JP5999031B2 - Air bag device for rear seat passengers - Google Patents

Air bag device for rear seat passengers Download PDF

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JP5999031B2
JP5999031B2 JP2013120952A JP2013120952A JP5999031B2 JP 5999031 B2 JP5999031 B2 JP 5999031B2 JP 2013120952 A JP2013120952 A JP 2013120952A JP 2013120952 A JP2013120952 A JP 2013120952A JP 5999031 B2 JP5999031 B2 JP 5999031B2
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airbag
rear seat
vehicle
seat occupant
tether
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JP2014237382A (en
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克也 島津
克也 島津
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Toyota Motor Corp
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Description

本発明は、後席乗員用エアバッグ装置に関する。   The present invention relates to a rear seat occupant airbag device.

前席シートバックの背面側にエアバッグを搭載した後席乗員用のエアバッグ装置が開示されている（特許文献１及び特許文献２参照）。また、後席乗員用のエアバッグ装置として、後席前方のルーフ部材にエアバッグ装置を取り付けた構造（特許文献３参照）、センターピラーの下部にエアバッグを収容した構造（特許文献４参照）が開示されている。   An airbag device for a rear seat occupant having an airbag mounted on the back side of the front seat back is disclosed (see Patent Document 1 and Patent Document 2). Further, as an airbag device for a rear seat occupant, a structure in which an airbag device is attached to a roof member in front of the rear seat (see Patent Document 3), and a structure in which an airbag is accommodated in a lower portion of a center pillar (see Patent Document 4). Is disclosed.

特開平４−１６６４５５号公報JP-A-4-166455 特開平４−１６６４５６号公報JP-A-4-166456 特開平１０−２６４７６１号公報JP-A-10-264761 特開２００８−８０９１９号公報JP 2008-80919 A

上記した従来例は、何れも前面衝突時に後席乗員を保護しようとするものである。フロントサイドメンバよりも車幅方向外側での前面衝突（微小ラップ衝突）時や斜衝突時には、後席乗員が、衝突方向に向けて車両進行方向斜め前方へ移動しようとする。しかしながら、上記した従来例では、その対策は考慮されていない。   All of the conventional examples described above are intended to protect the rear seat occupant during a frontal collision. At the time of a frontal collision (minute lap collision) or an oblique collision outside the front side member in the vehicle width direction, the rear seat occupant tends to move obliquely forward in the vehicle traveling direction toward the collision direction. However, in the conventional example described above, the countermeasure is not considered.

本発明は、上記事実を考慮して、微小ラップ衝突や斜衝突時における後席乗員の斜め前方への移動を抑制することを目的とする。   In consideration of the above-described facts, an object of the present invention is to suppress the rearward occupant from moving forward obliquely during a minute lap collision or an oblique collision.

請求項１の発明（後席乗員用エアバッグ装置）は、前席のシートバック又はヘッドレストに搭載され、ガスの供給を受けて後席側に膨張展開するように構成され、膨張展開状態を平面視で見たとき、後席乗員に対向する側に、車幅方向の両端部よりも車両前方側へ凹んだ凹部が形成されるエアバッグと、前記エアバッグの下部に設けられ、前記凹部を跨いで左右の前記両端部同士を連結し、前記エアバッグの膨張展開状態において、水平に対し車両後方側の斜め上方に傾斜しているテザーと、を有する。 The invention according to claim 1 (air bag device for the rear seat occupant) is mounted on the seat back or headrest of the front seat, and is configured to inflate and deploy to the rear seat side upon receipt of gas supply. When viewed visually, an airbag is formed on the side facing the rear seat occupant with a recess recessed toward the front of the vehicle rather than both ends in the vehicle width direction, and the recess is provided at the lower portion of the airbag. The tethers that connect the left and right ends across the straddle and are inclined obliquely upward on the vehicle rear side with respect to the horizontal in the inflated and deployed state of the airbag .

請求項１に記載の後席乗員用エアバッグ装置では、車両の衝突時に、エアバッグが、前席のシートバック又はヘッドレストから車両後方へ向けて膨張展開することにより、後席乗員を拘束する。このエアバッグは、膨張展開状態を平面視で見たとき、後席乗員に対向する側に、車幅方向の両端部よりも車両前方側へ凹んだ凹部が形成される。微小ラップ衝突や斜衝突時に、この凹部に後席乗員の身体が進入することにより、後席乗員の斜め前方への移動を抑制することができる。またこれによって、後席乗員の腕の車両前方への移動を抑制できるので、上体の慣性質量を低減でき、後席乗員の姿勢変化を抑制できる。
また、後席乗員の一部がテザーに当たり、該テザーを車両前方へ押し込むことにより、エアバッグの両端部が互いに接近するようにすぼまり、後席乗員を拘束する。このため、車両衝突時に後席乗員の移動量が大きくなる場合でも、エアバッグの乗員拘束性を向上させることができる。
更に、エアバッグの膨張展開状態において、テザーが水平に対し車両後方側の斜め上方に傾斜しているので、後席乗員の一部がテザーを押し込む際に、該エアバッグの位置が車両下方側へ変化することを抑制できる。このため、エアバッグにより後席乗員の頭部を適切に拘束することができる。 In the airbag device for the rear seat occupant according to the first aspect , at the time of the collision of the vehicle, the airbag is inflated and deployed toward the rear of the vehicle from the seat back or the headrest of the front seat, thereby restraining the rear seat occupant. When the airbag is inflated and deployed in a plan view, a recess is formed on the side facing the rear seat occupant that is recessed toward the front side of the vehicle from both ends in the vehicle width direction. When the body of the rear seat occupant enters the concave portion at the time of a minute lap collision or an oblique collision, the rear seat occupant can be prevented from moving obliquely forward. In addition, since the movement of the arm of the rear seat occupant to the front of the vehicle can be suppressed, the inertial mass of the upper body can be reduced, and the posture change of the rear seat occupant can be suppressed.
In addition, a part of the rear seat occupant hits the tether, and the tether is pushed forward of the vehicle, so that both end portions of the airbag come close to each other and restrain the rear seat occupant. For this reason, even when the movement amount of the rear seat occupant becomes large at the time of a vehicle collision, the occupant restraint of the airbag can be improved.
Further, in the inflated and deployed state of the airbag, since the tether is inclined obliquely upward on the vehicle rear side with respect to the horizontal, when a part of the rear seat occupant pushes the tether, the position of the airbag is on the vehicle lower side. It can suppress changing to. Therefore, the head of the rear seat occupant can be appropriately restrained by the airbag.

請求項２の発明（後席乗員用エアバッグ装置）は、前席のシートバック又はヘッドレストに搭載され、ガスの供給を受けて後席側に膨張展開するように構成され、膨張展開状態を平面視で見たとき、後席乗員に対向する側に、車幅方向の両端部よりも車両前方側へ凹んだ凹部が形成されるエアバッグと、前記エアバッグの下部で、かつ前記エアバッグの膨張展開状態において、後席乗員の膝部と車両前後方向に対向する位置に設けられ、前記凹部を跨いで左右の前記両端部同士を連結するテザーと、を有する。 The invention according to claim 2 (air bag device for the rear seat occupant) is mounted on the seat back or headrest of the front seat, and is configured to inflate and deploy to the rear seat side upon receipt of gas supply. When viewed visually, an airbag in which a recessed portion recessed toward the vehicle front side rather than both ends in the vehicle width direction is formed on the side facing the rear seat occupant, and a lower portion of the airbag and the airbag And a tether that is provided at a position facing the knee portion of the rear seat occupant in the vehicle front-rear direction in the inflated and deployed state and connects the left and right end portions across the recess.

請求項２に記載の後席乗員用エアバッグ装置では、車両の衝突時に、エアバッグが、前席のシートバック又はヘッドレストから車両後方へ向けて膨張展開することにより、後席乗員を拘束する。このエアバッグは、膨張展開状態を平面視で見たとき、後席乗員に対向する側に、車幅方向の両端部よりも車両前方側へ凹んだ凹部が形成される。微小ラップ衝突や斜衝突時に、この凹部に後席乗員の身体が進入することにより、後席乗員の斜め前方への移動を抑制することができる。またこれによって、後席乗員の腕の車両前方への移動を抑制できるので、上体の慣性質量を低減でき、後席乗員の姿勢変化を抑制できる。
また、後席乗員の一部がテザーに当たり、該テザーを車両前方へ押し込むことにより、エアバッグの両端部が互いに接近するようにすぼまり、後席乗員を拘束する。このため、車両衝突時に後席乗員の移動量が大きくなる場合でも、エアバッグの乗員拘束性を向上させることができる。
更に、エアバッグの膨張展開状態において、テザーが後席乗員の膝部と車両前後方向に対向する位置に設けられているので、該膝部がテザーを安定して押し込むことができる。このため、エアバッグの乗員拘束性を更に向上させることができる。 In the airbag device for a rear seat occupant described in claim 2 , at the time of a vehicle collision, the airbag is inflated and deployed from the front seat back or headrest toward the rear of the vehicle, thereby restraining the rear seat occupant. When the airbag is inflated and deployed in a plan view, a recess is formed on the side facing the rear seat occupant that is recessed toward the front side of the vehicle from both ends in the vehicle width direction. When the body of the rear seat occupant enters the concave portion at the time of a minute lap collision or an oblique collision, the rear seat occupant can be prevented from moving obliquely forward. In addition, since the movement of the arm of the rear seat occupant to the front of the vehicle can be suppressed, the inertial mass of the upper body can be reduced, and the posture change of the rear seat occupant can be suppressed.
In addition, a part of the rear seat occupant hits the tether, and the tether is pushed forward of the vehicle, so that both end portions of the airbag come close to each other and restrain the rear seat occupant. For this reason, even when the movement amount of the rear seat occupant becomes large at the time of a vehicle collision, the occupant restraint of the airbag can be improved.
Further, since the tether is provided at a position facing the knee portion of the rear seat occupant in the vehicle front-rear direction in the inflated and deployed state of the airbag, the knee portion can stably push the tether. For this reason, the passenger | crew restraint property of an airbag can further be improved.

請求項３の発明は、前席のシートバック又はヘッドレストに搭載され、ガスの供給を受けて後席側に膨張展開するように構成され、膨張展開状態を平面視で見たとき、後席乗員に対向する側に、車幅方向の両端部よりも車両前方側へ凹んだ凹部が形成されるエアバッグを有し、前記凹部の幅は、上部側が下部側よりも広い。 The invention according to claim 3 is mounted on the seat back or headrest of the front seat and is configured to inflate and deploy to the rear seat side upon receipt of gas supply. When the inflated and deployed state is viewed in plan view, the rear seat occupant On the side facing the vehicle, there is an airbag in which a recess recessed toward the vehicle front side is formed from both ends in the vehicle width direction. The width of the recess is wider on the upper side than on the lower side.

請求項３に記載の後席乗員用エアバッグ装置では、車両の衝突時に、エアバッグが、前席のシートバック又はヘッドレストから車両後方へ向けて膨張展開することにより、後席乗員を拘束する。このエアバッグは、膨張展開状態を平面視で見たとき、後席乗員に対向する側に、車幅方向の両端部よりも車両前方側へ凹んだ凹部が形成される。微小ラップ衝突や斜衝突時に、この凹部に後席乗員の身体が進入することにより、後席乗員の斜め前方への移動を抑制することができる。またこれによって、後席乗員の腕の車両前方への移動を抑制できるので、上体の慣性質量を低減でき、後席乗員の姿勢変化を抑制できる。
また、凹部の幅について、上部側が下部側よりも広いので、微小ラップ衝突や斜衝突時に、後席乗員の頭部を広い範囲で拘束することができる。 In the airbag device for a rear seat occupant described in claim 3 , at the time of a vehicle collision, the airbag is inflated and deployed toward the rear of the vehicle from the seat back or the headrest of the front seat, thereby restraining the rear seat occupant. When the airbag is inflated and deployed in a plan view, a recess is formed on the side facing the rear seat occupant that is recessed toward the front side of the vehicle from both ends in the vehicle width direction. When the body of the rear seat occupant enters the concave portion at the time of a minute lap collision or an oblique collision, the rear seat occupant can be prevented from moving obliquely forward. In addition, since the movement of the arm of the rear seat occupant to the front of the vehicle can be suppressed, the inertial mass of the upper body can be reduced, and the posture change of the rear seat occupant can be suppressed.
Moreover, since the upper part side is wider than the lower part side about the width | variety of a recessed part, the head of a rear-seat passenger | crew can be restrained in a wide range at the time of a micro lap collision or a diagonal collision.

請求項４の発明は、前席のシートバック又はヘッドレストに搭載され、ガスの供給を受けて後席側に膨張展開するように構成され、膨張展開状態を平面視で見たとき、後席乗員に対向する側に、車幅方向の両端部よりも車両前方側へ凹んだ凹部が形成されるエアバッグと、前記エアバッグの下部に設けられ、前記凹部を跨いで左右の前記両端部同士を連結するテザーと、を有し、前記エアバッグは、前記凹部の車両前方側に位置する中央チャンバと、前記凹部の車幅方向両側に位置する側部チャンバとを有し、前記中央チャンバは、内部テザーにより上室と下室に区画され、該下室に対してガスが供給されるように構成され、前記内部テザーには、前記下室から前記上室へガスを供給するための通気孔が設けられ、前記側部チャンバは、前記下室と連通している。 The invention according to claim 4 is mounted on the seat back or headrest of the front seat, is configured to inflate and deploy to the rear seat side upon receipt of gas supply, and when the inflated and deployed state is viewed in plan view, On the side facing the vehicle, an airbag formed with a recess recessed toward the vehicle front side from both ends in the vehicle width direction, and provided at the lower portion of the airbag, the left and right end portions straddling the recess The airbag has a central chamber located on the vehicle front side of the recess, and side chambers located on both sides in the vehicle width direction of the recess, the central chamber comprising: An internal tether is divided into an upper chamber and a lower chamber, and gas is supplied to the lower chamber, and the internal tether has a vent hole for supplying gas from the lower chamber to the upper chamber And the side chamber is It is in fluid chamber and the communication.

請求項４に記載の後席乗員用エアバッグ装置では、車両の衝突時に、エアバッグが、前席のシートバック又はヘッドレストから車両後方へ向けて膨張展開することにより、後席乗員を拘束する。このエアバッグは、膨張展開状態を平面視で見たとき、後席乗員に対向する側に、車幅方向の両端部よりも車両前方側へ凹んだ凹部が形成される。微小ラップ衝突や斜衝突時に、この凹部に後席乗員の身体が進入することにより、後席乗員の斜め前方への移動を抑制することができる。またこれによって、後席乗員の腕の車両前方への移動を抑制できるので、上体の慣性質量を低減でき、後席乗員の姿勢変化を抑制できる。
また、後席乗員の一部がテザーに当たり、該テザーを車両前方へ押し込むことにより、エアバッグの両端部が互いに接近するようにすぼまり、後席乗員を拘束する。このため、車両衝突時に後席乗員の移動量が大きくなる場合でも、エアバッグの乗員拘束性を向上させることができる。
更に、エアバッグが膨張展開する際に、まず中央チャンバの下室にガスが供給され、該下室から側部チャンバへガスが供給される。下室から上室へは、内部テザーの通気孔を通じてガスが供給される。このため、早期展開が望まれる下室と側部チャンバを優先的に展開させ、後席乗員の前席に近い部位の拘束と、後席乗員の肩部の拘束に備えることができる。中央チャンバの上室は、主に頭部を拘束する部位であるので、拘束タイミングを比較的遅くしてもよい。 In the airbag device for a rear seat occupant described in claim 4 , at the time of a vehicle collision, the airbag is inflated and deployed from the front seat back or headrest toward the rear of the vehicle, thereby restraining the rear seat occupant. When the airbag is inflated and deployed in a plan view, a recess is formed on the side facing the rear seat occupant that is recessed toward the front side of the vehicle from both ends in the vehicle width direction. When the body of the rear seat occupant enters the concave portion at the time of a minute lap collision or an oblique collision, the rear seat occupant can be prevented from moving obliquely forward. In addition, since the movement of the arm of the rear seat occupant to the front of the vehicle can be suppressed, the inertial mass of the upper body can be reduced, and the posture change of the rear seat occupant can be suppressed.
In addition, a part of the rear seat occupant hits the tether, and the tether is pushed forward of the vehicle, so that both end portions of the airbag come close to each other and restrain the rear seat occupant. For this reason, even when the movement amount of the rear seat occupant becomes large at the time of a vehicle collision, the occupant restraint of the airbag can be improved.
Further, when the airbag is inflated and deployed, gas is first supplied to the lower chamber of the central chamber, and gas is supplied from the lower chamber to the side chamber. Gas is supplied from the lower chamber to the upper chamber through the vent hole of the internal tether. For this reason, it is possible to preferentially deploy the lower chamber and the side chamber for which early deployment is desired, and to prepare for restraint of the portion close to the front seat of the rear seat occupant and restraint of the shoulder portion of the rear seat occupant. Since the upper chamber of the central chamber is a part that mainly restrains the head, the restraining timing may be made relatively late.

請求項１に記載の後席乗員用エアバッグ装置によれば、微小ラップ衝突や斜衝突時における後席乗員の斜め前方への移動を抑制することができる、という優れた効果が得られる。
また、エアバッグの乗員拘束性を向上させることができる、という優れた効果が得られる。
更に、エアバッグにより後席乗員の頭部を適切に拘束することができる、という優れた効果が得られる。 According to the airbag device for a rear seat occupant described in claim 1 , it is possible to obtain an excellent effect that the rear seat occupant can be prevented from moving obliquely forward at the time of a minute lap collision or an oblique collision.
Moreover, the outstanding effect that the passenger | crew restraint property of an airbag can be improved is acquired.
Furthermore, the outstanding effect that the head of a backseat passenger | crew can be restrained appropriately with an airbag is acquired.

請求項２に記載の後席乗員用エアバッグ装置によれば、微小ラップ衝突や斜衝突時における後席乗員の斜め前方への移動を抑制することができる、という優れた効果が得られる。
また、エアバッグの乗員拘束性を向上させることができる、という優れた効果が得られる。
更に、エアバッグの乗員拘束性を更に向上させるができる、という優れた効果が得られる。 According to the airbag device for a rear seat occupant described in claim 2 , it is possible to obtain an excellent effect that the rear seat occupant can be prevented from moving obliquely forward at the time of a minute lap collision or an oblique collision.
Moreover, the outstanding effect that the passenger | crew restraint property of an airbag can be improved is acquired.
Furthermore, the outstanding effect that the passenger | crew restraint property of an airbag can be improved further is acquired.

請求項３に記載の後席乗員用エアバッグ装置によれば、微小ラップ衝突や斜衝突時における後席乗員の斜め前方への移動を抑制することができる、という優れた効果が得られる。
また、微小ラップ衝突や斜衝突時に、後席乗員の頭部を広い範囲で拘束することができる、という優れた効果が得られる。 According to the airbag device for a rear seat occupant described in claim 3 , an excellent effect is obtained that the rear seat occupant can be prevented from moving obliquely forward at the time of a minute lap collision or an oblique collision.
In addition, it is possible to obtain an excellent effect that the head of the rear seat occupant can be restrained in a wide range at the time of a minute lap collision or oblique collision.

請求項４に記載の後席乗員用エアバッグ装置によれば、微小ラップ衝突や斜衝突時における後席乗員の斜め前方への移動を抑制することができる、という優れた効果が得られる。
また、エアバッグの乗員拘束性を向上させることができる、という優れた効果が得られる。
更に、早期展開が望まれる下室と側部チャンバを優先的に展開させ、後席乗員の前席に近い部位の拘束と、後席乗員の肩部の拘束に備えることができる、という優れた効果が得られる。 According to the airbag device for a rear seat occupant described in claim 4 , it is possible to obtain an excellent effect that the rear seat occupant can be prevented from moving obliquely forward at the time of a minute lap collision or an oblique collision.
Moreover, the outstanding effect that the passenger | crew restraint property of an airbag can be improved is acquired.
Furthermore, the lower chamber and the side chamber, which are desired to be deployed early, are preferentially deployed, and it is possible to prepare for restraint of a portion close to the front seat of the rear seat occupant and restraint of the shoulder portion of the rear seat occupant. An effect is obtained.

図１から図３は、第１実施形態に係り、図１はエアバッグが膨張展開した状態を車両中央斜め後方から見た斜視図である。FIG. 1 to FIG. 3 relate to the first embodiment, and FIG. 1 is a perspective view of the airbag inflated and deployed as seen from obliquely rearward of the vehicle center. エアバッグによる後席乗員の拘束状態を示す側面図である。It is a side view which shows the restraint state of the rear seat passenger | crew by an airbag. エアバッグによる後席乗員の拘束状態を示す平面図である。It is a top view which shows the restraint state of the backseat passenger | crew by an airbag. 図４及び図５は、第２実施形態に係り、図４はエアバッグが膨張展開した状態を車両中央斜め後方から見た斜視図である。4 and 5 relate to the second embodiment, and FIG. 4 is a perspective view of the airbag inflated and deployed as viewed obliquely from the rear center of the vehicle. エアバッグによる後席乗員の拘束状態を示す側面図である。It is a side view which shows the restraint state of the rear seat passenger | crew by an airbag. 第３実施形態に係るエアバッグが膨張展開した状態を示す正面図である。It is a front view which shows the state which the airbag which concerns on 3rd Embodiment inflate-deployed. 第４実施形態に係るエアバッグの構造を示す部分破断斜視図である。It is a partially broken perspective view which shows the structure of the airbag which concerns on 4th Embodiment.

以下、本発明を実施するための形態を図面に基づき説明する。   Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

［第１実施形態］
図１，図２において、本実施形態に係る後席乗員用エアバッグ装置１０は、前席１２のシートバック１４に搭載されたエアバッグ１６を有している。このエアバッグ１６は、ガスの供給を受けて後席１８側に膨張展開するように構成されている。エアバッグ１６の膨張展開状態を平面視で見たとき、後席乗員２２に対向する側の例えば車幅方向（シート幅方向）の中央部１６Ｃに、車幅方向の両端部１６Ａよりも車両前方側へ凹んだ凹部１６Ｂが形成される。換言すれば、エアバッグ１６は、膨張展開時に両端部１６Ａが凹部１６Ｂよりも車両後方側へ突出した形状、即ち平面視で略逆Ｕ字形となる。 [First Embodiment]
1 and 2, the airbag device 10 for a rear seat occupant according to the present embodiment includes an airbag 16 mounted on a seat back 14 of the front seat 12. The airbag 16 is configured to be inflated and deployed to the rear seat 18 side upon receipt of gas supply. When the inflated and deployed state of the airbag 16 is viewed in a plan view, the vehicle front side of the vehicle width direction, for example, the center portion 16C in the vehicle width direction (seat width direction), for example, on the side facing the rear seat occupant 22 A recess 16B that is recessed to the side is formed. In other words, the airbag 16 has a shape in which both end portions 16A protrude toward the vehicle rear side from the recessed portion 16B during inflation and deployment, that is, a substantially inverted U shape in plan view.

車幅方向における凹部１６Ｂの最大幅（両端部１６Ａの間隔）は、車両上下方向位置にかかわらず略均一とされている。この最大幅は、後席乗員２２（図２）の肩幅に概ね対応しており、該肩幅よりも大きいことが望ましい。凹部１６Ｂの車両前後方向の深さは、後席乗員２２の頭部２２Ｈがある程度入り込むことができる程度に設定されている。つまり、凹部１６Ｂの形状は、後席乗員２２（図２）の頭部２２Ｈや上体２２Ａの拘束に適した形状となっている。   The maximum width of the recess 16B in the vehicle width direction (interval between both end portions 16A) is substantially uniform regardless of the vehicle vertical direction position. This maximum width generally corresponds to the shoulder width of the rear seat occupant 22 (FIG. 2), and is desirably larger than the shoulder width. The depth of the recess 16B in the vehicle front-rear direction is set such that the head 22H of the rear seat occupant 22 can enter to some extent. That is, the shape of the recess 16B is a shape suitable for restraining the head 22H and the upper body 22A of the rear seat occupant 22 (FIG. 2).

エアバッグ１６の下部には、凹部１６Ｂを跨いで左右の両端部１６Ａ同士を連結するテザー２４が設けられている。このテザー２４は、凹部１６Ｂの輪郭に沿ってエアバッグ１６の両端部１６Ａ及び中央部１６Ｃに連結されており、エアバッグ１６の膨張展開時に、凹部１６Ｂの下部に膜状に展開するようになっている。図２に示されるように、テザー２４は、エアバッグ１６の膨張展開状態において、水平に対し車両後方の斜め上方に傾斜していることが望ましい。後席乗員２２の膝部２２Ｋがテザー２４を押し込んだときに、エアバッグ１６が車両下方へ変位することを抑制できるからである。なお、テザー２４の傾斜は部分的であってもよい。テザー２４の傾斜角度は、車両前後方向位置に応じて変化していてもよい。傾斜の代わりに、テザー２４が側断面において湾曲していてもよい。   A tether 24 is provided at the lower portion of the airbag 16 to connect the left and right ends 16A across the recess 16B. The tether 24 is connected to both end portions 16A and the central portion 16C of the airbag 16 along the contour of the recess 16B, and is deployed in a film shape below the recess 16B when the airbag 16 is inflated and deployed. ing. As shown in FIG. 2, the tether 24 is preferably inclined obliquely upward to the rear of the vehicle with respect to the horizontal in the inflated and deployed state of the airbag 16. This is because when the knee 22K of the rear seat occupant 22 pushes in the tether 24, the airbag 16 can be prevented from being displaced downward in the vehicle. Note that the inclination of the tether 24 may be partial. The inclination angle of the tether 24 may change according to the vehicle longitudinal direction position. Instead of the inclination, the tether 24 may be curved in the side cross section.

通常時のエアバッグ１６は、折り畳まれた状態で、ガスの供給源であるインフレータ２６と共にモジュールケース３２に収納され、前席１２のシートバック１４内に搭載されている。シートバック１４の背面側には、エアバッグ１６の膨張圧により展開するエアバッグドア２８が設けられている。   The airbag 16 in a normal state is stored in a module case 32 together with an inflator 26 serving as a gas supply source in a folded state, and is mounted in the seat back 14 of the front seat 12. On the back side of the seatback 14, an airbag door 28 that is deployed by the inflation pressure of the airbag 16 is provided.

なお、エアバッグ１６が前席１２のシートバック１４に搭載されるものとしたが、これに限られず、エアバッグ１６がヘッドレスト１５に搭載されていてもよい。   In addition, although the airbag 16 shall be mounted in the seat back 14 of the front seat 12, it is not restricted to this, The airbag 16 may be mounted in the headrest 15. FIG.

（作用）
本実施形態は、上記のように構成されており、以下その作用について説明する。図１から図３において、本実施形態に係る後席乗員用エアバッグ装置１０では、車両の衝突時に、インフレータ２６が作動し、膨張用のガスを噴出させる。エアバッグ１６は、このガスの供給を受けて、膨張展開し始める。エアバッグ１６の膨張圧により、エアバッグドア２８が展開することにより、前席１２のシートバック１４から車両後方へ向けてエアバッグ１６が膨張展開する。このエアバッグ１６により、後席乗員２２を拘束することができる。 (Function)
This embodiment is configured as described above, and the operation thereof will be described below. 1 to 3, in the airbag device 10 for a rear seat occupant according to the present embodiment, the inflator 26 is operated to inflate inflation gas when the vehicle collides. The airbag 16 starts to inflate and deploy upon receiving this gas supply. When the airbag door 28 is deployed due to the inflation pressure of the airbag 16, the airbag 16 is inflated and deployed from the seat back 14 of the front seat 12 toward the rear of the vehicle. The airbag 16 can restrain the rear seat occupant 22.

エアバッグ１６の膨張展開状態を平面視で見たとき、後席乗員２２に対向する側には、車幅方向の両端部１６Ａよりも車両前方側へ凹んだ凹部１６Ｂが形成される。微小ラップ衝突や斜衝突時には、この凹部１６Ｂに後席乗員２２の頭部２２Ｈや上体２２Ａが進入することにより、後席乗員２２の斜め前方への移動を抑制することができる。また両端部１６Ａによって後席乗員２２の肩部２２Ｓが拘束されることにより、該後席乗員２２の腕部（図示せず）の車両前方への移動を抑制できるので、上体の慣性質量を低減でき、後席乗員２２の姿勢変化を抑制できる。   When the inflated and deployed state of the airbag 16 is viewed in a plan view, a concave portion 16B that is recessed toward the vehicle front side from both end portions 16A in the vehicle width direction is formed on the side facing the rear seat occupant 22. At the time of a minute lap collision or an oblique collision, the head 22H or the upper body 22A of the rear seat occupant 22 enters the recess 16B, so that the rear seat occupant 22 can be prevented from moving obliquely forward. Further, since the shoulder portion 22S of the rear seat occupant 22 is restrained by the both end portions 16A, the movement of the arm portion (not shown) of the rear seat occupant 22 to the front of the vehicle can be suppressed, so that the inertial mass of the upper body can be reduced. It can reduce, and the posture change of the backseat occupant 22 can be suppressed.

また、エアバッグ１６には、テザー２４が設けられている。図２，図３に示されるように、車両衝突時に後席乗員２２の移動量が大きくなる場合、後席乗員２２の膝部２２Ｋが該テザー２４に当たる。膝部２２Ｋがテザー２４を車両前方へ押し込むことにより、エアバッグ１６の両端部１６Ａが互いに接近して凹部１６Ｂがすぼまり、後席乗員２２を拘束する。これにより、エアバッグ１６によって、後席乗員２２の頭部２２Ｈを、例えば車幅方向の両側から挟むように拘束することができる。このため、車両衝突時に後席乗員２２の移動量が大きくなる場合でも、エアバッグ１６の乗員拘束性を向上させることができる。   The airbag 16 is provided with a tether 24. As shown in FIG. 2 and FIG. 3, when the movement amount of the rear seat occupant 22 increases during a vehicle collision, the knee portion 22 </ b> K of the rear seat occupant 22 hits the tether 24. When the knee portion 22K pushes the tether 24 forward of the vehicle, both end portions 16A of the airbag 16 approach each other, and the recess portion 16B sinks, and the rear seat occupant 22 is restrained. Accordingly, the airbag 16 can restrain the head 22H of the rear seat occupant 22 so as to be sandwiched from both sides in the vehicle width direction, for example. For this reason, even when the amount of movement of the rear seat occupant 22 becomes large at the time of a vehicle collision, the occupant restraint of the airbag 16 can be improved.

図２に示されるように、このテザー２４が、エアバッグ１６の膨張展開状態において、水平に対し車両後方側の斜め上方に傾斜している場合には、後席乗員２２の膝部２２Ｋがテザー２４を押し込む際に、該エアバッグ１６の位置が車両下方側へ変化することを抑制できる。エアバッグ１６を頭部２２Ｈの高さ位置に維持できるため、該頭部２２Ｈをエアバッグ１６によって適切に拘束することができる。   As shown in FIG. 2, when the tether 24 is inclined obliquely upward on the vehicle rear side with respect to the horizontal in the inflated and deployed state of the airbag 16, the knee portion 22 </ b> K of the rear seat occupant 22 is tethered. When pushing in 24, it can suppress that the position of this airbag 16 changes to the vehicle lower side. Since the airbag 16 can be maintained at the height position of the head 22 </ b> H, the head 22 </ b> H can be appropriately restrained by the airbag 16.

［第２実施形態］
図４，図５において、本実施形態に係る後席乗員用エアバッグ装置２０では、テザー２４が、エアバッグ１６の膨張展開状態において、後席乗員２２の膝部２２Ｋと車両前後方向に対向する位置に設けられている。このテザー２４は、例えば帯状に展開した状態となる。テザー２４は、エアバッグ１６の凹部１６Ｂを跨ぐように、両端部１６Ａ同士を車幅方向に連結している。テザー２４と、エアバッグ１６の中央部１６Ｃとは、車両前後方向に離間しており、後席乗員２２の膝部２２Ｋにより、テザー２４を車両前方へ押し込むことができるようになっている。 [Second Embodiment]
4 and 5, in the airbag device 20 for the rear seat occupant according to this embodiment, the tether 24 faces the knee portion 22K of the rear seat occupant 22 in the vehicle front-rear direction when the airbag 16 is inflated and deployed. In the position. The tether 24 is in a state of being developed in a belt shape, for example. The tether 24 connects both end portions 16A in the vehicle width direction so as to straddle the recess 16B of the airbag 16. The tether 24 and the central portion 16C of the airbag 16 are separated from each other in the vehicle front-rear direction, and the tether 24 can be pushed forward by the knee portion 22K of the rear seat occupant 22.

テザー２４は、例えばエアバッグ１６の高さ方向の略中央から下端まで範囲に設けられている。なお、テザー２４を車両上下方向により狭く構成してもよい。エアバッグ１６における凹部１６Ｂの上部は、後席乗員２２の主に頭部２２Ｈが進入する部位であり、該凹部１６Ｂがテザー２４で塞がれないようにする必要がある。このため、テザー２４はエアバッグ１６の下部に設けられている。   The tether 24 is provided, for example, in a range from the approximate center in the height direction of the airbag 16 to the lower end. Note that the tether 24 may be configured to be narrower in the vehicle vertical direction. The upper part of the recessed part 16B in the airbag 16 is a part into which the head 22H mainly enters the rear seat occupant 22, and it is necessary to prevent the recessed part 16B from being blocked by the tether 24. For this reason, the tether 24 is provided in the lower part of the airbag 16.

他の部分については、第１実施形態と同様であるので、同一の部分には図面に同一の符号を付し、説明を省略する。   Since other parts are the same as those in the first embodiment, the same parts are denoted by the same reference numerals in the drawings, and the description thereof is omitted.

（作用）
本実施形態は、上記のように構成されており、以下その作用について説明する。図４，図５において、本実施形態に係る後席乗員用エアバッグ装置２０では、エアバッグ１６の膨張展開状態において、テザー２４が後席乗員２２の膝部２２Ｋと車両前後方向に対向する位置に設けられている。従って、車両衝突時に後席乗員２２の移動量が大きくなる場合、膝部２２Ｋがテザー２４を安定して矢印Ａ方向に押し込むことができる。これにより、エアバッグ１６の両端部１６Ａが互いに接近して凹部１６Ｂがすぼまり、後席乗員２２を拘束する。このため、エアバッグ１６の乗員拘束性を更に向上させることができる。 (Function)
This embodiment is configured as described above, and the operation thereof will be described below. 4 and 5, in the airbag device 20 for the rear seat occupant according to the present embodiment, the position where the tether 24 faces the knee portion 22K of the rear seat occupant 22 in the vehicle front-rear direction when the airbag 16 is inflated and deployed. Is provided. Accordingly, when the movement amount of the rear seat occupant 22 becomes large at the time of a vehicle collision, the knee portion 22K can stably push the tether 24 in the arrow A direction. As a result, both end portions 16A of the airbag 16 approach each other, and the recess 16B is squeezed to restrain the rear seat occupant 22. For this reason, the passenger | crew restraint property of the airbag 16 can further be improved.

［第３実施形態］
図６において、本実施形態に係る後席乗員用エアバッグ装置３０では、エアバッグ１６の凹部１６Ｂの幅について、上部側が下部側よりも広い。凹部１６Ｂの幅とは、例えば、凹部１６Ｂの車両後方側の端部における、左右の両端部１６Ａの車幅方向の内のり寸法である。この凹部１６Ｂの幅は、車両上下方向において直線的に変化しているが、これに限られず、曲線的に変化していてもよく、また段階的に変化していてもよい。 [Third Embodiment]
In FIG. 6, in the airbag device 30 for the rear seat occupant according to the present embodiment, the upper side of the recess 16 </ b> B of the airbag 16 is wider than the lower side. The width of the recess 16B is, for example, the inner dimension in the vehicle width direction of the left and right ends 16A at the end of the recess 16B on the vehicle rear side. The width of the recess 16B changes linearly in the vehicle vertical direction, but is not limited to this, and may change in a curved line or may change in stages.

他の部分については、第１実施形態と同様であるので、同一の部分には図面に同一の符号を付し、説明を省略する。   Since other parts are the same as those in the first embodiment, the same parts are denoted by the same reference numerals in the drawings, and the description thereof is omitted.

（作用）
本実施形態は、上記のように構成されており、以下その作用について説明する。図６において、本実施形態に係る後席乗員用エアバッグ装置３０では、凹部１６Ｂの幅について、上部側が下部側よりも広いので、微小ラップ衝突や斜衝突時に、後席乗員２２の頭部２２Ｈの位置が左右に変化しても、該頭部２２Ｈを広い範囲で拘束することができる。膝部２２Ｋがテザー２４を押した場合、エアバッグ１６の凹部１６Ｂの幅が狭まり、両端部１６Ａが互いに接近して凹部１６Ｂがすぼまるので、頭部２２Ｈを適切に拘束することができる。 (Function)
This embodiment is configured as described above, and the operation thereof will be described below. In FIG. 6, in the airbag device 30 for the rear seat occupant according to the present embodiment, since the upper side is wider than the lower side with respect to the width of the concave portion 16B, the head 22H of the rear seat occupant 22 at the time of minute lap collision or oblique collision. Even if the position of the head changes to the left and right, the head 22H can be restrained in a wide range. When the knee portion 22K pushes the tether 24, the width of the concave portion 16B of the airbag 16 is narrowed, the both end portions 16A approach each other, and the concave portion 16B is recessed, so that the head portion 22H can be restrained appropriately.

［第４実施形態］
図７において、本実施形態に係る後席乗員用エアバッグ装置４０では、エアバッグ１６が、凹部１６Ｂの車両前方側に位置する中央チャンバ３６と、凹部１６Ｂの車幅方向両側に位置する側部チャンバ３８とを有している。中央チャンバ３６は、内部テザー３４により上室３６Ｕと下室３６Ｌに区画されている。側部チャンバ３８は下室３６Ｌと連通しており、側部チャンバ３８と上室３６Ｕとは、例えばシーム４２により区画されている。 [Fourth Embodiment]
7, in the airbag device 40 for the rear seat passenger according to the present embodiment, the airbag 16 includes a central chamber 36 positioned on the vehicle front side of the recess 16B, and side portions positioned on both sides of the recess 16B in the vehicle width direction. Chamber 38. The central chamber 36 is divided into an upper chamber 36U and a lower chamber 36L by an internal tether 34. The side chamber 38 communicates with the lower chamber 36L, and the side chamber 38 and the upper chamber 36U are partitioned by, for example, a seam 42.

インフレータ２６は、下室３６Ｌ側に設けられており、該インフレータ２６からのガスは、下室３６Ｌに対して供給されるように構成されている。テザー２４は、下室３６Ｌに対応する高さ位置に設けられており、下室３６Ｌが早期に膨張展開することにより、テザー２４が速やかに展開するようになっている。内部テザー３４には、下室３６Ｌから上室３６Ｕへガスを供給するための通気孔３４Ａが設けられている。   The inflator 26 is provided on the lower chamber 36L side, and the gas from the inflator 26 is configured to be supplied to the lower chamber 36L. The tether 24 is provided at a height position corresponding to the lower chamber 36L, and the tether 24 is rapidly deployed when the lower chamber 36L is inflated and deployed at an early stage. The internal tether 34 is provided with a vent hole 34A for supplying gas from the lower chamber 36L to the upper chamber 36U.

なお、エアバッグ１６の各室を区画する手段は、内部テザー３４やシーム４２に限られず、適宜変更することが可能である。下室３６Ｌから側部チャンバ３８への経路の断面積や、通気孔３４Ａの開口面積は、各室の容量や展開タイミング等を考慮して設定される。   Note that the means for partitioning each chamber of the airbag 16 is not limited to the internal tether 34 or the seam 42, and can be changed as appropriate. The cross-sectional area of the path from the lower chamber 36L to the side chamber 38 and the opening area of the vent hole 34A are set in consideration of the capacity of each chamber, the deployment timing, and the like.

他の部分については、第１実施形態と同様であるので、同一の部分には図面に同一の符号を付し、説明を省略する。   Since other parts are the same as those in the first embodiment, the same parts are denoted by the same reference numerals in the drawings, and the description thereof is omitted.

（作用）
本実施形態は、上記のように構成されており、以下その作用について説明する。図７において、本実施形態に係る後席乗員用エアバッグ装置４０では、エアバッグ１６が膨張展開する際に、まずインフレータ２６からのガスが、中央チャンバ３６の下室３６Ｌに供給され、該下室３６Ｌから側部チャンバ３８へ矢印Ｓ方向にガスが供給される。下室３６Ｌから上室３６Ｕへは、内部テザー３４の通気孔３４Ａを通じてガスが矢印Ｕ方向に供給される。このため、後席乗員２２と前席１２との隙間が狭いことから早期展開が望まれる下室３６Ｌ及びテザー２４と、側部チャンバ３８とを優先的に展開させ、後席乗員２２の前席１２に近い部位、例えば膝部２２Ｋの拘束と、該膝部２２Ｋによるテザー２４の押し込みと、後席乗員２２の肩部２２Ｓの拘束とに備えることができる（図２，図３参照）。中央チャンバ３６の上室３６Ｕは、主に頭部２２Ｈ（図２参照）を拘束する部位であるので、拘束タイミングを下室３６Ｌよりも遅くしてもよい。本実施形態は、特に後席乗員２２が前席１２（図２参照）に近い場合に有効である。 (Function)
This embodiment is configured as described above, and the operation thereof will be described below. In the rear seat passenger airbag device 40 according to the present embodiment in FIG. 7, when the airbag 16 is inflated and deployed, gas from the inflator 26 is first supplied to the lower chamber 36 </ b> L of the central chamber 36. Gas is supplied from the chamber 36L to the side chamber 38 in the direction of arrow S. From the lower chamber 36L to the upper chamber 36U, gas is supplied in the direction of arrow U through the vent hole 34A of the internal tether 34. For this reason, since the gap between the rear seat occupant 22 and the front seat 12 is narrow, the lower chamber 36L and the tether 24, which are desired to be deployed early, and the side chamber 38 are preferentially deployed, and the front seat of the rear seat occupant 22 is obtained. 12, for example, the restraint of the knee 22 </ b> K, the pushing of the tether 24 by the knee 22 </ b> K, and the restraint of the shoulder 22 </ b> S of the rear seat occupant 22 (see FIGS. 2 and 3). Since the upper chamber 36U of the central chamber 36 is a portion that mainly restrains the head portion 22H (see FIG. 2), the restraining timing may be set later than that of the lower chamber 36L. This embodiment is particularly effective when the rear seat occupant 22 is close to the front seat 12 (see FIG. 2).

［他の実施形態］
テザー２４は、水平に対し車両後方側の斜め上方に傾斜しているものとしたが、必ずしもこのように傾斜していなくてもよい。テザー２４は、第１実施形態では膜状に設けられ、第２実施形態では帯状に設けられるものとしたが、テザー２４の形状や配置はこれらに限られない。なお、テザー２４自体を省略してもよい。 [Other Embodiments]
Although the tether 24 is inclined obliquely upward on the vehicle rear side with respect to the horizontal, it does not necessarily have to be inclined in this way. In the first embodiment, the tether 24 is provided in a film shape, and in the second embodiment, the tether 24 is provided in a strip shape. However, the shape and arrangement of the tether 24 are not limited thereto. Note that the tether 24 itself may be omitted.

１０ 後席乗員用エアバッグ装置
１２ 前席
１４ シートバック
１５ ヘッドレスト
１６ エアバッグ
１６Ａ 両端部
１６Ｂ 凹部
１６Ｃ 中央部
２０ 後席乗員用エアバッグ装置
２２ 後席乗員
２２Ｋ 膝部
２４ テザー
３０ 後席乗員用エアバッグ装置
３４ 内部テザー
３４Ａ 通気孔
３６ 中央チャンバ
３６Ｌ 下室
３６Ｕ 上室
３８ 側部チャンバ
４０ 後席乗員用エアバッグ装置 DESCRIPTION OF SYMBOLS 10 Rear seat occupant airbag device 12 Front seat 14 Seat back 15 Headrest 16 Air bag 16A Both ends 16B Recessed portion 16C Center portion 20 Rear seat occupant airbag device 22 Rear seat occupant 22K Knee portion 24 Tether 30 Rear seat occupant air Bag device 34 Internal tether 34A Ventilation hole 36 Central chamber 36L Lower chamber 36U Upper chamber 38 Side chamber 40 Rear seat occupant airbag device

Claims (4)

前席のシートバック又はヘッドレストに搭載され、ガスの供給を受けて後席側に膨張展開するように構成され、膨張展開状態を平面視で見たとき、後席乗員に対向する側に、車幅方向の両端部よりも車両前方側へ凹んだ凹部が形成されるエアバッグと、
前記エアバッグの下部に設けられ、前記凹部を跨いで左右の前記両端部同士を連結し、前記エアバッグの膨張展開状態において、水平に対し車両後方側の斜め上方に傾斜しているテザーと、
を有する後席乗員用エアバッグ装置。 It is mounted on the seat back or headrest of the front seat, and is configured to inflate and deploy to the rear seat side upon receiving gas supply.When the inflated and deployed state is viewed in plan view, the vehicle on the side facing the rear seat occupant An airbag in which a recess recessed toward the vehicle front side than both ends in the width direction is formed;
A tether provided at a lower portion of the airbag , connecting the left and right end portions across the recess, and inclined obliquely upward on the vehicle rear side with respect to the horizontal in an inflated and deployed state of the airbag ;
An air bag device for a rear seat occupant having: 前席のシートバック又はヘッドレストに搭載され、ガスの供給を受けて後席側に膨張展開するように構成され、膨張展開状態を平面視で見たとき、後席乗員に対向する側に、車幅方向の両端部よりも車両前方側へ凹んだ凹部が形成されるエアバッグと、
前記エアバッグの下部で、かつ前記エアバッグの膨張展開状態において、後席乗員の膝部と車両前後方向に対向する位置に設けられ、前記凹部を跨いで左右の前記両端部同士を連結するテザーと、
を有する後席乗員用エアバッグ装置。 It is mounted on the seat back or headrest of the front seat, and is configured to inflate and deploy to the rear seat side upon receiving gas supply.When the inflated and deployed state is viewed in plan view, the vehicle on the side facing the rear seat occupant An airbag in which a recess recessed toward the vehicle front side than both ends in the width direction is formed;
A tether that is provided at a lower portion of the airbag and in a position facing the knee portion of the rear seat occupant in the vehicle front-rear direction in the inflated and deployed state of the airbag , and connects the left and right end portions across the recess. When,
An air bag device for a rear seat occupant having: 前席のシートバック又はヘッドレストに搭載され、ガスの供給を受けて後席側に膨張展開するように構成され、膨張展開状態を平面視で見たとき、後席乗員に対向する側に、車幅方向の両端部よりも車両前方側へ凹んだ凹部が形成されるエアバッグを有し、
前記凹部の幅は、上部側が下部側よりも広い後席乗員用エアバッグ装置。 It is mounted on the seat back or headrest of the front seat, and is configured to inflate and deploy to the rear seat side upon receiving gas supply.When the inflated and deployed state is viewed in plan view, the vehicle on the side facing the rear seat occupant It has an airbag in which a recessed portion that is recessed toward the vehicle front side than both ends in the width direction is formed,
The width of the recess is an airbag device for a rear seat occupant whose upper side is wider than the lower side. 前席のシートバック又はヘッドレストに搭載され、ガスの供給を受けて後席側に膨張展開するように構成され、膨張展開状態を平面視で見たとき、後席乗員に対向する側に、車幅方向の両端部よりも車両前方側へ凹んだ凹部が形成されるエアバッグと、
前記エアバッグの下部に設けられ、前記凹部を跨いで左右の前記両端部同士を連結するテザーと、を有し、
前記エアバッグは、前記凹部の車両前方側に位置する中央チャンバと、前記凹部の車幅方向両側に位置する側部チャンバとを有し、
前記中央チャンバは、内部テザーにより上室と下室に区画され、該下室に対してガスが供給されるように構成され、
前記内部テザーには、前記下室から前記上室へガスを供給するための通気孔が設けられ、
前記側部チャンバは、前記下室と連通している後席乗員用エアバッグ装置。 It is mounted on the seat back or headrest of the front seat, and is configured to inflate and deploy to the rear seat side upon receiving gas supply.When the inflated and deployed state is viewed in plan view, the vehicle on the side facing the rear seat occupant An airbag in which a recess recessed toward the vehicle front side than both ends in the width direction is formed;
A tether that is provided at a lower portion of the airbag and connects the left and right end portions across the concave portion;
The airbag has a central chamber located on the vehicle front side of the recess, and side chambers located on both sides in the vehicle width direction of the recess,
The central chamber is divided into an upper chamber and a lower chamber by an internal tether, and gas is supplied to the lower chamber,
The internal tether is provided with a vent for supplying gas from the lower chamber to the upper chamber,
The side chamber is an airbag device for a rear seat occupant communicating with the lower chamber.
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