted in the butted state,
Outside portion of the end surface of the peripheral wall portion of the end surface and said base portion for abutment of the circumferential wall portion of the lid definitive the tip of the peripheral wall of the base portion, extends substantially parallel to the peripheral wall of the base portion, the peripheral wall portion of the base when the end face mutual contact between the peripheral wall portion of the lid, as can not covering the outer portion of the front end of the peripheral wall portion of the lid, tip the base of the peripheral wall of the lid at the time of pressing to the base side of the lid A regulation rib for regulating movement to escape from the end face of the peripheral wall portion toward the outer side of the case is provided over the entire circumference of the peripheral wall portion of the base portion ,
A plurality of the locking holes are provided, respectively, and a recess that is recessed from the end surface of the peripheral wall portion of the base portion that contacts the end surface of the peripheral wall portion of the lid to the back plate portion side is provided, and at the base portion of the regulation rib , Formed by opening the peripheral wall portion of the base,
The locking leg can be bent in the outer side direction and the inner side direction of the case between the end surface of the peripheral wall part of the surrounding lid at the tip of the peripheral wall part of the lid, A recess cut out from the end surface of the peripheral wall portion of the lid so as to be recessed toward the lid main body portion, and protrudes toward the outer side of the case, at the edge on the regulation rib side at the periphery of the locking hole Formed with a hook part to be locked,
On the edge side farthest from the hinge part in the peripheral wall part of the base part,
On the inner side portion of the end surface of the peripheral wall portion of the base, which is in contact with the end surface of the peripheral wall portion of the lid , a concave portion that is recessed toward the back plate portion by making the opening width dimension smaller than the thickness dimension of the end surface of the peripheral wall portion of the lid. The base of the lid is provided so as to protrude substantially parallel to the peripheral wall of the base, with the height of the tip from the back plate being substantially the same as the end surface of the peripheral wall of the base The movement of the distal end of the peripheral wall portion of the lid escaping from the end surface of the peripheral wall portion of the base portion toward the inner side of the case at the time of pressing toward the side is recessed in the back plate portion side. by abutting the end surface of the peripheral wall of the lid in a state where intruded into the recess, the support ribs which regulations are disposed Rutotomoni,
The locking hole for locking the locking leg is disposed, and when the locking leg is locked to the periphery of the locking hole at the inner portion of the case around the locking hole, A guide rib that can guide the flange portion and that can restrict movement of the locking leg flange portion to the inside of the case when the lid is pressed toward the base side, and a peripheral wall portion of the base portion. A case for an airbag, wherein the airbag case is provided so as to protrude substantially in parallel .
JP07199898A 1998-03-20 1998-03-20 Airbag case Expired - Lifetime JP3921791B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP07199898A JP3921791B2 (en) 1998-03-20 1998-03-20 Airbag case

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP07199898A JP3921791B2 (en) 1998-03-20 1998-03-20 Airbag case

Publications (2)

Publication Number Publication Date
JPH11268603A JPH11268603A (en) 1999-10-05
JP3921791B2 true JP3921791B2 (en) 2007-05-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP07199898A Expired - Lifetime JP3921791B2 (en) 1998-03-20 1998-03-20 Airbag case

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