JP7104569B2 - Airbag device - Google Patents

Airbag device Download PDF

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Publication number
JP7104569B2
JP7104569B2 JP2018119022A JP2018119022A JP7104569B2 JP 7104569 B2 JP7104569 B2 JP 7104569B2 JP 2018119022 A JP2018119022 A JP 2018119022A JP 2018119022 A JP2018119022 A JP 2018119022A JP 7104569 B2 JP7104569 B2 JP 7104569B2
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airbag
pair
seat
portions
front side
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JP2019218014A (en
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浩 坂本
匡俊 横田
典久 岡田
伸一 竹内
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Joyson Safety Systems Japan GK
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Joyson Safety Systems Japan GK
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Priority to JP2018119022A priority Critical patent/JP7104569B2/en
Priority to PCT/JP2019/023464 priority patent/WO2019244767A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/427—Seats or parts thereof displaced during a crash
    • 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
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/207—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in vehicle seats
    • 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
    • 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
    • B60R21/2334—Expansion control features
    • B60R21/2338—Tethers

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Air Bags (AREA)
  • Seats For Vehicles (AREA)

Description

本開示は、エアバッグ装置に関する。 The present disclosure relates to an airbag device.

従来、車両の座席のヘッドレストやシートバックからエアバッグを展開して、このエアバッグにより座席に着座している乗員の頭部の全方位を保護する手法が提案されている（例えば特許文献１）。 Conventionally, a method has been proposed in which an airbag is deployed from the headrest or seat back of a vehicle seat, and the airbag protects all directions of the head of an occupant seated in the seat (for example, Patent Document 1). ..

特開２０１７－１００６８８号公報Japanese Unexamined Patent Publication No. 2017-100688

しかし、ヘッドレストやシートバックからエアバッグを展開する構成では、頭部前方にエアバッグを展開するためにヘッドレストや乗員の頭部を越える必要があり、エアバッグがうまく展開できない場合がある。 However, in a configuration in which the airbag is deployed from the headrest or seat back, it is necessary to go over the headrest or the occupant's head in order to deploy the airbag in front of the head, and the airbag may not be deployed well.

本開示は、エアバッグを安定して展開できるエアバッグ装置を提供することを目的とする。 It is an object of the present disclosure to provide an airbag device capable of stably deploying an airbag.

本発明の実施形態の一観点に係るエアバッグ装置は、インフレータと、前記インフレータから供給されるガスにより展開するエアバッグと、座席のシートバックまたはヘッドレストに配置され、前記インフレータによりガスが供給される前の非作動時の前記エアバッグを収容する収容部と、を備え、前記エアバッグは、座席の背面側に展開する後方膨張部と、前記後方膨張部の座席幅方向両側から前方に延びる一対の側方膨張部と、前記一対の側方膨張部から中央側へ延び中央で相互に連結されて乗員の前方を覆う一対の前方膨張部と、を有し、前記収容部より前記座席の前方側、かつ前記座席の幅方向両側に設けられる一対の支持点と、前記エアバッグと前記一対の支持点とを連結する連結部材と、を有し、前記収容部の前記幅方向両側の方向にそれぞれ配置され、車両前方側に延在する一対のアーム部材を有し、前記アーム部材は、前記シートバック内のフレームと交差する方向に延在し、前記フレームより前方側に先端部を有し、前記一対の支持点は、前記一対のアーム部材の前記先端部にそれぞれ設けられ、前記連結部材は、前記エアバッグと同材料で形成される非膨張のパネルであり、前記アーム部材は、前記連結部材と異素材で形成され、前記連結部材の一端は、前記幅方向に沿った中心軸まわりに回転可能に、前記アーム部材の前記先端部に設けられる前記支持点に連結され、前記アーム部材は、前記エアバッグが前記収容部に収容されている状態、及び、前記エアバッグが前記収容部から展開し膨張されている状態の両方の状態において、前記先端部が前記フレームより車両前方側に配置されるように長手形状の延在方向が保持される。



The airbag device according to one aspect of the embodiment of the present invention is arranged on an inflator, an airbag developed by the gas supplied from the inflator, and a seat back or a headrest of a seat, and the gas is supplied by the inflator. A pair of accommodating portions for accommodating the airbag when the front is not activated, the airbag is provided with a rear inflating portion that expands to the rear side of the seat and a pair that extends forward from both sides of the rear inflating portion in the seat width direction. The seat has a lateral expansion portion and a pair of front expansion portions that extend from the pair of lateral expansion portions to the center side and are connected to each other at the center to cover the front of the occupant. It has a pair of support points provided on the side and both sides in the width direction of the seat, and a connecting member for connecting the airbag and the pair of support points, in the direction of both sides of the accommodating portion in the width direction. Each is arranged and has a pair of arm members extending to the front side of the vehicle, and the arm members extend in a direction intersecting the frame in the seat back and have a tip portion on the front side of the frame. The pair of support points are provided at the tip portions of the pair of arm members, the connecting member is a non-expandable panel formed of the same material as the airbag, and the arm member is the arm member. The arm member is made of a different material from the connecting member, and one end of the connecting member is rotatably connected to the support point provided at the tip of the arm member so as to be rotatable around the central axis along the width direction. In both the state where the airbag is housed in the housing part and the state where the airbag is expanded from the housing part and expanded, the tip portion is on the front side of the vehicle from the frame. The extending direction of the longitudinal shape is maintained so that it is arranged .

本開示によれば、エアバッグを安定して展開できるエアバッグ装置を提供することができる。 According to the present disclosure, it is possible to provide an airbag device capable of stably deploying an airbag.

実施形態に係るエアバッグ装置のエアバッグ展開時の斜視図である。It is a perspective view at the time of airbag deployment of the airbag device which concerns on embodiment. 図１に示すエアバッグ装置の側面図である。It is a side view of the airbag device shown in FIG. 図１に示すエアバッグ装置の正面図である。It is a front view of the airbag device shown in FIG. 図１～３中のエアバッグの平面視の概略構成を示す模式図である。It is a schematic diagram which shows the schematic structure of the airbag in FIG. 1 to 3 in the plan view. 実施形態に係るエアバッグ装置のエアバッグ収納時の側面図である。It is a side view at the time of storing the airbag of the airbag device which concerns on embodiment. 図５中の収容部近傍の拡大図である。It is an enlarged view of the vicinity of the accommodating part in FIG. シートバック内部のフレームへの収容部の設置構造を示す斜視図である。It is a perspective view which shows the installation structure of the accommodating part in the frame inside a seat back. 図７に示すフレーム及び収容部の分解斜視図である。FIG. 7 is an exploded perspective view of the frame and the accommodating portion shown in FIG. 7. 実施形態に係るエアバッグ装置によるエアバッグの展開手順の第１段階を示す図である。It is a figure which shows the 1st stage of the bag deployment procedure by the airbag device which concerns on embodiment. 実施形態に係るエアバッグ装置によるエアバッグの展開手順の第２段階を示す図である。It is a figure which shows the 2nd stage of the bag deployment procedure by the airbag device which concerns on embodiment. 実施形態に係るエアバッグ装置によるエアバッグの展開手順の第３段階を示す図である。It is a figure which shows the 3rd stage of the bag deployment procedure by the airbag device which concerns on embodiment. 実施形態に係るエアバッグ装置によるエアバッグの展開手順の第４段階を示す図である。It is a figure which shows the 4th stage of the airbag deployment procedure by the airbag device which concerns on embodiment. 実施形態に係るエアバッグ装置によるエアバッグの展開手順の第５段階を示す図である。It is a figure which shows the 5th stage of the bag deployment procedure by the airbag device which concerns on embodiment.

以下、添付図面を参照しながら実施形態について説明する。説明の理解を容易にするため、各図面において同一の構成要素に対しては可能な限り同一の符号を付して、重複する説明は省略する。 Hereinafter, embodiments will be described with reference to the accompanying drawings. In order to facilitate understanding of the description, the same components are designated by the same reference numerals as much as possible in each drawing, and duplicate description is omitted.

なお、以下の説明において、各図面で示すｘ方向、ｙ方向、ｚ方向は互いに垂直な方向である。ｘ方向は車両の前後方向であり、ｘ正方向側が車両前方、ｘ負方向側が車両後方である。ｙ方向は車両の幅方向であり、ｙ正方向側が車両右側、ｙ負方向側が車両左側である。ｚ方向は上下方向であり、ｚ正方向側が上方、ｚ負方向側が下方である。 In the following description, the x-direction, y-direction, and z-direction shown in each drawing are perpendicular to each other. The x direction is the front-rear direction of the vehicle, the x-positive direction side is the front of the vehicle, and the x-negative direction side is the rear of the vehicle. The y direction is the width direction of the vehicle, the positive side of y is the right side of the vehicle, and the negative side of y is the left side of the vehicle. The z direction is the vertical direction, the z positive direction side is upward, and the z negative direction side is downward.

図１～図４を参照して、実施形態に係るエアバッグ装置１０の構成を説明する。図１は、実施形態に係るエアバッグ装置１０のエアバッグ展開時の斜視図である。図２は、図１に示すエアバッグ装置１０の側面図である。図３は、図１に示すエアバッグ装置１０の正面図である。図４は、図１～３中のエアバッグ２０の平面視の概略構成を示す模式図である。 The configuration of the airbag device 10 according to the embodiment will be described with reference to FIGS. 1 to 4. FIG. 1 is a perspective view of the airbag device 10 according to the embodiment when the airbag is deployed. FIG. 2 is a side view of the airbag device 10 shown in FIG. FIG. 3 is a front view of the airbag device 10 shown in FIG. FIG. 4 is a schematic view showing a schematic configuration of the airbag 20 in FIGS. 1 to 3 in a plan view.

図１～図３に示すように、エアバッグ装置１０は車両の座席６０に搭載される。座席６０は、乗員Ｄが着座する座部６１と、座部６１の後端に下端が連結されたシートバック６２と、シートバック６２の上端に設けられたヘッドレスト６３とを含んで構成される。シートバック６２の内部にはフレーム６４が配置されている。なお、図１～図３には図示を省略しているが、座席６０にはシートベルト、タング、バックル、リトラクタなど、車両用シートに搭載される一般的な要素も設置されている。 As shown in FIGS. 1 to 3, the airbag device 10 is mounted on the seat 60 of the vehicle. The seat 60 includes a seat portion 61 on which the occupant D is seated, a seat back 62 having a lower end connected to the rear end of the seat portion 61, and a headrest 63 provided at the upper end of the seat back 62. A frame 64 is arranged inside the seat back 62. Although not shown in FIGS. 1 to 3, the seat 60 is also provided with general elements mounted on the vehicle seat, such as a seat belt, a tongue, a buckle, and a retractor.

エアバッグ装置１０は、座席６０に乗員Ｄが着座した状態で、展開したエアバッグ２０によって乗員Ｄを前後左右の全方向の衝突から保護する。エアバッグ２０は、座席６０のヘッドレスト６３と、座席６０に着座している乗員Ｄの頭部Ｈの周囲を覆い、上方と下方が開口する筒状に形成されている。 The airbag device 10 protects the occupant D from collisions in all directions in the front, rear, left, and right directions by the deployed airbag 20 while the occupant D is seated in the seat 60. The airbag 20 covers the circumference of the headrest 63 of the seat 60 and the head H of the occupant D seated in the seat 60, and is formed in a cylindrical shape with upper and lower openings.

図１～図４では、保護すべき乗員Ｄのモデルとして衝突試験用のダミー人形が座席６０の座部６１に着座した状態を示している。ダミー人形は、例えばＷｏｒｌｄＳＩＤ（国際統一側面衝突ダミー：Ｗｏｒｌｄ Ｓｉｄｅ Ｉｍｐａｃｔ Ｄｕｍｍｙ）のＡＭ５０（米国人成人男性の５０パーセンタイル）である。このダミー人形は、衝突試験法で定められた標準的な着座姿勢（正規の状態）で着座しており、座席６０は、当該着座姿勢に対応した基準設定位置に位置している。ダミー人形の頭部Ｈは、顔面を車両前方（シート前方）へ向けている。 1 to 4 show a state in which a crash test dummy is seated on the seat 61 of the seat 60 as a model of the occupant D to be protected. The dummy doll is, for example, AM50 (50th percentile of an American adult male) of WorldSID (International Unified Side Collision Dummy: World Side Impact Dummy). The dummy doll is seated in a standard sitting posture (normal state) defined by the collision test method, and the seat 60 is located at a reference setting position corresponding to the sitting posture. The head H of the dummy doll has its face facing the front of the vehicle (front of the seat).

エアバッグ装置１０は、エアバッグ２０と、インフレータ３０と、収容部４０とを備える。インフレータ３０及び収容部４０については図５～図８を参照して後述する。 The airbag device 10 includes an airbag 20, an inflator 30, and an accommodating portion 40. The inflator 30 and the accommodating portion 40 will be described later with reference to FIGS. 5 to 8.

エアバッグ２０は、乗員Ｄの頭部Ｈを前方及び左右両側方から覆うように膨張展開される筒状の一体の袋体として構成されている。より詳細には、エアバッグ２０は、後方膨張部２１、一対の側方膨張部２２Ａ，２２Ｂ、一対の前方膨張部２３Ａ，２３Ｂを有する。 The airbag 20 is configured as a tubular integrated bag body that is expanded and deployed so as to cover the head H of the occupant D from the front and both left and right sides. More specifically, the airbag 20 has a rear expansion portion 21, a pair of side expansion portions 22A and 22B, and a pair of front expansion portions 23A and 23B.

後方膨張部２１は、図１，２、４に示すように、ヘッドレスト６３より後方の位置で、ヘッドレスト６３やシートバック６２と対向するよう展開する。後方膨張部２１は、図４に示すように、ｙ方向両側の端部にて、後方屈曲部７４Ａ、７４Ｂを介して一対の側方膨張部２２Ａ，２２Ｂの後方側端部に接続されている。後方屈曲部７４Ａ、７４Ｂはｘ正方向側に略直角に屈曲して、図１，２，４に示すように、一対の側方膨張部２２Ａ，２２Ｂを後方膨張部２１から前方へ延在させる。 As shown in FIGS. 1 and 4, the rear expansion portion 21 is deployed so as to face the headrest 63 and the seat back 62 at a position rearward from the headrest 63. As shown in FIG. 4, the rear expansion portion 21 is connected to the rear side ends of the pair of lateral expansion portions 22A and 22B via the rear bending portions 74A and 74B at the ends on both sides in the y direction. .. The rear bending portions 74A and 74B are bent substantially at right angles to the x positive direction side, and as shown in FIGS. 1, 2 and 4, the pair of lateral expanding portions 22A and 22B extend forward from the rear expanding portion 21. ..

一対の側方膨張部２２Ａ，２２Ｂは、乗員Ｄの頭部Ｈの左右にそれぞれ配置される。一対の側方膨張部２２Ａ，２２Ｂは、後方側に対して前方側のほうが上下方向の寸法が長く、かつ、下方側により長く形成される。前方側の長さは、前方膨張部２３Ａ、２３Ｂの上下方向寸法と略同一である。 The pair of lateral expansion portions 22A and 22B are arranged on the left and right sides of the head H of the occupant D, respectively. The pair of lateral expansion portions 22A and 22B are formed to have a longer dimension in the vertical direction on the front side with respect to the rear side and a longer dimension on the lower side. The length on the front side is substantially the same as the vertical dimension of the front expansion portions 23A and 23B.

一対の側方膨張部２２Ａ，２２Ｂは、前方側端部にて前方屈曲部７５Ａ、７５Ｂを介して一対の前方膨張部２３Ａ、２３Ｂに接続されている。前方屈曲部７５Ａ、７５Ｂはｙ方向かつ中心側に略直角に屈曲して、図１、３、４に示すように、一対の前方膨張部２３Ａ，２３Ｂを乗員Ｄの頭部Ｈの前方を覆うように中央側へ延在させる。一対の前方膨張部２３Ａ，２３Ｂは、ｙ方向の略中央位置にて中央接合部７６によってｚ方向に沿って相互に接合され、これにより乗員Ｄの頭部Ｈの前方に並んで配置され、頭部Ｈの前方を完全に塞ぐことができる。また、一対の前方膨張部２３Ａ、２３Ｂは、ｘ方向から視たときに略矩形状に形成され、乗員Ｄの頭部Ｈの正面全体をカバーできる程度の幅方向及び上下方向の寸法がとられている。 The pair of lateral expansion portions 22A and 22B are connected to the pair of front expansion portions 23A and 23B at the front side end portions via the front bending portions 75A and 75B. The front bent portions 75A and 75B are bent in the y direction and substantially at right angles to the center side, and as shown in FIGS. To extend to the center side. The pair of anterior expansion portions 23A and 23B are joined to each other along the z direction by the central joint portion 76 at a substantially central position in the y direction, whereby the pair of front expansion portions 23A and 23B are arranged side by side in front of the head H of the occupant D and head. The front of the part H can be completely closed. Further, the pair of front expansion portions 23A and 23B are formed in a substantially rectangular shape when viewed from the x direction, and are dimensioned in the width direction and the vertical direction so as to cover the entire front surface of the head H of the occupant D. ing.

このようにエアバッグ２０は、中央接合部７６によって、一体的な袋体の両端が接合縫いで接合されることで、乗員Ｄの頭部Ｈの前後方向、左右方向の全方位を囲んだドーナツ状に形成されている。 In this way, the airbag 20 is a donut that surrounds all directions in the front-rear direction and the left-right direction of the head H of the occupant D by joining both ends of the integral bag body by joint stitching by the central joint portion 76. It is formed in a shape.

また、前方膨張部２３Ａ，２３Ｂは、中央接合部７６を幅方向中央に配置することにより、乗員Ｄ側から視たときに前方膨張部２３Ａ，２３Ｂのｙ方向の略中央部に前方に窪んだ前方凹部２７が形成されている。前方凹部２７は、中央接合部７６の範囲に亘りｚ方向に延在する。前方膨張部２３Ａ，２３Ｂの内表面に前方凹部２７があることによって、頭部Ｈに対する前方膨張部２３Ａ，２３Ｂの内表面の接触面が広くなり、また、対向角度も多様となるので、車両前方側でエアバッグ２０が衝撃吸収可能な方位を増やすことができ、乗員Ｄをより幅広い方向の衝突から保護できる。 Further, the front expansion portions 23A and 23B are recessed forward in the substantially central portion of the front expansion portions 23A and 23B in the y direction when viewed from the occupant D side by arranging the central joint portion 76 in the center in the width direction. The front recess 27 is formed. The front recess 27 extends in the z direction over the range of the central joint 76. Since the front recesses 27 are provided on the inner surfaces of the front expansion portions 23A and 23B, the contact surfaces of the inner surfaces of the front expansion portions 23A and 23B with respect to the head H are widened, and the facing angles are also diversified. On the side, the direction in which the airbag 20 can absorb shock can be increased, and the occupant D can be protected from a collision in a wider range of directions.

前方膨張部２３Ａ、２３Ｂの上端位置は、乗員Ｄの頭部Ｈの頭頂部より上方となればよい。また、その下端位置は、本実施形態では乗員Ｄの胸部を覆う位置となるように設けられているが、少なくとも乗員Ｄの頭部Ｈをカバーできる程度の位置でもよく、図１～図３に示す本実施形態の寸法より短くてもよい。 The upper end positions of the front expansion portions 23A and 23B may be above the crown portion of the head H of the occupant D. Further, the lower end position is provided so as to cover the chest of the occupant D in the present embodiment, but may be at least a position capable of covering the head H of the occupant D, as shown in FIGS. 1 to 3. It may be shorter than the dimensions of the present embodiment shown.

図１～図４に示すように、一対の前方膨張部２３Ａ，２３Ｂは、拘束部２４Ａ，２４Ｂ及びエネルギ吸収（Ｅｎｅｒｇｙ Ａｂｓｏｒｐｔｉｏｎ：ＥＡ）部２５Ａ，２５Ｂを有する。拘束部２４Ａ，２４Ｂは、それぞれ一対の側方膨張部２２Ａ，２２Ｂから中央側に屈曲して延在する。ＥＡ部２５Ａ，２５Ｂは、拘束部２４Ａ，２４Ｂの中央側端部に接続され、中央部からｙ方向両側の前方屈曲部７５Ａ、７５Ｂ側へと延在して、これにより拘束部２４Ａ，２４Ｂの前方側に重ねて配置される。また、ＥＡ部２５Ａ、２５Ｂの外側端部は、一対の側方膨張部２２Ａ，２２Ｂの前方側端部に設けられる先端接合部７７Ａ、７７Ｂによって、一対の側方膨張部２２Ａ，２２Ｂと接合される。これにより、一対のＥＡ部２５Ａ，２５Ｂが拘束部２４Ａ、２４Ｂの前方にてｙ方向に並んで配置され、かつ、拘束部２４Ａ，２４Ｂと平行に配置されて、拘束部２４Ａ，２４ＢとＥＡ部２５Ａ、２５Ｂとが乗員Ｄの頭部Ｈの前方に二重に配置される。 As shown in FIGS. 1 to 4, the pair of forward expansion portions 23A and 23B have restraint portions 24A and 24B and energy absorption (EA) portions 25A and 25B. The restraint portions 24A and 24B bend and extend toward the center from the pair of lateral expansion portions 22A and 22B, respectively. The EA portions 25A and 25B are connected to the central end portions of the restraint portions 24A and 24B and extend from the central portion to the front bending portions 75A and 75B on both sides in the y direction, whereby the restraint portions 24A and 24B of the restraint portions 24A and 24B. It is placed on top of each other on the front side. Further, the outer ends of the EA portions 25A and 25B are joined to the pair of lateral expansion portions 22A and 22B by the tip joining portions 77A and 77B provided at the front side ends of the pair of lateral expansion portions 22A and 22B. To. As a result, the pair of EA portions 25A and 25B are arranged side by side in the y direction in front of the restraint portions 24A and 24B, and are arranged in parallel with the restraint portions 24A and 24B, so that the restraint portions 24A and 24B and the EA portion are arranged. 25A and 25B are doubly arranged in front of the head H of the occupant D.

前方膨張部２３Ａ，２３Ｂの拘束部２４Ａ，２４Ｂは、乗員Ｄの頭部Ｈの正面に配置されて、衝突時に頭部Ｈの正面側を保護するよう機能する。ＥＡ部２５Ａ、２５Ｂは、座席前方のハンドル等にエアバッグ２０が衝突するなどの二次衝突が発生した場合に、エアバッグ２０の拘束部２４Ａ、２４Ｂ側にかかる荷重を制限して乗員にかかるエネルギを吸収緩和するよう機能する。 The restraint portions 24A and 24B of the front expansion portions 23A and 23B are arranged in front of the head H of the occupant D and function to protect the front side of the head H in the event of a collision. The EA portions 25A and 25B limit the load applied to the restraint portions 24A and 24B of the airbag 20 and are applied to the occupant when a secondary collision such as the airbag 20 colliding with the steering wheel in front of the seat occurs. It functions to absorb and relax energy.

エアバッグ２０は、後方膨張部２１のインフレータ挿入口２６にインフレータ３０が取り付けられて、インフレータ３０からのガスが供給される。エアバッグ２０は、後方膨張部２１から一方の側方膨張部２２Ａ、一方の拘束部２４Ａ、一方のＥＡ部２５Ａの順でガス流路が形成され、また、後方膨張部２１から他方の側方膨張部２２Ｂ、他方の拘束部２４Ｂ、他方のＥＡ部２５Ｂの順でガス流路が形成される。 In the airbag 20, the inflator 30 is attached to the inflator insertion port 26 of the rear expansion portion 21, and gas from the inflator 30 is supplied. In the airbag 20, a gas flow path is formed in the order of one lateral expansion portion 22A, one restraint portion 24A, and one EA portion 25A from the rear expansion portion 21, and the rear expansion portion 21 to the other side. A gas flow path is formed in the order of the expansion portion 22B, the other restraint portion 24B, and the other EA portion 25B.

図５～図８を参照して、エアバッグ２０の収納状態を説明する。図５は、実施形態に係るエアバッグ装置１０のエアバッグ収納時の側面図である。図６は、図５中の収容部４０近傍の拡大図である。図７は、シートバック６２内部のフレーム６４への収容部４０の設置構造を示す斜視図である。図８は、図７に示すフレーム６４及び収容部４０の分解斜視図である。エアバッグ２０は、折り畳まれた状態で収容部４０に収容される。収容部４０は、例えばシートバック６２内部のフレーム６４に取り付けられてシートバック６２内に格納される。 The stored state of the airbag 20 will be described with reference to FIGS. 5 to 8. FIG. 5 is a side view of the airbag device 10 according to the embodiment when the airbag is stored. FIG. 6 is an enlarged view of the vicinity of the accommodating portion 40 in FIG. FIG. 7 is a perspective view showing an installation structure of the accommodating portion 40 in the frame 64 inside the seat back 62. FIG. 8 is an exploded perspective view of the frame 64 and the accommodating portion 40 shown in FIG. 7. The airbag 20 is housed in the storage unit 40 in a folded state. The accommodating portion 40 is attached to, for example, a frame 64 inside the seat back 62 and is stored in the seat back 62.

収容部４０は、シートバック６２の延在方向に沿って上方に開口して配置される。収容部４０の下方にインフレータ３０が配置され、収容部の下方からエアバッグ２０のインフレータ挿入口２６に挿入される。インフレータ挿入口２６は、例えば収容部４０の底壁を貫通して下方に進出されて、インフレータ３０が挿入される。 The accommodating portion 40 is arranged so as to open upward along the extending direction of the seat back 62. The inflator 30 is arranged below the accommodating portion 40, and is inserted into the inflator insertion port 26 of the airbag 20 from below the accommodating portion 40. The inflator insertion port 26 penetrates, for example, the bottom wall of the accommodating portion 40 and advances downward to insert the inflator 30.

インフレータ３０は、例えば燃焼式またはコールドガス式であり、車両のＥＣＵなどの制御装置によって動作を制御される。インフレータ３０は、作動することによって発生したガスを、インフレータ挿入口２６を介してエアバッグ２０内に供給する。本実施形態では、インフレータ３０は、例えばシリンダ型のインフレータであり、シートの高さ方向を長手方向として配置されている。 The inflator 30 is, for example, a combustion type or a cold gas type, and its operation is controlled by a control device such as an ECU of a vehicle. The inflator 30 supplies the gas generated by the operation into the airbag 20 through the inflator insertion port 26. In the present embodiment, the inflator 30 is, for example, a cylinder type inflator, and is arranged with the height direction of the seat as the longitudinal direction.

インフレータ３０は、例えば図６に示すように、フレーム６４に固設されたブラケット３１にバンド３２を用いて固定される。本実施形態では、図４に示すとおり後方膨張部２１に２つのインフレータ挿入口２６が設けられ、２本のインフレータ３０が設置されるが、インフレータ３０の数は１本でもよいし、２本より多い数でもよい。 The inflator 30 is fixed to the bracket 31 fixed to the frame 64 by using the band 32, for example, as shown in FIG. In the present embodiment, as shown in FIG. 4, two inflator insertion ports 26 are provided in the rear expansion portion 21, and two inflators 30 are installed. However, the number of inflators 30 may be one or more. It may be a large number.

収容部４０は、例えば樹脂製で箱状に形成されており、上方側が開口されている。この収容部４０の箱状の内部空間に、折り畳まれた状態のエアバッグ２０が収容される。収容部４０は、エアバッグ装置１０の非作動時にはシートバック６２の上部に格納されている。エアバッグ装置１０の作動時には、エアバッグ２０の膨張圧によってシートバック６２の表面が破断され、エアバッグ２０が外部に膨張展開できるようになっている。 The accommodating portion 40 is made of resin, for example, and is formed in a box shape, and the upper side is opened. The folded airbag 20 is accommodated in the box-shaped internal space of the accommodating portion 40. The accommodating portion 40 is stored in the upper part of the seat back 62 when the airbag device 10 is not activated. When the airbag device 10 is operated, the surface of the seat back 62 is broken by the expansion pressure of the airbag 20, so that the airbag 20 can be expanded and deployed to the outside.

図６に示すように、収容部４０に収容される状態のエアバッグ２０は、ロール状に折り畳まれたロール折り部７１と、蛇腹状に折り畳まれた蛇腹折り部７２とを含んで構成される。ロール折り部７１は、エアバッグ２０の展開状態における前方膨張部２３Ａ、２３Ｂ側から側方膨張部２２Ａ、２２Ｂの上方面側へ上向き回りに巻くようにロール状に折り畳まれた状態で収容部４０に収容されており、膨張展開時にシート前方側へ展開しやすい折り畳み方とされている。蛇腹折り部７２は、エアバッグ２０の展開状態における後方膨張部２１を蛇腹状に折り畳まれた状態で、収容部４０のロール折り部７１より上方の位置に収容されており、膨張展開時にロール折り部７１より先に展開しやすくされている。 As shown in FIG. 6, the airbag 20 in a state of being accommodated in the accommodating portion 40 includes a roll-folded portion 71 folded in a roll shape and a bellows-folded portion 72 folded in a bellows shape. .. The roll folding portion 71 is folded into a roll shape so as to wind upward from the front expanding portions 23A and 23B side to the upper surface side of the lateral expanding portions 22A and 22B in the deployed state of the airbag 20, and the accommodating portion 40. It is housed in the bag, and it is said that it can be easily folded to the front side of the seat when it is expanded and expanded. The bellows-folded portion 72 is housed in a position above the roll-folded portion 71 of the accommodating portion 40 in a state in which the rear expansion portion 21 in the expanded state of the airbag 20 is folded in a bellows shape, and is rolled-folded at the time of expansion and deployment. It is easy to deploy before the section 71.

エアバッグ２０のインフレータ挿入口２６は、ロール折り部７１及び蛇腹折り部７２に含まれず、ロール折り部７１より下方に配置されて、インフレータ３０が挿入されている。なお、図６では、ロール折り部７１及び蛇腹折り部７２の収納状態を模式的に表す便宜上、インフレータ挿入口２６からロール折り部７１及び蛇腹折り部７２の両方に分岐しているように図示されているが、上述のとおりインフレータ挿入口２６は後方膨張部２１に設けられるので、実際には蛇腹折り部７２のみに接続する。このため、ロール折り部７１と、蛇腹折り部７２とは、先にガスが上方の蛇腹折り部７２に供給可能となっている。 The inflator insertion port 26 of the airbag 20 is not included in the roll folding portion 71 and the bellows folding portion 72, but is arranged below the roll folding portion 71, and the inflator 30 is inserted. In FIG. 6, for convenience of schematically showing the stored state of the roll folding portion 71 and the bellows folding portion 72, it is shown so as to branch from the inflator insertion port 26 to both the roll folding portion 71 and the bellows folding portion 72. However, as described above, since the inflator insertion port 26 is provided in the rear expansion portion 21, it is actually connected only to the bellows folding portion 72. Therefore, the roll folding portion 71 and the bellows folding portion 72 can supply gas to the upper bellows folding portion 72 first.

また、ロール折り部７１は、側方膨張部２２Ａ、２２Ｂ、前方膨張部２３Ａ、２３Ｂの順でガスを供給することで、側方膨張部２２Ａ、２２Ｂが乗員Ｄの頭部Ｈより上方の位置で膨張展開し、前方膨張部２３Ａ、２３Ｂが乗員Ｄの頭部Ｈより前方の位置で膨張展開するよう構成される。 Further, the roll folding portion 71 supplies gas in the order of the lateral expanding portions 22A and 22B and the front expanding portions 23A and 23B, so that the lateral expanding portions 22A and 22B are located above the head H of the occupant D. 23A and 23B are configured to expand and expand at a position in front of the head H of the occupant D.

また、本実施形態では、収容部４０の幅方向両側から車両前方側に延在する一対のアーム部材４３を有する。アーム部材４３は、例えば図７、図８に示すように収容部４０のｙ方向両端にて収容部４０と一体的に設けられ、フレーム６４の幅方向外側を通って車両前方側へ延在している。なお、アーム部材４３は、収容部４０と別部材として設け、フレーム６４など他部材に連結される構成でもよい。アーム部材４３の延在方向は、例えばフレーム６４の延在方向と直交し、斜め上方である。 Further, in the present embodiment, the housing portion 40 has a pair of arm members 43 extending from both sides in the width direction to the front side of the vehicle. As shown in FIGS. 7 and 8, for example, the arm member 43 is integrally provided with the accommodating portion 40 at both ends in the y direction of the accommodating portion 40, and extends to the front side of the vehicle through the outside in the width direction of the frame 64. ing. The arm member 43 may be provided as a separate member from the accommodating portion 40 and may be connected to another member such as the frame 64. The extending direction of the arm member 43 is, for example, orthogonal to the extending direction of the frame 64 and is obliquely upward.

一対のアーム部材４３の先端部には、それぞれ一対の支持点４１が設けられる。つまり、一対の支持点４１は、収容部４０より座席６０の前方側、かつ座席６０の幅方向両側に設けられる。また、本実施形態では、支持点４１はフレーム６４より車両前方側に配置される。 A pair of support points 41 are provided at the tips of the pair of arm members 43, respectively. That is, the pair of support points 41 are provided on the front side of the seat 60 from the accommodating portion 40 and on both sides in the width direction of the seat 60. Further, in the present embodiment, the support point 41 is arranged on the vehicle front side of the frame 64.

そして特に本実施形態では、エアバッグ２０は、収納時にロール折り部７１と支持点４１とを連結する一対のタブ部材４２（連結部材）を有する。タブ部材４２は、エアバッグ２０と同材料で形成される非膨張のパネルである。タブ部材４２の一端は、支持点４１にｙ軸まわりに回転可能に連結され、他端はロール折り部７１に連結される。この他端は、図２に示すように、エアバッグ２０の展開時には、エアバッグ２０の側方膨張部２２Ａ、２２Ｂの下部に連結される。 In particular, in the present embodiment, the airbag 20 has a pair of tab members 42 (connecting members) that connect the roll folding portion 71 and the support point 41 at the time of storage. The tab member 42 is a non-expandable panel made of the same material as the airbag 20. One end of the tab member 42 is rotatably connected to the support point 41 about the y-axis, and the other end is connected to the roll folding portion 71. As shown in FIG. 2, the other end is connected to the lower portion of the lateral expansion portions 22A and 22B of the airbag 20 when the airbag 20 is deployed.

タブ部材４２は、エアバッグ２０と支持点４１とを連結できる連結部材であればよく、エアバッグ２０とは異なる材料で形成してもよいし、エアバッグ２０の膨張に併せて膨張するものでもよい。また、タブ部材４２は、支持点４１と連結される一端と、エアバッグ２０に連結される他端との間を延在方向とする細長い帯形状であればよく、タブ部材４２の代わりに、紐、帯、ベルト、ストラップなどの他の帯形状の要素に置き換えてもよい。 The tab member 42 may be formed of a material different from that of the airbag 20 as long as it is a connecting member capable of connecting the airbag 20 and the support point 41, or may be expanded in accordance with the expansion of the airbag 20. good. Further, the tab member 42 may have an elongated band shape having an extending direction between one end connected to the support point 41 and the other end connected to the airbag 20, and instead of the tab member 42, It may be replaced with other band-shaped elements such as strings, bands, belts and straps.

次に、図９～図１３を参照して、エアバッグ装置１０によるエアバッグ２０の展開手順を説明する。図９～図１３は、実施形態に係るエアバッグ装置１０によるエアバッグ２０の展開手順の第１～第５段階をそれぞれ示す図である。 Next, the procedure for deploying the airbag 20 by the airbag device 10 will be described with reference to FIGS. 9 to 13. 9 to 13 are diagrams showing the first to fifth stages of the procedure for deploying the airbag 20 by the airbag device 10 according to the embodiment, respectively.

まず図５、図６に示したように平常時（エアバッグ装置１０非作動時）には、エアバッグ２０は折り畳まれてシードバック内の収容部４０に格納されている。そして、車両の衝突等により所定の閾値以上の衝撃を受けると、ＥＣＵによりインフレータ３０が作動され、インフレータ３０からエアバッグ２０にガスが供給され始める。 First, as shown in FIGS. 5 and 6, in normal times (when the airbag device 10 is not operating), the airbag 20 is folded and stored in the accommodating portion 40 in the seed bag. Then, when an impact equal to or higher than a predetermined threshold value is received due to a vehicle collision or the like, the inflator 30 is operated by the ECU, and gas is started to be supplied from the inflator 30 to the airbag 20.

図９に示す第１段階では、インフレータ３０からガスが供給され始めると、まず上方の蛇腹折り部７２にガスが供給されて膨張しはじめる。蛇腹折り部７２は、蛇腹形状を展開しながらシートバック６２の表面を破断してシート後方側に進出し、上方側かつシート後方側に展開しはじめる。 In the first stage shown in FIG. 9, when gas is started to be supplied from the inflator 30, gas is first supplied to the bellows folding portion 72 above and starts to expand. The bellows folding portion 72 breaks the surface of the seat back 62 while expanding the bellows shape, advances to the rear side of the seat, and begins to expand to the upper side and the rear side of the seat.

図１０に示す第２段階では、蛇腹折り部７２の展開が完了すると後方膨張部２１が形成される。その後ロール折り部７１にガスが供給され始めると、ロール折り部７１がロール状に折り畳まれた状態から展開すべく膨張しはじめる。このとき、膨張に伴い生じる膨張力によって、ロール折り部７１は、シート背面側に展開した後方膨張部２１から車両前方側かつ上方側へ反力を受ける。この反力によって、ロール折り部７１は、斜め上方にヘッドレスト６３を乗り越えるように展開する。つまり、先に展開して後方膨張部２１が、ロール折り部７１の展開方向を前方に促進させるための土台として機能する。また、ロール折り部７１は上述のように上向き回りで巻かれているため、下向き回りに回転して展開する。 In the second stage shown in FIG. 10, the rear expansion portion 21 is formed when the deployment of the bellows folding portion 72 is completed. After that, when gas starts to be supplied to the roll folding portion 71, the roll folding portion 71 begins to expand in order to expand from the rolled state. At this time, due to the expansion force generated by the expansion, the roll folding portion 71 receives a reaction force from the rear expansion portion 21 developed on the back surface side of the seat to the front side and the upper side of the vehicle. Due to this reaction force, the roll folding portion 71 is deployed so as to get over the headrest 63 diagonally upward. That is, the rear expansion portion 21 that expands first functions as a base for promoting the expansion direction of the roll folding portion 71 forward. Further, since the roll folding portion 71 is wound upward as described above, it is rotated downward and unfolded.

図１１に示す第３段階では、ロール折り部７１の膨張が進み、まずは側方膨張部２２Ａ、２２Ｂが展開しはじめる。側方膨張部２２Ａ、２２Ｂは車両前方側かつ上方側に膨張する。このとき、側方膨張部２２Ａ、２２Ｂの下部に取り付けられているタブ部材４２は、側方膨張部２２Ａ、２２Ｂの膨張が進むと、やがてエアバッグ２０と支持点４１との間で伸張して張力を発生させる。この張力によって、エアバッグ２０に支持点４１側（この状態では下方向）への引張力が新たに付与されるので、エアバッグ２０の展開方向は「車両前方側かつ上方側」から車両前方側に切り替わる。これにより、ロール折り部７１の残り部分は、収容部４０や後方膨張部２１より車両前方側にある支持点４１を中心に車両前方側へ回動して、車両前方側への展開が促進される。 In the third stage shown in FIG. 11, the roll folding portion 71 expands, and the lateral expanding portions 22A and 22B begin to expand. The lateral expansion portions 22A and 22B expand to the front side and the upper side of the vehicle. At this time, the tab member 42 attached to the lower portion of the lateral expansion portions 22A and 22B eventually expands between the airbag 20 and the support point 41 as the expansion of the lateral expansion portions 22A and 22B progresses. Generate tension. Due to this tension, a new tensile force is applied to the airbag 20 toward the support point 41 side (downward in this state), so that the deployment direction of the airbag 20 is from the "vehicle front side and upper side" to the vehicle front side. Switch to. As a result, the remaining portion of the roll folding portion 71 rotates toward the front side of the vehicle around the support point 41 on the front side of the vehicle from the accommodating portion 40 and the rear expansion portion 21, and the deployment toward the front side of the vehicle is promoted. To.

なお、上述のとおり、支持点４１は、座席６０のシートバック６２よりも車両前方側に配置されている。このため、エアバッグ２０の展開方向が「車両前方側かつ上方側」から車両前方側に切り替わるタイミングを遅らせることができ、側方膨張部２２Ａ、２２Ｂが充分に展開した後に展開方向を変えることが可能となるので、エアバッグ２０が乗員Ｄの頭部Ｈを越えて展開するのを容易にできる。すなわち、支持点４１の位置は、できるだけ車両前方側に配置されるのが好ましい。 As described above, the support point 41 is arranged on the front side of the vehicle with respect to the seat back 62 of the seat 60. Therefore, the timing at which the deployment direction of the airbag 20 is switched from the "vehicle front side and upper side" to the vehicle front side can be delayed, and the deployment direction can be changed after the lateral expansion portions 22A and 22B are sufficiently deployed. Since it is possible, the airbag 20 can be easily deployed beyond the head H of the occupant D. That is, the position of the support point 41 is preferably arranged on the front side of the vehicle as much as possible.

図１２に示す第４段階では、ロール折り部７１からまず側方膨張部２２Ａ、２２Ｂが形成されて乗員Ｄの頭部Ｈの側方を覆う。このときロール折り部７１の残り部分は、頭部Ｈより前方に進出しており、また、側方膨張部２２Ａ、２２Ｂの頭頂部２９Ａ、２９Ｂが天井に突き当たり、天井からの反力により上向きの展開方向が下向きに切り替えられ、車両天井から下方に展開しはじめる。 In the fourth stage shown in FIG. 12, lateral expansion portions 22A and 22B are first formed from the roll folding portion 71 to cover the side of the head H of the occupant D. At this time, the remaining portion of the roll folding portion 71 is advanced forward from the head H, and the crown portions 29A and 29B of the lateral expansion portions 22A and 22B abut against the ceiling and are upward due to the reaction force from the ceiling. The deployment direction is switched downward, and it begins to deploy downward from the vehicle ceiling.

そして図１３に示す第５段階では、ロール折り部７１から前方膨張部２３Ａ、２３Ｂが形成されて、乗員Ｄの頭部Ｈの前方部分も覆い、これにより乗員Ｄの前後左右方向の全方位を覆うエアバッグ２０が形成される。なお、このとき、タブ部材４２とエアバッグ２０との接続位置は支持点４１より前方にあるため、タブ部材４２は、例えば座席６０のシートバック６２の上端や上部前面の表面に前後方向に沿って設けられるスリット等を通ってシートバック６２から外部に進出しており、エアバッグ２０の展開に伴って進出位置が前方側に推移している。 Then, in the fifth stage shown in FIG. 13, the front expansion portions 23A and 23B are formed from the roll folding portion 71, and also cover the front portion of the head H of the occupant D, whereby the occupant D can be omnidirectional in all directions in the front-rear and left-right directions. An airbag 20 to cover is formed. At this time, since the connection position between the tab member 42 and the airbag 20 is in front of the support point 41, the tab member 42 is, for example, along the upper end of the seat back 62 of the seat 60 and the surface of the upper front surface in the front-rear direction. The seat back 62 advances to the outside through a slit or the like provided therefor, and the advance position shifts to the front side with the deployment of the airbag 20.

本実施形態に係るエアバッグ装置１０の効果を説明する。 The effect of the airbag device 10 according to the present embodiment will be described.

本実施形態のエアバッグ装置１０は、インフレータ３０と、インフレータ３０から供給されるガスにより展開するエアバッグ２０と、座席６０のシートバック６２に配置され、インフレータ３０によりガスが供給される前の非作動時のエアバッグ２０を収容する収容部４０と、を備える。エアバッグ２０は、座席６０の背面側に展開する後方膨張部２１と、後方膨張部２１の座席幅方向両側から前方に延びる一対の側方膨張部２２Ａ、２２Ｂと、一対の側方膨張部２２Ａ、２２Ｂから中央側へ延び中央で相互に連結されて乗員Ｄの前方を覆う一対の前方膨張部２３Ａ、２３Ｂと、を有し、収容部４０より座席６０の前方側、かつ座席６０の幅方向両側に設けられる一対の支持点４１と、エアバッグ２０と一対の支持点４１とを連結するタブ部材４２と、を有する。 The airbag device 10 of the present embodiment is arranged on the inflator 30, the airbag 20 deployed by the gas supplied from the inflator 30, and the seat back 62 of the seat 60, and is not supplied with gas by the inflator 30. A housing unit 40 for accommodating the airbag 20 during operation is provided. The airbag 20 includes a rear expansion portion 21 that expands on the back side of the seat 60, a pair of lateral expansion portions 22A and 22B that extend forward from both sides of the rear expansion portion 21 in the seat width direction, and a pair of lateral expansion portions 22A. , A pair of front expansion portions 23A and 23B extending from 22B to the center side and being interconnected at the center to cover the front of the occupant D, on the front side of the seat 60 from the accommodating portion 40, and in the width direction of the seat 60. It has a pair of support points 41 provided on both sides, and a tab member 42 that connects the airbag 20 and the pair of support points 41.

この構成により、エアバッグ装置１０の作動時にエアバッグ２０が膨張展開する際には、エアバッグ２０と支持点４１とを連結するタブ部材４２によって、エアバッグ２０に支持点４１へ向かう方向への力、すなわち支持点４１を中心としてエアバッグ２０を前方へ回動させるための力をエアバッグ２０に付与できる。また、一対の支持点４１は収容部４０やシートバック６２よりも座席６０の前方側に配置されているので、エアバッグ２０の回動中心をより前方側にでき、エアバッグ２０を前方側により一層展開させやすくできる。これにより、本実施形態のエアバッグ装置１０は、ヘッドレスト６３や乗員Ｄの頭部Ｈを確実に超えるようにエアバッグ２０を展開可能となり、エアバッグ２０を安定して展開できる。 With this configuration, when the airbag 20 expands and expands when the airbag device 10 is operated, the tab member 42 connecting the airbag 20 and the support point 41 directs the airbag 20 toward the support point 41. A force, that is, a force for rotating the airbag 20 forward about the support point 41 can be applied to the airbag 20. Further, since the pair of support points 41 are arranged on the front side of the seat 60 with respect to the accommodating portion 40 and the seat back 62, the rotation center of the airbag 20 can be made closer to the front side, and the airbag 20 can be moved to the front side. It can be more easily deployed. As a result, the airbag device 10 of the present embodiment can deploy the airbag 20 so as to surely exceed the headrest 63 and the head H of the occupant D, and the airbag 20 can be stably deployed.

側方膨張部２２Ａ、２２Ｂは、図１１、図１２を参照して説明したように、その展開時には乗員Ｄの頭部Ｈの後方側から前方側へ跨いでエアバッグ２０の展開が行われるので、側方膨張部２２Ａ、２２Ｂの展開中には先端の未展開部分ができるだけ早く乗員Ｄの頭部Ｈを越えて前方側に移動できるのが好ましい。本実施形態では、タブ部材４２はエアバッグ２０の側方膨張部２２Ａ、２２Ｂに連結されるので、側方膨張部２２Ａ、２２Ｂの展開中にタブ部材４２によるエアバッグ２０の前方側への回動を促進でき、エアバッグ２０の未展開部分をヘッドレスト６３や乗員Ｄの頭部Ｈを越えて前方側へ移動さえるのを容易にできる。これにより、エアバッグ２０の展開のより一層の安定化が可能となる。 As described with reference to FIGS. 11 and 12, the lateral expansion portions 22A and 22B are deployed with the airbag 20 straddling from the rear side to the front side of the head H of the occupant D at the time of deployment. During the deployment of the lateral expansion portions 22A and 22B, it is preferable that the undeployed portion at the tip can move forward beyond the head H of the occupant D as soon as possible. In the present embodiment, since the tab member 42 is connected to the lateral expansion portions 22A and 22B of the airbag 20, the tab member 42 rotates the airbag 20 forward while the lateral expansion portions 22A and 22B are deployed. The movement can be promoted, and the undeployed portion of the airbag 20 can be easily moved to the front side beyond the headrest 63 and the head H of the occupant D. This makes it possible to further stabilize the deployment of the airbag 20.

また、本実施形態では、タブ部材４２は、エアバッグ２０と同材料で形成される非膨張のパネルであるので、タブ部材４２をエアバッグ２０と一体的に成形でき、タブ部材４２とエアバッグ２０との接続位置の精度向上を図れる。また、タブ部材４２がエアバッグ２０と同材料であるので、タブ部材４２の耐久性をエアバッグ２０と同等に向上できる。 Further, in the present embodiment, since the tab member 42 is a non-expandable panel formed of the same material as the airbag 20, the tab member 42 can be integrally molded with the airbag 20, and the tab member 42 and the airbag can be integrally formed. The accuracy of the connection position with 20 can be improved. Further, since the tab member 42 is made of the same material as the airbag 20, the durability of the tab member 42 can be improved to the same level as that of the airbag 20.

また、本実施形態では、収容部４０の幅方向両側から車両前方側に延在する一対のアーム部材４３を有し、アーム部材４３は、シートバック６２内のフレーム６４より前方側に先端部を有し、一対の支持点４１は、一対のアーム部材４３の先端部にそれぞれ設けられる。これにより、支持点４１を確実に車両前方側に配置でき、また、支持点４１の位置調整も容易にできるので、エアバッグ２０の展開のより一層の安定化が可能となる。 Further, in the present embodiment, the housing portion 40 has a pair of arm members 43 extending from both sides in the width direction to the front side of the vehicle, and the arm member 43 has a tip portion on the front side of the frame 64 in the seat back 62. The pair of support points 41 are provided at the tip ends of the pair of arm members 43, respectively. As a result, the support point 41 can be reliably arranged on the front side of the vehicle, and the position of the support point 41 can be easily adjusted, so that the deployment of the airbag 20 can be further stabilized.

以上、具体例を参照しつつ本実施形態について説明した。しかし、本開示はこれらの具体例に限定されるものではない。これら具体例に、当業者が適宜設計変更を加えたものも、本開示の特徴を備えている限り、本開示の範囲に包含される。前述した各具体例が備える各要素およびその配置、条件、形状などは、例示したものに限定されるわけではなく適宜変更することができる。前述した各具体例が備える各要素は、技術的な矛盾が生じない限り、適宜組み合わせを変えることができる。 The present embodiment has been described above with reference to specific examples. However, the present disclosure is not limited to these specific examples. Those skilled in the art with appropriate design changes to these specific examples are also included in the scope of the present disclosure as long as they have the features of the present disclosure. Each element included in each of the above-mentioned specific examples, its arrangement, conditions, shape, and the like are not limited to those illustrated, and can be changed as appropriate. The combination of each element included in each of the above-mentioned specific examples can be appropriately changed as long as there is no technical contradiction.

上記実施形態では、エアバッグ装置１０の収容部４０がシートバック６２内に格納される構成を例示したが、収容部４０をヘッドレスト６３の内部に格納する構成でもよい。 In the above embodiment, the configuration in which the accommodating portion 40 of the airbag device 10 is stored in the seat back 62 is illustrated, but the accommodating portion 40 may be stored in the headrest 63.

上記実施形態では、エアバッグ２０として複数のパネルを縫製して一体的に形成する構造のものを例示したが、いわゆる一体製織（ｏｎｅ ｐｉｅｃｅ ｗｏｖｅｎ：ＯＰＷ）型のものでもよい。 In the above embodiment, the airbag 20 has a structure in which a plurality of panels are sewn and integrally formed, but a so-called one piece weaving (OPW) type may also be used.

上記実施形態では、支持点４１は、シートバック６２に内蔵されるアーム部材４３に設けられる、すなわち支持点４１の位置をシートバック６２内とする構成を例示したが、上述のとおり支持点４１の位置はできるだけ車両前方側に配置されるのが好ましいので、支持点４１の位置をシートバック６２より車両前方側に配置する構成でもよい。例えば、エアバッグ２０の膨張に伴って、アーム部材４３の先端部がシートバック６２内部から車両前方側に突き出る構造として、これにより支持点４１をシートバック６２より車両前方側に配置できる。また、支持点４１の位置を、エアバッグ２０の展開の段階に応じて段階的に移動させる構成とし、各段階における最適な位置に配置することもできる。 In the above embodiment, the support point 41 is provided on the arm member 43 built in the seat back 62, that is, the position of the support point 41 is inside the seat back 62. Since the position is preferably arranged on the front side of the vehicle as much as possible, the position of the support point 41 may be arranged on the front side of the vehicle from the seat back 62. For example, as the airbag 20 expands, the tip of the arm member 43 protrudes from the inside of the seat back 62 toward the front side of the vehicle, whereby the support point 41 can be arranged on the front side of the vehicle from the seat back 62. Further, the position of the support point 41 may be moved stepwise according to the stage of deployment of the airbag 20, and may be arranged at the optimum position in each stage.

上記実施形態では、タブ部材４２がエアバッグ２０の側方膨張部２２Ａ、２２Ｂに連結される構成を例示したが、タブ部材４２がエアバッグ２０の前方膨張部２３Ａ、２３Ｂに連結される構成でもよい。 In the above embodiment, the configuration in which the tab member 42 is connected to the lateral expansion portions 22A and 22B of the airbag 20 is illustrated, but the tab member 42 may also be connected to the front expansion portions 23A and 23B of the airbag 20. good.

１０ エアバッグ装置
２０ エアバッグ
２１ 後方膨張部
２２Ａ、２２Ｂ 側方膨張部
２３Ａ、２３Ｂ 前方膨張部
２４Ａ、２４Ｂ 拘束部
２５Ａ、２５Ｂ ＥＡ部
３０ インフレータ
４０ 収容部
４１ 支持点
４２ タブ部材（連結部材）
４３ アーム部材
６０ 座席
６１ 座部
６２ シートバック
６３ ヘッドレスト
６４ フレーム
Ｄ 乗員
Ｈ 頭部 10 Airbag device 20 Airbag 21 Rear expansion part 22A, 22B Side expansion part 23A, 23B Front expansion part 24A, 24B Restraint part 25A, 25B EA part 30 Inflator 40 Storage part 41 Support point 42 Tab member (connecting member)
43 Arm member 60 Seat 61 Seat 62 Seat back 63 Headrest 64 Frame D Crew H Head

Claims (2)

インフレータと、
前記インフレータから供給されるガスにより展開するエアバッグと、
座席のシートバックまたはヘッドレストに配置され、前記インフレータによりガスが供給される前の非作動時の前記エアバッグを収容する収容部と、
を備え、
前記エアバッグは、
座席の背面側に展開する後方膨張部と、前記後方膨張部の座席幅方向両側から前方に延びる一対の側方膨張部と、前記一対の側方膨張部から中央側へ延び中央で相互に連結されて乗員の前方を覆う一対の前方膨張部と、を有し、
前記収容部より前記座席の前方側、かつ前記座席の幅方向両側に設けられる一対の支持点と、
前記エアバッグと前記一対の支持点とを連結する連結部材と、
を有し、
前記収容部の前記幅方向両側の方向にそれぞれ配置され、車両前方側に延在する一対のアーム部材を有し、
前記アーム部材は、前記シートバック内のフレームと交差する方向に延在し、前記フレームより前方側に先端部を有し、
前記一対の支持点は、前記一対のアーム部材の前記先端部にそれぞれ設けられ、
前記連結部材は、前記エアバッグと同材料で形成される非膨張のパネルであり、
前記アーム部材は、前記連結部材と異素材で形成され、
前記連結部材の一端は、前記幅方向に沿った中心軸まわりに回転可能に、前記アーム部材の前記先端部に設けられる前記支持点に連結され、
前記アーム部材は、前記エアバッグが前記収容部に収容されている状態、及び、前記エアバッグが前記収容部から展開し膨張されている状態の両方の状態において、前記先端部が前記フレームより車両前方側に配置されるように長手形状の延在方向が保持される、
エアバッグ装置。 Inflator and
An airbag developed by the gas supplied from the inflator and
An accommodating unit located on the seat back or headrest of the seat and accommodating the airbag when it is inactive before being supplied with gas by the inflator.
With
The airbag is
A rear expansion portion that expands to the back side of the seat, a pair of lateral expansion portions that extend forward from both sides of the rear expansion portion in the seat width direction, and a pair of lateral expansion portions that extend toward the center and are connected to each other at the center. Has a pair of anterior inflated parts, which cover the front of the occupant,
A pair of support points provided on the front side of the seat from the accommodating portion and on both sides in the width direction of the seat.
A connecting member that connects the airbag and the pair of support points,
Have,
It has a pair of arm members that are arranged on both sides in the width direction of the accommodating portion and extend to the front side of the vehicle.
The arm member extends in a direction intersecting the frame in the seat back, and has a tip portion on the front side of the frame.
The pair of support points are provided at the tip portions of the pair of arm members, respectively.
The connecting member is a non-expandable panel made of the same material as the airbag.
The arm member is made of a different material from the connecting member.
One end of the connecting member is rotatably connected to the support point provided at the tip of the arm member so as to be rotatable around a central axis along the width direction.
The arm member has a tip portion of the arm member from the frame in both a state in which the airbag is housed in the housing portion and a state in which the airbag is expanded from the housing portion and expanded. The extending direction of the longitudinal shape is maintained so that it is placed on the front side,
Airbag device. 前記連結部材は、前記エアバッグの前記側方膨張部または前記前方膨張部に連結される、
請求項１に記載のエアバッグ装置。 The connecting member is connected to the lateral expansion portion or the front expansion portion of the airbag.
The airbag device according to claim 1.
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JP7507665B2 (en) 2020-11-18 2024-06-28 Ｊｏｙｓｏｎ Ｓａｆｅｔｙ Ｓｙｓｔｅｍｓ Ｊａｐａｎ合同会社 Airbag and airbag device
US11427150B1 (en) * 2021-07-12 2022-08-30 Ford Global Technologies, Llc Seatback supported airbags releasably connected by a buckle and clip
JP2024058413A (en) 2022-10-14 2024-04-25 トヨタ自動車株式会社 Airbag device and occupant protection device

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