JP4056716B2

JP4056716B2 - Airbag cover

Info

Publication number: JP4056716B2
Application number: JP2001205138A
Authority: JP
Inventors: 直哉林
Original assignee: Ashimori Industry Co Ltd
Current assignee: Ashimori Industry Co Ltd
Priority date: 2001-07-05
Filing date: 2001-07-05
Publication date: 2008-03-05
Anticipated expiration: 2021-07-05
Also published as: JP2003011764A

Description

【０００１】
【発明の属する技術分野】
この発明は、装飾部材を備えたエアバッグカバーに関する。
【０００２】
【従来の技術】
自動車のステアリングホイールには、ガスを噴射可能なインフレータと、このインフレータからの噴射ガスにより膨張展開可能なエアバッグと、このエアバッグを覆うカバー体とを備えたエアバッグ装置が組込まれている。
【０００３】
前記エアバッグは、通常時においては折畳まれた形態で前記カバー体の内部に収納されており、衝突などの非常時には、インフレータから噴射されるガスにより膨張し、前記カバー体を割開いて運転者の前方に膨張展開する構成となっている。
【０００４】
ところで、上記カバー体の外面には、装飾的効果を高める等の目的で、当該カバー体とは別体に形成した装飾部材を取付ける場合がある。
【０００５】
従来、装飾部材をカバー体に取付ける構成として、特開平９−１１８３３号公報や特開平１０−１１９６８３号公報に開示のものがある。
【０００６】
これらの公報は、基本的に、装飾部材に突設されたシャフトをカバー体に貫設し、装飾部材をカバー体に向けて強く押え込んだ状態で、カバー体の裏面側に突出するシャフトの先端部をバックプレートに形成された係合孔に係合させて抜止め保持するタイプの構成を開示している。
【０００７】
また、装飾部材をカバー体に取付ける別タイプの構成として、特開平１０−３５３８９号公報に開示のものがある。
【０００８】
この公報に開示のものでは、略円盤状の装飾部材の外周部にその周方向に沿って間欠的に複数の係止部を形成する一方、カバー体には前記装飾部材を挿入可能な略円孔状の挿入部を形成すると共にその挿入部周りに前記各係止部に係止可能な複数の傾斜リブを間欠的に形成している。そして、前記各係止部を、前記各傾斜リブ間を通ってカバー体の裏面側に位置するように、装飾部材を挿入部に挿入し、前記装飾部材をカバー体に向けて押え込みつつ回転させることにより、各係止部を各傾斜リブに係合させるようにしている。
【０００９】
【発明が解決しようとする課題】
しかしながら、特開平９−１１８３３号公報や特開平１０−１１９６８３号公報に開示のタイプのものでは、シャフトの先端部をバックプレートに形成された係合孔に係合させる際、装飾部材をカバー体に向けて強く押え込む必要があり、装飾部材の損傷や破損を招く恐れがあった。また、装飾部材に形成されたシャフト部の先端部を、バックプレートに形成された係合孔に係合させて抜止め保持するだけの構成であるため、装飾部材をカバー体に引きつける力が不十分で当該装飾部材の取付状態が不安定なものとなっていた。
【００１０】
また、特開平１０−３５３８９号公報に開示のものでは、各係止部を各傾斜リブに係合させる際に、装飾部材をカバー体に向けて押え込みつつ回転させる必要があり、やはり装飾部材の破損を招く恐れがあった。
【００１１】
そこで、この発明の課題は、装飾部材に強い力を加えることなく当該装飾部材をカバー体に取付可能で、かつ、その装飾部材の取付状態を安定させることができるエアバッグカバーを提供することにある。
【００１２】
【課題を解決するための手段】
上記課題を解決すべく、請求項１記載のエアバッグカバーは、その裏面に係合部を有する係合突出片が突出形成された装飾部材と、前記係合突出片を貫通可能な貫通孔が形成されたカバー体と、前記カバー体の裏面側に突出する装飾部の前記係合突出片の係合部を挿通可能な挿通孔部が形成されると共に、該挿通孔部と連続して前記係合部が抜止め状に係合可能な被係合部が形成されたバックプレートと、を備え、前記バックプレート側に弾性付勢部が設けられると共に、前記カバー体の裏面側に、前記弾性付勢部が当接する付勢部当接部が設けられ、前記バックプレートが、前記バックプレートの前記挿通孔部に前記貫通孔を貫通した前記係合突出片を貫通可能な挿通位置から、前記バックプレートの前記被係合部に前記係合突出片を係合する係合位置に移動することにより、前記バックプレートの前記弾性付勢部を前記カバー体の前記付勢部当接部に当接させて、前記係合部が係合する部分を前記カバー体の裏面から離隔する方向に付勢するものである。
【００１３】
なお、請求項２記載のように、前記被係合部は、前記挿通孔部に向けて延びるように片持ち支持された被係合突出片を有し、前記弾性付勢部として、前記被係合突出片の先端部より段部を介して前記カバー体の裏面に向けて突出する弾性突出片が形成され、前記カバー体の裏面側に、前記挿通位置に配設された前記バックプレートの弾性突出片に対応する部分にその弾性突出片の突出寸法よりも大きい深さ寸法の第１凹部が形成されると共に、前記付勢部当接部として、前記第１凹部に隣設して前記係合位置に配設された前記バックプレートの弾性突出片に対応する部分にその弾性突出片の突出寸法よりも小さい深さ寸法の第２凹部が形成されていてもよい。
【００１４】
また、請求項３記載のように、前記弾性付勢部として、前記被係合部から離れた位置で前記カバー体の裏面に向けて突出する弾性突出部が形成され、前記カバー体の裏面側に、前記挿通位置に配設された前記バックプレートの弾性突出部に対応する部分にその弾性突出部の突出寸法よりも大きい深さ寸法の第１凹部が形成されると共に、前記付勢部当接部として、前記第１凹部に隣設して前記係合位置に配設された前記バックプレートの弾性突出部に対応する部分にその弾性突出部の突出寸法よりも小さい深さ寸法の第２凹部が形成されていてもよい。
【００１５】
ここで、請求項４記載のように、前記第１凹部と前記第２凹部との間に突条部が形成されていてもよい。
【００１６】
この場合、請求項５記載のように、前記弾性突出片又は前記弾性突出部のうち、前記弾性突出片又は前記弾性突出部が前記第１凹部に配設された状態における前記第２凹部側の部分に、その第２凹部に向けて前記カバー体の裏面から離隔する方向に傾斜するガイド傾斜部が形成されていてもよい。
【００１７】
さらに、請求項６記載のように、前記装飾部材に係合軸部が突出形成されると共に係合軸部は前記カバー体に形成された貫通軸孔を通って前記カバー体の裏面側に突出しており、前記バックプレートには、前記係合軸部を挿通可能な軸係合孔部が形成されると共に、そのバックプレートが前記係合軸部を前記軸係合孔部に挿通させた状態で、その係合軸部周りに回転することにより前記挿通位置から前記係合位置に向けて移動自在とされ、前記係合軸部の先端部に抜止係合突部が形成されると共に、前記軸係合孔部は、前記挿通位置で前記係合軸部の抜止係合突部を挿通可能でかつ前記係合位置で前記抜止係合突部が抜止め状に係合可能な形状に形成されていてもよい。
【００１８】
また、前記バックプレートが前記カバー体の裏面側で所定の回転軸周りに回転移動することにより、前記挿通位置から前記係合位置に向けて移動するようにした場合には、請求項７記載のように、前記弾性付勢部及びそれに対応する付勢部当接部がそれぞれ複数設けられると共に、前記各弾性付勢部は前記回転軸周りでその回転軸に対して実質的に等角度の位置で対応する前記各付勢部当接部に当接するようにするとよい。
【００１９】
【発明の実施の形態】
以下、この発明の実施の形態に係るエアバッグカバーについて説明する。
【００２０】
このエアバッグカバーは、図１〜図３に示すように、装飾部材１と、カバー体２０と、バックプレート５０とを備える。
【００２１】
装飾部材１は、樹脂等により形成されるもので、図５〜図１１に示すように、装飾本体部２の裏面側に、係合部６ａ，６ｂを有する係合突出片５ａ，５ｂが突出形成されてなる。
【００２２】
装飾本体部２は、カバー体２０の前面側に取付けられるもので、自動車のエンブレムやロゴマーク，車名を表す文字等を形取った形状に形成されて装飾的効果を高める等の役割を果す。本実施の形態では、横方向に長い略長円形状の枠体部３の内部に略Ｙ字状の内装飾部４を形成した形状となっている。
【００２３】
装飾本体部２には、次に説明する２タイプの係合突出片５ａ，５ｂが突出形成される。
【００２４】
係合突出片５ａは、装飾本体部２の上部及び下側両側部の裏面に突出形成されたもので、先端部に突起状の係合部６ａが形成されてなる。より具体的には、各係合突出片５ａは、後述する係合軸部１５を中心とする仮想円弧ラインに沿って湾曲する板状部材に形成されており、その先端縁部に装飾本体部２の外側に向けて突出する突起状の係合部６ａが形成された形状とされ、後述する被係合部５６ａに係合可能に構成されている（図１３参照）。なお、各係合部６ａは、後述する貫通孔２５ａ，２５ｂ及び挿通孔部５５ａ，５５ｂに挿入し易いように、その先端方向に向けて順次薄肉になる形状に形成される。
【００２５】
係合突出片５ｂは、装飾本体部２の上側両側部（内装飾部４の斜め上方に向う部分が枠体部３に連結される部分）の裏面に突出形成されたもので、先端部に係合部６ｂが突出形成されてなる。より具体的には、各係合突出片５ｂは、係合軸部１５から延びるラインに沿って所定間隔あけて突出形成された支持片７ｂの先端部間に係合部６ｂが掛渡し支持された略Ｕ字状形状に形成される。そして、後述する被係合突出片５７ｂを係合突出片５ｂ内の孔に挿通して係合部６ｂに係合可能なように構成されている（図１３参照）。
【００２６】
カバー体２０は、樹脂等により形成されるもので、図１〜図３に示すように、椀状の全体形状を有し、図示省略のステアリングホイールのボス部にそれを覆うようにして取付け可能に形成される。そして、その裏面側内部に図示省略のエアバッグが折畳まれた形態で組込まれ、衝突などの非常時に、図示省略のインフレータから噴射されるガスによりエアバッグが膨張すると、そのエアバッグが膨張する力を受けてカバー体２０が所定のティアラインＬに沿って割れ、当該エアバッグが運転者の前方に膨張展開可能なようになっている。
【００２７】
このカバー体２０には、図１〜図４，図１２及び図１３に示すように、上記係合突出片５ａ，５ｂを貫通可能な貫通孔２５ａ，２５ｂが形成される。
【００２８】
即ち、カバー体２０の前面部の略中央部に、略平板状の装飾取付部２１が形成され、その装飾取付部２１の前面部には、上記装飾本体部２の形状に対応する凹陥部２３が形成される。そして、上記装飾本体部２を凹陥部２３内に嵌め込むようにして装飾取付部２１の前面側に所定姿勢で配設可能なように構成される。
【００２９】
装飾取付部２１には、前述のように装飾部材１を取付けた状態で、各係合突出片５ａ，５ｂと対応する位置に貫通孔２５ａ，２５ｂが形成される。そして、各係合突出片５ａ，５ｂを貫通孔２５ａ，２５ｂに挿入するようにして、装飾本体部２を装飾取付部２１の前面側に配設すると、各係合突出片５ａ，５ｂの先端部が装飾取付部２１の裏面側に突出した状態となる。
【００３０】
なお、装飾取付部２１の裏面側には、略円環状のガイド突条部２１ａが形成されており、バックプレート５０はガイド突条部２１ａ内で回転移動する。
【００３１】
バックプレート５０は、図２〜図４及び図１２〜図１４に示すように、カバー体２０の裏面側で装飾部材１をカバー体２０に取付保持する機能を有する。
【００３２】
即ち、バックプレート５０は、カバー体２０の裏面に面接触した状態で図１２に示す所定の挿通位置から図１３に示す所定の係合位置に向けて移動自在に配設される。本実施の形態では、バックプレート５０は、金属材料により円板形状に形成された部材であり、カバー体２０の裏面に所定の挿通位置（図１２参照）から所定の係合位置（図１３参照）に向けて（図１２の右回りに）回転移動自在に配設される。
【００３３】
なお、このバックプレート５０には、その回転中心を挟んで一対の回転移動用孔部５９が形成されており、所定の治具に形成された突起部を前記回転移動用孔部５９に挿入した状態で当該治具を回転させることで、バックプレート５０を容易に回転移動できるようになっている。
【００３４】
このバックプレート５０には、前記挿通位置でカバー体２０の裏面側に突出する係合突出片５ａ，５ｂを挿通可能な挿通孔部５５ａ，５５ｂが形成されると共に前記係合位置で係合部６ａ，６ｂを抜止め状に係合可能な被係合部５６ａ，５６ｂが形成されてなる。
【００３５】
前記挿通孔部５５ａ，５５ｂ及び被係合部５６ａ，５６ｂとしては、上記係合突出片５ａ，５ｂに対応して２タイプのものがある。
【００３６】
まず、各係合突出片５ａに対応するものとして、挿通孔部５５ａ及び被係合部５６ａが複数組（ここでは３組）形成される。各挿通孔部５５ａは、バックプレート５０が挿通位置に配設された状態で各係合突出片５ａの係合部６ａを挿通可能なスリット形状に形成されている。また、各被係合部５６ａは、各係合突出片５ａの係合部６ａを抜止め状に係合可能な形状、即ち、上記挿通孔部５５ａよりも幅狭なスリット形状に形成されている。これら各挿通孔部５５ａ及び各被係合部５６ａは、バックプレート５０の回転中心を中心とする仮想円周方向に沿って延びるように連設されている。
【００３７】
そして、バックプレート５０をカバー体２０の裏面の挿通位置に配設した状態で、カバー体２０の裏面側に突出する各係合突出片５ａの先端部が対応する各挿通孔部５５ａに挿通されて、各係合部６ａがバックプレート５０の裏面側に突出配置される（図１２参照）。この状態で、バックプレート５０を挿通位置から係合位置に向けて回転移動させると、各係合突出片５ａの先端部が対応する各被係合部５６ａに入り込んで、各係合部６ａが各被係合部５６ａに抜止め状に係合されることとなる（図１３参照）。
【００３８】
また、各係合突出片５ｂに対応するものとして、挿通孔部５５ｂ及び被係合部５６ｂが複数組（ここでは２組）形成される。各挿通孔部５５ｂは、バックプレート５０が挿通位置に配設された状態で各係合突出片５ｂの係合部６ｂを挿通可能な孔形状に形成されている。また、各被係合部５６ｂは、各係合突出片５ｂを挿通可能な孔部５８ｂ内に前記挿通孔部５５ｂに向けて延びる姿勢で帯状の被係合突出片５７ｂが片持ち支持された構成とされる。これら各挿通孔部５５ｂ及び被係合部５６ｂは、バックプレート５０の回転中心を中心とする仮想円周方向に沿って連設されている。
【００３９】
そして、バックプレート５０をカバー体２０の裏面の挿通位置に配設した状態で、カバー体２０の裏面側に突出する各係合突出片５ｂの先端部が対応する各挿通孔部５５ｂに挿通され、各係合部６ｂがバックプレート５０の裏面側に突出配置とされる（図１２参照）。この状態で、バックプレート５０を挿通位置から係合位置に向けて回転移動させると、各被係合突出片５７ｂが各係合突出片５ｂ内に挿通されてその先端部の各係合部６ｂに抜止め状に係合されることとなる（図１３参照）。
【００４０】
上記係合突出片５ａ，５ｂと被係合部５６ａ，５６ｂとの係合構造により、バックプレート５０が装飾部材１から所定距離以上離隔しないように保持される。
【００４１】
また、カバー体２０の裏面側に付勢部当接部として第２凹部３０ａ，３０ｂが形成されると共に、バックプレート５０側に前記係合位置で前記第２凹部３０ａに当接する弾性付勢部として弾性突出部６０ａ及び前記第２凹部３０ｂに当接する弾性付勢部として弾性突出片６０ｂが形成される。
【００４２】
このうち第２凹部３０ａはカバー体２０（装飾取付部２１）の下部に設けられ、弾性突出部６０ａはバックプレート５０の下部に設けられる。
【００４３】
弾性突出部６０ａは、図１２〜図１５に示すように、各被係合部５６ａ，５６ｂから離れた位置でカバー体２０の裏面に向けて突出するものであって、具体的には、バックプレート５０の下部より若干内方の部分をバックプレート５０の外周方向に沿ってその両端部を残して帯状に切抜くと共に、その切抜き部分をバックプレート５０の表面側に突出するように屈曲した構成とされる。
【００４４】
また、図１２，図１３及び図１７に示すように、カバー体２０の裏面には、バックプレート５０が挿通位置から係合位置に回転移動する際の弾性突出部６０ａの弧状回転軌跡上に、第１凹部３１ａ及び第２凹部３０ａが形成される。
【００４５】
第１凹部３１ａは、カバー体２０の装飾取付部２１の裏面であって、前記挿通位置に配設されたバックプレート５０の弾性突出部６０ａと対応する位置に形成されており、その深さ寸法は、上記弾性突出部６０ａの突出寸法よりも大きく設定されている。また、第２凹部３０ａは、カバー体２０の装飾取付部２１の裏面であって、前記係合位置に配設されたバックプレート５０の弾性突出部６０ａと対応する位置に上記第１凹部３１ａに隣設して形成されており、その深さ寸法は、上記弾性突出部６０ａの突出寸法よりも小さく設定されている。なお、第１凹部３１ａ，第２凹部３０ａの深さ寸法及び弾性突出部６０ａの突出寸法は、バックプレート５０と装飾取付部２１の裏面との接触面を基準とする（後述する第１凹部３１ｂ，第２凹部３０ｂの深さ寸法及び弾性突出片６０ｂの突出寸法についても同じ）。
【００４６】
バックプレート５０を装飾取付部２１の裏面側の挿通位置に配設した状態では、弾性突出部６０ａが第１凹部３１ａ内にその底面に接触することなく収容される（図１２，図１７の２点鎖線参照）一方、バックプレート５０を装飾取付部２１の裏面側で挿通位置から係合位置に回転移動させた状態では、弾性突出部６０ａが第２凹部３０ａ内にその底面に弾接した状態で収容される（図１３及び図１７の実線参照）。この弾性突出部６０ａの弾性力により、主としてバックプレート５０の下半部分（各被係合部５６ａを含む）がカバー体２０の裏面から離間する方向に付勢されることとなる。
【００４７】
この場合、被係合部５６ａ等から離れた位置に弾性突出部６０ａが設けられているため、バックプレート５０のうち比較的広範囲な部分（本実施の形態では２つの被係合部５６ａ等を含む部分）をカバー体２０の裏面から離隔する方向に付勢することができる。
【００４８】
なお、上記第１凹部３１ａと第２凹部３０ａとの境界線に沿って突条部３２ａが形成されており、この突条部３２ａにより第２凹部３０ａに収容された弾性突出部６０ａが第１凹部３１ａ側に移動するのを規制するようにしている。
【００４９】
また、弾性突出部６０ａのうち、当該弾性突出部６０ａが第１凹部３１ａに配設された状態における第２凹部３０ａ側の部分に、その第２凹部３０ａ側に向けてカバー体２０の裏面側から離隔する方向に傾斜するガイド傾斜部６１ａが形成され、その反対側の部分は、略直角に屈曲した形状とされている。そして、バックプレート５０を挿通位置から係合位置に回転移動させる際に、ガイド傾斜部６１ａを突条部３２ａに摺接させることにより弾性突出部６０ａ全体を持上げさせて当該弾性突出部６０ａが突条部３２ａを容易に乗越えることができるようにしている。また、弾性突出部６０ａが第２凹部３０ａに収容された状態では弾性突出部６０ａの略直角屈曲部分が突条部３２ａに当接して当該弾性突出部６０ａが突条部３２ａを乗越え難いようになっている。
【００５０】
また、第２凹部３０ｂはカバー体２０（装飾取付部２１）の上側両側部に設けられ、弾性突出片６０ｂはバックプレート５０の上側両側部に設けられる。
【００５１】
各弾性突出片６０ｂは、図１２〜図１４及び図１６に示すように、上記各被係合突出片５７ｂの先端部より段部６２ｂを介してカバー体２０の裏面に向けて突出するように形成されてなる。
【００５２】
また、図１２，図１３及び図１８に示すように、カバー体２０の裏面には、バックプレート５０が挿通位置から係合位置に回転移動する際の各弾性突出片６０ｂの各弧状回転軌跡上に第１凹部３１ｂ及び第２凹部３０ｂがそれぞれ形成される。
【００５３】
第１凹部３１ｂは、カバー体２０の装飾取付部２１の裏面であって装飾位置に配設されたバックプレート５０の弾性突出片６０ｂと対応する位置に形成されており、その深さ寸法は、上記弾性突出片６０ｂの突出寸法よりも大きく設定されている。また、第２凹部３０ｂは、カバー体２０の装飾取付部２１の裏面であって係合位置に配設されたバックプレート５０の弾性突出片６０ｂと対応する位置に上記第１凹部３１ｂに隣設して形成されており、その深さ寸法は、弾性突出片６０ｂの突出寸法よりも小さく設定されている。
【００５４】
そして、バックプレート５０を装飾取付部の裏面の挿通位置に配設した状態では、弾性突出片６０ｂが第１凹部３１ｂ内にその底面に接触することなく収容配置される（図１２，図１８の２点鎖線参照）一方、バックプレート５０を装飾取付部２１の裏面で挿通位置から係合位置に回転移動させた状態では、弾性突出片６０ｂが第２凹部３０ｂ内にその底面に弾接した状態で収容される（図１３，図１８実線参照）。この各弾性突出片６０ｂの弾性力により、バックプレート５０のうち被係合部５６ｂを形成した部分が、カバー体２０の裏面から離隔する方向に向けて付勢されることとなる。
【００５５】
この場合、被係合突出片５７ｂの先端部に弾性突出片６０ｂが設けられているため、装飾部材１側の係合突出片５ｂが係合する被係合突出片５７ｂを効果的にカバー体２０の裏面から離隔する方向に付勢することができる。
【００５６】
なお、これら第１凹部３１ｂと第２凹部３０ｂとの境界線に沿っても突条部３２ｂが形成されており、この突条部３２ｂにより第２凹部３０ｂに収容された弾性突出片６０ｂが第１凹部３１ｂ側に移動するのを規制するようにしている。
【００５７】
また、弾性突出片６０ｂのうち、当該弾性突出片６０ｂが第１凹部３１ｂに配設された状態における第２凹部３０ｂ側の部分に、その第２凹部３０ｂ側に向けてカバー体２０の裏面側から離隔する方向に傾斜するガイド傾斜部６１ｂが形成され、その反対側の部分は、略直角に屈曲した形状の段部６２ｂに形成されている。そして、バックプレート５０を挿通位置から係合位置に回転移動させる際には、ガイド傾斜部６１ｂを突条部３２ｂに摺接させて弾性突出片６０ｂ全体を持上げさせることにより、当該弾性突出片６０ｂが突条部３２ｂを容易に乗越えることができるようにしている。一方、弾性突出片６０ｂが第２凹部３０ｂに収容された状態では段部６２ｂが突条部３２ｂに当接することにより弾性突出片６０ｂが突条部３２ｂを乗越え難いようにしている。
【００５８】
また、本実施の形態においては、弾性付勢部（弾性突出部６０ａ，弾性突出片６０ｂ）及び対応する付勢部当接部（第２凹部３０ａ，３０ｂ）がそれぞれ複数設けられており、各弾性付勢部（弾性突出部６０ａ，弾性突出片６０ｂ）はバックプレート５０の回転軸周りでその回転軸に対して実質的に等角度の位置で対応する付勢部当接部（第２凹部３０ａ，３０ｂ）に当接する。
【００５９】
より具体的に説明すると、弾性突出部６０ａはバックプレート５０（装飾取付部２１）の下部で対応する第２凹部３０ａに当接し、弾性突出片６０ｂはバックプレート５０の上側両側部で対応する第２凹部３０ｂに当接する。従って、各弾性付勢部（弾性突出部６０ａ，弾性突出片６０ｂ）は、バックプレート５０の回転軸周りにその回転軸を中心に１２０度の間隔で対応する付勢部当接部（第２凹部３０ａ，３０ｂ）に当接する。これにより、バックプレート５０をその外周周りで可及的に均等な力で装飾取付部２１の裏面から離隔する方向に付勢するようにしている。
【００６０】
また、図４，図６，図８〜図１０に示すように、上記装飾部材１の装飾本体部２の裏面略中央部（バックプレート５０の回転中心に対応する位置）に係合軸部１５が形成されると共に、図１〜図４，図１２及び図１３に示すように、カバー体２０の装飾取付部２１の略中央部（バックプレート５０の回転中心に対応する位置）に前記係合軸部１５を貫通可能な貫通軸孔３５が形成される。そして、装飾部材１をカバー体２０に取付けた状態で、係合軸部１５が貫通軸孔３５を貫通して当該係合軸部１５の先端部が装飾取付部２１の裏面側に突出している。
【００６１】
また、図１２〜図１４に示すように、バックプレート５０の回転中心に、軸係合孔部６５が形成されており、前記係合軸部１５の先端部が前記軸係合孔部６５に挿通される。そして、前記係合軸部１５の先端部を前記軸係合孔部６５に挿通させた状態で、バックプレート５０が装飾取付部２１の裏面側に配設される。これにより、バックプレート５０が、係合軸部１５を中心に、挿通位置から係合位置に向けて正確に回転移動する構成とされる。
【００６２】
さらに、係合軸部１５の先端部に抜止係合突部１６が形成されると共に、前記軸係合孔部６５は、バックプレート５０を挿通位置に配設した状態で抜止係合突部１６を挿通可能でかつ前記係合位置に配設した状態で抜止係合突部１６を抜止状に係合可能な形状に形成される。
【００６３】
本実施の形態では、抜止係合突部１６は、裏面側からみて水滴形状に形成されており、軸係合孔部６５は、前記抜止係合突部１６に対応する水滴形状であってバックプレート５０を挿通位置に配設した状態で抜止係合突部１６を挿通可能な形状に形成される。
【００６４】
そして、装飾部材１を装飾取付部２１に仮取付けして係合軸部１５を貫通軸孔３５に通して装飾取付部２１の裏面側に突出させた状態で、バックプレート５０を装飾取付部２１の裏面側の挿通位置に配設すると、係合軸部１５の先端部が軸係合孔部６５に挿通され、抜止係合突部１６がバックプレート５０の裏面側に突出配置される。この後、バックプレート５０を挿通位置から係合位置に向けて回転移動させると、抜止係合突部１６が軸係合孔部６５に抜止め状に係合する構成となっている。この抜止係合突部１６と軸係合孔部６５との係合構造により、装飾部材１の中央部分もカバー体２０内に引込み保持される。
【００６５】
以上のように構成されたエアバッグカバーの組立手順について説明する。
【００６６】
まず、装飾部材１の各係合突出片５ａ，５ｂ及び係合軸部１５を、対応する貫通孔２５ａ，２５ｂ及び貫通軸孔３５にカバー体２０の前面側から挿入するようにして、装飾部材１をカバー体２０に仮取付けする。この状態では、カバー体２０の装飾取付部２１の裏面側に各係合突出片５ａ，５ｂ及び係合軸部１５の先端部が突出した状態となっている。
【００６７】
次に、バックプレート５０を装飾取付部２１の背面に接触させるようにして配設する。この際、バックプレート５０を挿通位置に配設して、各係合突出片５ａ，５ｂ及び係合軸部１５の先端部を、対応する挿通孔部５５ａ，５５ｂ及び軸係合孔部６５に挿通させる（図１２参照）。この状態では、弾性突出部６０ａ，各弾性突出片６０ｂは第１凹部３１ａ，３１ｂに非当接状態で収容され、弾性突出部６０ａ，各弾性突出片６０ｂの付勢力はバックプレート５０に作用していない。
【００６８】
なお、バックプレート５０を装飾取付部２１の背面側の挿通位置に配設した状態で、装飾部材１をカバー体２０に仮取付してもよい。
【００６９】
次に、バックプレート５０を、係合軸部１５周りに挿通位置から係合位置に回転移動させる（図１３参照）。これにより、各係合突出片５ａ，５ｂの係合部６ａ，６ｂが各被係合部５６ａ，５６ｂに抜止め状に係合すると共に、係合軸部１５の抜止係合突部１６が軸係合孔部６５に抜止め状に係合する。また、弾性突出部６０ａ，各弾性突出片６０ｂが対応する第２凹部３０ａ，３０ｂの底面に当接し、バックプレート５０のうち少なくとも係合部６ａ，６ｂを係合させた部分がカバー体２０の裏面から離隔する方向に付勢される。従って、弾性突出部６０ａ，各弾性突出片６０ｂの付勢力により、各被係合部５６ａ，５６ｂに抜止め状に係合した各係合突出片５ａ，５ｂ及び軸係合孔部６５に抜止め状に係合した係合軸部１５もカバー体２０内に向けて強く引込まれて、装飾部材１がカバー体２０に強く引きつけられた状態で、装飾部材１がカバー体２０に取付けられる。
【００７０】
以上のように構成されたエアバッグカバーによると、バックプレート５０を挿通位置に配設した状態で、装飾部材１の係合突出片５ａ，５ｂを挿通孔部５５ａ，５５ｂに挿通させ、この後、バックプレート５０を挿通位置から係合位置に移動させると、係合部６ａ，６ｂが被係合部５６ａ，５６ｂに抜止め状に係合して、装飾部材１がカバー体２０に取付けられる。このように、バックプレート５０を挿通位置から係合位置に移動させるだけで、装飾部材１に押込み方向の強い力を加えることなく、当該装飾部材１をカバー体２０に取付けることができる。
【００７１】
しかも、装飾部材１をカバー体２０に取付けた状態では、バックプレート５０側の弾性突出部６０ａ，各弾性突出片６０ｂがカバー体２０の裏面側に形成された付勢部当接部である第２凹部３０ａ，３０ｂに当接して、バックプレート５０のうち少なくとも係合部６ａ，６ｂを係合させた部分がカバー体２０の裏面から離隔する方向に付勢される。従って、弾性突出部６０ａ，各弾性突出片６０ｂの付勢力により、各係合突出片５ａ，５ｂがカバー体２０内に向けて強く引込まれ、装飾部材１がカバー体２０に強く引きつけられた状態で当該カバー体２０に取付けられ、装飾部材１の取付状態も安定する。
【００７２】
また、例えば従来技術において説明した特開平１０−３５３８９号公報に開示のものでは、装飾部材をカバー体に向けて押え込みつつ回転させているので、当該装飾部材は回転可能な円形状であり、しかも、装飾部材とカバー体との係合部分は装飾部材の外周部に限られる構成となっていた。しかしながら、このエアバックカバーでは、装飾部材１をカバー体２０に仮取付した後はそれを移動させることなくバックプレート５０をカバー体２０の裏面側で挿通位置から係合位置に移動させることで、装飾部材１の取付がなされる。従って、装飾部材１を回転可能な形状にする必要がなくその形状設計の自由度に優れる上、係合部６ａ，６ｂ及び弾性突出部６０ａ，弾性突出片６０ｂの設置位置についても装飾部材１の外周部に限られることがないためその設置位置の自由度にも優れる。
【００７３】
また、第１凹部３１ａ，３１ｂと第２凹部３０ａ，３０ｂとの間に形成された突条部３２ａ，３２ｂにより、第２凹部３０ａ，３０ｂに配設された弾性突出片６０ｂ又は弾性突出部６０ａが第１凹部３１ａ，３１ｂ側に移動するのを規制されるため、バックプレート５０が係合位置に移動した取付状態を維持することができる。
【００７４】
さらに、弾性突出片６０ｂ又は弾性突出部６０ａのうちの第２凹部３０ａ，３０ｂ側の部分に、その第２凹部３０ａ，３０ｂに向けてカバー体２０の裏面から離隔する方向に傾斜するガイド傾斜部６１ａ，６１ｂが形成されているため、バックプレートを挿通位置から係合位置に移動させると、ガイド傾斜部６１ａ，６１ｂが突条部３２ａ，３２ｂに摺接して弾性突出片６０ｂ又は弾性突出部６０ａがバックプレート５０の裏面から離隔する方向に持上げられる。従って、バックプレート５０を挿通位置から係合位置に移動させる際に、弾性突出片６０ｂ又は弾性突出部６０ａが突条部３２ａ，３２ｂを容易に乗越えることができ、本エアバッグカバーの組立性に優れる。
【００７５】
なお、本実施の形態では、バックプレート５０側の弾性付勢部（弾性突出片６０ｂ，弾性突出部６０ａ）をカバー体２０の裏面に向けて突出する形状としているが、図１９及び図２０に示す変形例のように、カバー体２０Ｃ（カバー体２０に相当）の裏面側に、凸状の付勢部当接部３０Ｃを形成すると共に、バックプレート５０Ｃ（バックプレート５０に相当）側に係合位置で前記付勢部当接部３０Ｃに当接可能な弾性付勢部６０Ｃを形成してもよい。
【００７６】
即ち、カバー体２０Ｃの裏面側にバックプレート５０Ｃに向けて突出する付勢部当接部３０Ｃが形成される。一方、バックプレート５０Ｃ側には、それが挿通位置から係合位置に向けて移動する際の前記付勢部当接部３０Ｃの弧状軌跡に沿って弧状スリット６１Ｃが形成されると共に、そのスリット６１Ｃの一端部から他端部に向けてスリット６１Ｃの半ば程度に至る弾性当接片６２Ｃが形成される。
【００７７】
そして、バックプレート５０Ｃを挿通位置に配設した状態では、付勢部当接部３０Ｃがスリット６１Ｃの他端側の孔部内に配設され、当該弾性当接片６２Ｃの付勢力がバックプレート５０Ｃに作用しない状態となってる（図２０（ｂ）参照）。この状態から、バックプレート５０Ｃを挿通位置から係合位置に移動させると、弾性当接片６２Ｃが付勢部当接部３０Ｃに乗上げるようにして当該付勢部当接部３０Ｃに当接する（図１９及び図２０（ａ）参照）。かかる構成によっても、弾性当接片６２Ｃの付勢力により、バックプレート５０Ｃがカバー体２０Ｃの裏面から離隔する方向に付勢されることになる。
【００７８】
また、本実施の形態では、バックプレート５０を回転させて挿通位置から係合位置に移動させているが、必ずしもその必要はない。例えば、バックプレート５０を直線状に移動させて挿通位置から係合位置に移動させる構成であってもよい。
【００７９】
もっとも、本実施の形態では、バックプレート５０が係合軸部１５を軸係合孔部６５に挿通させた状態でその係合軸部１５周りに回転して、挿通位置から係合位置に向けて移動するため、バックプレート５０を係合軸部１５周りに中心ずれすることなく正確に挿通位置から係合位置に向けて移動させることができる。しかも、係合位置では、係合軸部１５の抜止係合突部１６を軸係合孔部６５に抜止め状に係合させているため、装飾部材１の中央部分もカバー体２０に向けて引込み保持することができる。
【００８０】
また、各弾性付勢部（弾性突出部６０ａ，弾性突出片６０ｂ）が、バックプレート５０の回転軸周りにその回転軸を中心に実質的に等角度間隔で対応する各付勢部当接部（第２凹部３０ａ，３０ｂ）に当接しているため、バックプレート５０を装飾部材１の裏面から離隔する方向に付勢する力を、バックプレート５０の局所に集中させることなく、その全体に亘って分散させることができる。従って、各係合突出片５ａ，５ｂも可及的に均等な力でカバー体２０の裏面側に引込まれることになり、装飾部材１の取付状態がより安定し、また、熱変形などによる局部的な変形を防止できる。
【００８１】
【発明の効果】
以上のように、この発明の請求項１記載のエアバッグカバーによると、バックプレートを挿通位置に配設した状態で、装飾部材の係合突出片を挿通孔部に挿通させ、この後、バックプレートを挿通位置から係合位置に移動させると、バックプレート側の弾性付勢部がカバー体の裏面側に形成された付勢部当接部に当接して、バックプレートのうち少なくとも前記係合部の係合部分がカバー体の裏面から離隔する方向に付勢され、係合部が被係合部に抜止め状に係合して装飾部材がカバー体に取付けられる。従って、バックプレートを挿通位置から係合位置に移動させることで、装飾部材に押込み方向の強い力を特別に加えることなく、当該装飾部材をカバー体に取付けることができる。
【００８２】
また、装飾部材をカバー体に取付けた状態では、弾性付勢部の付勢力により、被係合部に抜止め状に係合した係合突出片もカバー体内に向けて強く引込まれて、装飾部材もカバー体に強く引きつけられ、装飾部材の取付状態が安定する。
【００８３】
また、請求項２記載のエアバッグカバーによると、被係合突出片の先端部に段部を介してカバー体の裏面に向けて突出する弾性突出片が形成され、この弾性突出片がカバー体側の第２凹部に当接するため、装飾部材側の係合突出片が係合する被係合突出片を効果的にカバー体の裏面から離隔する方向に付勢することができる。
【００８４】
さらに、請求項３記載のエアバッグカバーでは、被係合部から離れた位置で前記カバー体の裏面に向けて突出する弾性突出部が形成され、この弾性突出部がカバー体側の第２凹部に当接するため、バックプレートのうち比較的広範囲な部分をカバー体の裏面から離隔する方向に付勢することができる。
【００８５】
また、請求項４記載のエアバッグカバーによると、第１凹部と第２凹部との間に形成された突条部により、第２凹部に配設された弾性突出片又は弾性突出部が前記第１凹部側に移動するのを規制されるため、バックプレートが係合位置に移動して弾性付勢部又は弾性突出部が付勢部当接部に当接した状態、即ち、装飾部材をカバー体に引きつけて取付けた状態を維持することができる。
【００８６】
また、請求項５記載のエアバッグカバーによると、前記弾性突出片又は前記弾性突出部のうちの前記第２凹部側の部分に、その第２凹部に向けて前記カバー体の裏面から離隔する方向に傾斜するガイド傾斜部が形成されているため、バックプレートを挿通位置から係合位置に移動させると、ガイド傾斜部が突条部に摺接して弾性突出片又は弾性突出部がバックプレートの裏面から離隔する方向に持上げられる。従って、バックプレートを挿通位置から係合位置に移動させる際に、弾性突出片又は弾性突出部が突条部を容易に乗越えることができる。
【００８７】
さらに、請求項６記載のエアバッグカバーによると、バックプレートが係合軸部を軸係合孔部に挿通させた状態でその係合軸部周りに回転して、挿通位置から係合位置に向けて移動するため、バックプレートを中心ずれさせることなく正確に挿通位置から係合位置に向けて移動させることができる。また、係合位置では、係合軸部の抜止係合突部を軸係合孔部に抜止め状に係合させる構成を利用して、装飾部材を保持することができる。
【００８８】
また、請求項７記載のエアバッグカバーによると、各弾性付勢部はバックプレートが回転軸周りでその回転軸に対して実質的に等角度の位置で対応する各付勢部当接部に当接するため、バックプレートを装飾取付部の裏面から離隔する方向に付勢する力を、バックプレートの局所に集中させることなく、その全体に亘って分散させることができる。従って、各係合突出片が可及的に均等な力でカバー体の裏面側に引込まれることになり、装飾部材の取付状態がより安定する。
【図面の簡単な説明】
【図１】この発明の実施の形態に係るエアバッグカバーに係るカバー体を示す正面図である。
【図２】同上のカバー体の背面図である。
【図３】図１のＩＩＩ−ＩＩＩ線断面図である。
【図４】図３の要部拡大断面図である。
【図５】装飾部材を示す正面図である。
【図６】装飾部材を示す背面図である。
【図７】装飾部材を示す平面図である。
【図８】装飾部材を示す側面図である。
【図９】図８のＩＸ−ＩＸ線断面図である。
【図１０】図６のＸ−Ｘ線断面図である。
【図１１】図６のＸＩ−ＸＩ線断面図である。
【図１２】バックプレートが挿通位置に配設された状態を示す図である。
【図１３】バックプレートが係合位置に配設された状態を示す図である。
【図１４】バックプレートを示す背面図である。
【図１５】図１４のＸＶ−ＸＶ線断面図である。
【図１６】図１４のＸＶＩ−ＸＶＩ線断面図である。
【図１７】図１２のＸＶＩＩ−ＸＶＩＩ線において弾性突出部が第１凹部から第２凹部に移動した状態を示す図である。
【図１８】図１２のＸＶＩＩＩ−ＸＶＩＩＩ線において弾性突出片が第１凹部から第２凹部に移動した状態を示す図である。
【図１９】変形例に係るカバー体及びバックプレートを示す要部拡大図である。
【図２０】図２０（ａ）は図１９のＸＸ−ＸＸ線断面図であり、図２０（ｂ）は同断面図においてバックプレートが挿通位置に配設された状態を示す図である。
【符号の説明】
１装飾部材
２装飾本体部
５ａ，５ｂ係合突出片
６ａ，６ｂ係合部
１５係合軸部
１６抜止係合突部
２０カバー体
２１装飾取付部
２５ａ，２５ｂ貫通孔
３０ａ，３０ｂ第２凹部（付勢部当接部）
３１ａ，３１ｂ第１凹部
３２ａ，３２ｂ突条部
３５貫通軸孔
５０バックプレート
５５ａ，５５ｂ挿通孔部
５６ａ，５６ｂ被係合部
５７ｂ被係合突出片
６０ａ弾性突出部（弾性付勢部）
６０ｂ弾性突出片（弾性付勢部）
６１ａ，６１ｂガイド傾斜部
６２ｂ段部
６５軸係合孔部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an airbag cover provided with a decorative member.
[0002]
[Prior art]
A steering wheel of an automobile incorporates an airbag device including an inflator that can inject gas, an airbag that can be inflated and deployed by the injection gas from the inflator, and a cover body that covers the airbag.
[0003]
The air bag is normally stored inside the cover body in a folded form. In an emergency such as a collision, the airbag is inflated by gas injected from an inflator and is operated by opening the cover body. It is configured to expand and deploy in front of the person.
[0004]
Incidentally, a decorative member formed separately from the cover body may be attached to the outer surface of the cover body for the purpose of enhancing the decorative effect.
[0005]
Conventionally, as a configuration for attaching a decorative member to a cover body, there are those disclosed in Japanese Patent Laid-Open Nos. 9-11833 and 10-119683.
[0006]
In these publications, basically, a shaft projecting from a decorative member is penetrated through the cover body, and the decorative member is strongly pressed toward the cover body, and the shaft projecting to the back side of the cover body. A configuration of a type in which a tip end portion is engaged with an engagement hole formed in a back plate and held out is disclosed.
[0007]
Japanese Patent Laid-Open No. 10-35389 discloses another type of structure for attaching a decorative member to a cover body.
[0008]
In the one disclosed in this publication, a plurality of engaging portions are intermittently formed along the circumferential direction of the outer peripheral portion of the substantially disc-shaped decorative member, while the decorative member can be inserted into the cover body. A hole-shaped insertion portion is formed, and a plurality of inclined ribs that can be locked to the locking portions are intermittently formed around the insertion portion. Then, the decorative member is inserted into the insertion portion so that the locking portions are positioned on the back side of the cover body through the inclined ribs, and the decorative member is rotated while being pressed toward the cover body. Thus, each locking portion is engaged with each inclined rib.
[0009]
[Problems to be solved by the invention]
However, in the types disclosed in Japanese Patent Application Laid-Open Nos. 9-11833 and 10-119683, the decorative member is attached to the cover body when the front end of the shaft is engaged with the engagement hole formed in the back plate. Therefore, the decorative member must be pressed down strongly, and the decorative member may be damaged or broken. In addition, since the tip end portion of the shaft portion formed on the decoration member is merely engaged with the engagement hole formed on the back plate and retained, the force for attracting the decoration member to the cover body is not sufficient. It was sufficient and the mounting state of the decorative member was unstable.
[0010]
Further, in the one disclosed in Japanese Patent Laid-Open No. 10-35389, when engaging each locking portion with each inclined rib, it is necessary to rotate the decorative member while pressing it toward the cover body. There was a risk of damage.
[0011]
Then, the subject of this invention is providing the airbag cover which can attach the said decoration member to a cover body, without applying strong force to a decoration member, and can stabilize the attachment state of the decoration member. is there.
[0012]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the airbag cover according to claim 1 is provided with a decorative member formed with an protruding protrusion having an engaging portion on the back surface thereof, and a through-hole capable of penetrating the engaging protruding piece. An insertion hole portion through which the engagement portion of the engagement protrusion piece of the decorative portion protruding from the formed cover body and the back surface side of the cover body can be inserted is formed continuously with the insertion hole portion. A back plate formed with an engaged portion that is engageable in a retaining shape, and an elastic biasing portion is provided on the back plate side, and the back surface side of the cover body has the An urging portion abutting portion with which an elastic urging portion abuts is provided, and the back plate is inserted from a penetrating position through which the engagement protruding piece penetrating the through hole is inserted into the insertion hole portion of the back plate. Engage the engagement protrusion with the engaged portion of the back plate The elastic urging portion of the back plate is brought into contact with the urging portion abutting portion of the cover body, and the portion engaged with the engaging portion is moved to the cover body. It is energized in the direction away from the back surface of.
[0013]
According to a second aspect of the present invention, the engaged portion includes an engaged protruding piece that is cantilevered so as to extend toward the insertion hole portion, and the elastic biasing portion is used as the elastic biasing portion. An elastic protruding piece protruding from the tip of the engaging protruding piece toward the back surface of the cover body through a stepped portion is formed, and the back plate of the back plate disposed at the insertion position is formed on the back surface side of the cover body. A first recess having a depth larger than the projecting dimension of the elastic projecting piece is formed in a portion corresponding to the elastic projecting piece, and the biasing part abutting part is provided adjacent to the first recess. A second recess having a depth smaller than the protruding dimension of the elastic protruding piece may be formed in a portion corresponding to the elastic protruding piece of the back plate disposed at the engagement position.
[0014]
According to a third aspect of the present invention, as the elastic urging portion, an elastic protrusion that protrudes toward the back surface of the cover body at a position away from the engaged portion is formed, and the back surface side of the cover body In addition, a first recess having a depth larger than the protruding dimension of the elastic protruding portion is formed in a portion corresponding to the elastic protruding portion of the back plate disposed at the insertion position, and the biasing portion As a contact portion, a second portion having a depth dimension smaller than the projecting dimension of the elastic projecting portion is provided at a portion corresponding to the elastic projecting portion of the back plate provided adjacent to the first recess and disposed at the engaging position. A recess may be formed.
[0015]
Here, as described in claim 4, a protrusion may be formed between the first recess and the second recess.
[0016]
In this case, as described in claim 5, of the elastic protruding piece or the elastic protruding portion, the elastic protruding piece or the elastic protruding portion is disposed on the second concave portion side in a state where the elastic protruding piece is disposed in the first concave portion. A guide inclined portion that is inclined in a direction away from the back surface of the cover body toward the second recess may be formed in the portion.
[0017]
Furthermore, as described in claim 6, an engagement shaft portion is formed to protrude from the decorative member, and the engagement shaft portion protrudes to the back surface side of the cover body through a through shaft hole formed in the cover body. The back plate has a shaft engagement hole portion through which the engagement shaft portion can be inserted, and the back plate has the engagement shaft portion inserted through the shaft engagement hole portion. Thus, by rotating around the engagement shaft portion, the engagement shaft portion can be moved from the insertion position toward the engagement position, and a retaining engagement protrusion is formed at the distal end portion of the engagement shaft portion. The shaft engaging hole is formed in a shape that allows the retaining engagement protrusion of the engagement shaft to be inserted at the insertion position and that the retaining engagement protrusion can be engaged in the retaining position at the engagement position. May be.
[0018]
Further, when the back plate is moved around the predetermined rotation axis on the back surface side of the cover body to move from the insertion position toward the engagement position, the back plate according to claim 7. As described above, the elastic urging portions and the urging portion contact portions corresponding to the elastic urging portions are provided in plural, and the elastic urging portions are positioned substantially equiangularly around the rotation axis with respect to the rotation axis. It is good to make it contact | abut to each said urging | biasing part contact part corresponding to.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an airbag cover according to an embodiment of the present invention will be described.
[0020]
As shown in FIGS. 1 to 3, the airbag cover includes a decorative member 1, a cover body 20, and a back plate 50.
[0021]
The decorative member 1 is formed of resin or the like. As shown in FIGS. 5 to 11, engagement protrusions 5 a and 5 b having engagement portions 6 a and 6 b protrude on the back side of the decoration main body 2. Formed.
[0022]
The decoration main body 2 is attached to the front side of the cover body 20, and is formed into a shape that takes the shape of a car emblem, logo, character representing a car name, etc., and plays a role of enhancing the decorative effect. . In the present embodiment, a substantially Y-shaped inner decoration portion 4 is formed inside a substantially oval frame body portion 3 that is long in the horizontal direction.
[0023]
Two types of engaging projecting pieces 5a and 5b, which will be described below, are formed on the decorative body 2 so as to project.
[0024]
The engagement protruding piece 5a is formed to protrude from the upper surface of the decorative main body 2 and the back surfaces of both lower side portions, and has a protruding engagement portion 6a formed at the tip. More specifically, each engagement protruding piece 5a is formed in a plate-like member that is curved along a virtual arc line centering on an engagement shaft portion 15 to be described later, and the decoration main body portion is formed at the tip edge portion thereof. 2 is formed into a shape in which a projecting engaging portion 6a protruding outward is formed, and is configured to be engageable with an engaged portion 56a described later (see FIG. 13). In addition, each engaging part 6a is formed in the shape which becomes thin gradually toward the front-end | tip direction so that it may be easy to insert in the through-holes 25a and 25b mentioned later and the insertion hole parts 55a and 55b.
[0025]
The engagement protrusions 5b are formed to protrude from the back surfaces of the upper side parts of the decorative body part 2 (the part where the inner decoration part 4 faces obliquely upward is connected to the frame body part 3). The engaging portion 6b is formed to protrude. More specifically, each of the engagement protrusions 5b is supported by the engagement portions 6b between the tip portions of the support pieces 7b formed to protrude along the line extending from the engagement shaft portion 15 at a predetermined interval. It is formed in a substantially U-shape. And it is comprised so that the to-be-engaged protrusion piece 57b mentioned later can be inserted in the hole in the engagement protrusion piece 5b, and can be engaged with the engaging part 6b (refer FIG. 13).
[0026]
The cover body 20 is formed of resin or the like, and has a bowl-like overall shape as shown in FIGS. 1 to 3 and can be attached to cover the boss portion of a steering wheel (not shown). Formed. Then, an unillustrated airbag is incorporated inside the back side thereof, and when the airbag is inflated by gas ejected from an inflator not illustrated in the event of a collision or the like, the airbag is inflated. Under the force, the cover body 20 is broken along a predetermined tear line L so that the airbag can be inflated and deployed forward of the driver.
[0027]
As shown in FIGS. 1 to 4, 12, and 13, the cover body 20 is formed with through holes 25 a and 25 b that can penetrate the engagement protruding pieces 5 a and 5 b.
[0028]
That is, a substantially flat decorative attachment portion 21 is formed at a substantially central portion of the front surface portion of the cover body 20, and a concave portion 23 corresponding to the shape of the decorative main body portion 2 is formed on the front surface portion of the decorative attachment portion 21. Is formed. And it is comprised so that the said decoration main-body part 2 can be arrange | positioned with the predetermined attitude | position in the front side of the decoration attachment part 21 so that it may fit in the recessed part 23. FIG.
[0029]
Through holes 25a and 25b are formed in the decorative mounting portion 21 at positions corresponding to the engaging protruding pieces 5a and 5b in a state where the decorative member 1 is mounted as described above. When the ornamental main body 2 is disposed on the front surface side of the ornament attachment portion 21 so that the engagement projection pieces 5a and 5b are inserted into the through holes 25a and 25b, the tips of the engagement projection pieces 5a and 5b are disposed. It will be in the state which the part protruded to the back surface side of the decoration attachment part 21. FIG.
[0030]
A substantially annular guide protrusion 21a is formed on the back surface side of the decorative attachment portion 21, and the back plate 50 rotates within the guide protrusion 21a.
[0031]
As shown in FIGS. 2 to 4 and 12 to 14, the back plate 50 has a function of attaching and holding the decorative member 1 to the cover body 20 on the back side of the cover body 20.
[0032]
That is, the back plate 50 is disposed so as to be movable from a predetermined insertion position shown in FIG. 12 to a predetermined engagement position shown in FIG. 13 while being in surface contact with the back surface of the cover body 20. In the present embodiment, the back plate 50 is a member formed in a disk shape from a metal material, and from the predetermined insertion position (see FIG. 12) to the predetermined engagement position (see FIG. 13) on the back surface of the cover body 20. ) (In the clockwise direction in FIG. 12).
[0033]
The back plate 50 has a pair of rotational movement holes 59 sandwiching the rotational center thereof, and a protrusion formed on a predetermined jig is inserted into the rotational movement hole 59. By rotating the jig in this state, the back plate 50 can be easily rotated and moved.
[0034]
The back plate 50 is formed with insertion holes 55a and 55b through which the engagement projecting pieces 5a and 5b projecting to the back side of the cover body 20 at the insertion position can be inserted, and at the engagement position the engagement portion Engaged portions 56a and 56b that can engage 6a and 6b in a retaining shape are formed.
[0035]
As the insertion hole portions 55a and 55b and the engaged portions 56a and 56b, there are two types corresponding to the engagement protruding pieces 5a and 5b.
[0036]
First, a plurality of sets (three sets in this case) of insertion hole portions 55a and engaged portions 56a are formed as corresponding to the respective engaging protruding pieces 5a. Each insertion hole 55a is formed in a slit shape through which the engagement portion 6a of each engagement protrusion 5a can be inserted in a state where the back plate 50 is disposed at the insertion position. Each engaged portion 56a is formed in a shape capable of engaging the engaging portion 6a of each engaging protruding piece 5a in a retaining shape, that is, in a slit shape narrower than the insertion hole portion 55a. Yes. Each insertion hole 55a and each engaged portion 56a are continuously provided so as to extend along a virtual circumferential direction centering on the rotation center of the back plate 50.
[0037]
Then, in a state where the back plate 50 is disposed at the insertion position on the back surface of the cover body 20, the distal end portion of each engagement protruding piece 5 a protruding to the back surface side of the cover body 20 is inserted into the corresponding insertion hole portion 55 a. Thus, each engaging portion 6a is disposed to protrude from the back surface side of the back plate 50 (see FIG. 12). In this state, when the back plate 50 is rotationally moved from the insertion position toward the engagement position, the distal end portion of each engagement protrusion piece 5a enters the corresponding engaged portion 56a, and each engagement portion 6a is It will be engaged with each engaged part 56a in a retaining manner (see FIG. 13).
[0038]
In addition, a plurality of sets (here, two sets) of insertion hole portions 55b and engaged portions 56b are formed corresponding to the respective engagement protruding pieces 5b. Each insertion hole 55b is formed in a hole shape through which the engagement portion 6b of each engagement protrusion 5b can be inserted in a state where the back plate 50 is disposed at the insertion position. Each engaged portion 56b is cantilevered with a band-like engaged protruding piece 57b in a posture extending toward the insertion hole 55b in a hole 58b through which each engagement protruding piece 5b can be inserted. The composition Each of the insertion hole portions 55b and the engaged portion 56b are continuously provided along a virtual circumferential direction centering on the rotation center of the back plate 50.
[0039]
Then, in a state where the back plate 50 is disposed at the insertion position on the back surface of the cover body 20, the distal end portion of each engagement protruding piece 5 b protruding to the back surface side of the cover body 20 is inserted into the corresponding insertion hole portion 55 b. Each engagement portion 6b is arranged to protrude from the back surface side of the back plate 50 (see FIG. 12). In this state, when the back plate 50 is rotationally moved from the insertion position toward the engagement position, each engaged projection piece 57b is inserted into each engagement projection piece 5b, and each engagement portion 6b at the tip portion thereof. Will be engaged in a retaining shape (see FIG. 13).
[0040]
Due to the engagement structure of the engagement protruding pieces 5a, 5b and the engaged portions 56a, 56b, the back plate 50 is held so as not to be separated from the decorative member 1 by a predetermined distance or more.
[0041]
In addition, second concave portions 30a and 30b are formed as biasing portion abutting portions on the back surface side of the cover body 20, and an elastic biasing portion that abuts on the second concave portion 30a at the engagement position on the back plate 50 side. As a result, an elastic protruding piece 60b is formed as an elastic urging portion that contacts the elastic protruding portion 60a and the second recess 30b.
[0042]
Among these, the 2nd recessed part 30a is provided in the lower part of the cover body 20 (decorative attachment part 21), and the elastic protrusion part 60a is provided in the lower part of the backplate 50. FIG.
[0043]
As shown in FIGS. 12 to 15, the elastic protruding portion 60 a protrudes toward the back surface of the cover body 20 at a position away from the engaged portions 56 a and 56 b. A configuration in which a portion slightly inward from the lower portion of the plate 50 is cut out in a strip shape along the outer peripheral direction of the back plate 50 while leaving both ends thereof, and the cut out portion is bent so as to protrude toward the surface side of the back plate 50 It is said.
[0044]
Further, as shown in FIGS. 12, 13 and 17, on the back surface of the cover body 20, on the arcuate rotation locus of the elastic protrusion 60a when the back plate 50 rotates from the insertion position to the engagement position, A first recess 31a and a second recess 30a are formed.
[0045]
The 1st recessed part 31a is formed in the back surface of the decoration attachment part 21 of the cover body 20, and the position corresponding to the elastic protrusion part 60a of the backplate 50 arrange | positioned in the said insertion position, The depth dimension Is set larger than the projecting dimension of the elastic projecting portion 60a. In addition, the second recess 30a is the back surface of the decorative attachment portion 21 of the cover body 20, and is located on the first recess 31a at a position corresponding to the elastic protrusion 60a of the back plate 50 disposed at the engagement position. The depth dimension is set smaller than the protrusion dimension of the elastic protrusion 60a. In addition, the depth dimension of the 1st recessed part 31a and the 2nd recessed part 30a, and the protruding dimension of the elastic protrusion part 60a are based on the contact surface of the back plate 50 and the back surface of the decoration mounting part 21 (the 1st recessed part 31b mentioned later). The same applies to the depth dimension of the second recess 30b and the protruding dimension of the elastic protruding piece 60b).
[0046]
In a state where the back plate 50 is disposed at the insertion position on the back side of the decorative mounting portion 21, the elastic protrusion 60a is accommodated in the first recess 31a without contacting the bottom surface (2 in FIGS. 12 and 17). On the other hand, in a state where the back plate 50 is rotated from the insertion position to the engagement position on the back surface side of the decorative mounting portion 21, the elastic protrusion 60a is elastically contacted with the bottom surface in the second recess 30a. (See the solid lines in FIGS. 13 and 17). Due to the elastic force of the elastic protrusion 60a, the lower half portion (including each engaged portion 56a) of the back plate 50 is mainly biased in a direction away from the back surface of the cover body 20.
[0047]
In this case, since the elastic protrusion 60a is provided at a position away from the engaged portion 56a and the like, a relatively wide portion of the back plate 50 (in this embodiment, the two engaged portions 56a and the like are arranged). Can be biased in a direction away from the back surface of the cover body 20.
[0048]
A protrusion 32a is formed along the boundary line between the first recess 31a and the second recess 30a, and the elastic protrusion 60a accommodated in the second recess 30a is formed by the protrusion 32a. The movement toward the concave portion 31a is restricted.
[0049]
Moreover, the back surface side of the cover body 20 toward the 2nd recessed part 30a side in the part by the side of the 2nd recessed part 30a in the state by which the said elastic protruding part 60a was arrange | positioned in the 1st recessed part 31a among the elastic protruding parts 60a A guide inclined portion 61a that is inclined in a direction away from the center is formed, and a portion on the opposite side is bent at a substantially right angle. When the back plate 50 is rotationally moved from the insertion position to the engagement position, the elastic sloping portion 60a is lifted by sliding the guide inclined portion 61a against the protruding portion 32a, and the elastic projecting portion 60a projects. The strip 32a can be easily climbed over. Further, in a state where the elastic protrusion 60a is accommodated in the second recess 30a, a substantially right-angled bent portion of the elastic protrusion 60a abuts on the protrusion 32a so that the elastic protrusion 60a is difficult to get over the protrusion 32a. It has become.
[0050]
The second recesses 30 b are provided on both upper side portions of the cover body 20 (decorative attachment portion 21), and the elastic protruding pieces 60 b are provided on both upper side portions of the back plate 50.
[0051]
As shown in FIGS. 12 to 14 and 16, each elastic protruding piece 60b protrudes from the tip end portion of each engaged protruding piece 57b toward the back surface of the cover body 20 via the stepped portion 62b. Formed.
[0052]
Further, as shown in FIGS. 12, 13, and 18, on the back surface of the cover body 20, on the arcuate rotation trajectory of each elastic protruding piece 60b when the back plate 50 rotates from the insertion position to the engagement position. The first recess 31b and the second recess 30b are formed respectively.
[0053]
The 1st recessed part 31b is formed in the position corresponding to the elastic protrusion piece 60b of the backplate 50 arrange | positioned at the decoration position on the back surface of the decoration attachment part 21 of the cover body 20, The depth dimension is It is set larger than the protruding dimension of the elastic protruding piece 60b. The second recess 30b is adjacent to the first recess 31b at a position corresponding to the elastic protruding piece 60b of the back plate 50 disposed at the engagement position on the back surface of the decorative mounting portion 21 of the cover body 20. The depth dimension is set smaller than the protrusion dimension of the elastic protrusion piece 60b.
[0054]
And in the state which has arrange | positioned the backplate 50 in the insertion position of the back surface of a decoration attachment part, the elastic protrusion piece 60b is accommodated and arrange | positioned without contacting the bottom face in the 1st recessed part 31b (FIG. 12, FIG. 18). On the other hand, when the back plate 50 is rotated from the insertion position to the engagement position on the back surface of the decorative mounting portion 21, the elastic protruding piece 60b is elastically contacted with the bottom surface in the second recess 30b. (See solid lines in FIGS. 13 and 18). Due to the elastic force of each elastic protruding piece 60b, the portion of the back plate 50 where the engaged portion 56b is formed is urged toward the direction away from the back surface of the cover body 20.
[0055]
In this case, since the elastic protruding piece 60b is provided at the tip of the engaged protruding piece 57b, the engaged protruding piece 57b engaged with the engaging protruding piece 5b on the decorative member 1 side is effectively covered with the cover body. It can urge in the direction away from the back surface of 20.
[0056]
A protrusion 32b is also formed along the boundary line between the first recess 31b and the second recess 30b, and the elastic protrusion piece 60b accommodated in the second recess 30b is formed by the protrusion 32b. The movement toward the one recess 31b is restricted.
[0057]
Moreover, the back surface side of the cover body 20 toward the 2nd recessed part 30b side in the part by the side of the 2nd recessed part 30b in the state by which the said elastic protruding piece 60b was arrange | positioned in the 1st recessed part 31b among the elastic protruding pieces 60b A guide inclined portion 61b that is inclined in a direction away from the guide is formed, and a portion on the opposite side is formed in a stepped portion 62b that is bent substantially at a right angle. When the back plate 50 is rotationally moved from the insertion position to the engagement position, the elastic sloping piece 60b is lifted by bringing the guide sloping portion 61b into sliding contact with the ridge portion 32b and lifting the whole elastic protruding piece 60b. Can easily get over the ridge 32b. On the other hand, in a state where the elastic protruding piece 60b is accommodated in the second recess 30b, the stepped portion 62b contacts the protruding portion 32b, so that the elastic protruding piece 60b is difficult to get over the protruding portion 32b.
[0058]
Further, in the present embodiment, a plurality of elastic urging portions (elastic protrusions 60a and elastic protrusions 60b) and corresponding urging portion contact portions (second recesses 30a and 30b) are provided. The elastic urging portions (the elastic protrusions 60a and the elastic protrusions 60b) correspond to the urging portion contact portions (second concave portions) corresponding to the rotation axes of the back plate 50 at substantially equal angles with respect to the rotation axes. 30a, 30b).
[0059]
More specifically, the elastic protrusions 60 a abut against the corresponding second recesses 30 a at the lower part of the back plate 50 (decorative attachment part 21), and the elastic protrusions 60 b correspond to the second side parts on the upper side of the back plate 50. 2 abuts against the recess 30b. Therefore, each elastic urging portion (elastic protrusion 60a, elastic protrusion 60b) has a corresponding urging portion abutting portion (second protrusion) around the rotation axis of the back plate 50 at an interval of 120 degrees around the rotation axis. It contacts the recesses 30a, 30b). As a result, the back plate 50 is urged in the direction away from the back surface of the decorative mounting portion 21 with as uniform force as possible around the outer periphery thereof.
[0060]
Also, as shown in FIGS. 4, 6, and 8 to 10, the engagement shaft portion 15 is provided at a substantially central portion on the back surface of the decorative body portion 2 of the decorative member 1 (a position corresponding to the rotation center of the back plate 50). 1 to 4, 12, and 13, the engagement is made at a substantially central portion (a position corresponding to the rotation center of the back plate 50) of the decorative attachment portion 21 of the cover body 20. A through-shaft hole 35 that can penetrate the shaft portion 15 is formed. Then, with the decorative member 1 attached to the cover body 20, the engagement shaft portion 15 penetrates the through-shaft hole 35, and the distal end portion of the engagement shaft portion 15 protrudes to the back side of the decoration attachment portion 21. .
[0061]
As shown in FIGS. 12 to 14, a shaft engaging hole 65 is formed at the center of rotation of the back plate 50, and the tip of the engaging shaft 15 is connected to the shaft engaging hole 65. It is inserted. The back plate 50 is disposed on the back surface side of the decorative attachment portion 21 with the tip end portion of the engagement shaft portion 15 inserted through the shaft engagement hole portion 65. Accordingly, the back plate 50 is configured to accurately rotate and move from the insertion position toward the engagement position around the engagement shaft portion 15.
[0062]
Further, the retaining engagement protrusion 16 is formed at the tip of the engagement shaft portion 15, and the shaft engagement hole 65 has the retaining engagement protrusion 16 in a state where the back plate 50 is disposed at the insertion position. Is formed in a shape that allows the retaining engagement projection 16 to be engaged in a retaining shape in a state where it is inserted in the engaging position.
[0063]
In the present embodiment, the retaining engagement protrusion 16 is formed in a water droplet shape when viewed from the back surface side, and the shaft engagement hole 65 has a water droplet shape corresponding to the retaining engagement protrusion 16 and is back. The plate 50 is formed in a shape capable of being inserted through the retaining engagement protrusion 16 with the plate 50 disposed at the insertion position.
[0064]
The back plate 50 is then temporarily attached to the decorative attachment portion 21 and the back plate 50 is projected to the back side of the decorative attachment portion 21 through the engagement shaft portion 15 through the through-shaft hole 35. If it is disposed at the insertion position on the back surface side, the front end portion of the engagement shaft portion 15 is inserted into the shaft engagement hole portion 65, and the retaining engagement projection portion 16 is disposed so as to protrude from the back surface side of the back plate 50. Thereafter, when the back plate 50 is rotationally moved from the insertion position toward the engagement position, the retaining engagement protrusion 16 is engaged with the shaft engaging hole 65 in a retaining manner. Due to the engagement structure between the retaining engagement protrusion 16 and the shaft engagement hole 65, the central portion of the decorative member 1 is also drawn into and held in the cover body 20.
[0065]
An assembly procedure of the airbag cover configured as described above will be described.
[0066]
First, the decorative members 1 are inserted into the corresponding through holes 25a, 25b and the through shaft holes 35 from the front side of the cover body 20, so that the decorative members 1 1 is temporarily attached to the cover body 20. In this state, the engagement projecting pieces 5 a and 5 b and the distal end portion of the engagement shaft portion 15 project from the back surface side of the decorative attachment portion 21 of the cover body 20.
[0067]
Next, the back plate 50 is disposed so as to contact the back surface of the decorative mounting portion 21. At this time, the back plate 50 is disposed at the insertion position, and the distal end portions of the engagement protruding pieces 5a and 5b and the engagement shaft portion 15 are moved to the corresponding insertion hole portions 55a and 55b and the shaft engagement hole portion 65, respectively. Insert (see FIG. 12). In this state, the elastic protrusion 60a and the elastic protrusions 60b are accommodated in a non-contact state with the first recesses 31a and 31b, and the urging force of the elastic protrusion 60a and the elastic protrusions 60b acts on the back plate 50. Not.
[0068]
The decorative member 1 may be temporarily attached to the cover body 20 with the back plate 50 disposed at the insertion position on the back side of the decorative attachment portion 21.
[0069]
Next, the back plate 50 is rotated from the insertion position to the engagement position around the engagement shaft portion 15 (see FIG. 13). Thereby, the engaging portions 6a and 6b of the engaging protruding pieces 5a and 5b are engaged with the engaged portions 56a and 56b in a retaining shape, and the retaining engaging projecting portion 16 of the engaging shaft portion 15 is retained. The shaft engaging hole 65 is engaged in a retaining shape. Further, the elastic protrusion 60 a and the elastic protrusions 60 b are in contact with the bottom surfaces of the corresponding second recesses 30 a and 30 b, and the portion of the back plate 50 where at least the engaging portions 6 a and 6 b are engaged is the cover body 20. It is biased in a direction away from the back surface. Accordingly, the urging force of the elastic protrusions 60a and the elastic protrusions 60b pulls out the engagement protrusions 5a and 5b and the shaft engagement hole 65 that are engaged with the engaged parts 56a and 56b in a retaining manner. The engagement shaft portion 15 engaged in the stop shape is also strongly pulled into the cover body 20, and the decoration member 1 is attached to the cover body 20 in a state where the decoration member 1 is strongly attracted to the cover body 20.
[0070]
According to the airbag cover configured as described above, the engagement protruding pieces 5a and 5b of the decorative member 1 are inserted into the insertion holes 55a and 55b in a state where the back plate 50 is disposed at the insertion position. When the back plate 50 is moved from the insertion position to the engagement position, the engagement portions 6a and 6b are engaged with the engaged portions 56a and 56b in a retaining manner, and the decorative member 1 is attached to the cover body 20. . In this way, the decorative member 1 can be attached to the cover body 20 without applying a strong force in the pushing direction to the decorative member 1 only by moving the back plate 50 from the insertion position to the engaging position.
[0071]
In addition, when the decorative member 1 is attached to the cover body 20, the elastic protrusions 60 a on the back plate 50 side and the elastic protrusion pieces 60 b are the urging portion contact portions formed on the back side of the cover body 20. 2 Abutting against the recesses 30a and 30b, the portion of the back plate 50 where at least the engaging portions 6a and 6b are engaged is biased in a direction away from the back surface of the cover body 20. Accordingly, the engagement projecting pieces 5a and 5b are strongly pulled into the cover body 20 by the urging force of the elastic projecting portions 60a and the respective elastic projecting pieces 60b, and the decorative member 1 is strongly attracted to the cover body 20. Thus, it is attached to the cover body 20, and the attachment state of the decorative member 1 is also stabilized.
[0072]
Further, for example, in the one disclosed in Japanese Patent Application Laid-Open No. 10-35389 described in the prior art, the decorative member is rotated while being pressed toward the cover body, so that the decorative member has a rotatable circular shape, and The engaging portion between the decorative member and the cover body is limited to the outer peripheral portion of the decorative member. However, in this airbag cover, after temporarily attaching the decorative member 1 to the cover body 20, the back plate 50 is moved from the insertion position to the engagement position on the back side of the cover body 20 without moving the decorative member 1. The decorative member 1 is attached. Therefore, it is not necessary to make the decorative member 1 in a rotatable shape and the shape design is excellent, and the engaging portions 6a and 6b, the elastic protruding portions 60a, and the elastic protruding pieces 60b are installed at the positions of the decorative member 1. Since it is not limited to the outer peripheral portion, the degree of freedom of the installation position is excellent.
[0073]
Further, the elastic protrusions 60b or the elastic protrusions 60a disposed in the second recesses 30a and 30b by the protrusions 32a and 32b formed between the first recesses 31a and 31b and the second recesses 30a and 30b. Is restricted from moving toward the first recesses 31a and 31b, so that the attachment state in which the back plate 50 is moved to the engagement position can be maintained.
[0074]
Furthermore, the guide inclined part which inclines in the direction separated from the back surface of the cover body 20 toward the 2nd recessed part 30a, 30b in the part by the side of 2nd recessed part 30a, 30b of the elastic protruding piece 60b or the elastic protruding part 60a. Since 61a and 61b are formed, when the back plate is moved from the insertion position to the engagement position, the guide inclined portions 61a and 61b are slidably contacted with the protrusions 32a and 32b, and the elastic protrusions 60b or the elastic protrusions 60a. Is lifted away from the back surface of the back plate 50. Accordingly, when the back plate 50 is moved from the insertion position to the engagement position, the elastic protruding piece 60b or the elastic protruding portion 60a can easily get over the ridges 32a and 32b, and the assembly of the airbag cover is facilitated. Excellent.
[0075]
In the present embodiment, the elastic urging portion (elastic protruding piece 60b, elastic protruding portion 60a) on the back plate 50 side is formed to protrude toward the back surface of the cover body 20, but in FIGS. As in the modification shown, a convex urging portion abutting portion 30C is formed on the back side of the cover body 20C (corresponding to the cover body 20), and the back plate 50C (corresponding to the back plate 50) is engaged. You may form the elastic urging | biasing part 60C which can contact | abut to the said urging | biasing part contact part 30C in the alignment position.
[0076]
That is, an urging portion contact portion 30C that protrudes toward the back plate 50C is formed on the back surface side of the cover body 20C. On the other hand, on the back plate 50C side, an arcuate slit 61C is formed along the arcuate locus of the urging portion contact portion 30C when it moves from the insertion position toward the engagement position, and the slit 61C An elastic contact piece 62 </ b> C is formed from one end of the slit toward the other end of the slit 61 </ b> C to about the middle of the slit 61 </ b> C.
[0077]
In the state where the back plate 50C is disposed at the insertion position, the urging portion contact portion 30C is disposed in the hole on the other end side of the slit 61C, and the urging force of the elastic contact piece 62C is the back plate 50C. (See FIG. 20B). In this state, when the back plate 50C is moved from the insertion position to the engagement position, the elastic contact piece 62C comes into contact with the urging portion contact portion 30C so as to ride on the urging portion contact portion 30C ( FIG. 19 and FIG. 20 (a)). Also with this configuration, the back plate 50C is biased in the direction away from the back surface of the cover body 20C by the biasing force of the elastic contact piece 62C.
[0078]
In the present embodiment, the back plate 50 is rotated and moved from the insertion position to the engagement position, but this is not always necessary. For example, the back plate 50 may be moved linearly to move from the insertion position to the engagement position.
[0079]
However, in the present embodiment, the back plate 50 rotates around the engagement shaft portion 15 in a state where the engagement shaft portion 15 is inserted through the shaft engagement hole portion 65, and moves from the insertion position toward the engagement position. Therefore, the back plate 50 can be accurately moved from the insertion position toward the engagement position without being shifted from the center around the engagement shaft portion 15. In addition, at the engagement position, the retaining engagement protrusion 16 of the engagement shaft portion 15 is engaged with the shaft engagement hole 65 in a retaining shape, so that the central portion of the decorative member 1 is also directed toward the cover body 20. Can be pulled in and held.
[0080]
Further, the respective biasing portion contact portions corresponding to the respective elastic biasing portions (the elastic projection portions 60a and the elastic projection pieces 60b) at substantially equal angular intervals around the rotation axis of the back plate 50. Since it is in contact with the (second recesses 30a, 30b), the force for urging the back plate 50 in the direction away from the back surface of the decorative member 1 is concentrated on the entire surface of the back plate 50 without being concentrated locally. Can be dispersed. Accordingly, the engagement protruding pieces 5a and 5b are also drawn to the back surface side of the cover body 20 with as even force as possible, so that the mounting state of the decorative member 1 is more stable and due to thermal deformation or the like. Local deformation can be prevented.
[0081]
【The invention's effect】
As described above, according to the airbag cover of the first aspect of the present invention, the engagement projecting piece of the decorative member is inserted into the insertion hole portion with the back plate disposed at the insertion position, When the plate is moved from the insertion position to the engagement position, the elastic urging portion on the back plate abuts against the urging portion abutting portion formed on the back side of the cover body, and at least the engagement of the back plate The engagement portion of the portion is biased in a direction away from the back surface of the cover body, the engagement portion engages with the engaged portion in a retaining shape, and the decorative member is attached to the cover body. Therefore, by moving the back plate from the insertion position to the engagement position, the decoration member can be attached to the cover body without applying a strong force in the pushing direction to the decoration member.
[0082]
In addition, when the decorative member is attached to the cover body, the engagement protruding piece engaged with the engaged portion in a retaining shape is also strongly pulled into the cover body by the urging force of the elastic urging portion. The member is also strongly attracted to the cover body, and the attachment state of the decorative member is stabilized.
[0083]
According to the airbag cover of the second aspect, the elastic protruding piece protruding toward the back surface of the cover body through the stepped portion is formed at the tip of the engaged protruding piece, and the elastic protruding piece is formed on the cover body side. Therefore, the engaged protruding piece with which the engaging protruding piece on the decorative member side is engaged can be effectively urged in the direction away from the back surface of the cover body.
[0084]
Furthermore, in the airbag cover according to claim 3, an elastic protrusion that protrudes toward the back surface of the cover body is formed at a position away from the engaged portion, and the elastic protrusion is formed in the second recess on the cover body side. Due to the contact, a relatively wide part of the back plate can be biased in a direction away from the back surface of the cover body.
[0085]
According to the airbag cover of claim 4, the elastic protruding piece or the elastic protruding portion disposed in the second recess is formed by the protrusion formed between the first recess and the second recess. 1. Since the movement to the concave portion side is restricted, the back plate moves to the engagement position, and the elastic urging portion or the elastic protrusion is in contact with the urging portion abutting portion, that is, the decorative member is covered. It can be kept attached to the body.
[0086]
According to the airbag cover of claim 5, the elastic protrusion piece or the elastic protrusion portion on the second concave portion side is separated from the back surface of the cover body toward the second concave portion. Since the guide inclined part that is inclined in the direction is formed, when the back plate is moved from the insertion position to the engaging position, the guide inclined part slides on the protrusion and the elastic protruding piece or the elastic protruding part is the back surface of the back plate. It is lifted away from. Therefore, when the back plate is moved from the insertion position to the engagement position, the elastic protruding piece or the elastic protruding portion can easily get over the protruding portion.
[0087]
Further, according to the airbag cover of the sixth aspect, the back plate rotates around the engagement shaft portion in a state where the engagement shaft portion is inserted through the shaft engagement hole portion, and is changed from the insertion position to the engagement position. Therefore, the back plate can be accurately moved from the insertion position toward the engagement position without being shifted from the center. In addition, at the engagement position, the decorative member can be held using a configuration in which the retaining engagement protrusion of the engagement shaft portion is engaged with the shaft engagement hole portion in a retaining manner.
[0088]
According to the airbag cover of the seventh aspect, each elastic urging portion corresponds to each urging portion abutting portion corresponding to the back plate around the rotation axis at a substantially equiangular position with respect to the rotation axis. Because of the contact, the force for urging the back plate in the direction away from the back surface of the decorative mounting portion can be distributed over the whole without concentrating it locally. Therefore, each engagement protrusion piece is pulled into the back surface side of the cover body with as even force as possible, and the attachment state of the decorative member becomes more stable.
[Brief description of the drawings]
FIG. 1 is a front view showing a cover body according to an airbag cover according to an embodiment of the present invention.
FIG. 2 is a rear view of the same cover body.
3 is a cross-sectional view taken along line III-III in FIG.
4 is an enlarged cross-sectional view of a main part of FIG. 3;
FIG. 5 is a front view showing a decorative member.
FIG. 6 is a rear view showing a decorative member.
FIG. 7 is a plan view showing a decorative member.
FIG. 8 is a side view showing a decorative member.
9 is a cross-sectional view taken along line IX-IX in FIG.
10 is a cross-sectional view taken along line XX in FIG.
11 is a cross-sectional view taken along line XI-XI in FIG.
FIG. 12 is a view showing a state in which the back plate is disposed at the insertion position.
FIG. 13 is a view showing a state in which the back plate is disposed at the engagement position.
FIG. 14 is a rear view showing the back plate.
15 is a cross-sectional view taken along line XV-XV in FIG.
16 is a sectional view taken along line XVI-XVI in FIG.
17 is a view showing a state in which the elastic protrusion has moved from the first recess to the second recess along the line XVII-XVII in FIG. 12;
18 is a view showing a state in which the elastic protruding piece has moved from the first recess to the second recess along the line XVIII-XVIII in FIG. 12;
FIG. 19 is an enlarged view of a main part showing a cover body and a back plate according to a modification.
20A is a cross-sectional view taken along the line XX-XX in FIG. 19, and FIG. 20B is a view showing a state in which the back plate is disposed at the insertion position in the cross-sectional view.
[Explanation of symbols]
1 decoration
2 Decoration body
5a, 5b engagement protrusion
6a, 6b engaging part
15 Engagement shaft
16 Anti-locking projection
20 Cover body
21 decorative attachment
25a, 25b Through hole
30a, 30b 2nd recessed part (biasing part contact part)
31a, 31b first recess
32a, 32b ridge
35 Through shaft hole
50 Back plate
55a, 55b insertion hole
56a, 56b engaged portion
57b Engaging protrusion
60a Elastic protrusion (elastic biasing part)
60b Elastic protrusion (elastic biasing part)
61a, 61b Guide inclined part
62b Step
65 Shaft engagement hole

Claims

A decorative member in which an engagement protruding piece having an engagement portion is formed on the back surface thereof;
A cover body in which a through-hole capable of penetrating the engagement protruding piece is formed;
An insertion hole portion through which the engagement portion of the engagement protruding piece of the decorative portion protruding to the back surface side of the cover body can be inserted is formed, and the engagement portion is formed in a retaining shape continuously with the insertion hole portion. A back plate on which an engaged portion that can be engaged is formed,
With
An elastic biasing portion is provided on the back plate side,
On the back side of the cover body, an urging portion abutting portion with which the elastic urging portion abuts is provided,
From the insertion position where the back plate can penetrate the engagement projection piece penetrating the through hole into the insertion hole portion of the back plate, the engagement projection piece is engaged with the engaged portion of the back plate. By moving to the engaging position, the elastic urging portion of the back plate is brought into contact with the urging portion abutting portion of the cover body, and the portion where the engaging portion engages is covered with the cover. An airbag cover that biases away from the back of the body.

The airbag cover according to claim 1,
The engaged portion has an engaged protruding piece that is cantilevered so as to extend toward the insertion hole portion;
As the elastic urging portion, an elastic protruding piece that protrudes toward the back surface of the cover body through a step portion from the tip of the engaged protruding piece is formed,
A first recess having a depth larger than the protruding dimension of the elastic protruding piece is formed on the back side of the cover body at a portion corresponding to the elastic protruding piece of the back plate disposed at the insertion position. The urging portion abutting portion is smaller than the projecting dimension of the elastic projecting piece at a portion corresponding to the elastic projecting piece of the back plate provided adjacent to the first recess and disposed at the engaging position. The airbag cover in which the 2nd recessed part of the depth dimension was formed.

The airbag cover according to claim 1,
As the elastic urging portion, an elastic protrusion that protrudes toward the back surface of the cover body at a position away from the engaged portion is formed.
On the back surface side of the cover body, a first recess having a depth larger than the protruding dimension of the elastic protruding portion is formed in a portion corresponding to the elastic protruding portion of the back plate disposed at the insertion position. The biasing portion abutting portion is smaller than the protruding size of the elastic protruding portion at a portion corresponding to the elastic protruding portion of the back plate disposed adjacent to the first recess and disposed at the engaging position. The airbag cover in which the 2nd recessed part of the depth dimension was formed.

The airbag cover according to claim 2 or claim 3,
An airbag cover in which a ridge is formed between the first recess and the second recess.

The airbag cover according to claim 4,
Among the elastic protruding pieces or the elastic protruding portions, the elastic protruding pieces or the elastic protruding portions are arranged on the second concave portion side in the state where the elastic protruding portions are arranged in the first concave portion, and toward the second concave portion. An airbag cover in which a guide inclined portion that is inclined in a direction away from the back surface of the cover body is formed.

The airbag cover according to any one of claims 1 to 5,
An engagement shaft portion is formed to protrude from the decorative member, and the engagement shaft portion protrudes to the back surface side of the cover body through a through shaft hole formed in the cover body.
The back plate has a shaft engagement hole portion through which the engagement shaft portion can be inserted, and the back plate has the engagement shaft portion inserted through the shaft engagement hole portion. By rotating around the engagement shaft portion, it is movable from the insertion position toward the engagement position,
A retaining engagement protrusion is formed at the distal end of the engagement shaft, and the shaft engagement hole can be inserted through the retaining engagement protrusion of the engagement shaft at the insertion position. An airbag cover in which the retaining engagement protrusion is formed in a shape that can be engaged in a retaining shape at a mating position.

The air according to any one of claims 1 to 6, wherein the back plate moves from the insertion position toward the engagement position by rotating around a predetermined rotation axis on the back surface side of the cover body. A bag cover,
A plurality of the elastic urging portions and the corresponding urging portion abutting portions are provided, and each of the elastic urging portions corresponds around the rotation axis at a substantially equiangular position. An airbag cover in contact with each of the urging portion contact portions.