JPH0692196A - Pad for air bag device - Google Patents

Pad for air bag device

Info

Publication number
JPH0692196A
JPH0692196A JP4246803A JP24680392A JPH0692196A JP H0692196 A JPH0692196 A JP H0692196A JP 4246803 A JP4246803 A JP 4246803A JP 24680392 A JP24680392 A JP 24680392A JP H0692196 A JPH0692196 A JP H0692196A
Authority
JP
Japan
Prior art keywords
pad
groove
air bag
bag device
upper wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP4246803A
Other languages
Japanese (ja)
Other versions
JP3060746B2 (en
Inventor
Sunao Yamamoto
直 山本
Koji Shiraki
幸司 白木
Suzuaki Hongou
鈴昭 本郷
Hiroyuki Ogawa
裕之 小川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyoda Gosei Co Ltd
Original Assignee
Toyoda Gosei Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyoda Gosei Co Ltd filed Critical Toyoda Gosei Co Ltd
Priority to JP4246803A priority Critical patent/JP3060746B2/en
Priority to KR1019930012254A priority patent/KR960016817B1/en
Priority to EP19930114079 priority patent/EP0588176B1/en
Priority to DE1993622337 priority patent/DE69322337T2/en
Publication of JPH0692196A publication Critical patent/JPH0692196A/en
Application granted granted Critical
Publication of JP3060746B2 publication Critical patent/JP3060746B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/205Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in dashboards
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To provide a pad for an air bag device where the core layer is separately formed, the insert forming is unnecessary, a manufacturing man-hour can be greatly reduced, and an injection forming die can be simple. CONSTITUTION:In a constitution where a pad covers the upper surface of an air bag device 11, and unfolding groove parts 19 to unfold the upper wall part 17 by the rupture of the pad body 13 when an air bag 15 is swollen are continuously provided, the pad body 13 is composed of the thermo-plastic elastomer (TPE) having the low temperature tensile strength TB (-35 deg.C): 200-500kgf/cm<2>, and the single layer is formed so that the average wall thickness of the upper wall part may be 2.5-6.0mm. The residual wall thickness (t) of the unfolding groove part 19 is 0.3-1.5mm, and the groove angle alpha on the rear side is 30-90 deg..

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、自動車のステアリング
ホイールや、助手席前方のインストルメントパネルに装
着されるエアバッグ装置の上面を覆うパッドに関し、特
に、生産性良好に製造可能な熱可塑性エラストマー(T
PE)の単層成形体であるエアバッグ装置用パッドに関
する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pad for covering an upper surface of an airbag device mounted on a steering wheel of an automobile or an instrument panel in front of a passenger seat, and more particularly to a thermoplastic elastomer which can be manufactured with good productivity. (T
The present invention relates to a pad for an airbag device, which is a single layer molded body of PE).

【0002】[0002]

【従来の技術】従来のエアバッグ装置用パッドは、通
常、下記のようにして製造していた。
2. Description of the Related Art Conventional air bag device pads are usually manufactured as follows.

【0003】上記パッドは、通常、発泡処方の反応射出
成形(RIM)用ポリウレタン材料を使用し、ネットイ
ンサートを埋設して射出成形して製造をする。このネッ
トインサートは、エアバッグ作動時、パッド上壁部を補
強するためである。
[0003] The above-mentioned pad is usually manufactured by using a polyurethane material for reaction injection molding (RIM) having a foaming formulation, in which a net insert is embedded and injection molding is performed. This net insert is for reinforcing the upper wall portion of the pad when the airbag is operated.

【0004】しかし、この製造方法の場合は、ネット
インサートを使用するため、そのセット作業が必要で、
生産工数がかさむ、RIM成形に使用するポリウレン
タン材料は、熱硬化性であるため、材料のリサイクルが
できない、等の問題点が発生した。
However, in the case of this manufacturing method, since the net insert is used, the setting work is required,
Since the number of production steps is large, and the polyurethane material used for RIM molding is thermosetting, there are problems such that the material cannot be recycled.

【0005】このため、例えば、特開平3−18925
2号公報等で、軟質の第一樹脂材料(スチレン系TP
E)材料で形成されてなる表皮層と、第一樹脂材料より
硬質の第二樹脂材料(オレフィン系樹脂)で形成されて
なるコア層とが一体成形されてなるパッドが提案されて
いる。
Therefore, for example, Japanese Unexamined Patent Publication No. 3-18925.
No. 2, etc., a soft first resin material (styrene-based TP
A pad has been proposed in which a skin layer formed of E) material and a core layer formed of a second resin material (olefin resin) harder than the first resin material are integrally molded.

【0006】[0006]

【発明が解決しようとする課題】しかし、上記構成のパ
ッドの場合、コア層を別体成形しておいて、コア層をイ
ンサートとして表皮層を後からインサート成形等をする
必要があり、製造工数が嵩むとともに、インサート成形
のため金型構造も複雑となった。
However, in the case of the pad having the above structure, it is necessary to separately mold the core layer, and then insert-mold the skin layer with the core layer as an insert. In addition, the mold structure became complicated due to insert molding.

【0007】本発明は、上記にかんがみて、コア層を別
体成形しておいて、インサート成形する必要がなく、製
造工数が大幅に削減可能であるとともに、射出成形金型
も簡単となるエアバッグ装置用パッドを提供することを
目的とする。
In view of the above, according to the present invention, it is not necessary to separately form the core layer and insert-mold it, the number of manufacturing steps can be greatly reduced, and the injection molding die can be simplified. An object is to provide a pad for a bag device.

【0008】[0008]

【課題を解決するための手段】本発明に係るエアバッグ
装置用パッドは、上記課題を、下記構成により解決する
ものである。
An air bag device pad according to the present invention solves the above problems by the following constitution.

【0009】エアバッグ装置の上面を覆うパッドであっ
て、パッド本体が、エアバッグ膨出時に破断して上壁部
を展開可能とする展開用溝部を連続的に備えている構成
において、前記パッド本体が、低温引張強度TB (−3
5 ℃):200〜500kgf/cm2 (19.6〜49
MPa)の熱可塑性エラストマー(TPE)で、上壁部平
均肉厚が2.5〜6mmとなるように単層成形されてな
り、前記展開用溝部の残存肉厚が0.3〜1.5mm、か
つ、裏側開先角度が30〜90°である、ことを特徴と
する。
A pad for covering the upper surface of an airbag device, wherein the pad body is continuously provided with a deployment groove portion that breaks when the airbag is inflated and allows the upper wall portion to be deployed. The main body has a low temperature tensile strength T B (-3
5 ° C.): 200 to 500 kgf / cm 2 (19.6 to 49)
(MPa) thermoplastic elastomer (TPE), which is formed as a single layer so that the average wall thickness of the upper wall is 2.5 to 6 mm, and the residual wall thickness of the developing groove is 0.3 to 1.5 mm. And, the back side groove angle is 30 to 90 °.

【0010】[0010]

【実施例】次に、本発明の実施例を、図例に基づいて説
明をする。
EXAMPLES Next, examples of the present invention will be described with reference to the drawings.

【0011】A.まず、基本構成について説明をする。A. First, the basic configuration will be described.

【0012】即ち、エアバッグ装置11の上面を覆うパ
ッドであって、パッド本体13が、エアバッグ15の膨
出時に破断して上壁部17を展開可能とする展開用溝部
19を連続的に備えている構成である。ここで、展開用
溝部19の全体連続形状は、特に限定されないが、通
常、図3に示すごとくH字形状とされている。
That is, the pad body 13 for covering the upper surface of the airbag device 11 is continuously provided with a deployment groove portion 19 which is broken when the airbag 15 is inflated so that the upper wall portion 17 can be deployed. This is the configuration provided. Here, the entire continuous shape of the expansion groove portion 19 is not particularly limited, but is generally H-shaped as shown in FIG.

【0013】B.上記構成において、本発明は下記特徴
的構成を具備する。
B. In the above structure, the present invention has the following characteristic structures.

【0014】(1) 第一の特徴的態様は、低温引張強度T
B (−35 ℃):200〜500kgf/cm2 (19.
6〜49 MPa)の熱可塑性エラストマー(TPE)で、
上壁部平均肉厚が2.5〜6mmとなるように単層成形さ
れている。
(1) The first characteristic aspect is low temperature tensile strength T
B (−35 ° C.): 200 to 500 kgf / cm 2 (19.
6-49 MPa) thermoplastic elastomer (TPE),
A single layer is formed so that the average wall thickness of the upper wall is 2.5 to 6 mm.

【0015】ここで、低温引張強度が、上記数値範囲未
満では、常態の許容外力で、該溝部19が破断するおそ
れがあり、また、上記数値範囲を越えると、エアバッグ
膨出時、該溝部が円滑に破断しないおそれがある。
Here, if the low temperature tensile strength is less than the above numerical range, the groove portion 19 may be broken by a normal permissible external force, and if it exceeds the above numerical range, the groove portion is bulged when the airbag is inflated. May not break smoothly.

【0016】また、上壁部平均肉厚が、上記2.5mm未
満では、形状保持能が十分でなく、また、6mmを越える
と、重量が増大して望ましくない。なお、周璧部21の
平均肉厚は、形状保持能等を考慮して、2.5〜6mmと
する共に、通常、図1に示す如く、上壁部17の外周部
裏面と周璧部21の外周との間に複数本の補強リブ23
を適宜形成しておくことが望ましい。
If the average wall thickness of the upper wall is less than 2.5 mm, the shape retaining ability is insufficient, and if it exceeds 6 mm, the weight increases, which is not desirable. The average wall thickness of the peripheral wall portion 21 is set to 2.5 to 6 mm in consideration of the shape retaining ability and the like, and normally, as shown in FIG. 21 and a plurality of reinforcing ribs 23
Is preferably formed as appropriate.

【0017】TPEとしては、上記材料特性を満たせ
ば、特に限定されないが、スチレン系TPE、ポリエス
テル系TPE、等を挙げることができる。
The TPE is not particularly limited as long as it satisfies the above-mentioned material characteristics, but examples thereof include styrene-based TPE and polyester-based TPE.

【0018】(i) 上記スチレン系TPEとしては、それ
ぞれソフトセグメントが、ポリブタジエンであるSBS
系、ポリプレンであるSIS系、ポリオレフィンである
SEBS系、等いずれでも使用可能である。これらの内
で、SEBSが、分子間に二重結合を有せず、耐候性、
耐摩耗性、耐熱性等において優れており、望ましい。具
体的には、「タフテック」(旭化成(株)製)等を使用
可能である。
(I) As the styrene-based TPE, SBS whose soft segment is polybutadiene
It is possible to use any of a silane type, SIS type which is polypropylene, SEBS type which is polyolefin and the like. Among these, SEBS has no intermolecular double bond,
It is desirable because it has excellent wear resistance and heat resistance. Specifically, "Tuftec" (manufactured by Asahi Kasei Co., Ltd.) or the like can be used.

【0019】(ii)上記ポリエステル系TPEとしては、
ハードセグメントをポリブチレンテレフタレート等の
ポリエステルとし、ソフトセグメントを、それぞれ、ポ
リテトラメチレングリコールエーテル(PTMG)、P
TMEGT(PTMGとテレフタル酸との縮合物)等の
ポリエーテルとするポリエステル・ポリエーテル型、
ハードセグメントを上記と同様のポリエステルとし、ソ
フトセグメントをポリカプロラクトン等の脂肪族ポリエ
ステルとするポリエステル・ポリエステル型、いずれで
も使用可能である。
(Ii) The above polyester-based TPE includes
The hard segment is polyester such as polybutylene terephthalate, and the soft segments are polytetramethylene glycol ether (PTMG) and P, respectively.
Polyester / polyether type which is a polyether such as TMEGT (condensation product of PTMG and terephthalic acid),
A polyester / polyester type in which the hard segment is the same polyester as described above and the soft segment is an aliphatic polyester such as polycaprolactone can be used.

【0020】具体的には、「ローモッド」(ゼネラル・
エレクトリック社製)「ハイトレル」(デユポン社
製)、等を使用可能である。
Specifically, "low mod" (general
“Hytrel” (manufactured by Electric Co., Ltd.) (manufactured by Dyupon Co., Ltd.) and the like can be used.

【0021】(2) 第二の特徴的態様は、展開用溝部19
の残存肉厚tを0.3〜1.5mm(望ましくは0.5〜
1mm)とし、かつ、裏側開先角度αを30〜90°(望
ましくは50〜70°)としたことにある。
(2) The second characteristic mode is that the groove portion 19 for expansion is used.
The remaining thickness t of 0.3 to 1.5 mm (preferably 0.5 to
1 mm) and the back side groove angle α is 30 to 90 ° (desirably 50 to 70 °).

【0022】残存肉厚が、0.3mm未満では、常態の許
容外力で、該溝部19が破断するおそれがあり、また、
1.5mmを越えると、エアバッグ膨出時、該溝部19が
円滑に破断しないおそれがある。また、裏側開先角度が
30°未満であると、パッド表面に引けが発生し易く、
90°を越えるとエアバッグ作動時、該溝部が円滑に破
断しないおそれがある。なお、展開用溝部19の表側開
先角度は、上壁部17の展開作用にほとんど影響を与え
ないので、溝形状も開先角度も任意である。
If the residual wall thickness is less than 0.3 mm, the groove portion 19 may be broken by the normal permissible external force, and
If it exceeds 1.5 mm, the groove 19 may not be broken smoothly when the airbag is inflated. If the back groove angle is less than 30 °, shrinkage is likely to occur on the pad surface,
If the angle exceeds 90 °, the groove may not be broken smoothly when the airbag is operated. The front groove angle of the expanding groove portion 19 has almost no influence on the expanding action of the upper wall portion 17, so that the groove shape and the groove angle are arbitrary.

【0023】なお、上壁部展開時にヒンジ部位Hとなる
部位は、エアバッグ膨出時に、展開部が容易に展開する
ように、上壁部17の平均肉厚よりも簿肉、通常、2〜
4mmとしておく。
The portion which becomes the hinge portion H when the upper wall portion is deployed is designed to have a book-like thickness, usually 2 than the average wall thickness of the upper wall portion 17 so that the deployed portion can be easily deployed when the airbag is inflated. ~
Set to 4 mm.

【0024】C.上記パッドの製造方法は、特に限定さ
れないが、例えば、次の様にして行なう。
C. The method for manufacturing the pad is not particularly limited, but is performed as follows, for example.

【0025】成形金型に、上記ポリスチレン系TPEや
ポリエステル系TPEのコンパウンドを成形材料とし射
出成形して製造する。なお、上記において、成形品に
は、必要により、表面には耐候性塗料を塗布して仕上げ
る。
It is manufactured by injection molding a compound of polystyrene TPE or polyester TPE as a molding material into a molding die. In the above, if necessary, the surface of the molded product is coated with a weather resistant coating to finish it.

【0026】D.このパッド13は、ステアリングホイ
ールのボス(図示せず)の上方に配設されたエアバッグ
15が組みつけられたインフレータ25に、リテーナ2
7を介してリベット29止め等により固着して組みつけ
る。
D. The pad 13 is attached to an inflator 25 to which an airbag 15 is mounted above a boss (not shown) of a steering wheel and is attached to a retainer 2
The rivet 29 is fixed via 7 and fixedly assembled.

【0027】[0027]

【発明の作用・効果】本発明のエアバッグ装置用パッド
は、上記のように、TPE材料を低温引張強度を所定範
囲とするとともに、展開用溝部の残存肉厚・下側開先形
状を特定することにより、TPE材料で単層成形して
も、後述の試験例に示す如く、そのパッド膨出時の展開
性能等に問題が発生しない。
In the air bag device pad of the present invention, the low temperature tensile strength of the TPE material is set within a predetermined range as described above, and the remaining wall thickness and the lower groove shape of the deployment groove are specified. As a result, even if a single layer molding is performed using the TPE material, there will be no problem with respect to the spreading performance and the like when the pad is swollen, as shown in the test example described later.

【0028】従って、本発明のエアバッグ装置用パッド
は、従来の如く、コア層を別体成形しておいて、インサ
ート成形する必要がない。従って、製造工数が大幅に削
減可能となるとともに、成形時の金型構造が簡単とな
る。
Therefore, in the air bag device pad of the present invention, it is not necessary to separately form the core layer and insert-mold it as in the conventional case. Therefore, the number of manufacturing steps can be greatly reduced, and the mold structure at the time of molding becomes simple.

【0029】なお、特開平2−171364号公報にお
いて、エアバッグ装置用パッドをTPEで単層成形する
技術的思想が開示されているが、本願発明の如く、TP
Eの材料特性(低温引張強度)を特定範囲に限定する構
成と、展開用溝部の残存肉厚・裏側開先角度を特定範囲
とする構成を結合させて、パッグ膨出時の展開部の展開
性能を維持する思想は、何ら開示若しくは示唆されてい
ない。
Incidentally, Japanese Patent Application Laid-Open No. 2-171364 discloses a technical idea of forming a single layer of a pad for an air bag device by TPE.
The combination of the material property of E (low-temperature tensile strength) limited to a specific range and the configuration in which the remaining wall thickness of the groove for expansion and the groove angle on the back side are within a specific range are combined to expand the expanded portion at the time of bulging No idea of maintaining performance is disclosed or suggested.

【0030】[0030]

【試験例】以下、本発明の効果を確認するために行なっ
た試験例について説明をする。
[Test Example] Hereinafter, a test example performed for confirming the effect of the present invention will be described.

【0031】表1に示す材料を使用して、各実施例・比
較例のパッドを成形した。比較例に使用したTPEは、
いずれもウレタン系で、比較例1は「大日本インキ化学
工業社」製、比較例2は「日本エラストラン社」製であ
る。
The materials shown in Table 1 were used to mold the pads of Examples and Comparative Examples. The TPE used in the comparative example is
Both are urethane type, Comparative Example 1 is made by "Dainippon Ink and Chemicals, Inc." and Comparative Example 2 is made by "Japan Elastollan Co., Ltd."

【0032】また、パッドの仕様は、次の通りである。The specifications of the pad are as follows.

【0033】タイプA…上壁部面積:300cm2 、上壁
部平均肉厚:5mm、展開用溝部残存肉厚:1.0mm、展
開用溝裏側開先角度:60°、 タイプB…上壁部面積:270cm2 、上壁部平均肉厚:
4.5mm、展開用溝部残存肉厚:0.5mm、展開用溝裏
側開先角度:50°、 そして、各パッドを実車に装着するのと同様のエアバッ
グ装置に装備して、表示の各温度でインフレーション試
験を行なった。
Type A: upper wall area: 300 cm 2 , average thickness of upper wall: 5 mm, unfolded groove remaining thickness: 1.0 mm, unfolded groove back side groove angle: 60 °, Type B: upper wall Area: 270 cm 2 , average thickness of top wall:
4.5 mm, remaining thickness of the groove for deployment: 0.5 mm, groove angle on the back side of the groove for deployment: 50 °, and equipped with the same airbag device as each pad is mounted on the actual vehicle, The inflation test was performed at temperature.

【0034】そして、パッドの展開状態を、目視観察
し、奇麗に展開…○、パッドの一部に亀裂発生…△、パ
ッドが飛散…Χ、とした。その結果を、表示するが、各
実施例は、室温・85℃雰囲気下・−35℃雰囲気下の
全ての項目において、パッド展開性に問題がないが、各
比較例は、−35℃雰囲気において、問題があることが
分かる。
Then, the developed state of the pad was visually observed, and it was neatly developed ... ◯, a crack was generated in part of the pad ... Δ, and the pad was scattered ... Χ. Although the results are shown, in each Example, there is no problem in the pad developability in all items at room temperature / 85 ° C. atmosphere / −35 ° C. atmosphere. , I know there is a problem.

【0035】なお、表1には、各使用材料の物性データ
を参考のために記してある。各物性データは、試験片を
調製して実測したものである。
In Table 1, the physical property data of each material used are shown for reference. Each physical property data is measured by preparing a test piece.

【0036】なお、各物性データの試験法は、それぞ
れ、引張強度(TB ):ASTMD638、引張伸
び(EB ):ASTM D638、アイゾット衝撃強
さ:ASTM D256に、基づいて行ったものであ
る。
[0036] The test method of each physical property data, respectively, tensile strength (T B): ASTM D638, tensile elongation (E B): ASTM D638, Izod impact strength: in ASTM D256, in which was based .

【0037】[0037]

【表1】 [Table 1]

【0038】*)市販品改質材料*) Commercially available reforming material

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一例を示すパッドのエアバッグ装置へ
の装着態様半縦断面図、
FIG. 1 is a semi-longitudinal sectional view showing a manner of mounting a pad on an airbag device according to an example of the present invention;

【図2】図1のII部拡大断面図、FIG. 2 is an enlarged cross-sectional view of part II of FIG.

【図3】図1のパッドの平面図FIG. 3 is a plan view of the pad of FIG.

【符号の説明】[Explanation of symbols]

11 エアバッグ装置 13 パッド本体 15 エアバッグ 17 パッド本体の上壁部 19 展開用溝部 21 パッド本体の周璧部 t 展開用溝部の残存肉厚 α 展開用溝部の裏側開先角度 11 Airbag device 13 Pad body 15 Airbag 17 Upper wall part of pad body 19 Groove for deployment 21 Peripheral wall of pad body t Remaining wall thickness of deployment groove α Angle of backside groove for deployment

───────────────────────────────────────────────────── フロントページの続き (72)発明者 本郷 鈴昭 愛知県西春日井郡春日町大字落合字長畑1 番地 豊田合成株式会社内 (72)発明者 小川 裕之 愛知県西春日井郡春日町大字落合字長畑1 番地 豊田合成株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Suzuaki Hongo No. 1 Nagahata Ochiai, Kasuga-cho, Nishikasugai-gun, Aichi Toyoda Gosei Co., Ltd. Address within Toyoda Gosei Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 エアバッグ装置の上面を覆うパッドであ
って、パッド本体が、エアバッグ膨出時に破断して上壁
部を展開可能とする展開用溝部を連続的に備えている構
成において、 前記パッド本体が、低温引張強度TB (−35 ℃):
200〜500kgf/cm2 (19.6〜49 MPa)の熱
可塑性エラストマーで、上壁部平均肉厚が2.5〜6mm
となるように単層成形されてなり、 前記展開用溝部の残存肉厚が0.3〜1.5mm、かつ、
裏側開先角度が30〜90°である、 ことを特徴とするエアバッグ装置用パッド。
1. A pad for covering an upper surface of an airbag device, wherein the pad main body is continuously provided with a deployment groove portion that is broken when the airbag is inflated to allow deployment of an upper wall portion, The pad body has a low temperature tensile strength T B (−35 ° C.):
200-500 kgf / cm 2 (19.6-49 MPa) thermoplastic elastomer with an average top wall thickness of 2.5-6 mm
Is formed in a single layer so that the remaining groove thickness of the developing groove is 0.3 to 1.5 mm, and
A back side groove angle is 30 to 90 °. A pad for an airbag device, characterized in that:
JP4246803A 1992-09-16 1992-09-16 Pad for airbag device Expired - Fee Related JP3060746B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP4246803A JP3060746B2 (en) 1992-09-16 1992-09-16 Pad for airbag device
KR1019930012254A KR960016817B1 (en) 1992-09-16 1993-07-01 A pad for use in an air big device
EP19930114079 EP0588176B1 (en) 1992-09-16 1993-09-02 A pad for use in an air bag device
DE1993622337 DE69322337T2 (en) 1992-09-16 1993-09-02 Cover for an airbag

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4246803A JP3060746B2 (en) 1992-09-16 1992-09-16 Pad for airbag device

Publications (2)

Publication Number Publication Date
JPH0692196A true JPH0692196A (en) 1994-04-05
JP3060746B2 JP3060746B2 (en) 2000-07-10

Family

ID=17153921

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4246803A Expired - Fee Related JP3060746B2 (en) 1992-09-16 1992-09-16 Pad for airbag device

Country Status (2)

Country Link
JP (1) JP3060746B2 (en)
KR (1) KR960016817B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE39314E1 (en) 1995-03-08 2006-10-03 Trw Inc. Housing assembly for an air bag and vehicle horn switch

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100857885B1 (en) * 2007-05-07 2008-09-10 덕양산업 주식회사 Fabrication method and instrument panel of invisible air bag

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE39314E1 (en) 1995-03-08 2006-10-03 Trw Inc. Housing assembly for an air bag and vehicle horn switch

Also Published As

Publication number Publication date
KR960016817B1 (en) 1996-12-21
KR940002103A (en) 1994-02-16
JP3060746B2 (en) 2000-07-10

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