JPH0510119U - Air back cover - Google Patents
Air back coverInfo
- Publication number
- JPH0510119U JPH0510119U JP029846U JP2984691U JPH0510119U JP H0510119 U JPH0510119 U JP H0510119U JP 029846 U JP029846 U JP 029846U JP 2984691 U JP2984691 U JP 2984691U JP H0510119 U JPH0510119 U JP H0510119U
- Authority
- JP
- Japan
- Prior art keywords
- cover body
- airbag
- core layer
- skin layer
- airbag cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Air Bags (AREA)
- Laminated Bodies (AREA)
Abstract
(57)【要約】
【目的】 エアバックカバ−体が内部から押されていて
も、カバ−体表面上には破断部予定線が現れることがな
く、見栄えがよく、かつ信頼性の高いエアバックカバ−
体を提供すること。
【構成】 エアバック展開時に破断する破断部を設けた
エアバック用カバー体において、該破断部は硬度の低い
熱可塑性エラストマーからなる表皮層と硬度の高い熱可
塑性エラストマー又は熱可塑性樹脂からなるコア層とを
一体に成形してなるカバー体のコア層の表皮層と接する
側に薄肉凹部として形成されていることを特徴とするエ
アバック用カバー体。
(57) [Abstract] [Purpose] Even if the airbag cover body is pressed from the inside, the expected break line does not appear on the surface of the cover body, and it has good appearance and high reliability. Back cover
To provide the body. A cover body for an airbag provided with a rupture portion that ruptures when the airbag is deployed, wherein the rupture portion is a skin layer made of a thermoplastic elastomer having a low hardness and a core layer made of a thermoplastic elastomer or a thermoplastic resin having a high hardness. An air bag cover body, characterized in that it is formed as a thin-walled concave portion on the side of the core body of the cover body, which is integrally formed with, and which is in contact with the skin layer.
Description
【０００１】[0001]
本考案は、車輌衝突時、衝撃を感知して作動するガス発生器により膨脹、展開 するエアバックを収納するためのエアバックカバー体に関する。 The present invention relates to an air bag cover body for accommodating an air bag that is inflated and expanded by a gas generator that operates by sensing a shock when a vehicle collides.
【０００２】[0002]
従来、エアバックカバー体として表皮層とコア層とを一体に成形してなり、バ ック展開時に破断部となるコア層から表皮層の一部に達するスリットを備えたも のがある（実公昭５６−４８６０６号、特開平１−２０２５５０号）。 Conventionally, as an airbag cover body, a skin layer and a core layer are integrally formed, and there is one that is provided with a slit reaching a part of the skin layer from the core layer, which becomes a breakage part when the back is expanded (actually, JP-A-56-48606, JP-A-1-202550).
【０００３】 しかし、こうした構造のエアバックカバー体では、それに内蔵された折りたた まれたバックやインフレーターから押されてその表面にスリットラインが現れて しまい、見栄えを悪くしている。However, in an airbag cover body having such a structure, a slit line appears on the surface of the airbag cover body when it is pushed by a folded bag and an inflator built in the airbag cover body, which makes it unattractive.
【０００４】[0004]
本考案は、こうした実情に応じて、エアバックカバー体表面がその内部から押 されていてもカバー体表面上には破断部予定線が現れることがなく、見栄えがよ い、しかもエアバック展開時には確実に破断して信頼性も高いエアバックカバー 体を提供することを目的とするものである。 According to such a situation, the present invention does not show a projected break line on the cover body surface even if the surface of the airbag cover body is pressed from the inside, so that it looks good, and when the airbag is deployed, It is an object of the present invention to provide an airbag cover body that is reliably broken and has high reliability.
【０００５】[0005]
本考案者は、鋭意検討した結果、表皮層に硬度の低いエラストマーを用い、コ ア層に硬度の高いエラストマー又は熱可塑性樹脂を用い、破断部となる薄肉部は コア層に設け、かつ、そのコア層の薄肉部が表皮層によって埋められている構造 とすることが有効であることを知見し、本考案に至った。 As a result of diligent studies, the present inventor has conducted a study, using an elastomer having a low hardness for the skin layer, an elastomer having a high hardness or a thermoplastic resin for the core layer, and providing a thin portion to be a fracture portion in the core layer, and The inventors have found that it is effective to have a structure in which the thin portion of the core layer is filled with a skin layer, and arrived at the present invention.
【０００６】 すなわち、本考案は、エアバック展開時に破断する破断部を設けたエアバック 用カバー体において、該破断部は硬度の低い熱可塑性エラストマーからなる表皮 層と硬度の高い熱可塑性エラストマー又は熱可塑性樹脂からなるコア層とを一体 に成形してなるカバー体のコア層の表皮層と接する側に薄肉凹部として形成され ていることを特徴とするエアバック用カバー体である。That is, the present invention provides an air bag cover body provided with a ruptured portion that ruptures when the airbag is deployed, wherein the ruptured portion is a skin layer made of a thermoplastic elastomer having a low hardness and a thermoplastic elastomer having a high hardness or a thermoplastic elastomer. The airbag cover body is characterized by being formed as a thin recess on the side of the cover body that is integrally molded with a core layer made of a plastic resin in contact with the skin layer of the core layer.
【０００７】 本考案を図面に基づいて説明する。The present invention will be described with reference to the drawings.
【０００８】 図２はステアリングホイールに組込まれたエアバックカバー体の平面図で、図 １は図２Ｉ−Ｉでの断面図である。図１中１はエアバックカバー体、１ａは表皮 層、１ｂはコア層、２はエアバックカバー体内に収納されるエアバック、３はイ ンフレーター、４は破断部を表す。図３は図２の破断部の拡大図で５はコア層凸 部、６はコア層凹部、７は斜面、８は表皮層凸部を表す。図４はエアバックが膨 脹、展開してエアバックカバー体を破断した状態の説明図、図５はエアバックカ バー体破断時の破断部の拡大図、又、図６、７は破断部の別の構成例を示す図で ある。FIG. 2 is a plan view of the airbag cover body incorporated in the steering wheel, and FIG. 1 is a sectional view taken along line I-I of FIG. In FIG. 1, 1 is an airbag cover body, 1a is a skin layer, 1b is a core layer, 2 is an airbag accommodated in the airbag cover body, 3 is an inflator, and 4 is a broken portion. FIG. 3 is an enlarged view of the broken portion in FIG. 2, where 5 is a core layer convex portion, 6 is a core layer concave portion, 7 is a slope, and 8 is a skin layer convex portion. FIG. 4 is an explanatory view of a state where the airbag is inflated and expanded and the airbag cover body is broken, FIG. 5 is an enlarged view of a broken portion when the airbag cover body is broken, and FIGS. It is a figure which shows the structural example.
【０００９】 本考案においてエアバックカバー体の表皮層に用いる硬度の低い熱可塑性エラ ストマーは、ＪＩＳ−Ａ硬度３０〜５５、好ましくは３６〜４０の軟質のエラス トマー樹脂で、好ましくは１００％モジュラス１０ｋｇ／ｃｍ2以下、破断強度 ３５ｋｇ／ｃｍ2以下、引裂強度１５ｋｇ／ｃｍ2以下のものである。In the present invention, the thermoplastic elastomer having a low hardness used for the skin layer of the airbag cover is a soft elastomer resin having a JIS-A hardness of 30 to 55, preferably 36 to 40, and preferably 100% modulus. It has a breaking strength of 10 kg / cm 2 or less, a breaking strength of 35 kg / cm 2 or less, and a tear strength of 15 kg / cm 2 or less.
【００１０】 このような熱可塑性エラストマーとしては、スチレン−ジエン系エラストマー 、スチレン−オレフィン系エラストマー、オレフィン系エラストマー、塩化ビニ ル系エラストマー等が挙げられる。Examples of such a thermoplastic elastomer include a styrene-diene-based elastomer, a styrene-olefin-based elastomer, an olefin-based elastomer, and a vinyl chloride-based elastomer.
【００１１】 又、本考案においてエアバックカバー体のコア層に用いる硬度の高い熱可塑性 エラストマー又は熱可塑性樹脂は、ＪＩＳ−Ａ硬度８５以上の硬質のエラストマ ー又は熱可塑性樹脂で、好ましくは曲げ弾性率２０００〜５０００ｋｇ／ｃｍ2 、破断強度２００ｋｇ／ｃｍ2以下、１００％モジュラス３０〜６０ｋｇ／ｃｍ2 のものである。Further, in the present invention, the thermoplastic elastomer or thermoplastic resin having a high hardness used for the core layer of the airbag cover body is a hard elastomer or thermoplastic resin having JIS-A hardness of 85 or more, preferably flexural elasticity. rate 2000~5000kg / cm 2, breaking strength 200 kg / cm 2 or less, but 100% modulus 30~60kg / cm 2.
【００１２】 このような硬質の熱可塑性エラストマー又は熱可塑性樹脂としては、例えば前 記に挙げた熱可塑性エラストマーと同系で硬度がＪＩＳ−Ａ８５以上のもの、あ るいはスチレン系樹脂、ポリプロピレン等のオレフィン系樹脂、塩化ビニル系樹 脂等を挙げることができる。As such a hard thermoplastic elastomer or thermoplastic resin, for example, those having the same hardness as the above-mentioned thermoplastic elastomer and a hardness of JIS-A85 or more, or a styrene resin, an olefin such as polypropylene, or the like. Examples thereof include resins and vinyl chloride resins.
【００１３】 本考案においては、すでに述べたように、エアバックが展開、膨脹するとき、 エアバックカバー体の破断部となる薄肉部箇所はコア層の表皮層側に設けられる 。その薄肉破断部の形状は、Ｖ字状、Ｕ字状等特に制限はないが、本考案におい てはＶ字状（図７）、あるいは図３に示すごとくコア層の表皮層側において鋭角 をなす凸部と凹部とが隣接するような形状とするのが好ましい。In the present invention, as described above, when the airbag is inflated and inflated, the thin-walled portion serving as the breakage portion of the airbag cover body is provided on the skin layer side of the core layer. The shape of the thin-walled fractured part is not particularly limited, such as V-shaped or U-shaped, but in the present invention, it is V-shaped (FIG. 7), or as shown in FIG. 3, there is an acute angle on the skin layer side of the core layer. It is preferable that the formed convex portion and the concave portion are adjacent to each other.
【００１４】[0014]
破断部をこのような構成とすることにより、コア層の薄肉部は表皮層の軟質の エラストマーにより充填されるので、エアバックカバー体が内部から押されても コア層の薄肉部における応力は表皮層のエラストマーによって吸収、分散され、 コア層の破断部のラインがカバー体表面に現れるということはない。 With such a structure of the fractured part, the thin-walled part of the core layer is filled with the soft elastomer of the skin layer, so that the stress in the thin-walled part of the core layer is not affected even if the airbag cover is pushed from the inside. It is absorbed and dispersed by the elastomer of the layer, and the line of the broken portion of the core layer does not appear on the surface of the cover body.
【００１５】[0015]
本考案のエアバックカバー体は、破断部の構造が重要であり、以下にその具体 的構成例を示す。 In the airbag cover body of the present invention, the structure of the broken portion is important, and a specific configuration example will be shown below.
【００１６】 図３は本考案の最も好ましい態様を表すものである。FIG. 3 shows the most preferred embodiment of the present invention.
【００１７】 このように、コア層の破断部をコア層の凹部６と表皮層の凸部８を構成する斜 面７を延長してコア層に凸部５を設けた場合には、破断時にはまずコア凹部６よ り破断し、斜面７にて表皮層１ａとコア層１ｂとが分離し、コア凸部５の部分に て表皮層１ａが破断する。このように図３の構成とした場合には斜面にそって破 断が一層確実に行われ、しかも飛散物がない。As described above, when the rupture portion of the core layer is provided with the convex portion 5 on the core layer by extending the slope 7 forming the concave portion 6 of the core layer and the convex portion 8 of the skin layer, First, the core concave portion 6 is broken, the skin layer 1a and the core layer 1b are separated at the slope 7, and the skin convex portion 5 is broken at the core convex portion 5. In this way, in the case of the configuration of FIG. 3, the rupture is more reliably performed along the slope, and there is no scattered matter.
【００１８】 図６は、別の実施例で破断部の肉厚を他の一般部の肉厚と同一とした場合であ る。FIG. 6 shows a case in which the thickness of the fractured portion is the same as the thicknesses of the other general portions in another embodiment.
【００１９】 図７はさらに別の実施例で、この場合にはコア層にＶ字形の薄肉部を設け、さ らにこの破断部付近のコア層を表皮層側にくい込ませ、表皮層の肉厚を薄くした 場合である。FIG. 7 shows still another embodiment. In this case, a V-shaped thin portion is provided in the core layer, and the core layer near the fracture is made to be difficult to be inserted into the skin layer side, and the meat of the skin layer is formed. This is the case when the thickness is reduced.
【００２０】[0020]
以上説明したように、本考案によれば、エアバックカバー体表面は軟質の材料 で形成されているので感触がよく、しかもエアバック展開時に破断部となるライ ンが現出することがなく、見栄えが改善され、かつ、緊急時には確実に破断して 搭乗者を保護することができ、美観と信頼性を兼備したエアバックカバー体を提 供することができる。 As described above, according to the present invention, the surface of the air bag cover is made of a soft material, so that it has a good feel, and the line that becomes a breaking portion does not appear when the air bag is deployed. It is possible to provide an airbag cover body that is both aesthetically pleasing and reliable, with improved appearance and the ability to reliably break and protect passengers in an emergency.
【図１】図２Ｉ・Ｉ線断面図。FIG. 1 is a sectional view taken along line I-I of FIG.
【図２】ステアリングホイールに組込まれたエアバック
カバー体の平面図。FIG. 2 is a plan view of an airbag cover body incorporated in a steering wheel.
【図３】図２の破断部の拡大部。FIG. 3 is an enlarged view of the broken part of FIG.
【図４】エアバックが膨脹、展開してエアバックカバー
体を破断した状態の説明図。FIG. 4 is an explanatory view of a state in which the airbag is inflated and deployed and the airbag cover body is broken.
【図５】エアバックカバー体破断時の破断部の拡大図。FIG. 5 is an enlarged view of a fractured portion when the airbag cover body is fractured.
【図６】本考案のエアバックカバー体の破断部の別の実
施例を示す説明図。FIG. 6 is an explanatory view showing another embodiment of the broken portion of the airbag cover body of the present invention.
【図７】本考案のエアバックカバー体の破断部のさらに
別の実施例を示す説明図。FIG. 7 is an explanatory view showing still another embodiment of the breakage portion of the airbag cover body of the present invention.
フロントページの続き (72)考案者 稲葉 和男 静岡県富士市青島町218番地 日本プラス ト株式会社内Continued Front Page (72) Inventor Kazuo Inaba 218 Aoshima-cho, Fuji-shi, Shizuoka Japan Plast Co., Ltd.
Claims (1)
けたエアバック用カバー体において、該破断部は硬度の
低い熱可塑性エラストマーからなる表皮層と硬度の高い
熱可塑性エラストマー又は熱可塑性樹脂からなるコア層
とを一体に成形してなるカバー体のコア層の表皮層と接
する側に薄肉凹部として形成されていることを特徴とす
るエアバック用カバー体。[Claims for utility model registration] Claims: 1. An airbag cover body having a fractured portion that breaks when the airbag is deployed, wherein the fractured portion is a skin layer made of a thermoplastic elastomer having a low hardness and a heat layer having a high hardness. A cover body for an airbag, characterized in that a cover body formed by integrally molding a core layer made of a plastic elastomer or a thermoplastic resin is formed as a thin recess on a side of the core layer in contact with the skin layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP029846U JPH0510119U (en) | 1991-04-04 | 1991-04-04 | Air back cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP029846U JPH0510119U (en) | 1991-04-04 | 1991-04-04 | Air back cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0510119U true JPH0510119U (en) | 1993-02-09 |
Family
ID=12287362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP029846U Pending JPH0510119U (en) | 1991-04-04 | 1991-04-04 | Air back cover |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0510119U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006011461A1 (en) * | 2004-07-27 | 2006-02-02 | Jsr Corporation | Shock absorber, shock absorption laminate structure, shock absorption laminate structure for liquid crystal display, shock absorption laminate structure for plasma display, shock absorption laminate structure for organic electroluminescece display and display apparatus |
| JP2015202746A (en) * | 2014-04-11 | 2015-11-16 | ダイキョーニシカワ株式会社 | Vehicular interior article having airbag door part |
-
1991
- 1991-04-04 JP JP029846U patent/JPH0510119U/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006011461A1 (en) * | 2004-07-27 | 2006-02-02 | Jsr Corporation | Shock absorber, shock absorption laminate structure, shock absorption laminate structure for liquid crystal display, shock absorption laminate structure for plasma display, shock absorption laminate structure for organic electroluminescece display and display apparatus |
| JPWO2006011461A1 (en) * | 2004-07-27 | 2008-07-31 | Jsr株式会社 | Shock absorber, shock absorbing laminated structure, shock absorbing laminated structure for liquid crystal display, shock absorbing laminated structure for plasma display, shock absorbing laminated structure for organic electroluminescent display and display device |
| JP2015202746A (en) * | 2014-04-11 | 2015-11-16 | ダイキョーニシカワ株式会社 | Vehicular interior article having airbag door part |
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