JP3625756B2

JP3625756B2 - Cover structure of airbag device

Info

Publication number: JP3625756B2
Application number: JP2000282879A
Authority: JP
Inventors: 晃史林; 義文田岡
Original assignee: Daihatsu Motor Co Ltd
Current assignee: Daihatsu Motor Co Ltd
Priority date: 2000-09-19
Filing date: 2000-09-19
Publication date: 2005-03-02
Anticipated expiration: 2020-09-19
Also published as: JP2002087196A

Description

【０００１】
【発明の属する技術分野】
本発明は、乗用車や商用車等の車両において、シートの正面（フロントシートの場合にはステアリングハンドルの中央の内部や、ダッシュボードパネルの内部等の位置、リヤシートの場合にはフロントシートのシートバックの位置等）、シートの横側（シートバックの横側部分やＢピラー、Ｃピラー、又はサイドドア等の位置）、Ａピラーやルーフサイドフレーム等に配置されたエアバッグ装置において、エアバッグを覆うカバーの構造に関する。
【０００２】
【従来の技術】
エアバッグ装置を備える場合、エアバッグを覆うカバーが必要になるので、カバーにエアバッグの展開用のリッド部を備えて、エアバッグが膨張して展開する際に、エアバッグがリッド部を開けながら膨張して展開するように構成する。
このようにカバーにリッド部を備える際、カバーとリッド部とを別部品に構成すると、カバーとリッド部との位置合わせが困難で、カバーとリッド部との間に段差が生じ易いと言うような点や、生産工程が増加すると言う点から、カバーにリッド部を一体的に形成するように構成することがある。この場合に、カバーに開裂予定部（例えば線状の薄肉部や溝部、ミシン目状に所定間隔を置いて配置されたスリット等）を備えて、カバーにリッド部を形成するのであり、エアバッグの膨張に伴って開裂予定部が破断し、エアバッグがリッド部を開けながら展開する。
【０００３】
前述のようにエアバッグの膨張に伴って開裂予定部が破断し、エアバッグがリッド部を開けながら展開するように構成した場合、エアバッグの膨張に伴ってリッド部がカバーから引きちぎられるようなことが考えられるので、リッド部の裏面とカバー側の固定部とに亘って飛散防止部材を取り付けたものがある。これにより、リッド部がカバーから引きちぎられて車内に飛散しようとする状態が、飛散防止部材によって止められる。
【０００４】
【発明が解決しようとする課題】
従来の技術に記載のように、開裂予定部は例えば線状の薄肉部や溝部、ミシン目状に所定間隔を置いて配置されたスリット等によって構成されていることが多いので、開裂予定部はカバーの他の部分に比べて比較的弱い状態となっている。これにより、車内の乗員が開裂予定部を上側から押したり、開裂予定部に上側から物を置いたりすると、開裂予定部が下方に変位するのであり、このような状態が繰り返されると、開裂予定部が変色するようなことがある。
本発明は、エアバッグ装置のカバー構造において、開裂予定部によりリッド部をカバーに一体的に形成した場合、開裂予定部が変色するような状態を避けることを目的としている。
【０００５】
【課題を解決するための手段】
請求項１の特徴は、エアバッグ装置のカバー構造において、次のように構成することにある。
エアバッグを覆うカバーに、開裂予定部によりリッド部を一体的に形成する。カバーに取り付けられる基板と、リッド部の裏面に取り付けられる支持板と、基板と支持板とを接続する幅狭の接続部とを備えて構成された金属板製の飛散防止部材を備える。飛散防止部材の基板又は支持板を開裂予定部に接当させ、飛散防止部材の接続部を重ね合わせるように折り曲げて開裂予定部に対向させる。エアバッグの膨張に伴って開裂予定部が破断され飛散防止部材の接続部が曲がりながらリッド部が開き、エアバッグが展開するように構成する。
【０００６】
【０００７】
【０００８】
【０００９】
【００１０】
【００１１】
【００１２】
【００１３】
【００１４】
【発明の実施の形態】
図１，２，３は乗用車や商用車等において、助手席（図示せず）の前方に位置するダッシュボードパネル（図示せず）に形成された樹脂製のカバー１の付近を示しており、一対の縦壁部２及び一対の横壁部３が互いに接続された状態で、カバー１の裏面に一体的に形成されて、横壁部３に開口３ａが形成されている。カバー１の裏面において縦壁部２及び横壁部３で囲まれた部分に、横向きの３本の溝部４，５及び縦向きの２本の溝部６が形成されて、溝部４，５，６によって一対の上リッド部７及び下リッド部８が、上下方向（前後方向）に隣接して並ぶようにカバー１に一体的に形成されている。
【００１５】
図３及び図４に示すように、１枚の金属製の薄い板材により、一対の飛散防止部材９，１０が構成されている。基板１１から幅狭の接続部１２が曲がりながら延出され、接続部１２の各々に支持板１３，１４が形成されて、中央の２つの支持板１４が端部の付近で接続部１５を介して互いに接続されており、基板１１及び支持板１３，１４に開口１１ａ，１３ａ，１４ａが形成されている。このようにして、飛散防止部材９，１０が構成されている。図１，３，５（イ）に示すように、接続部１２は側面視でＺ字状に折り曲げられ重ね合わされており、板厚が見掛け上３倍になっている。
【００１６】
図１及び図２に示すように、上及び下リッド部７，８の裏面に凸部７ａ，８ａが一体的に形成されており、支持板１３，１４の開口１３ａ，１４ａに上及び下リッド部７，８の凸部７ａ，８ａが挿入され熱によるカシメ加工が施されて、上及び下リッド部７，８の裏面に飛散防止部材９，１０が固定されている。この状態で、基板１１が横壁部３に沿う状態となり、基板１１の開口１１ａが横壁部３の開口３ａに対向する状態となる。図５（イ）に示すように、接続部１２が溝部５の下側、カバー１の裏面及び上リッド部７の裏面（下リッド部８の裏面）に亘って接当する状態となっている。
【００１７】
図３及び図４に示すように、支持板１３，１４の端部に複数の凸部１３ｂ，１４ｂが形成されている。これにより、図４に示すように、上及び下リッド部７，８の裏面に飛散防止部材９，１０が固定された状態で、支持板１３，１４の凸部１３ｂ，１４ｂが互いに噛み合うようにジグザグ状に配置されて、溝部４を越えて上及び下リッド部７，８の裏面に交互に入り込むような状態となっており、支持板１３，１４の凸部１３ｂ，１４ｂが溝部４の下側に接当する状態となっている。
【００１８】
図３及び図４に示すように、金属製で薄いアングル状の部材をカバー１の裏面に沿うように少し円弧状に加工して、一対の支持部材１７が構成されており、支持部材１７に開口１７ａが形成されている。図２に示すように、カバー１の裏面に凸部１ａが一体的に形成されており、支持部材１７の開口１７ａにカバー１の凸部１ａが挿入され熱によるカシメ加工が施されて、カバー１の裏面に支持部材１７が固定されている。この状態で図２及び図４に示すように、支持部材１７が溝部６の下側に接当する状態となっている。
【００１９】
次に、エアバッグ装置２０について説明する。図１，２，３に示すように、エアバッグ２１、支持部材２２及びインフレータ２５等によって、エアバッグ装置２０が構成されている。インフレータ２５は、上部の外周部に多数の噴射口２５ａを備え、内部に点火器（図示せず）、エンハンサー（図示せず）、及びガス発生剤（図示せず）が充填されて構成されている。支持部材２２は箱状に構成されて、連結部２４が備えられており、支持部材２２の一部が折り曲げられて複数の支持ブラケット２２ａが形成され、支持ブラケット２２ａに開口２２ｂが形成されている。
【００２０】
次に、カバー１へのエアバッグ装置２０の取り付けについて説明する。図１及び図３に示すように、アングル状で凸部２３ａが形成された固定部材２３が用意されている。これにより、図１，２，３に示すように、エアバッグ２１及びインフレータ２５を支持部材２２に、ボルト１８によって仮固定した状態で、支持部材２２の支持ブラケット２２ａを弾性的に変形させながら、エアバッグ２１を縦壁部２及び横壁部３の内部に入れて、支持部材２２の支持ブラケット２２ａを、基板１１（飛散防止部材９，１０）の開口１１ａ及び横壁部３の開口３ａに挿入する。
【００２１】
図１及び図２に示すように横壁部３の外側から、固定部材２３の凸部２３ａを支持ブラケット２２ａの開口２２ｂに挿入し、ボルト１８によってエアバッグ２１、インフレータ２５、支持部材２２及び固定部材２３を締め付けて固定する。支持部材２２の連結部２４を、車体の固定のフレーム１９に連結する。これにより、カバー１にエアバッグ装置２０が取り付けられた状態となるのであり、飛散防止部材９，１０（基板１１）が横壁部３に取り付けられた状態となる。
【００２２】
以上の構造により、車体に備えられた衝突センサー（図示せず）が衝突を検出すると、インフレータ２５において点火器によりエンハンサーが着火され、エンハンサーの燃焼によりガス発生剤が燃焼し、ガス発生剤から発生したガスが噴射口２５ａから外周方向に放射状に噴射される。エアバッグ２１の周辺部からエアバッグ２１の中央部に向かってガスが流入し、横壁部３及び支持部材１７，２２によって受け止められながらエアバッグ２１が膨張して、エアバッグ２１が上及び下リッド部７，８、支持板１３，１４（飛散防止部材９，１０）を押す。これにより、図１に示すように溝部４，５，６が破断し、重ね合わされている部分が互いに離間し相対的にずれるような状態となって接続部１２が曲がりながら（図５（ロ）参照）、溝部５をヒンジ部分として上及び下リッド部７，８が開かれ、エアバッグ２１の周辺部が先に展開し、エアバッグ２１の中央部が遅れて展開する。
【００２３】
図３に示すように、基板１１（飛散防止部材９，１０）の開口１１ａが縦長状に構成されて、横壁部３及び支持部材２２の支持ブラケット２２ａに対して、基板１１（飛散防止部材９，１０）が上方に移動できる状態となっている。
これにより、前述のように上及びリッド部７，８が開かれるのに伴って、基板１１（飛散防止部材９，１０）が引き上げられようとした際、図５（イ）から図５（ロ）に示すように接続部１２（飛散防止部材９，１０）が延びるようにして曲がる点、基板１１（飛散防止部材９，１０）の開口１１ａが縦長状であることにより、基板１１（飛散防止部材９，１０）が支障なく上方に移動する点によって、上及び下リッド部７，８が開かれる状態が、飛散防止部材９，１０によって妨げられるようなことはない。
【００２４】
カバー１、上及び下リッド部７，８は樹脂製なので、エアバッグ２１の膨張により溝部５が完全に破断して、上及び下リッド部７，８がカバー１から引きちぎられるおそれがある。この場合、飛散防止部材９，１０が金属製であり、基板１１（飛散防止部材９，１０）の上方への移動が、支持部材２２の支持ブラケット２２ａにより止められることによって、上及び下リッド部７，８が車内に飛散するようなことはない。
【００２５】
［発明の実施の第１別形態］
前述の［発明の実施の形態］において、飛散防止部材９，１０の接続部１２の折り曲げ形状を、図６（イ），（ロ），（ハ），（ニ）に示すように構成してもよい。
【００２６】
［発明の実施の第２別形態］
前述の［発明の実施の形態］において、図７（イ）に示すように基板１１（飛散防止部材９，１０）の上辺部１１ｂを、図３及び図５（イ）に示す位置から上方に延長し少し曲げて、基板１１（飛散防止部材９，１０）の上辺部１１ｂを溝部５の下側、カバー１の裏面及び上リッド部７の裏面（下リッド部８の裏面）に亘って接当させるように構成し、基板１１（飛散防止部材９，１０）の上辺部１１ｂの下側に、接続部１２（飛散防止部材９，１０）を位置させるように構成してもよい。
【００２７】
前述の［発明の実施の第１別形態］の図６（ニ）において、図７（ロ）に示すように支持板１３，１４（飛散防止部材９，１０）の辺部１３ｃ，１４ｃを、図３及び図６（ニ）に示す位置から横壁部３側に延長し、支持板１３，１４（飛散防止部材９，１０）の辺部１３ｃ，１４ｃを溝部５の下側、カバー１の裏面及び上リッド部７の裏面（下リッド部８の裏面）に亘って接当させるように構成し、支持板１３，１４（飛散防止部材９，１０）の辺部１３ｃ，１４ｃの下側に、接続部１２（飛散防止部材９，１０）を位置させるように構成してもよい。
【００２８】
図７（イ）（ロ）のように構成すると、溝部５の下側の略全幅に亘って、基板１１（飛散防止部材９，１０）の上辺部１１ｂ（支持板１３，１４（飛散防止部材９，１０）の辺部１３ｃ，１４ｃ）が位置する状態となり、基板１１（飛散防止部材９，１０）の上辺部１１ｂ（支持板１３，１４（飛散防止部材９，１０）の辺部１３ｃ，１４ｃ）の下側に、接続部１２（飛散防止部材９，１０）が部分的に位置する状態となる。
【００２９】
［発明の実施の第３別形態］
前述の［発明の実施の形態］及び［発明の実施の第１別形態］、［発明の実施の第２別形態］において、横向きの溝部４（図４参照）を廃止し、縦向きの３本の溝部６、溝部６の上端及び下端の横向きの２本の溝部５をカバー１の裏面に形成して、溝部５，６によって２個のリッド部（図示せず）を左右に並ぶようにカバー１に一体的に形成し、左右に並ぶ２個のリッド部が左右に開くように構成してもよい。このように構成すると、リッド部の裏面に取り付けられる飛散防止部材９，１０も左右に並ぶ状態となる。
【００３０】
前述の［発明の実施の形態］及び［発明の実施の第１別形態］、［発明の実施の第２別形態］において、図１，２，３，４に示す上及び下リッド部７，８の右隣に右側に開く右リッド部（図示せず）をカバー１に一体的に形成し、上及び下リッド部７，８の左隣に左側に開く左リッド部（図示せず）をカバー１に一体的に形成してもよい。この場合、飛散防止部材９，１０と同様なものを、右及び左リッド部の裏面に取り付けてもよい。
【００３１】
前述の［発明の実施の形態］及び［発明の実施の第１別形態］、［発明の実施の第２別形態］において、横向きの２本の溝部５、溝部５の両端の縦向きの２本の溝部６をカバー１の裏面に形成して、溝部５，６により１つのリッド部（図示せず）をカバー１に一体的に形成し、リッド部が上側の溝部５をヒンジ部分として上方に開くように構成して、１つのリッド部の裏面に、１つの飛散防止部材（図示せず）を取り付けるように構成してもよい。
【００３２】
［発明の実施の第４別形態］
前述の［発明の実施の形態］及び［発明の実施の第１別形態］〜［発明の実施の第３別形態］において、接続部１２（飛散防止部材９，１０）の横幅をさらに大きなものにし、溝部５の略全幅や溝部５の略半分以上に亘って、接続部１２（飛散防止部材９，１０）が配置されるように構成してもよい。溝部４，５，６に換えて、ミシン目状に所定間隔を置いて配置されたスリット等により、上及び下リッド部７，８（リッド部、右及び左リッド部）をカバー１に一体的に形成してもよい。
【００３３】
前述の［発明の実施の形態］及び［発明の実施の第１別形態］〜［発明の実施の第３別形態］において、基板１１（飛散防止部材９，１０）の開口１１ａを縦長状（図３参照）に構成するのを廃止して、横壁部３及び支持部材２２の支持ブラケット２２ａに対して、基板１１（飛散防止部材９，１０）が上方に移動できないように構成してもよい。このように構成すると、上及びリッド部７，８が開かれるのに伴って、基板１１（飛散防止部材９，１０）が引き上げられようとした際、例えば図５（イ）から図５（ロ）に示すように接続部１２（飛散防止部材９，１０）が延びるようにして曲がることのみにより、上及び下リッド部７，８が開かれる状態が飛散防止部材９，１０によって妨げられないようになる。
前述の［発明の実施の形態］及び［発明の実施の第１別形態］〜［発明の実施の第３別形態］において、ダッシュボードパネルとカバー１とを別体に構成するのではなく、ダッシュボードパネルにカバー１、上及び下リッド部７，８（リッド部、右及び左リッド部）を一体的に形成してもよい。
【００３４】
【発明の効果】
請求項１の特徴によると、エアバッグ装置のカバー構造において、開裂予定部によりリッド部をカバーに一体的に形成した場合に、開裂予定部が上側から押されても、開裂予定部が変位させられる状態を抑えることができるので、開裂予定部が変色するような状態を避けることができるようになって、カバー及びリッド部の品質感の維持を図ることができた。
【００３５】
【００３６】
【００３７】
【００３８】
【図面の簡単な説明】
【図１】上及び下リッド部、飛散防止部材、エアバッグ装置の付近の縦断側面図
【図２】上及び下リッド部、飛散防止部材、エアバッグ装置の付近の横断下面図
【図３】上及び下リッド部、飛散防止部材、エアバッグ装置の付近の分解斜視図
【図４】飛散防止部材の付近の平面図
【図５】接続部（飛散防止部材）の付近の縦断側面図
【図６】発明の実施の第１別形態での接続部（飛散防止部材）の付近の縦断側面図
【図７】発明の実施の第２別形態での接続部（飛散防止部材）の付近の縦断側面図
【符号の説明】
１カバー
４，５，６開裂予定部
７，８リッド部
９，１０飛散防止部材
１１基板
１２接続部
１３，１４支持板
２１エアバッグ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle such as a passenger car or a commercial vehicle, in the front of the seat (in the case of a front seat, in the center of the steering handle, in the dashboard panel, etc., in the case of a rear seat, the seat back of the front seat). In the airbag device disposed on the side of the seat (the side portion of the seat back, the position of the B pillar, the C pillar , or the side door), the A pillar, the roof side frame, or the like. It relates to the structure of the covering cover.
[0002]
[Prior art]
When the airbag device is provided, a cover for covering the airbag is required. Therefore, the lid is provided with a lid portion for deploying the airbag, and when the airbag is inflated and deployed, the airbag opens the lid portion. While expanding, it is configured to expand.
As described above, when the cover is provided with the lid portion, if the cover and the lid portion are configured as separate parts, it is difficult to align the cover and the lid portion, and a step is likely to occur between the cover and the lid portion. In other words, the lid part may be formed integrally with the cover because the production process increases. In this case, the cover is provided with a portion to be cleaved (for example, a linear thin-walled portion or a groove portion, a slit arranged at a predetermined interval in a perforated shape), and a lid portion is formed on the cover. As the air bag expands, the planned tearing portion breaks, and the airbag deploys while opening the lid portion.
[0003]
As described above, when the airbag is inflated, the planned tearing portion is broken, and the airbag is deployed while opening the lid portion, so that the lid portion is torn off from the cover as the airbag is inflated. Therefore, there is one in which a scattering prevention member is attached across the back surface of the lid portion and the fixing portion on the cover side. As a result, the state in which the lid portion is torn off from the cover and is about to fly into the vehicle is stopped by the scattering prevention member.
[0004]
[Problems to be solved by the invention]
As described in the prior art, the planned cleavage portion is often composed of, for example, linear thin-walled portions and groove portions, slits arranged at predetermined intervals in a perforated shape, etc. It is in a relatively weak state compared to other parts of the cover. As a result, when an occupant in the vehicle pushes the part to be cleaved from above or puts an object on the part to be cleaved from above, the part to be cleaved is displaced downward. The part may be discolored.
An object of the present invention is to avoid a state in which the planned tearing portion is discolored when the lid portion is integrally formed on the cover by the planned tearing portion in the cover structure of the airbag device.
[0005]
[Means for Solving the Problems]
The feature of claim 1 is that the cover structure of the airbag apparatus is configured as follows.
A lid portion is integrally formed with the cover that covers the airbag by the portion to be cleaved. A scattering prevention member made of a metal plate is provided that includes a substrate attached to the cover, a support plate attached to the back surface of the lid portion, and a narrow connection portion that connects the substrate and the support plate. The substrate or support plate of the anti-scattering member is brought into contact with the planned cleavage portion, and the connection portion of the anti-scattering member is folded so as to be overlapped to face the anti-decompression portion. As the airbag is inflated, the planned opening portion is broken, the lid portion is opened while the connecting portion of the anti-scattering member is bent, and the airbag is deployed.
[0006]
[0007]
[0008]
[0009]
[0010]
[0011]
[0012]
[0013]
[0014]
DETAILED DESCRIPTION OF THE INVENTION
1, 2 and 3 show the vicinity of a resin cover 1 formed on a dashboard panel (not shown) located in front of a passenger seat (not shown) in a passenger car or a commercial vehicle, In a state where the pair of vertical wall portions 2 and the pair of horizontal wall portions 3 are connected to each other, they are integrally formed on the back surface of the cover 1, and an opening 3 a is formed in the horizontal wall portion 3. Three laterally extending groove portions 4 and 5 and two vertically extending groove portions 6 are formed in a portion surrounded by the vertical wall portion 2 and the horizontal wall portion 3 on the back surface of the cover 1, and the groove portions 4, 5, 6 A pair of the upper lid portion 7 and the lower lid portion 8 are formed integrally with the cover 1 so as to be arranged adjacent to each other in the vertical direction (front-rear direction).
[0015]
As shown in FIGS. 3 and 4, the pair of scattering prevention members 9 and 10 are configured by a single thin metal plate. A narrow connection portion 12 extends from the substrate 11 while being bent, and support plates 13 and 14 are formed in each of the connection portions 12, and the two support plates 14 at the center pass through the connection portions 15 in the vicinity of the end portions. The openings 11a, 13a, and 14a are formed in the substrate 11 and the support plates 13 and 14, respectively. In this way, the scattering preventing members 9 and 10 are configured. As shown in FIGS. 1, 3, and 5 (a), the connecting portion 12 is folded in a Z shape in a side view and overlapped, and the plate thickness is apparently tripled.
[0016]
As shown in FIGS. 1 and 2, convex portions 7 a and 8 a are integrally formed on the back surfaces of the upper and lower lid portions 7 and 8, and the upper and lower lids are formed in the openings 13 a and 14 a of the support plates 13 and 14. The protrusions 7a and 8a of the portions 7 and 8 are inserted and crimped by heat, and the anti-scattering members 9 and 10 are fixed to the back surfaces of the upper and lower lid portions 7 and 8. In this state, the substrate 11 is in a state along the horizontal wall portion 3, and the opening 11 a of the substrate 11 is opposed to the opening 3 a of the horizontal wall portion 3. As shown in FIG. 5A, the connecting portion 12 is in contact with the lower side of the groove portion 5, the back surface of the cover 1, and the back surface of the upper lid portion 7 (the back surface of the lower lid portion 8). .
[0017]
As shown in FIGS. 3 and 4, a plurality of convex portions 13 b and 14 b are formed at the ends of the support plates 13 and 14. Thus, as shown in FIG. 4, the protrusions 13 b and 14 b of the support plates 13 and 14 are engaged with each other in a state where the scattering prevention members 9 and 10 are fixed to the back surfaces of the upper and lower lid portions 7 and 8. It is arranged in a zigzag shape so as to alternately enter the back surfaces of the upper and lower lid portions 7 and 8 beyond the groove portion 4, and the convex portions 13 b and 14 b of the support plates 13 and 14 are below the groove portion 4. It is in a state where it touches the side.
[0018]
As shown in FIG. 3 and FIG. 4, a pair of support members 17 is formed by processing a metal thin angle member into a slightly arc shape along the back surface of the cover 1. An opening 17a is formed. As shown in FIG. 2, the convex portion 1 a is integrally formed on the back surface of the cover 1, and the convex portion 1 a of the cover 1 is inserted into the opening 17 a of the support member 17 and subjected to caulking processing by heat. A support member 17 is fixed to the back surface of the first member. In this state, as shown in FIGS. 2 and 4, the support member 17 is in contact with the lower side of the groove 6.
[0019]
Next, the airbag device 20 will be described. As shown in FIGS. 1, 2, and 3, an airbag device 20 is configured by the airbag 21, the support member 22, the inflator 25, and the like. The inflator 25 includes a large number of injection holes 25a on the outer periphery of the upper portion, and is filled with an igniter (not shown), an enhancer (not shown), and a gas generating agent (not shown). Yes. The support member 22 is formed in a box shape and includes a connecting portion 24. A part of the support member 22 is bent to form a plurality of support brackets 22a, and an opening 22b is formed in the support bracket 22a. .
[0020]
Next, attachment of the airbag device 20 to the cover 1 will be described. As shown in FIG.1 and FIG.3, the fixing member 23 which the convex part 23a was formed in the angle shape is prepared. 1, 2 and 3, while the airbag 21 and the inflator 25 are temporarily fixed to the support member 22 by the bolt 18, the support bracket 22a of the support member 22 is elastically deformed, The airbag 21 is inserted into the vertical wall portion 2 and the horizontal wall portion 3, and the support bracket 22 a of the support member 22 is inserted into the opening 11 a of the substrate 11 (scattering prevention members 9, 10) and the opening 3 a of the horizontal wall portion 3. .
[0021]
As shown in FIGS. 1 and 2, the protrusion 23 a of the fixing member 23 is inserted into the opening 22 b of the support bracket 22 a from the outside of the lateral wall portion 3, and the airbag 21, the inflator 25, the support member 22, and the fixing member are Tighten 23 and fix. The connecting portion 24 of the support member 22 is connected to a fixed frame 19 of the vehicle body. Thus, the airbag device 20 is attached to the cover 1, and the scattering prevention members 9 and 10 (substrate 11) are attached to the lateral wall portion 3.
[0022]
With the above structure, when a collision sensor (not shown) provided in the vehicle body detects a collision, the enhancer is ignited by the igniter in the inflator 25, and the gas generating agent is combusted by the combustion of the enhancer and is generated from the gas generating agent. The discharged gas is ejected radially from the ejection port 25a in the outer circumferential direction. Gas flows from the peripheral portion of the airbag 21 toward the central portion of the airbag 21, and the airbag 21 is inflated while being received by the lateral wall portion 3 and the support members 17 and 22, so that the airbag 21 is in the upper and lower lids. The parts 7 and 8 and the support plates 13 and 14 (scattering prevention members 9 and 10) are pushed. As a result, as shown in FIG. 1, the groove portions 4, 5, and 6 are broken, and the overlapping portions are separated from each other and are relatively displaced, while the connecting portion 12 is bent (FIG. 5B). The upper and lower lid portions 7 and 8 are opened using the groove portion 5 as a hinge portion, the peripheral portion of the airbag 21 is deployed first, and the central portion of the airbag 21 is deployed with a delay.
[0023]
As shown in FIG. 3, the opening 11 a of the substrate 11 (scattering prevention members 9, 10) is formed in a vertically long shape, and the substrate 11 (scattering prevention member 9) with respect to the lateral wall 3 and the support bracket 22 a of the support member 22. , 10) can move upward.
Thus, when the substrate 11 (scattering prevention members 9 and 10) is pulled up as the upper and lid portions 7 and 8 are opened as described above, FIG. 5 (A) to FIG. ), The connecting portion 12 (scattering prevention members 9 and 10) is bent so that it extends, and the opening 11a of the substrate 11 (scattering prevention members 9 and 10) is vertically long. The state in which the upper and lower lid portions 7 and 8 are opened by the point that the members 9 and 10) move upward without hindrance is not hindered by the scattering prevention members 9 and 10.
[0024]
Since the cover 1 and the upper and lower lid portions 7 and 8 are made of resin, the groove portion 5 may be completely broken by the inflation of the airbag 21, and the upper and lower lid portions 7 and 8 may be torn off from the cover 1. In this case, the scattering prevention members 9 and 10 are made of metal, and the upward movement of the substrate 11 (scattering prevention members 9 and 10) is stopped by the support bracket 22a of the support member 22, whereby the upper and lower lid portions. 7,8 will not be scattered in the car.
[0025]
[First Alternative Embodiment of the Invention]
In the above-mentioned [Embodiments of the invention], the bent shape of the connecting portion 12 of the anti-scattering members 9, 10 is configured as shown in FIGS. 6 (a), (b), (c), (d). Also good.
[0026]
[Second Embodiment of the Invention]
In the above-mentioned [Embodiment of the invention], as shown in FIG. 7 (a), the upper side portion 11b of the substrate 11 (scattering prevention members 9, 10) is moved upward from the position shown in FIGS. 3 and 5 (a). Extending and bending a little, the upper side 11b of the substrate 11 (scattering prevention members 9, 10) is in contact with the lower side of the groove 5, the back of the cover 1, and the back of the upper lid 7 (the back of the lower lid 8). You may comprise so that it may be made, and you may comprise so that the connection part 12 (scattering prevention member 9,10) may be located under the upper side part 11b of the board | substrate 11 (scattering prevention member 9,10).
[0027]
In FIG. 6 (d) of the above-mentioned [first alternative embodiment of the invention], as shown in FIG. 7 (b), the side portions 13c, 14c of the support plates 13, 14 (scattering prevention members 9, 10) are 3 and 6 (d), the side walls 13c and 14c of the support plates 13 and 14 (scattering prevention members 9 and 10) are disposed below the groove 5 and the back surface of the cover 1 from the position shown in FIGS. The upper lid portion 7 is configured to contact over the back surface (the back surface of the lower lid portion 8), and below the side portions 13c and 14c of the support plates 13 and 14 (scattering prevention members 9 and 10). You may comprise so that the connection part 12 (scattering prevention members 9 and 10) may be located.
[0028]
7A and 7B, the upper side portion 11b (support plates 13 and 14 (scattering prevention members) of the substrate 11 (scattering prevention members 9 and 10) extends over substantially the entire width below the groove portion 5. 9, 10) side portions 13 c, 14 c) are positioned, and the upper side portion 11 b (support plates 13, 14 (scattering prevention members 9, 10) of the substrate 11 (scattering prevention members 9, 10) 14c), the connecting portion 12 (scattering prevention members 9, 10) is partially located.
[0029]
[Third Another Embodiment of the Invention]
In the above-mentioned [Embodiment of the invention] and [First alternative embodiment of the invention] and [Second alternative embodiment of the invention], the horizontal groove 4 (see FIG. 4) is eliminated, and the vertical 3 The two groove portions 6 are formed on the back surface of the cover 1 so that the two lid portions (not shown) are arranged side by side on the left and right sides. It may be formed integrally with the cover 1 so that the two lid parts arranged side by side open to the left and right. If comprised in this way, the scattering prevention members 9 and 10 attached to the back surface of a lid part will also be in the state located in a line with right and left.
[0030]
In the above-mentioned [Embodiment of the invention] and [First alternative embodiment of the invention] and [Second alternative embodiment of the invention], the upper and lower lid portions 7 shown in FIGS. A right lid portion (not shown) that opens to the right next to 8 is formed integrally with the cover 1, and a left lid portion (not shown) that opens to the left is adjacent to the left of the upper and lower lid portions 7, 8. The cover 1 may be integrally formed. In this case, you may attach the thing similar to the scattering prevention members 9 and 10 to the back surface of a right and a left lid part.
[0031]
In the above-mentioned [Embodiment of the Invention], [First Alternative Embodiment of the Invention], and [Second Alternative Embodiment of the Invention], the two grooves 5 in the lateral direction and the two in the vertical direction at both ends of the groove 5 are shown. A groove portion 6 is formed on the back surface of the cover 1, and one lid portion (not shown) is formed integrally with the cover 1 by the groove portions 5, 6, and the lid portion is located above the upper groove portion 5 as a hinge portion. configured to open, the back surface of one of the lid portion may be configured to attach one scattering prevention member (not shown).
[0032]
[Fourth Embodiment of the Invention]
In the above-mentioned [Embodiment of the Invention] and [First Alternative Embodiment of the Invention] to [Third Alternative Embodiment of the Invention], the connecting portion 12 (scattering prevention member 9, 10) has a larger lateral width. to groove 5 substantially across the entire width and the groove 5 substantially more than half of, may be configured to connection 12 (scattering prevention member 9, 10) is arranged. The upper and lower lid portions 7 and 8 (the lid portion, the right and left lid portions) are integrated with the cover 1 by slits arranged at predetermined intervals in a perforated manner instead of the groove portions 4, 5 and 6. You may form in.
[0033]
In the above-mentioned [Embodiment of the Invention] and [First Alternative Embodiment of the Invention] to [Third Alternative Embodiment of the Invention], the opening 11a of the substrate 11 (scattering prevention members 9, 10) is formed in a vertically long shape ( The structure shown in FIG. 3 may be abolished so that the substrate 11 (scattering prevention members 9 and 10) cannot move upward with respect to the lateral wall 3 and the support bracket 22a of the support member 22. . With this configuration, when the substrate 11 (scattering prevention members 9 and 10) is pulled up as the upper and lid portions 7 and 8 are opened, for example, FIG. ) So that the upper and lower lid portions 7 and 8 are not opened by the anti-scattering members 9 and 10 only by bending the connecting portion 12 (anti-scattering members 9 and 10) as shown in FIG. become.
In the above-mentioned [Embodiment of the Invention] and [First Alternative Embodiment of the Invention] to [Third Alternative Embodiment of the Invention], the dashboard panel and the cover 1 are not configured separately. The cover 1 and the upper and lower lid portions 7 and 8 (the lid portion, the right and left lid portions) may be integrally formed on the dashboard panel.
[0034]
【The invention's effect】
According to the features of claim 1, in a cover structure for an air bag device, in case of forming integrally the lid portion to cover by cleavage scheduled portion, also cleavage scheduled portion is pressed from the upper side, the cleavage scheduled portion is Since the displaced state can be suppressed, it is possible to avoid a state in which the planned cleavage portion is discolored, and it is possible to maintain the quality of the cover and the lid portion.
[0035]
[0036]
[0037]
[0038]
[Brief description of the drawings]
FIG. 1 is a longitudinal side view of the upper and lower lid portions, a scattering prevention member, and the vicinity of the airbag device. FIG. 2 is a transverse bottom view of the upper and lower lid portions, the scattering prevention member, and the airbag device. Fig. 4 is an exploded perspective view of the upper and lower lid parts, the scattering prevention member, and the vicinity of the airbag device. Fig. 4 is a plan view of the vicinity of the scattering prevention member. 6 is a longitudinal side view of the vicinity of the connecting portion (scattering prevention member) in the first alternative embodiment of the present invention. FIG. 7 is a vertical sectional view of the vicinity of the connecting portion (scattering prevention member) of the second alternative embodiment of the invention. Side view [Explanation of symbols]
1 Cover 4, 5, 6 Planned cleavage part 7, 8 Lid part 9, 10 Spattering prevention member
11 Substrate
12 connections
13, 14 Support plate 21 Air bag

Claims

エアバッグを覆うカバーに、開裂予定部によりリッド部を一体的に形成し、
前記カバーに取り付けられる基板と、前記リッド部の裏面に取り付けられる支持板と、前記基板と支持板とを接続する幅狭の接続部とを備えて構成された金属板製の飛散防止部材を備え、
前記飛散防止部材の基板又は支持板を開裂予定部に接当させ、前記飛散防止部材の接続部を重ね合わせるように折り曲げて開裂予定部に対向させて、
前記エアバッグの膨張に伴って前記開裂予定部が破断され、前記飛散防止部材の接続部が曲がりながら前記リッド部が開き、前記エアバッグが展開するように構成してあるエアバッグ装置のカバー構造。In the cover that covers the airbag, the lid part is integrally formed by the planned cleavage part,
A metal plate scattering prevention member comprising a substrate attached to the cover, a support plate attached to the back surface of the lid portion, and a narrow connection portion connecting the substrate and the support plate is provided. ,
The substrate or support plate of the anti-scattering member is brought into contact with the planned cleavage part, and the connection part of the anti-scattering member is folded so as to be overlapped with the anti-decompression part,
A cover structure for an airbag device configured such that the scheduled opening portion is broken as the airbag is inflated, the lid portion is opened while the connecting portion of the anti-scattering member is bent, and the airbag is deployed. .