JPH06227351A - Air bag cover - Google Patents
Air bag coverInfo
- Publication number
- JPH06227351A JPH06227351A JP5016279A JP1627993A JPH06227351A JP H06227351 A JPH06227351 A JP H06227351A JP 5016279 A JP5016279 A JP 5016279A JP 1627993 A JP1627993 A JP 1627993A JP H06227351 A JPH06227351 A JP H06227351A
- Authority
- JP
- Japan
- Prior art keywords
- airbag cover
- air bag
- cover
- airbag
- convex portion
- 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
- 238000002347 injection Methods 0.000 claims abstract description 6
- 239000007924 injection Substances 0.000 claims abstract description 6
- 238000001746 injection moulding Methods 0.000 claims abstract description 4
- 229920003023 plastic Polymers 0.000 claims abstract description 4
- 239000004033 plastic Substances 0.000 claims abstract description 4
- 230000007547 defect Effects 0.000 abstract description 3
- 238000003776 cleavage reaction Methods 0.000 description 3
- 230000007017 scission Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/1703—Introducing an auxiliary fluid into the mould
- B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3005—Body finishings
- B29L2031/3038—Air bag covers
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、エアバッグカバーに関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag cover.
【０００２】[0002]
【従来の技術】エアバッグカバーには、その内部に収納
されたエアバッグが膨張するとき、予め想定したライン
に沿って開裂展開するように薄肉化した破断部が配設さ
れている。2. Description of the Related Art An airbag cover is provided with a thin-walled rupture portion so that when the airbag accommodated therein is inflated, the airbag cover is cleaved and deployed along a preliminarily assumed line.
【０００３】しかし、このようなエアバッグカバーは、
急激な開裂展開時に破断予定ラインを越えて全く意図し
ない方向へ破断ラインが走り、カバー体を飛散させる危
険性がある他、バッグも予定したとおりの方向に確実に
膨張させることが妨げられるおそれがある。この問題へ
の対応策として、破断予定ラインを越える破断が生じる
のを防ぐ手段としては、予定破断ラインに沿って厚肉部
を設けることが提案されている（実開平１−８３６５
２）。However, such an airbag cover is
There is a risk that the breaking line will run in an unintended direction beyond the planned breaking line at the time of rapid cleavage expansion, causing the cover body to scatter, and that the bag may be prevented from inflating reliably in the planned direction. is there. As a measure against this problem, it has been proposed to provide a thick wall portion along the planned break line as a means for preventing the break beyond the planned break line (Actual Kaihei 1-8365).
2).
【０００４】[0004]
【発明が解決しようとする課題】上記提案のように破断
ラインに沿って厚肉部を配設することにより、バッグ展
開時の破断は一般の破断予定ラインでは想定どおりにコ
ントロールすることができる。By arranging the thick portion along the breaking line as proposed above, the breaking at the time of bag deployment can be controlled as expected on a general breaking line.
【０００５】しかしながら、上記の提案のように薄肉に
形成される破断ラインに沿って厚肉部を形成するとその
肉厚差のために成形の際にヒケの発生を避けることがで
きず、エアバッグカバーの外観が劣ったものとなる。However, when the thick portion is formed along the breaking line formed thin as in the above proposal, it is impossible to avoid the occurrence of sink marks during the molding due to the difference in the thickness, and the airbag The appearance of the cover will be inferior.
【０００６】エアバッグカバーは、通常ステアリングホ
イールやインストルーメントパネルに装着されるので、
その表面の外観が損われるのは大きな問題点であるか
ら、前記の目的を達成できるような所望の厚肉部を形成
することはこの外観上の問題点からみて実際上困難であ
る。さらに、破断ラインの終端部にはカバーの急激な展
開により慣性力が作用するため、この終端部においては
破断方向をコントロールすることはできず、カバーある
いはその小片が飛散するおそれもある。Since the airbag cover is usually attached to the steering wheel or the instrument panel,
Since it is a big problem that the appearance of the surface is impaired, it is practically difficult to form a desired thick portion capable of achieving the above-mentioned object from the viewpoint of the appearance. Furthermore, since the inertial force acts on the terminal end of the breaking line due to the rapid expansion of the cover, the breaking direction cannot be controlled at the terminal end, and the cover or its small pieces may scatter.
【０００７】本発明はこうした実情の下にエアバッグ展
開時に予定破断ラインにて確実に安全に開裂することが
でき、しかもカバー表面外観に欠陥がなく、かつ軽量化
したエアバッグカバーを提供することを目的とするもの
である。Under the above circumstances, the present invention provides a lightweight airbag cover that can be securely and safely cleaved at the planned break line when the airbag is deployed, and has no defect in the surface appearance of the cover. The purpose is.
【０００８】[0008]
【課題を解決するための手段】本発明者は、鋭意検討し
た結果、エアバッグカバーの予定破断ラインに沿って中
空とした凸部を配設することで前記課題を解決し得るこ
とを知見し、本発明を完成するに至った。As a result of intensive studies, the present inventor has found that the above-mentioned problems can be solved by disposing a hollow convex portion along the planned break line of the airbag cover. The present invention has been completed.
【０００９】すなわち、本発明は内部に収納したエアバ
ッグの膨張時に破断する破断部を表面に有し、プラスチ
ックの射出成形によりつくられるエアバッグカバーにお
いて、該破断部に沿ってガス注入による中空凸部を配設
したエアバッグカバーをその要旨とするものである。That is, according to the present invention, an airbag cover made by injection molding of a plastic has a rupture portion on its surface which ruptures when the airbag housed therein is inflated, and a hollow convex formed by gas injection along the rupture portion. The gist of the invention is an airbag cover provided with parts.
【００１０】本発明を図面に基づいて説明する。図１，
２は本発明のエアバッグカバーの実施例を示す平面図で
図１は表面、図２は裏面である。図３は図２におけるＡ
−Ａ断面図、図４は同Ｂ−Ｂ断面図である。また図５は
本発明のエアバッグカバーの全体斜視図である。The present invention will be described with reference to the drawings. Figure 1,
2 is a plan view showing an embodiment of the airbag cover of the present invention. FIG. 1 is a front surface and FIG. 2 is a back surface. FIG. 3 shows A in FIG.
-A sectional drawing, FIG. 4 is the same BB sectional drawing. FIG. 5 is an overall perspective view of the airbag cover of the present invention.
【００１１】図中１はエアバッグカバー、２は破断部、
３は破断部にて開裂するリッド、４は破断部に沿って配
設された中空凸部、５はヒンジ、６は破断部終端部７を
さえぎるように形成した中空凸部延長部である。In the figure, 1 is an airbag cover, 2 is a fractured part,
Reference numeral 3 denotes a lid that is cleaved at the breaking portion, 4 is a hollow convex portion arranged along the breaking portion, 5 is a hinge, and 6 is a hollow convex portion extending portion formed so as to block the breaking terminal end 7.
【００１２】本発明のエアバッグカバーは上記のように
射出成形の際ガス注入により破断部に沿って中空の凸部
４を設けたことが重要である。In the airbag cover of the present invention, it is important that the hollow convex portion 4 is provided along the broken portion by the gas injection during the injection molding as described above.
【００１３】ガス注入法により成形中プラスチックを金
型に押しつけるようにして成形するため該中空凸部にお
いてヒケの発生を解消することができるので、外観に欠
陥はなく見栄えのよいエアバックカバーとすることがで
きる。また、ヒケの発生を考慮しなくてよいので、該中
空凸部を厚肉に形成することもでき、それだけリッドの
破断部周辺の剛性をさらに増大することが可能となり以
下に示す作用を一層向上させることができる。Since the plastic is pressed against the mold during molding by the gas injection method, it is possible to eliminate the occurrence of sink marks in the hollow convex portion, so that the airbag cover has a good appearance and no defects. be able to. Further, since it is not necessary to consider the occurrence of sink marks, it is possible to form the hollow convex portion to be thick, and it is possible to further increase the rigidity around the fractured portion of the lid, and further improve the action described below. Can be made.
【００１４】すなわち、該中空凸部の配設によりエアバ
ッグカバーは想定したとおりのラインにて一層安全、確
実に開裂することができ、意図しない方向への開裂は防
止することができる。これは前述のように破断部に沿っ
て設けた中空凸部によりリッドの破断部周辺の剛性を著
しく向上することができるので、バッグ展開時の応力を
破断部に集中することができ開裂をより円滑に行うこと
ができるからである。したがって、破断部の肉厚を開裂
性に何ら支障を来すことなくやや厚めに設定することが
でき、後記する破断部の盛上りによる変形を防止するこ
とができる。しかも、中空凸部の配設による破断部周辺
でのリッドの剛性の向上は、またリッドの肉厚を従来の
ものよりもさらに薄肉化することを可能とし、この薄肉
化は凸部の中空化とともにエアバッグカバーの軽量化に
寄与するものである。すなわち、エアバッグカバー内に
はバッグが折りたたまれて密に押し込まれているため、
その反発力がリッドや破断部に作用している。そのため
に薄肉の破断部が盛上るように変形することがあり、エ
アバッグカバー表面部の美観を損ねるので、これを防止
するため従来はリッド部に剛性を保持させる必要上リッ
ドをあまり薄肉に形成することはできなかったものであ
る。しかし、本発明のエアバッグカバーにおいては破断
部の厚みをやや厚く０．８〜１ｍｍとして盛上り変形を
防止し、一方、リッドの肉厚を薄く１．５〜２．５ｍｍ
とすることができるので、安全性、外観等に影響を及ぼ
すことなくエアバッグの軽量化を実現することができ
る。That is, by disposing the hollow convex portion, the airbag cover can be more safely and surely cleaved in the line as expected, and the cleaving in an unintended direction can be prevented. This is because the rigidity around the fractured part of the lid can be remarkably improved by the hollow convex portion provided along the fractured part as described above, so that the stress at the time of bag deployment can be concentrated on the fractured part and the tearing can be further suppressed. This is because it can be performed smoothly. Therefore, the wall thickness of the fractured portion can be set to be slightly thicker without causing any trouble in the cleavability, and it is possible to prevent the deformation of the fractured portion, which will be described later, due to rising. Moreover, the rigidity of the lid around the fractured part can be improved by the provision of the hollow convex portion, and the wall thickness of the lid can be made thinner than the conventional one, and this thinning makes the convex portion hollow. At the same time, it contributes to the weight reduction of the airbag cover. That is, since the bag is folded and pressed tightly inside the airbag cover,
The repulsive force acts on the lid and the broken part. As a result, the thin fractured part may be deformed so as to rise, which impairs the aesthetic appearance of the airbag cover surface. I couldn't do it. However, in the airbag cover of the present invention, the thickness of the fractured portion is made slightly thicker to 0.8 to 1 mm to prevent swelling deformation, while the thickness of the lid is made thinner to 1.5 to 2.5 mm.
Therefore, the weight of the airbag can be reduced without affecting safety and appearance.
【００１５】[0015]
【実施例】図１〜３は、本発明のエアバッグカバーの実
施例を示すものである。この実施例においては破断部２
の終端部においてこれをさえぎるように中空凸部の延長
部６を設けたものである。1 to 3 show an embodiment of an airbag cover according to the present invention. In this embodiment, the break 2
The extension 6 of the hollow convex portion is provided so as to block the end of the hollow convex portion.
【００１６】この延長部を設けることにより本発明のエ
アバッグカバーの開裂はさらに安全確実なものとするこ
とができる。すなわち、この開裂は内部に収納されたバ
ッグの急激な膨張により生じるものであり、したがっ
て、その開裂の際の慣性力が破断部２の終端部７に及
び、この点を越えてさらにコントロールできない破断が
生じて場合によってはカバーが飛散するおそれがある
が、本発明のエアバッグカバーにおいては前記中空凸部
の延長部を配設した場合にはこのような不安も解消する
ことができる。By providing this extension portion, the tearing of the airbag cover of the present invention can be made safer and more reliable. That is, this cleavage is caused by the rapid expansion of the bag housed inside, so that the inertial force at the time of the cleavage reaches the terminal end 7 of the fractured portion 2 and beyond this point, the fracture cannot be controlled further. However, in the airbag cover of the present invention, such anxiety can be eliminated when the extended portion of the hollow convex portion is provided in the airbag cover of the present invention.
【００１７】[0017]
【発明の効果】以上説明したように、本発明は破断部に
沿ってガス注入法による中空凸部を配設したことによ
り、該凸部にヒケの発生を解消できるため、エアバッグ
カバーの外観を損ねることなく該凸部を厚肉としてリッ
ド周縁の剛性を著しく高めることができる。したがっ
て、エアバッグ展開時にその応力を一層破断部に集中す
ることができるので、破断部の開裂は非常に円滑とな
り、予定破断ラインにて安全、確実に行うことができ、
エアバッグもまた設計どおりに円滑に展開することがで
きる。As described above, according to the present invention, since the hollow convex portion formed by the gas injection method is arranged along the fractured portion, the occurrence of sink marks on the convex portion can be eliminated, so that the appearance of the airbag cover can be eliminated. It is possible to remarkably increase the rigidity of the periphery of the lid by making the convex portion thick without damaging the protrusion. Therefore, when the airbag is deployed, the stress can be further concentrated on the rupture portion, so that the rupture portion can be cracked very smoothly and safely and reliably at the planned rupture line.
The airbag can also be deployed smoothly as designed.
【００１８】しかも、前記の剛性の向上により開裂性に
支障を来すことなく破断部の肉厚をやや厚めに形成でき
るので、この部分の変形を防止するとともに一方、リッ
ドの厚みを外観、安全性に影響を及ぼすことなく薄肉化
することができるので、凸部の中空化と相俟ってエアバ
ッグカバーを軽量化することができる。Moreover, since the rigidity is increased, the wall thickness of the fractured portion can be formed to be slightly thicker without affecting the cleavability, so that the deformation of this portion can be prevented and the thickness of the lid can be improved in appearance and safety. Since the thickness can be reduced without affecting the property, the weight of the airbag cover can be reduced in combination with the hollowing of the convex portion.
【図１】本発明の実施例を示す表面説明図、FIG. 1 is a surface explanatory view showing an embodiment of the present invention,
【図２】同裏面説明図、FIG. 2 is a back side explanatory view of the same,
【図３】図２Ａ−Ａ線断面説明図、FIG. 3 is a cross-sectional explanatory view taken along the line AA of FIG.
【図４】図２Ｂ−Ｂ線断面説明図、FIG. 4 is a cross-sectional explanatory view taken along the line BB of FIG.
【図５】本発明の実施例を示す全体斜視図。FIG. 5 is an overall perspective view showing an embodiment of the present invention.
１ エアバッグカバー ２ 破断部 ３ リッド ４ 中空凸部 ５ ヒンジ ６ 中空凸部延長部 ７ 破断部終端部 1 Airbag Cover 2 Broken Part 3 Lid 4 Hollow Convex Part 5 Hinge 6 Hollow Convex Part Extended Part 7 Broken Part Termination Part
Claims (2)
断する破断部を有し、プラスチックの射出成形によりつ
くられるエアバッグカバーにおいて、該破断部に沿って
ガス注入による中空凸部を配設したことを特徴とするエ
アバッグカバー。1. An airbag cover made by injection molding of plastic, which has a rupture portion that ruptures when the airbag housed therein is inflated, and a hollow convex portion formed by gas injection is disposed along the rupture portion. An airbag cover that is characterized.
部に延長部を形成したことを特徴とする請求項１記載の
エアバッグカバー。2. The airbag cover according to claim 1, wherein an extension portion is formed in the hollow convex portion so as to block an end portion of the fractured portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5016279A JPH06227351A (en) | 1993-02-03 | 1993-02-03 | Air bag cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5016279A JPH06227351A (en) | 1993-02-03 | 1993-02-03 | Air bag cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06227351A true JPH06227351A (en) | 1994-08-16 |
Family
ID=11912114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5016279A Pending JPH06227351A (en) | 1993-02-03 | 1993-02-03 | Air bag cover |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06227351A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999065739A1 (en) * | 1998-06-19 | 1999-12-23 | Textron Automotive Company Inc. | Integral airbag door configuration |
| WO1999065738A1 (en) * | 1998-06-19 | 1999-12-23 | Textron Automotive Company Inc. | Apparatus for deploying an air bag through a hard panel |
| US6203056B1 (en) * | 1997-06-09 | 2001-03-20 | Textron Automotive Company Inc. | Apparatus for deploying an airbag through a hard panel |
| WO2001079040A1 (en) * | 2000-04-18 | 2001-10-25 | Textron Automotive Company Inc | Inflatable restraint apparatus |
| US6533312B1 (en) * | 1997-06-09 | 2003-03-18 | Textron Automotive Company, Inc. | Inflatable restraint apparatus |
| US6955376B1 (en) | 1997-06-09 | 2005-10-18 | Collins & Aikman Products Co. | Apparatus for deploying an air bag through a hard panel |
| JP2007112420A (en) * | 2005-09-21 | 2007-05-10 | Daikyoo Nishikawa Kk | Interior parts for vehicles with airbag doors |
-
1993
- 1993-02-03 JP JP5016279A patent/JPH06227351A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6203056B1 (en) * | 1997-06-09 | 2001-03-20 | Textron Automotive Company Inc. | Apparatus for deploying an airbag through a hard panel |
| US6457738B1 (en) | 1997-06-09 | 2002-10-01 | Textron Automotive Company, Inc. | Inflatable restraint apparatus |
| US6533312B1 (en) * | 1997-06-09 | 2003-03-18 | Textron Automotive Company, Inc. | Inflatable restraint apparatus |
| US6955376B1 (en) | 1997-06-09 | 2005-10-18 | Collins & Aikman Products Co. | Apparatus for deploying an air bag through a hard panel |
| WO1999065739A1 (en) * | 1998-06-19 | 1999-12-23 | Textron Automotive Company Inc. | Integral airbag door configuration |
| WO1999065738A1 (en) * | 1998-06-19 | 1999-12-23 | Textron Automotive Company Inc. | Apparatus for deploying an air bag through a hard panel |
| US6260875B1 (en) | 1998-06-19 | 2001-07-17 | Textron Automotive Company | Seamless/integral DSIR or PSIR door configuration in hard plastic trim application facilitated by gas |
| WO2001079040A1 (en) * | 2000-04-18 | 2001-10-25 | Textron Automotive Company Inc | Inflatable restraint apparatus |
| JP2007112420A (en) * | 2005-09-21 | 2007-05-10 | Daikyoo Nishikawa Kk | Interior parts for vehicles with airbag doors |
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