JP2946771B2 - Airbag device - Google Patents

Airbag device

Info

Publication number
JP2946771B2
JP2946771B2 JP3010789A JP1078991A JP2946771B2 JP 2946771 B2 JP2946771 B2 JP 2946771B2 JP 3010789 A JP3010789 A JP 3010789A JP 1078991 A JP1078991 A JP 1078991A JP 2946771 B2 JP2946771 B2 JP 2946771B2
Authority
JP
Japan
Prior art keywords
bag
occupant
main
sub
exhaust hole
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.)
Expired - Fee Related
Application number
JP3010789A
Other languages
Japanese (ja)
Other versions
JPH04244453A (en
Inventor
英雄 上妻
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP3010789A priority Critical patent/JP2946771B2/en
Publication of JPH04244453A publication Critical patent/JPH04244453A/en
Application granted granted Critical
Publication of JP2946771B2 publication Critical patent/JP2946771B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/233—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other
    • B60R2021/23324—Inner walls crating separate compartments, e.g. communicating with vents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/239—Inflatable members characterised by their venting means

Landscapes

  • Air Bags (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】この発明は、車両等の座席前方に
配置され、衝突時にバッグ本体を膨張、展開し、乗員を
拘束して二次衝突を防止するエアバッグ装置に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag apparatus which is disposed in front of a seat of a vehicle or the like, inflates and deploys a bag body at the time of a collision, restrains an occupant, and prevents a secondary collision.

【０００２】[0002]

【従来の技術】エアバッグ装置は周知のように車両等の
衝突時に衝突センサの感知作用にもとづいてインフレー
タを作動させ、該インフレータからの発生ガスによりバ
ッグ本体を膨張させて、該バッグ本体を急速展開させ
て、衝突時に前方へ慣性移動する乗員を拘束させるもの
である。ところで、このようなエアバッグ装置にあって
は、バッグ本体の内圧が一定であると、低速衝突時には
乗員拘束の際にバッグ本体が固すぎて乗員への反応が大
となり、逆に高速衝突時には乗員拘束の際にバッグ本体
の圧縮ストロークが大きすぎるという事態が生じる。こ
のようなことから、例えば実開昭６１−２０４８５５号
公報に示されているように、バッグ本体を膨張，展開さ
せるインフレータとして、低速衝突時に作動する低速用
インフレータと、高速衝突時に作動する高速用インフレ
ータとを設け、低速衝突，高速衝突の際に、それぞれ専
用のインフレータを作動させるようにしたものが知られ
ている。2. Description of the Related Art As is well known, an airbag device operates an inflator based on the sensing action of a collision sensor at the time of a collision of a vehicle or the like, and inflates the bag body by gas generated from the inflator to rapidly move the bag body. It is deployed to restrain an occupant who inertia moves forward during a collision. By the way, in such an airbag device, when the internal pressure of the bag body is constant, the response to the occupant becomes large due to the bag body being too stiff when restraining the occupant during a low-speed collision, and conversely, during a high-speed collision. When the occupant is restrained, a situation occurs where the compression stroke of the bag body is too large. For this reason, as shown in, for example, Japanese Utility Model Application Laid-Open No. 61-204855, a low-speed inflator that operates at a low-speed collision and a high-speed inflator that operates at a high-speed collision are used as inflators for inflating and expanding the bag body. 2. Description of the Related Art There is known an inflator in which a dedicated inflator is operated at the time of a low-speed collision or a high-speed collision, respectively.

【０００３】[0003]

【発明が解決しようとする課題】エアバッグユニットに
低速用インフレータと高速用インフレータとを配設しよ
うとすると、エアバッグユニットが大型化してしまうこ
とは免れず、このため、特に自動車用エアバッグ装置と
して、エアバッグユニットをステアリングホイールに配
設する場合に、配設スペースの確保が難しく、レイアウ
トに支障を来してしまう。When an airbag unit is provided with a low-speed inflator and a high-speed inflator, the airbag unit is inevitably increased in size. In the case where the airbag unit is arranged on the steering wheel, it is difficult to secure an arrangement space, which hinders the layout.

【０００４】そこでこの発明は、エアバッグユニットの
大型化を伴うことがなく、かつ衝突速度に応じてバッグ
本体の内圧を乗員の拘束に適した圧力に設定することが
できるエアバッグ装置を提供するものである。Accordingly, the present invention provides an airbag device that does not involve an increase in the size of the airbag unit and that can set the internal pressure of the bag body to a pressure suitable for restraining an occupant in accordance with the collision speed. Things.

【０００５】[0005]

【課題を解決するための手段】バッグ本体が隔壁により
前方側のメインバッグと乗員に対面する側のサブバッグ
とに区画形成され、上記隔壁には、サブバッグ側からメ
インバッグ側のガスの流出を阻止する逆止弁が設けら
れ、上記サブバッグに連通してメインバッグの排気孔の
外縁を形成し、乗員とサブバッグとの干渉の度合に応じ
て膨張し排気孔を縮径する調整バッグが設けられてい
る。A bag body is defined by a partition into a main bag on the front side and a sub-bag on the side facing the occupant, and gas flows from the sub-bag side to the main bag side in the partition. A check valve that is provided with a check valve for preventing the air from leaking out, forms an outer edge of the exhaust hole of the main bag in communication with the subbag, and expands according to the degree of interference between the occupant and the subbag to reduce the diameter of the exhaust hole. Is provided.

【０００６】[0006]

【作用】高速衝突時等に乗員がエアバッグ本体のサブバ
ッグと激しく干渉すると、サブバッグ内圧力がメインバ
ッグ内圧力よりも大きくなり、隔壁の逆止弁が閉じるた
め、サブバッグ内圧力により調整バッグが膨張してメイ
ンバッグの排気孔を縮径させる。したがって排気孔から
流出するガスは絞られ、バッグ本体は硬い特性となる。[Function] If the occupant violently interferes with the subbag of the airbag body during a high-speed collision, etc., the pressure in the subbag becomes larger than the pressure in the main bag, and the check valve in the partition closes. The bag expands and reduces the diameter of the exhaust hole in the main bag. Therefore, the gas flowing out from the exhaust hole is restricted, and the bag body has hard characteristics.

【０００７】一方、低速衝突時等に乗員がエアバッグ本
体のサブバッグと干渉すると、メインバッグ内よりも圧
力が高くなったサブバッグ内の圧力によって隔壁の逆止
弁が閉じ、かつ調整バッグが膨張するが、サブバッグ内
圧力がさほど高くないため調整バッグの膨張は少なく、
メインバッグの排気孔の縮径の度合が小さくなり、した
がって排気孔から流出するガスは多くなってバッグ本体
は軟らかい特性となる。On the other hand, when the occupant interferes with the subbag of the airbag body at the time of a low-speed collision or the like, the check valve of the partition wall is closed by the pressure in the subbag which is higher than the pressure in the main bag, and the adjustment bag is opened. Inflates, but the inflation of the adjustment bag is small because the pressure inside the subbag is not so high,
The degree of diameter reduction of the exhaust hole of the main bag is reduced, so that more gas flows out of the exhaust hole, and the bag body has a soft characteristic.

【０００８】[0008]

【実施例】以下、この発明の一実施例を自動車のエアバ
ッグ装置を例にして図面と共に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings, taking an airbag device for a vehicle as an example.

【０００９】図１，２において、１はバッグ本体であっ
て、自動車のステアリングホイール２の図外のカバーパ
ッド内に収納されるもので、ステアリングホイール２側
には周知のインフレータ３が取付けられている。In FIGS. 1 and 2, reference numeral 1 denotes a bag body, which is housed in a cover pad (not shown) of a steering wheel 2 of an automobile. A well-known inflator 3 is attached to the steering wheel 2 side. I have.

【００１０】バッグ本体１は隔壁４により前方側として
のステアリングホイール２側のメインバッグ５と乗員に
対面する側のサブバッグ６とに区画形成されている。The bag body 1 is divided by a partition 4 into a main bag 5 on the steering wheel 2 side as a front side and a sub-bag 6 on the side facing the occupant.

【００１１】上記隔壁４にはメインバッグ５からサブバ
ッグ６へのガスの流入を許容するが、サブバッグ６から
メインバッグ５へのガスの流入は阻止する逆止弁７が２
箇所設けられている。The partition 4 is provided with a check valve 7 for allowing gas to flow from the main bag 5 to the subbag 6 but for preventing gas from flowing from the subbag 6 to the main bag 5.
It is provided in places.

【００１２】逆止弁７は隔壁４に形成された孔８の周囲
に樹脂製等の弁座９を取付け、更にこの弁座９に当接可
能な弁本体１０を装着し、この弁本体１０を覆うように
して通気孔１１を有する固定用袋１３を孔８の周囲に取
付けたものである。The check valve 7 is provided with a valve seat 9 made of resin or the like around a hole 8 formed in the partition wall 4, and further mounted with a valve body 10 which can contact the valve seat 9. A fixing bag 13 having a ventilation hole 11 is attached around the hole 8 so as to cover the hole 8.

【００１３】そして、上記サブバッグ６にはメインバッ
グ５の排気孔１４の外縁を形成する環状の調整バッグ１
５が導入管１６を介して連通接続されている。The sub-bag 6 has an annular adjustment bag 1 forming an outer edge of the exhaust hole 14 of the main bag 5.
5 is connected through an inlet pipe 16.

【００１４】調整バッグ１５はサブバッグ６内の圧力、
即ち、車両前面衝突時における衝突速度や乗員がシート
ベルトを着用しているかどうかによって異なる乗員干渉
時のサブバッグ６内圧力に応じて膨張するように構成さ
れていて、この調整バッグ１５が膨張する程メインバッ
グ５の排気孔１４を縮径させ、排出ガス量を絞るように
なっている。The adjustment bag 15 controls the pressure in the sub-bag 6,
In other words, the adjustment bag 15 is inflated in accordance with the collision speed at the time of a frontal collision of the vehicle and the pressure in the sub-bag 6 at the time of occupant interference which differs depending on whether or not the occupant is wearing a seat belt. As the diameter of the exhaust hole 14 of the main bag 5 is reduced, the amount of exhaust gas is reduced.

【００１５】尚、上記導入管１６には調整バッグ１５内
のガスがサブバッグ６内へ逆流しないよう球状の逆止弁
１７が設けられている。The introduction pipe 16 is provided with a spherical check valve 17 so that the gas in the adjustment bag 15 does not flow back into the sub-bag 6.

【００１６】上記実施例のエアバッグ装置によれば、車
両前面衝突時に車両の減速度が所定値を超えると、図外
のセンサによりインフレータ３が速やかに作動し、イン
フレータ３から発生するガス圧によりバッグ本体１は、
図外のカバーパッドの破壊を伴って急速に膨張、展開す
る。According to the airbag apparatus of the above embodiment, when the deceleration of the vehicle exceeds a predetermined value at the time of a vehicle frontal collision, the inflator 3 is quickly operated by a sensor (not shown) and the gas pressure generated from the inflator 3 causes The bag body 1
It expands and expands rapidly with the destruction of the cover pad (not shown).

【００１７】このとき、インフレータ３から発生するガ
スはメインバッグ５内から逆止弁７を通ってサブバッグ
６内へ流入するため、図３に示すようにメインバッグ５
内圧力Ｐ1 とサブバッグ６内圧力Ｐ1 はＰ1＝Ｐ1となり
等しい。このとき、サブバッグ６に連通する調整バッグ
１５は若干膨張して図６に示すように排気孔１４を断面
積Ａ1(直径ａ）にする。At this time, the gas generated from the inflator 3 flows into the sub bag 6 from the main bag 5 through the check valve 7 as shown in FIG.
Inner pressure P 1 and the sub bag 6 in the pressure P 1 is P 1 = P 1 becomes equal. At this time, the adjustment bag 15 communicating with the subbag 6 slightly expands to make the exhaust hole 14 have a cross-sectional area A 1 (diameter a) as shown in FIG.

【００１８】ここで、車両衝突速度が低いとき、あるい
は、乗員がシートベルトを着用しているときに乗員がバ
ッグ本体１に衝突すると、乗員による衝撃力Ｆ1 によっ
て図４に示すように、サブバッグ６内圧力がＰ1からＰ2
（Ｐ2＞Ｐ1）となり、逆止弁７が閉じて、調整バッグ１
５が膨張する。[0018] Here, when the vehicle crash velocity is low, or when the driver collides with the bag body 1 when the occupant is wearing a seat belt, as shown in FIG. 4 by the impact force F 1 by the occupant, sub The pressure in bag 6 is changed from P 1 to P 2
(P 2 > P 1 ), the check valve 7 is closed, and the adjustment bag 1
5 expands.

【００１９】これによって、メインバッグ５の排気孔１
４の直径はａからｂ（ｂ＜ａ）へと縮径し（図７参
照）、メインバッグ５の排気孔１４の断面積はＡ1から
Ａ2（Ａ2＜Ａ1 ）へと適正な大きさとなり、メインバッ
グ５内のガスが排気孔１４から適度に排出されて乗員の
干渉による衝撃力を軟い状態で吸収する。Thus, the exhaust hole 1 of the main bag 5
4 of diameter reduced in diameter to b (b <a) from a (see FIG. 7), the cross-sectional area of the exhaust hole 14 of the main bag 5 proper from A 1 A 2 to (A 2 <A 1) The gas in the main bag 5 is appropriately discharged from the exhaust hole 14 to absorb the impact force due to the occupant interference in a soft state.

【００２０】一方、車両衝突速度が高いとき、あるい
は、乗員がシートベルトを着用していないときに乗員が
バッグ本体１に衝突すると、乗員による衝撃力Ｆ2（Ｆ2
＞Ｆ１）によって図５に示すように、サブバッグ６内圧
力がＰ１からＰ3（Ｐ3＞Ｐ2＞Ｐ1）となり、逆止弁７が
閉じて調整バッグ１５が膨張する。On the other hand, when the vehicle collision speed is high, or when the occupant collides with the bag body 1 when the occupant is not wearing a seat belt, the impact force F 2 (F 2
As shown in FIG. 5, due to> F 1 ), the pressure in the sub-bag 6 changes from P 1 to P 3 (P 3 > P 2 > P 1 ), the check valve 7 closes, and the adjustment bag 15 expands.

【００２１】これによって、メインバッグ５の排気孔１
４の直径はａからｃ（ｃ＜ｂ＜ａ）へと縮径し（図８参
照）、メインバッグ５の排気孔１４の断面積はＡ1 から
Ａ3（Ａ3＜Ａ2＜Ａ1)へと絞られ、メインバッグ５内の
ガスの排出が少なく抑えられ、乗員による大きな衝撃力
Ｆ2 に対抗する。Thus, the exhaust hole 1 of the main bag 5
4 of diameter reduced in diameter to c (c <b <a) from a (see FIG. 8), A 3 (A 3 the cross-sectional area of the exhaust hole 14 of the main bag 5 from A 1 <A 2 <A 1 ) squeezed into, exhaust gas in the main bag 5 is suppressed small, against the large impact force F 2 by the passenger.

【００２２】ここで、サブバッグ６内の圧力は乗員の干
渉直後に低下するが、このようにサブバッグ６内の圧力
が低下しても、導入管１６に設けられた逆止弁１７が導
入管１６を閉塞するため、調整バッグ１５の膨張の度合
は一定となるため、排出孔１４の直径が変動することは
ない。Here, the pressure in the sub-bag 6 decreases immediately after the occupant's interference. Even if the pressure in the sub-bag 6 decreases in this manner, the check valve 17 provided in the introduction pipe 16 is introduced. Since the pipe 16 is closed, the degree of inflation of the adjustment bag 15 is constant, so that the diameter of the discharge hole 14 does not change.

【００２３】このようにして、乗員のバッグ本体１への
干渉状態に応じてバッグ本体１の硬さを、簡単な構成で
ありながら自動的に調整するのである。In this way, the hardness of the bag body 1 is automatically adjusted according to the state of interference of the occupant with the bag body 1 with a simple structure.

【００２４】したがって、高速衝突時を基準としてバッ
グ本体１の硬さを設定した場合に、低速衝突時において
バッグ本体１が硬すぎたりするような不具合がなくな
る。Therefore, when the hardness of the bag body 1 is set on the basis of a high-speed collision, there is no problem that the bag body 1 is too hard at the time of a low-speed collision.

【００２５】[0025]

【発明の効果】以上説明してきたようにこの発明によれ
ば、乗員がバッグ本体に対して激しく衝突すればする
程、サブバッグ内圧力が高くなるため調整バッグが膨張
し、メインバッグの排気孔が小さくなりバッグ本体を硬
い特性にすることができる。As described above, according to the present invention, the more the occupant collides with the bag body, the higher the pressure in the sub-bag becomes, so that the adjustment bag expands and the exhaust hole of the main bag becomes larger. And the bag body can be made hard characteristics.

【００２６】したがって、衝突速度に応じてバッグ本体
の内圧を乗員の拘束に適した圧力に自動的に調整するこ
とができる。Therefore, the internal pressure of the bag body can be automatically adjusted to a pressure suitable for restraining the occupant in accordance with the collision speed.

【００２７】また、構造が簡単であるので小型でかつ低
コストで製造できるメリットがある。Further, since the structure is simple, there is an advantage that it can be manufactured at a small size and at low cost.

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

【図１】本発明の実施例の図２のＡ−Ａ断面図。FIG. 1 is a sectional view taken along line AA of FIG. 2 according to an embodiment of the present invention.

【図２】同斜視図。FIG. 2 is a perspective view of the same.

【図３】同展開状況説明図。FIG. 3 is an explanatory view of the deployment state.

【図４】同展開状況説明図。FIG. 4 is an explanatory diagram of the development situation.

【図５】同展開状況説明図。FIG. 5 is an explanatory diagram of the development situation.

【図６】図３に対応する要部説明図。FIG. 6 is an explanatory view of a main part corresponding to FIG. 3;

【図７】図４に対応する要部説明図。FIG. 7 is an explanatory view of a main part corresponding to FIG. 4;

【図８】図５に対応する要部説明図。FIG. 8 is an explanatory view of a main part corresponding to FIG. 5;

【符号の説明】[Explanation of symbols]

１…バッグ本体 ４…隔壁 ５…メインバッグ ６…サブバッグ ７…逆止弁 １４…排気孔 １５…調整バッグ DESCRIPTION OF SYMBOLS 1 ... Bag main body 4 ... Partition wall 5 ... Main bag 6 ... Sub bag 7 ... Check valve 14 ... Exhaust hole 15 ... Adjustment bag

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 バッグ本体が隔壁により前方側のメイン
バッグと乗員に対面する側のサブバッグとに区画形成さ
れ、上記隔壁には、サブバッグ側からメインバッグ側の
ガスの流出を阻止する逆止弁が設けられ、上記サブバッ
グに連通してメインバッグの排気孔の外縁を形成し、乗
員とサブバッグとの干渉の度合に応じて膨張し排気孔を
縮径する調整バッグが設けられていることを特徴とする
エアバッグ装置。1. A bag body is defined by a partition into a main bag on the front side and a subbag on the side facing the occupant, and the partition has an inverse for preventing gas from flowing from the subbag side to the main bag side. A stop valve is provided, and an outer bag of an exhaust hole of the main bag is formed in communication with the sub bag, and an adjustment bag is provided which expands and reduces the diameter of the exhaust hole according to the degree of interference between the occupant and the sub bag. An airbag device characterized by:
JP3010789A 1991-01-31 1991-01-31 Airbag device Expired - Fee Related JP2946771B2 (en)

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JP3010789A JP2946771B2 (en) 1991-01-31 1991-01-31 Airbag device

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Application Number Priority Date Filing Date Title
JP3010789A JP2946771B2 (en) 1991-01-31 1991-01-31 Airbag device

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JPH04244453A JPH04244453A (en) 1992-09-01
JP2946771B2 true JP2946771B2 (en) 1999-09-06

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US5957485A (en) * 1996-06-26 1999-09-28 Takata Corporation Dual air bag structure with an elastomer inner air bag and a method of forming thereof
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JP3463598B2 (en) 1999-04-13 2003-11-05 トヨタ自動車株式会社 Airbag device
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US6962363B2 (en) * 2000-07-07 2005-11-08 Milliken & Company Multiple chamber airbags and methods
US6554316B2 (en) * 2001-03-08 2003-04-29 Autoliv Asp, Inc. Multi-chamber airbag gas venting system
DE10164519B4 (en) * 2001-11-02 2006-06-22 Takata-Petri (Ulm) Gmbh An air bag assembly
DE20207388U1 (en) 2001-11-02 2002-08-14 Takata Petri Gmbh Ulm An air bag assembly
US6715786B1 (en) * 2001-12-27 2004-04-06 Zodiac Automotive Us Inc. Fabric valve
JP2004243976A (en) * 2003-02-17 2004-09-02 Takata Corp Airbag device for side impact
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DE102004059085A1 (en) * 2004-12-02 2006-06-08 Takata-Petri Ag Airbag for an airbag module of a motor vehicle
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EP2213526B1 (en) * 2009-01-22 2012-03-07 Autoliv Development AB A safety device
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JP5546899B2 (en) * 2010-02-25 2014-07-09 日本プラスト株式会社 Vehicle airbag
JP6140715B2 (en) * 2011-10-21 2017-05-31 ティーケー ホールディングス インク．Ｔｋ Ｈｏｌｄｉｎｇｓ Ｉｎｃ． Airbag module and method for controlling gas therein
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