JP4282838B2 - Vehicle seat - Google Patents

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Publication number
JP4282838B2
JP4282838B2 JP22466299A JP22466299A JP4282838B2 JP 4282838 B2 JP4282838 B2 JP 4282838B2 JP 22466299 A JP22466299 A JP 22466299A JP 22466299 A JP22466299 A JP 22466299A JP 4282838 B2 JP4282838 B2 JP 4282838B2
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Japan
Prior art keywords
seating surface
occupant
width direction
direction member
vehicle
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Expired - Fee Related
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JP22466299A
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JP2001047918A (en
Inventor
裕公 高橋
賢 華山
豊 岡本
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60NSEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42Seats 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
    • B60N2/427Seats or parts thereof displaced during a crash
    • B60N2/42727Seats or parts thereof displaced during a crash involving substantially rigid displacement
    • B60N2/42754Seats or parts thereof displaced during a crash involving substantially rigid displacement of the cushion
    • B60N2/42763Seats or parts thereof displaced during a crash involving substantially rigid displacement of the cushion with anti-submarining systems

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

Description

【0001】
【発明の属する技術分野】
本発明は車両衝突時に乗員の腰部を拘束するのに好適な車両用シートに関する。
【0002】
【従来の技術】
車両衝突時に、乗員が慣性力により前方へ移動しないように、例えば、シートベルトで乗員を拘束する。この拘束の状態を次図で説明する。
図13(a),(b)は従来のシートベルトの拘束状態を説明する説明図である。
(a)は、乗員100がシート101に着座し、腰ベルト102及び肩ベルト103からなるシートベルト104を装着した状態で、衝突時にブレーキペダル105を踏んだ状態を示す。
この時、乗員100は、シートベルト104に確実に拘束される。
【0003】
(b)において、例えば、衝突が激しかったり、シート101を構成するシートバック106を大きく傾けた場合に、乗員100に作用する慣性力によって乗員100が腰ベルト102の下から抜けてシート101を構成するシートクッション107上を滑りながら前方に移動しインストルメントパネル108の下方に潜り込む現象(サブマリン現象)の発生することがある。
【0004】
このような現象を防止するための車両用シートとしては、例えば、▲1▼特開平9−71167号公報「車両用シート」、▲2▼米国特許第5695242号明細書「シート・クッション・リストレイント・システム」に記載されたものが知られている。
【0005】
上記技術▲1▼には、同公報の図9に、衝突時にシートクッション20をトーションバー10の軸回りに前上がりに傾け、着座してシートベルト70を装着した乗員が前方に移動しないようにしたシート1が記載されている。
上記技術▲2▼には、同明細書の図1に、シートクッション11のフロントパート14の下部にエアバッグデバイス13を設け、衝突時にエアバッグデバイス13によってフロントパート14を上昇させ乗員が前方に移動しないようにしたシート10が記載されている。
【0006】
【発明が解決しようとする課題】
上記技術▲1▼では、シートクッション20が前上がりに傾くことで、乗員の脚部、特に膝から下の部分が急激に上昇する。
また、運転席において、衝突後の再衝突に対しては、足がブレーキペダルやアクセルペダルから離れることから再衝突の回避が難しくなる。
上記技術▲2▼についても、フロントパート14が上昇した時に、技術▲1▼と同様のことが言える。
【0007】
そこで、本発明の目的は、車両衝突時に、乗員の前方への移動を防止するとともに、脚部の急激な上昇を防止し、再衝突の回避をも考慮した車両用シートを提供することにある。
【0008】
【課題を解決するための手段】
上記目的を達成するために請求項1は、車両衝突時に乗員が慣性力で前方へ移動するのを防止する車両用シートにおいて、着座した乗員の骨盤の直前位置に対応するシートクッションの着座面を盛り上げるための着座面押し上げ部材と、この着座面押し上げ部材を上昇させるための駆動手段と、この駆動手段の作動を衝突時の車体加速度の変化に基づいて制御する制御部とからなり、着座面押し上げ部材が、シートクッションの内部に設けたベース部に支軸を介してスイング自在に取付けたパイプアームを備え、このパイプアームでは、シートの前後方向に向けて延びる左右一対の後方向部材と、これらの後方向部材の前端同士を接続する左右に延びる前部幅方向部材と、前後方向部材の後端同士を接続する左右に延びる後部幅方向部材とを備え、左右一対の前後方向部材が、側面視くの字状の部材であり、前部幅方向部材が、車両衝突時以外は支軸よりも高い位置に配置され、駆動手段に、前部幅方向部材に取付けられたワイヤを備え、このワイヤを下方に引くことにより前部幅方向部材を下降させることで後部幅方向部材を上昇させる。
【0009】
車両衝突時に、車体加速度の変化に基づいて制御部で駆動手段の作動を制御し、この駆動手段で着座面押し上げ部材を上昇させ、この着座面押し上げ部材で着座した乗員の骨盤の直前位置に対応するシートクッション着座面を盛り上げ、乗員の骨盤の直前位置を拘束する。
【0010】
この結果、車両衝突時に乗員の腰部の移動を抑えることができ、乗員の前方への移動を防止することができる。
また、乗員の腰部の移動が抑えられるために乗員の姿勢が安定することと、従来とは異なって乗員の脚部が跳ね上げられないこととの両方から、足がペダルから離れないので、ペダル操作を確実に行うことができ、再衝突を回避することができる。
【0011】
【発明の実施の形態】
本発明の実施の形態を添付図に基づいて以下に説明する。なお、図面は符号の向きに見るものとする。
図1は本発明に係る車両用シートの斜視図であり、シート10は、乗員が着座するシートクッション11と、背をもたれるシートバック12と、乗員の頭部を受けるためにシートバック12の上部に取付けたヘッドレスト13とからなる。なお、11aはシートクッション11の着座面である。
シートクッション11は、内部に、着座した乗員の腰部を拘束するための着座面突出装置15を備える。
【0012】
図2は本発明に係る車両用シートのシートクッション内部を示す斜視図である。
着座面突出装置15は、シートクッション11(図1参照)の着座面11a(図1参照)を盛り上げるための着座面押し上げ部材16と、この着座面押し上げ部材16を上昇させるための駆動手段17,17と、この駆動手段17,17の作動を衝突時の車体加速度の変化に基づいて制御する制御部18とからなる。なお、19はクッションスプリングである。
【0013】
着座面押し上げ部材16は、シートトレイ21の凸部22,22に取付けたベース部23,23と、このベース部23,23に支軸24,24を介してスイング自在に取付けたパイプアーム25と、このパイプアーム25の後部25a側を下降させるためにベース部23,23内に設けたスプリング(不図示。後述する。)とからなる。なお、23a,23aはパイプアーム25の後部25aの最大スイング位置を規制するためにベース部23,23に設けたストッパである。
【0014】
パイプアーム25の後部25aのスイング範囲は、シートトレイ21の凸部22,22で規制する。
このように、シートトレイ21の剛性の高い凸部22,22に着座面押し上げ部材16を取付けたため、着座面押し上げ部材16に作用する力を十分に支えることができ、また、シートトレイ21の板厚を小さくすることができる。
【0015】
駆動手段17は、シリンダ31と、このシリンダ31内に移動自在に収納した図示せぬピストンと、このピストンに一端を取付けるとともに他端をパイプアーム25の前部25bに取付けたワイヤ32と、このワイヤ32の途中を受けるワイヤ受け33と、シリンダ31内に高圧の燃焼ガスを送るためのインフレータ34とからなる。
【0016】
制御部18は、車体の加速度を検知する車体加速度センサ37と、この車体加速度センサ37からの車体加速度信号ASに基づいて、インフレータ34,34の着火を行うコントロールユニット38とからなる。
【0017】
図3は本発明に係る車両用シートのシートクッションの断面図であり、着座面突出装置15は、シートクッション11の表皮41及びこの表皮41の内側に設けたパッド42の下方に配置したものである。
パイプアーム25は、側面視くの字状の部材であり、車両衝突時以外は、前部25bを高い位置に配置した部材である。
【0018】
ワイヤ32は、車両衝突時以外は、常に張った状態にして、車両衝突時にパイプアーム25の動作の遅れが生じないようにするものである。
ワイヤ受け33は、ワイヤ32を通すワイヤ溝44を形成した部材であり、このワイヤ溝44をワイヤ32が滑る。
【0019】
このワイヤ受け33は、上記したように、ワイヤ32が滑る構造でなくてもよく、例えばワイヤ32が巻き付くプーリであってもよく、要はワイヤ32がスムーズに移動すればよい。
45は、前述したパイプアーム25の後部25aを車両衝突前に下降させておく、即ち、シートトレイ21の凸部22にパイプアーム25の後部25aを押し付けておくスプリングである。
【0020】
以上に述べた着座面突出装置15の作用を次に説明する。
図4は本発明に係る車両用シートの着座面突出装置の作用を説明する作用図である。
車両が衝突すると、図2に示した車体加速度センサ37からの車体加速度信号ASに基づいて、コントロールユニット38はインフレータ34,34を着火させる。これにより、インフレータ34,34内の火薬が燃焼する。
この結果、図4において、シリンダ31内に燃焼ガスが流入し、シリンダ31内のピストンが高速で移動する。
【0021】
これに伴って、ピストンに取付けたワイヤ32が引かれ、パイプアーム25の前部25bが下降する。そして、パイプアーム25の後部25aが上昇し、パッド42及び表皮41を押し上げ、着座面11aを高さUだけ盛り上げる。
【0022】
図5は本発明に係る車両用シートにおける乗員の着座状態を説明する説明図であり、図3に示した着座面突出装置15の状態に対応するものである。
乗員は、腰ベルト46及び肩ベルト47からなるシートベルト48で、腰部及び上半身が拘束される。
51は乗員の骨盤、52は骨盤51を構成する恥骨である。
【0023】
以上に述べた車両用シート10の作用を次に説明する。
図6は本発明に係る車両用シートの作用を説明する作用図であり、図4に示した着座面突出装置15の状態に対応するものである。
車両衝突によって着座面突出装置15が作動すると、シートクッション11の着座面11aが盛り上がる。
【0024】
この盛り上がり部分Aは、着座した乗員の骨盤51、即ち恥骨52の直前位置に対応するシートクッション着座面である。
即ち、着座面突出装置15は、シートクッション着座面11aにおける乗員の骨盤51の直前位置に高剛性部を形成するためのものである。
【0025】
以上説明したように、本発明は、車両衝突時に乗員が慣性力で前方へ移動するのを防止する車両用シート10において、着座した乗員の骨盤51の直前位置に対応するシートクッション着座面11aを盛り上げるための図2に示した着座面押し上げ部材16と、この着座面押し上げ部材16を上昇させるための駆動手段17と、この駆動手段17の作動を衝突時の車体加速度の変化に基づいて制御する制御部18とからなる。
【0026】
上記構成により、図6において、車両衝突時にシートクッション着座面11aを盛り上げることで、乗員の腰部を拘束することによって、乗員の腰部の移動を抑えることができ、乗員の前方への移動を防止することができる。従って、たとえ、衝突が激しかったり、衝突前にシートバック12の傾き角を大きくした姿勢をとっていたとしても、腰ベルト46の下からシートクッション11上を滑るようなサブマリン現象が発生することを防止することができる。
【0027】
また、乗員の腰部の移動が抑えられるために乗員の姿勢が安定することと、従来とは異なって乗員の脚部が跳ね上げられないこととの両方から、足がペダルから離れないので、ペダル操作を確実に行うことができ、再衝突を回避することができる。
【0028】
図7は着座面突出装置の比較例を説明する説明図であり、着座面突出装置110は、シートトレイ111に取付けたベース部112と、このベース部112に支軸113を介して回転自在に取付けたパイプアーム114とからなり、パイプアーム114の前部115でシートクッション116の着座面117を盛り上げるものである。
即ち、着座面突出装置110は、パイプアーム114の回転中心である支軸113を、着座面117を盛り上げる前部115よりも後方に配置したものである。
【0029】
この比較例では、乗員からパイプアーム114の前部115に前向きの力Fが作用すると、この力Fによって、パイプアーム114の曲げ部(支軸113に近い部分)から変形し易く、乗員の腰部の拘束に対しては不利となる。
また、パイプアーム114の前部115を跳ね上げた後、その位置を保つための特別な保持部材が必要になる。
【0030】
上記比較例に対して、図6に示した本発明の着座面突出装置15は、パイプアーム25の回転中心である支軸24を、着座面11aを盛り上げる後部25aよりも前方に配置したものである。
本発明では、図6に示したように、乗員からパイプアーム25の後部25aに前向きの力Fが作用すると、この力Fをベース部23のストッパ23aで受けることができ、パイプアーム25の変形を抑えることができる。
また、ストッパ23aを設けたことで、パイプアーム25を跳ね上げた後に、その位置を保つための特別な保持部材は不要である。
【0031】
このように、着座面突出装置15のパイプアーム25の後部25aよりも前方に支軸24を配置することで、衝突時に乗員からパイプアーム25に作用する力によって、乗員の腰部の拘束をより強めることができ、好ましい。
【0032】
図8は本発明に係る車両用シートの着座面突出装置の別の実施の形態を示す斜視図であり、着座面突出装置60は、シートトレイ61に取付けた固定軸62と、この固定軸62に回転自在に取付けたプーリ63,63と、これらのプーリ63,63にブラケット64,64を介して取付けたパイプアーム65と、プーリ63,63に巻いたワイヤ66,66と、このワイヤ66,66を引き込むためのシリンダ67,67とからなる。なお、シリンダ67,67に燃焼ガスを供給するインフレータ及びこのインフレータに着火するための制御部は図2で説明したものと同一であり、説明を省略する。
【0033】
車両が衝突した時には、シリンダ67,67内に供給された高圧の燃料ガスによってシリンダ67,67内の図示せぬピストンが移動し、ワイヤ66,66を引き込むことでプーリ63,63を回転させ、パイプアーム65を想像線で示す位置から実線で示す位置までスイングさせ、図3に示したシートクッション11の着座面11aを盛り上げる。
【0034】
図9は本発明に係る車両用シートの着座面突出装置の別の実施の形態(図8の例)の変形例を示す斜視図であり、着座面突出装置69は、図8に示した着座面突出装置60に対してシリンダ67,67の位置を固定軸62の前方位置から後方位置へ変更した装置である。
【0035】
図10は本発明に係る車両用シートの着座面突出装置の更なる別の実施の形態を示す斜視図であり、着座面突出装置70は、シートトレイ71の側壁72,72にそれぞれ設けたシリンダ73,73(奥側の符号73は不図示)と、このシリンダ73,73内に移動自在に収納したそれぞれのピストン(不図示)間に渡したメインワイヤ74と、このメインワイヤ74の中央部より外側寄りの部分とシートトレイ71の側壁72,72とにそれぞれ渡したサブワイヤ75,75と、シリンダ73,73近傍の側壁72,72に取付けたワイヤロック部76,76とからなる。なお、77はメインワイヤ74の中央部に被せたカラーである。
【0036】
ここで、シリンダ73,73に燃焼ガスを供給するインフレータ及びこのインフレータに着火するための制御部は図2で説明したものと同一であり、説明を省略する。
図の着座面突出装置70は、作動前の状態であり、メインワイヤ74及びサブワイヤ75,75はたるんだ状態にある。
【0037】
図11は本発明に係る車両用シートの着座面突出装置の更なる別の実施の形態(図10の例)の作用図である。
着座面突出装置70において、車両が衝突した場合には、シリンダ73,73に高圧の燃焼ガスを供給する。
これにより、シリンダ73,73内のそれぞれのピストンが高速で移動し、これに伴ってピストンがメインワイヤ74及びサブワイヤ75,75を張る。
この結果、図3に示したシートクッション11の着座面11aを盛り上げる。
【0038】
図12(a),(b)は図11に示したワイヤロック部の断面図である。
(a)は、メインワイヤ74を張った直後の状態を示す。
ワイヤロック部76は、シートトレイ71(図11参照)の側壁72(図11参照)に取付けたケース81と、このケース81に取付けた支軸82と、この支軸82に回転自在に取付けるとともにメインワイヤ74を掛けたローラ部材83と、このローラ部材83に取付けた可動歯84と、この可動歯84と対になってメインワイヤ74を噛み込むためにケース81に固定した固定歯85と、可動歯84のためのストッパ86とからなる。
【0039】
(b)において、メインワイヤ74を張った後にメインワイヤ74の中央部に乗員からの力が作用して、メインワイヤ74が内側に引張られると、ローラ部材83が回転し、可動歯84は、固定歯85との間にメインワイヤ74を噛み込む。これによって、メインワイヤ74はロックされ、メインワイヤ74のたるみを防止することができる。
【0040】
尚、本発明では、図2に示したように、着座面押し上げ部材16として、パイプアーム25をスイングさせる構造のものを例示したが、これに限らず、例えば、棒状の部材を直線運動させたり、カム状の部材を回転させたり、球状の部材を上下動させたりしてもよく、要は着座面11a(図3参照)を盛り上げるものであればよい。
【0041】
また、本発明では、駆動手段17として、シリンダ31とインフレータ34との組合わせのものを例示したが、これに限らず、例えば、電磁石による駆動、ガスタンク、アキュムレータからの高圧ガス供給による駆動によるものでもよい。
【0042】
【発明の効果】
本発明は上記構成により次の効果を発揮する。
請求項1の車両用シートは、着座した乗員の骨盤の直前位置に対応するシートクッションの着座面を盛り上げるための着座面押し上げ部材と、この着座面押し上げ部材を上昇させるための駆動手段と、この駆動手段の作動を衝突時の車体加速度の変化に基づいて制御する制御部とからなり、着座面押し上げ部材が、シートクッションの内部に設けたベース部に支軸を介してスイング自在に取付けたパイプアームを備え、このパイプアームでは、シートの前後方向に向けて延びる左右一対の後方向部材と、これらの後方向部材の前端同士を接続する左右に延びる前部幅方向部材と、前後方向部材の後端同士を接続する左右に延びる後部幅方向部材とを備え、左右一対の前後方向部材が、側面視くの字状の部材であり、前部幅方向部材が、車両衝突時以外は支軸よりも高い位置に配置され、駆動手段に、前部幅方向部材に取付けられたワイヤを備え、このワイヤを下方に引くことにより前部幅方向部材を下降させることで後部幅方向部材を上昇させるので、車両衝突時に乗員の腰部の移動を抑えることができ、乗員の前方への移動を防止することができる。
【0043】
また、乗員の腰部の移動が抑えられるために乗員の姿勢が安定することと、従来とは異なって乗員の脚部が跳ね上げられないこととの両方から、足がペダルから離れないので、ペダル操作を確実に行うことができて、再衝突を回避することができる。
【図面の簡単な説明】
【図1】本発明に係る車両用シートの斜視図
【図2】本発明に係る車両用シートのシートクッション内部を示す斜視図
【図3】本発明に係る車両用シートのシートクッションの断面図
【図4】本発明に係る車両用シートの着座面突出装置の作用を説明する作用図
【図5】本発明に係る車両用シートにおける乗員の着座状態を説明する説明図
【図6】本発明に係る車両用シートの作用を説明する作用図
【図7】着座面突出装置の比較例を説明する説明図
【図8】本発明に係る車両用シートの着座面突出装置の別の実施の形態を示す斜視図
【図9】本発明に係る車両用シートの着座面突出装置の別の実施の形態(図8の例)の変形例を示す斜視図
【図10】本発明に係る車両用シートの着座面突出装置の更なる別の実施の形態を示す斜視図
【図11】本発明に係る車両用シートの着座面突出装置の更なる別の実施の形態(図10の例)の作用図
【図12】図11に示したワイヤロック部の断面図
【図13】従来のシートベルトの拘束状態を説明する説明図
【符号の説明】
10…車両用シート、11…シートクッション、11a…シートクッションの着座面、15,60,69,70…着座面突出装置、16…着座面押し上げ部材、17…駆動手段、18…制御部、23…ベース部、24…支軸、25…パイプアーム、25a…後部幅方向部材(パイプアームの後部)、25b…前部幅方向部材(パイプアームの前部)、32…ワイヤ、42…パッド、51…骨盤。
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle seat suitable for restraining an occupant's lower back during a vehicle collision.
[0002]
[Prior art]
In order to prevent the occupant from moving forward due to inertial force when the vehicle collides, for example, the occupant is restrained by a seat belt. The state of this constraint will be described with reference to the next figure.
FIGS. 13A and 13B are explanatory views for explaining a restraint state of a conventional seat belt.
(A) shows a state in which the occupant 100 is seated on the seat 101 and is stepping on the brake pedal 105 at the time of collision in a state where the seat belt 104 including the waist belt 102 and the shoulder belt 103 is worn.
At this time, the occupant 100 is reliably restrained by the seat belt 104.
[0003]
In (b), for example, when the collision is severe or the seat back 106 that constitutes the seat 101 is greatly inclined, the occupant 100 is pulled out from below the waist belt 102 by the inertial force acting on the occupant 100 to constitute the seat 101. There is a case where a phenomenon (submarine phenomenon) occurs in which the vehicle moves forward while sliding on the seat cushion 107 and submerges under the instrument panel 108.
[0004]
As a vehicle seat for preventing such a phenomenon, for example, (1) Japanese Patent Laid-Open No. 9-71167 “Vehicle Seat”, (2) US Pat. No. 5,695,242 “Seat Cushion Restrain” What is described in "System" is known.
[0005]
In the technique {circle around (1)}, in FIG. 9 of the same publication, the seat cushion 20 is tilted forwardly about the axis of the torsion bar 10 at the time of collision, so that the passenger seated and seated with the seat belt 70 does not move forward. A sheet 1 is described.
In the technique {circle around (2)}, an airbag device 13 is provided in the lower part of the front part 14 of the seat cushion 11 in FIG. 1 of the same specification, and the front part 14 is raised by the airbag device 13 in the event of a collision so that the occupant moves forward. A sheet 10 that is prevented from moving is described.
[0006]
[Problems to be solved by the invention]
In the technique {circle around (1)}, the seat cushion 20 is tilted forward and the occupant's legs, particularly the lower part from the knee, rises rapidly.
Further, in the driver's seat, for a re-collision after a collision, it is difficult to avoid the re-collision because the foot is separated from the brake pedal or the accelerator pedal.
The same can be said for the technique (2) when the front part 14 is raised.
[0007]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vehicle seat that prevents the occupant from moving forward in the event of a vehicle collision, prevents the legs from abruptly rising, and avoids re-collisions. .
[0008]
[Means for Solving the Problems]
In order to achieve the above object, claim 1 is a vehicle seat for preventing a passenger from moving forward due to inertial force at the time of a vehicle collision. The seating surface push-up member for raising the seat, the driving means for raising the seating surface push-up member, and the control unit for controlling the operation of the driving means based on the change of the vehicle body acceleration at the time of the collision, member comprises a pipe arm mounted swingably via a support shaft on the base portion provided in the seat cushion, in this pipe arm, and the front-rear direction member pair that extends in the longitudinal direction of the seat, the front width direction member extending in the left-to-right to connect the front ends of these front-rear direction member, the rear width direction member extending in the left-to-right to connect the rear ends of the front-rear direction member Comprising a pair of left and right front-rear direction member is a shaped member of rather a side view, a front width direction member, except during a vehicle collision is located at a position higher than the support shaft, to the drive means, the front comprising a wire attached to a width direction member, Ru is raised rear width direction member by lowering the front width direction member by pulling the wire downwards.
[0009]
In the event of a vehicle collision, the controller controls the operation of the drive means based on the change in the vehicle body acceleration, and the drive means raises the seating surface push-up member, corresponding to the position immediately before the pelvis of the occupant seated by this seating face push-up member Raise the seat cushion seating surface and restrain the position just before the pelvis of the occupant.
[0010]
As a result, it is possible to suppress the movement of the occupant's waist during a vehicle collision, and to prevent the occupant from moving forward.
In addition, since the movement of the waist of the occupant is suppressed, the posture of the occupant is stabilized and the leg of the occupant cannot be lifted up unlike the conventional case, so the foot does not come off the pedal. The operation can be performed reliably, and re-collision can be avoided.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a perspective view of a vehicle seat according to the present invention. A seat 10 includes a seat cushion 11 on which an occupant is seated, a seat back 12 on a back, and an upper portion of the seat back 12 for receiving the head of the occupant. The headrest 13 is attached to the headrest 13. Reference numeral 11a denotes a seating surface of the seat cushion 11.
The seat cushion 11 includes a seating surface protrusion device 15 for restraining the seated occupant's waist.
[0012]
FIG. 2 is a perspective view showing the inside of the seat cushion of the vehicle seat according to the present invention.
The seating surface protruding device 15 includes a seating surface push-up member 16 for raising the seating surface 11a (see FIG. 1) of the seat cushion 11 (see FIG. 1), and driving means 17 for raising the seating surface push-up member 16. 17 and a control unit 18 that controls the operation of the driving means 17 and 17 based on a change in vehicle body acceleration at the time of a collision. Reference numeral 19 denotes a cushion spring.
[0013]
The seating surface push-up member 16 includes base portions 23 and 23 attached to the convex portions 22 and 22 of the sheet tray 21, and a pipe arm 25 attached to the base portions 23 and 23 through the support shafts 24 and 24 so as to be swingable. The pipe arm 25 includes springs (not shown, which will be described later) provided in the base portions 23 and 23 for lowering the rear portion 25a side. 23a and 23a are stoppers provided on the base portions 23 and 23 in order to regulate the maximum swing position of the rear portion 25a of the pipe arm 25.
[0014]
The swing range of the rear portion 25 a of the pipe arm 25 is restricted by the convex portions 22 and 22 of the sheet tray 21.
As described above, since the seating surface pushing-up member 16 is attached to the highly rigid convex portions 22 and 22 of the sheet tray 21, the force acting on the seating surface pushing-up member 16 can be sufficiently supported, and the plate of the sheet tray 21 can be supported. The thickness can be reduced.
[0015]
The driving means 17 includes a cylinder 31, a piston (not shown) that is movably accommodated in the cylinder 31, a wire 32 having one end attached to the piston and the other end attached to the front portion 25b of the pipe arm 25, It consists of a wire receiver 33 for receiving the midway of the wire 32 and an inflator 34 for sending high-pressure combustion gas into the cylinder 31.
[0016]
The control unit 18 includes a vehicle body acceleration sensor 37 that detects the acceleration of the vehicle body, and a control unit 38 that ignites the inflators 34 and 34 based on the vehicle body acceleration signal AS from the vehicle body acceleration sensor 37.
[0017]
FIG. 3 is a cross-sectional view of the seat cushion of the vehicle seat according to the present invention, and the seating surface protruding device 15 is disposed below the skin 41 of the seat cushion 11 and the pad 42 provided inside the skin 41. is there.
The pipe arm 25 is a U-shaped member in a side view, and is a member in which the front portion 25b is arranged at a high position except during a vehicle collision.
[0018]
The wire 32 is always stretched except during a vehicle collision so as not to cause a delay in the operation of the pipe arm 25 during the vehicle collision.
The wire receiver 33 is a member in which a wire groove 44 through which the wire 32 passes is formed, and the wire 32 slides in the wire groove 44.
[0019]
As described above, the wire receiver 33 may not have a structure in which the wire 32 slides. For example, the wire receiver 33 may be a pulley around which the wire 32 is wound. In short, the wire 32 only needs to move smoothly.
Reference numeral 45 denotes a spring that lowers the rear portion 25a of the pipe arm 25 described above before a vehicle collision, that is, presses the rear portion 25a of the pipe arm 25 against the convex portion 22 of the sheet tray 21.
[0020]
Next, the operation of the seating surface protruding device 15 described above will be described.
FIG. 4 is an operation diagram for explaining the operation of the vehicle seat seating surface protrusion device according to the present invention.
When the vehicle collides, the control unit 38 ignites the inflators 34 and 34 based on the vehicle body acceleration signal AS from the vehicle body acceleration sensor 37 shown in FIG. Thereby, the explosives in the inflators 34 and 34 burn.
As a result, in FIG. 4, the combustion gas flows into the cylinder 31, and the piston in the cylinder 31 moves at a high speed.
[0021]
Along with this, the wire 32 attached to the piston is pulled, and the front portion 25b of the pipe arm 25 is lowered. Then, the rear portion 25a of the pipe arm 25 rises, pushes up the pad 42 and the skin 41, and raises the seating surface 11a by the height U.
[0022]
FIG. 5 is an explanatory view for explaining the seating state of the occupant in the vehicle seat according to the present invention, and corresponds to the state of the seating surface protruding device 15 shown in FIG.
The occupant is restrained at the waist and upper body by a seat belt 48 including a waist belt 46 and a shoulder belt 47.
51 is the pelvis of the occupant and 52 is the pubic bone constituting the pelvis 51.
[0023]
Next, the operation of the vehicle seat 10 described above will be described.
FIG. 6 is an operation diagram for explaining the operation of the vehicle seat according to the present invention, and corresponds to the state of the seating surface protruding device 15 shown in FIG.
When the seating surface protruding device 15 is activated by a vehicle collision, the seating surface 11a of the seat cushion 11 is raised.
[0024]
The raised portion A is a seat cushion seating surface corresponding to the position immediately before the pelvis 51 of the seated occupant, that is, the pubic bone 52.
That is, the seating surface protruding device 15 is for forming a highly rigid portion at a position immediately before the pelvis 51 of the occupant on the seat cushion seating surface 11a.
[0025]
As described above, the present invention provides the seat cushion seating surface 11a corresponding to the position immediately before the pelvis 51 of the seated occupant in the vehicle seat 10 that prevents the occupant from moving forward due to inertial force at the time of a vehicle collision. The seating surface push-up member 16 shown in FIG. 2 for raising, the drive means 17 for raising the seating face push-up member 16, and the operation of the drive means 17 are controlled based on the change in the vehicle body acceleration at the time of collision. And a control unit 18.
[0026]
With the above configuration, in FIG. 6, the seat cushion seating surface 11a is raised at the time of a vehicle collision, thereby restraining the occupant's waist, thereby suppressing the movement of the occupant's waist and preventing the occupant from moving forward. be able to. Therefore, even if the collision is severe or the posture in which the inclination angle of the seat back 12 is increased before the collision, a submarine phenomenon such as sliding on the seat cushion 11 from under the waist belt 46 occurs. Can be prevented.
[0027]
In addition, since the movement of the waist of the occupant is suppressed, the posture of the occupant is stabilized and the leg of the occupant cannot be lifted up unlike the conventional case, so the foot does not come off the pedal. The operation can be performed reliably, and re-collision can be avoided.
[0028]
FIG. 7 is an explanatory view for explaining a comparative example of the seating surface projecting device. The seating surface projecting device 110 has a base portion 112 attached to the sheet tray 111 and is rotatable on the base portion 112 via a support shaft 113. The pipe arm 114 is attached, and the seat 115 of the seat cushion 116 is raised at the front portion 115 of the pipe arm 114.
That is, the seating surface protruding device 110 is configured such that the support shaft 113 that is the rotation center of the pipe arm 114 is arranged behind the front portion 115 that raises the seating surface 117.
[0029]
In this comparative example, when a forward force F acts on the front portion 115 of the pipe arm 114 from the occupant, the force F easily deforms from the bent portion (portion close to the support shaft 113) of the pipe arm 114, and the occupant's waist It is disadvantageous for the restraint.
Further, after the front portion 115 of the pipe arm 114 is flipped up, a special holding member for maintaining the position is required.
[0030]
In contrast to the comparative example, the seating surface projecting device 15 of the present invention shown in FIG. 6 is configured such that the support shaft 24 that is the rotation center of the pipe arm 25 is disposed in front of the rear portion 25a that raises the seating surface 11a. is there.
In the present invention, as shown in FIG. 6, when a forward force F acts on the rear portion 25 a of the pipe arm 25 from the occupant, this force F can be received by the stopper 23 a of the base portion 23, and the pipe arm 25 is deformed. Can be suppressed.
Further, the provision of the stopper 23a eliminates the need for a special holding member for maintaining the position of the pipe arm 25 after the pipe arm 25 is flipped up.
[0031]
In this manner, by arranging the support shaft 24 in front of the rear portion 25a of the pipe arm 25 of the seating surface projecting device 15, the restraint of the occupant's waist is further strengthened by the force acting on the pipe arm 25 from the occupant during a collision. Can be preferred.
[0032]
FIG. 8 is a perspective view showing another embodiment of the seating surface projecting device for a vehicle seat according to the present invention. The seating surface projecting device 60 includes a fixed shaft 62 attached to the seat tray 61 and the fixed shaft 62. Pulleys 63, 63 attached to the pulleys 63, 63, pipe arms 65 attached to the pulleys 63, 63 via brackets 64, 64, wires 66, 66 wound around the pulleys 63, 63, It consists of cylinders 67 and 67 for pulling 66 in. The inflator that supplies combustion gas to the cylinders 67 and 67 and the control unit for igniting the inflator are the same as those described in FIG.
[0033]
When the vehicle collides, a piston (not shown) in the cylinders 67 and 67 is moved by the high-pressure fuel gas supplied into the cylinders 67 and 67, and the pulleys 63 and 63 are rotated by pulling the wires 66 and 66, The pipe arm 65 is swung from the position indicated by the imaginary line to the position indicated by the solid line, and the seating surface 11a of the seat cushion 11 shown in FIG.
[0034]
FIG. 9 is a perspective view showing a modification of another embodiment (example of FIG. 8) of the seating surface projecting device for a vehicle seat according to the present invention, and the seating surface projecting device 69 is the seating shown in FIG. This is a device in which the positions of the cylinders 67 and 67 with respect to the surface protrusion device 60 are changed from the front position of the fixed shaft 62 to the rear position.
[0035]
FIG. 10 is a perspective view showing still another embodiment of the seating surface projecting device for a vehicle seat according to the present invention. The seating surface projecting device 70 is a cylinder provided on each of the side walls 72 and 72 of the seat tray 71. 73, 73 (reference numeral 73 on the back side is not shown), a main wire 74 passed between the pistons (not shown) movably accommodated in the cylinders 73, 73, and a central portion of the main wire 74 It consists of sub-wires 75 and 75 that are respectively passed to the outer side portion and the side walls 72 and 72 of the sheet tray 71, and wire lock portions 76 and 76 attached to the side walls 72 and 72 in the vicinity of the cylinders 73 and 73. Reference numeral 77 denotes a collar that covers the central portion of the main wire 74.
[0036]
Here, the inflator that supplies the combustion gas to the cylinders 73 and 73 and the control unit for igniting the inflator are the same as those described with reference to FIG.
The seating surface protrusion device 70 shown in the figure is in a state before operation, and the main wire 74 and the sub wires 75 and 75 are in a slack state.
[0037]
FIG. 11 is an operational view of still another embodiment (example of FIG. 10) of the seating surface protruding device for a vehicle seat according to the present invention.
In the seating surface protruding device 70, when a vehicle collides, high pressure combustion gas is supplied to the cylinders 73 and 73.
Thereby, each piston in the cylinders 73 and 73 moves at high speed, and the piston stretches the main wire 74 and the sub-wires 75 and 75 accordingly.
As a result, the seating surface 11a of the seat cushion 11 shown in FIG. 3 is raised.
[0038]
12A and 12B are cross-sectional views of the wire lock portion shown in FIG.
(A) shows a state immediately after the main wire 74 is stretched.
The wire lock portion 76 is attached to a case 81 attached to the side wall 72 (see FIG. 11) of the sheet tray 71 (see FIG. 11), a support shaft 82 attached to the case 81, and rotatably attached to the support shaft 82. A roller member 83 around which the main wire 74 is hung, a movable tooth 84 attached to the roller member 83, a fixed tooth 85 fixed to the case 81 in order to bite the main wire 74 in pairs with the movable tooth 84, And a stopper 86 for the movable tooth 84.
[0039]
In (b), after the main wire 74 is stretched, when a force from the occupant acts on the central portion of the main wire 74 and the main wire 74 is pulled inward, the roller member 83 rotates and the movable teeth 84 are The main wire 74 is bitten between the fixed teeth 85. As a result, the main wire 74 is locked, and the main wire 74 can be prevented from sagging.
[0040]
In the present invention, as shown in FIG. 2, the seat surface push-up member 16 is exemplified by a structure that swings the pipe arm 25, but the present invention is not limited thereto, and for example, a rod-like member is linearly moved. The cam-like member may be rotated, or the spherical member may be moved up and down, as long as the seating surface 11a (see FIG. 3) is raised.
[0041]
In the present invention, the driving means 17 is exemplified by a combination of the cylinder 31 and the inflator 34. However, the driving means 17 is not limited to this. For example, the driving means 17 is driven by an electromagnet, or by a high pressure gas supply from a gas tank or an accumulator. But you can.
[0042]
【The invention's effect】
The present invention exhibits the following effects by the above configuration.
According to another aspect of the present invention, a vehicle seat includes a seating surface push-up member for raising the seating surface of the seat cushion corresponding to a position immediately before the seated occupant's pelvis, drive means for raising the seating surface push-up member, A pipe that includes a control unit that controls the operation of the driving means based on a change in vehicle body acceleration at the time of a collision, and a seating surface push-up member that is swingably attached to a base portion provided inside the seat cushion via a support shaft an arm, in this pipe arm, the direction members before and after a pair of left and right extending toward the longitudinal direction of the seat, a front width direction member extending in the left-to-right to connect the front ends of these front-rear direction member, the front-rear direction and a rear width direction member extending in the left-to-right to connect the rear ends of members, the pair of left and right front-rear direction member is a shaped member rather side view, the front width direction member, car Except at the time of a collision, it is arranged at a position higher than the support shaft, and the driving means includes a wire attached to the front width direction member, and the front width direction member is lowered by pulling this wire downward to Runode increase the width direction member, it is possible to suppress the movement of the occupant's waist during a vehicle collision, it is possible to prevent movement of the occupant forward.
[0043]
In addition, since the movement of the waist of the occupant is suppressed, the posture of the occupant is stabilized and the leg of the occupant cannot be lifted up unlike the conventional case, so the foot does not come off the pedal. The operation can be performed reliably and re-collision can be avoided.
[Brief description of the drawings]
FIG. 1 is a perspective view of a vehicle seat according to the present invention. FIG. 2 is a perspective view showing the interior of the seat cushion of the vehicle seat according to the present invention. FIG. 4 is an operational diagram for explaining the operation of the seating surface projecting device for a vehicle seat according to the present invention. FIG. 5 is an explanatory diagram for explaining a seated state of an occupant in the vehicle seat according to the present invention. FIG. 7 is an explanatory view for explaining a comparative example of the seating surface protruding device. FIG. 8 is another embodiment of the seating surface protruding device for the vehicle seat according to the present invention. FIG. 9 is a perspective view showing a modification of another embodiment (example of FIG. 8) of the seating surface projecting device for a vehicle seat according to the present invention. FIG. 10 is a vehicle seat according to the present invention. FIG. 1 is a perspective view showing still another embodiment of the seating surface protrusion device of FIG. FIG. 12 is a sectional view of the wire lock portion shown in FIG. 11; FIG. 13 is a sectional view of the wire lock portion shown in FIG. 11; Explanatory drawing explaining the restraint state of the seat belt [Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Vehicle seat, 11 ... Seat cushion, 11a ... Seating surface of seat cushion, 15, 60, 69, 70 ... Seating surface protrusion apparatus, 16 ... Seating surface pushing-up member, 17 ... Drive means, 18 ... Control part, 23 ... Base part, 24 ... Support shaft, 25 ... Pipe arm, 25a ... Rear width direction member (rear part of pipe arm), 25b ... Front width direction member (front part of pipe arm), 32 ... Wire, 42 ... Pad, 51 ... Pelvis.

Claims (1)

車両衝突時に乗員が慣性力で前方へ移動するのを防止する車両用シートにおいて、
着座した乗員の骨盤の直前位置に対応するシートクッションの着座面を盛り上げるための着座面押し上げ部材と、この着座面押し上げ部材を上昇させるための駆動手段と、この駆動手段の作動を衝突時の車体加速度の変化に基づいて制御する制御部とからなり、
前記着座面押し上げ部材は、前記シートクッションの内部に設けたベース部に支軸を介してスイング自在に取付けたパイプアームを備え、
このパイプアームは、前記シートの前後方向に向けて延びる左右一対の後方向部材と、これらの後方向部材の前端同士を接続する左右に延びる前部幅方向部材と、前記前後方向部材の後端同士を接続する左右に延びる後部幅方向部材とを備え
前記左右一対の前後方向部材は、側面視くの字状の部材であり、前記前部幅方向部材は、車両衝突時以外は前記支軸よりも高い位置に配置され、
前記駆動手段は、前記前部幅方向部材に取付けられたワイヤを備え、このワイヤを下方に引くことにより前記前部幅方向部材を下降させることで前記後部幅方向部材を上昇させることを特徴とする車両用シート。
In the vehicle seat that prevents the occupant from moving forward due to inertial force in the event of a vehicle collision,
A seating surface push-up member for raising the seating surface of the seat cushion corresponding to the position immediately before the pelvis of the seated occupant, drive means for raising the seating surface push-up member, and operation of the drive means on the vehicle body at the time of collision It consists of a control unit that controls based on changes in acceleration,
The seating surface push-up member includes a pipe arm that is swingably attached to a base portion provided inside the seat cushion via a support shaft,
The pipe arm includes a pair of left and right front-rear direction member extending toward the longitudinal direction of the sheet, a front width direction member extending in the left-to-right to connect the front ends of these front-rear direction member, said front-rear direction member and a rear width direction member extending in the left-to-right for connecting the rear end together,
The pair of left and right front-rear members are dog-shaped members when viewed from the side, and the front width direction member is disposed at a position higher than the support shaft except during a vehicle collision,
Said drive means, characterized in Rukoto said with a wire attached to the front width direction member, it raises the rear width direction member by lowering the front width direction member by pulling the wire downwardly Vehicle seat.
JP22466299A 1999-08-06 1999-08-06 Vehicle seat Expired - Fee Related JP4282838B2 (en)

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JP22466299A JP4282838B2 (en) 1999-08-06 1999-08-06 Vehicle seat

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22466299A JP4282838B2 (en) 1999-08-06 1999-08-06 Vehicle seat

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JP2001047918A JP2001047918A (en) 2001-02-20
JP4282838B2 true JP4282838B2 (en) 2009-06-24

Family

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Family Applications (1)

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Cited By (1)

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DE10011817B4 (en) * 1999-03-15 2005-05-25 NHK Spring Co., Ltd., Yokohama Vehicle seat device for lifting a front seat part
JP4081347B2 (en) * 2002-10-28 2008-04-23 株式会社デルタツーリング Seat structure
WO2004113115A1 (en) * 2003-06-24 2004-12-29 Autoliv Development Ab Seat cushion spring-retaining structure and seat cushion device for motor vehicle
GB0315253D0 (en) * 2003-06-30 2003-08-06 Dalphimetal Ltd Vehicle seat with pelvis restraining device
FR2877284B1 (en) * 2004-11-04 2007-03-02 Peugeot Citroen Automobiles Sa ANTI-SUBMARINING DEVICE
JP2009035092A (en) * 2007-08-01 2009-02-19 Autoliv Development Ab Waist restraining device
JP2009119897A (en) * 2007-11-12 2009-06-04 Autoliv Development Ab Waist restraining device
JP5675293B2 (en) * 2010-11-17 2015-02-25 芦森工業株式会社 Vehicle seat equipped with an airbag device
FR3081794B1 (en) * 2018-06-04 2020-07-24 Psa Automobiles Sa VEHICLE SEAT WITH ACTIVE CUSHION NOSE
JP2020055500A (en) * 2018-10-04 2020-04-09 トヨタ自動車株式会社 Vehicular seat structure
JP7364938B2 (en) 2019-12-27 2023-10-19 テイ・エス テック株式会社 vehicle seat

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10829015B2 (en) 2018-10-11 2020-11-10 Ford Global Technologies, Llc Vehicle seat assembly

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