JP4129607B2 - Electric seat - Google Patents

Description

【００６３】
３個のスイッチＳＡ１〜３でなるスイッチ群ＳＡは、シート使用者識別用の開，閉スイッチであり、それらの中の１個ＳＡｉ（ｉ＝１，２又は３）を押すとそれが閉となって他の２つが機械的に開に強制される。すでに閉となっているスイッチを再度押すとそれが開に切換わり、前スイッチ開となる。シートＥＣＵに対しては、スイッチＳＡ１〜３は、シート姿勢データ（前後位置データＲＰＡ，ヘッドレスト上下位置データＲＰＢ，クッション前部上下位置データＲＰＣ，クッション後部上下位置データＲＰＤ，シートバック傾斜データＲＰＥ、および、ランバーサポート回動位置データＲＰＦ、の集合、すなわち位置データ群）を、シートＥＣＵ（のＥＥＰＲＯＭ１７）に登録し、それから読出す場合の、アクセス先のデータテーブルの名宛て又は名指をするものである。
【００６４】
指で押している間のみオンとなるモーメンタリスイッチＳＢは、表１に示すように、各機構Ａ〜Ｆに各１対割り当てられた、総計１２個の手動駆動用の往，復方向駆動指示スイッチであり、例えば１対であるＳＢＡｆとＳＢＡｒの一方ＳＢＡｆは、機構Ａによるシートの前方向への駆動を指示するスイッチ、ＳＢＡｒは後方向への駆動を指示するスイッチであり、指で押されている間オンで、これが駆動を指示する。ＳＢＢｕとＳＢＢｄは、ヘッドレスト２の上駆動指示用および下駆動指示用である。ＳＢＣｕとＳＢＣｄは、シートクッション２の前部の上駆動指示用および下駆動指示用である。ＳＢＤｕとＳＢＤｄは、シートクッション２の後部の上駆動指示用および下駆動指示用である。ＳＢＥｆとＳＢＥｒは、シートバック２の前方向への回動駆動指示用および後方向への回動駆動指示用である。ＳＢＦｆとＳＢＦｒは、ランバーサポートの前方向（着座者に向けて突出す方向）への回動駆動指示用および後方向への回動駆動指示用である。
【００６５】
自動姿勢設定スイッチＳＣは、メモリ（ＥＥＰＲＯＭ１７）に登録しているシート姿勢データ又はＲＯＭ１１の標準姿勢データを読出して、その姿勢にシートを定めることを指示するものである。このスイッチＳＣがオンにされると、そのときＳＡ１〜ＳＡ３のいずれかＳＡｉがオンであると、そのスイッチＳＡｉに宛てられた姿勢データが、ＥＥＰＲＯＭ１７の姿勢データテーブルｉ（メモリの一領域）から読み出される。ＳＡ１〜ＳＡ３すべてがオフであったときには、ＲＯＭ１１の標準姿勢データテーブル（メモリの一領域）に書込まれている標準姿勢データが読出される。
【００６６】
姿勢登録スイッチＳＤは、ＥＥＰＲＯＭ１７にシート姿勢データを登録することを指示するものであり、このスイッチＳＤがオンにされると、そのときＳＡ１〜ＳＡ３のいずれかＳＡｉがオンであると、ＥＥＰＲＯＭ１７上の、そのスイッチＳＡｉに宛てられた姿勢データテーブルｉに、そのときのシート姿勢データ（ＲＰＡ〜ＲＰＦの集合）が書込まれる。ＳＡ１〜ＳＡ３すべてがオフであったときには、この書込みは行なわれない。
【００６７】
ヘッドレスト連動許可スイッチＳＥは、開閉スイッチであり、その閉（オン）は、シートの前後位置ＲＰＡの変更に対応して、該位置ＲＰＡに対応した適位置にヘッドレストの高さを自動調整するヘッドレスト自動調整モ−ドを指定（許可）し、スイッチＳＥの開（オフ）は、ヘッドレスト自動調整モ−ドを解除（禁止）する。
【００６８】
ドア開閉検知スイッチＳＦは、ドライバ席ドアの開閉を検出するものであり、スイッチＳＦの閉（オン）はドア開を、開（オフ）はドア閉を意味する。ドライバシート（シートクッション１）の着座センサＳＧは、ドライバシートに着座者があるか否かを検出し、着座センサＳＧのオン（閉）は着座者ありを、オフ（開）は着座なしを意味する。操作表示パネルには９個の発光ダイオ−ドＬＤが備わっている。その内訳を次の表２に示す。
【００６９】
【表２】

【００７０】
発光ダイオ−ドＬＤ１〜ＬＤ３は、それぞれスイッチＳＡ１〜ＳＡ３がオンのときに点灯するもので、ＥＥＰＲＯＭ１７上の、姿勢データテーブル１〜３のいずれが指定であるかを意味する。発光ダイオ−ドＬＤＡ〜ＬＤＦのそれぞれは機構Ａ〜Ｆのそれぞれに割り当てられており、割り宛てられた機構対応の位置レジスタの位置データが、検出値でないとき、該機構が駆動中のとき、ならびに、過負荷検出と位置レジスタの位置データとが解離している（機構異常が考えられる）ときに点灯される。
【００７１】
図１１の（ａ）に、機構Ａによるシートの前後駆動範囲と前後位置データを横軸に、機構Ｂによるヘッドレストの上下移動範囲と上下位置データを縦軸にして、位置検出スイッチＡ３とＢ３のオン／オフで規定される領域区分を示す。機構ＡのスイッチＡ３と図示しないスイッチ操作カムとの組合せにより、スイッチＡ３は、シート前後位置ＲＰＡが、基準点ＰＡref（１３０ｍｍ）より、移動領域の基点である前限界位置（ＰＡmin＝０ｍｍ）側の間オン、基準点ＰＡrefおよびそれより移動領域の終点である後限界位置（ＰＡmax＝２４０ｍｍ）側の間オフとなる。機構ＢのスイッチＢ３と図示しないスイッチ操作カムとの組合せにより、スイッチＢ３は、ヘッドレスト上下位置ＲＰＢが、基準点ＰＢref（３５ｍｍ）より基点である下限界位置（ＰＢmin＝０ｍｍ）側の間オン、基準点ＰＢrefおよびそれより終点である上限界位置（ＰＢmax＝７２ｍｍ）側の間オフとなる。すなわち、位置検出スイッチＡ３，Ｂ３が切換わる基準点（ＰＡref＝１３０ｍｍ，ＰＢref＝３５ｍｍの点ＩＰｂ）は、各移動領域（ＰＡmin＝０ｍｍ〜ＰＡmax＝２４０ｍｍ，ＰＢmin＝０ｍｍ〜ＰＢmax＝７２ｍｍ；中間点は１２０ｍｍ，３６ｍｍ）の中程（ＰＡref＝１３０ｍｍ，ＰＢref３５ｍｍ）に定められている。
【００７２】
他の機構Ｃ〜Ｆのそれぞれにも１個の、同様な位置検出スイッチ（Ｃ３〜Ｆ３：図示せず）およびスイッチ操作カム（図示せず）があり、上述と同様に、各移動領域の中程の一点ＰＣref，ＰＤref，ＰＥref，ＰＦrefにて、該スイッチのオン／オフが切換わる。
【００７３】
図１１上の太い左下り斜線は、シート前後位置に連動してヘッドレストの上下位置を自動調整する場合の、シート前後位置対応のヘッドレスト目標位置（適位置）を示し、この自動調整モ−ドが指定されているときには、シートの前後移動に伴って、ヘッドレストが該斜線の位置に自動的に駆動される。
【００７４】
図３〜図１０に、図２に示すＣＰＵ１０の制御動作の概要を示す。まず図３を参照されたい。電動シートの電源スイッチＳＰＳが車上バッテリＢＡＴに接続されて該電源スイッチＳＰＳがオン（閉）になると、電源回路ＰＳＣがＣＰＵ１０等の待機監視要素に微小電力を供給し、これによりシートＥＣＵが「待機状態」になる。ＣＰＵ１０は、この電源オン（微小電力の供給）に応答して、その内部のレジスタ，カウンタ，タイマ等を待機時の状態に設定し、入出力ポ−トを待機時の信号レベルに定める（ステップ１）。なお、以下においてカッコ内では、ステップという語を省略してステップＮｏ．数字，記号のみを記す。
【００７５】
この時点では、ＣＰＵ１０は、各機構Ａ〜Ｆの位置データを保持していない。次にＣＰＵ１０は、自己保持リレーＰＲＹをオンにし、タイマＴｗをスタートする（２，３）。リレーＰＲＹのオンにより電源回路ＰＳＣが機構駆動装置Ａｄ〜Ｆｄに動作電圧を与え、シートＥＣＵは「活性状態」になる。これにより、各駆動装置Ａｄ〜Ｆｄのモータコントローラ９ａ，９ｂ，・・・が、自身の電源オン応答の初期化を実行し、そしてＣＰＵ１０からのコマンドを待つ指令待機状態となり、位置検出スイッチＡ３，Ｂ３，・・・の状態を読むことができる。また、ＣＰＵ１０も、Ｉ／Ｏ１６および各モータコントローラ９ａ，９ｂ，・・・を介して、位置検出スイッチＡ３，Ｂ３，・・・の状態を知ることができる。しかしこの時点では、モータコントローラ９ａ，９ｂ，・・・も現在位置データを保持していないので、ＣＰＵ１０およびモータコントローラ９ａ，９ｂ，・・・共に、各機構Ａ〜Ｆの現在位置（Ａ〜Ｆの位置の集合をシート姿勢と称す）を知らない。
【００７６】
ＣＰＵ１０はここで、ＥＥＰＲＯＭ１７から、制御データＥＲＡ〜ＥＲＦおよび機構位置データＥＰＡ〜ＥＰＦを読出す（４）。これらのデータの内容は次の通りである；
ＥＲＡ：前回の電源オフ直前に、機構Ａ（のモータＡ１）が駆動中であったか、
停止中であったかを示す１ビット。駆動中＝「０」／停止中＝「１」，
ＥＲＢ：ＥＲＡと同様で、機構Ｂに関して、駆動中＝「０」／停止中＝「１」，
ＥＲＣ：ＥＲＡと同様で、機構Ｃに関して、駆動中＝「０」／停止中＝「１」，
ＥＲＤ：ＥＲＡと同様で、機構Ｄに関して、駆動中＝「０」／停止中＝「１」，
ＥＲＥ：ＥＲＡと同様で、機構Ｅに関して、駆動中＝「０」／停止中＝「１」，
ＥＲＦ：ＥＲＡと同様で、機構Ｆに関して、駆動中＝「０」／停止中＝「１」，
ＥＰＡ：前回の電源オフまでに、最後に書込まれたシート前後位置データＲＰＡ，
ＥＰＢ：ＥＰＡと同様の、ヘッドレスト上下位置データＲＰＢ，
ＥＰＣ：ＥＰＡと同様の、シートクッション前部の上下位置データＲＰＣ，
ＥＰＤ：ＥＰＡと同様の、シートクッション後部の上下位置データＲＰＤ，
ＥＰＥ：ＥＰＡと同様の、シートバックの傾斜角度データＲＰＥ，
ＥＰＦ：ＥＰＡと同様の、ランバーサポートの突出し位置データＲＰＦ。
【００７７】
なお、ＥＥＰＲＯＭ１７にデータ書込みが行なわれていないとき（ならびにメモリクリアされたとき）は、制御データＥＲＡ〜ＥＲＦはすべて「０」である。１．電源スイッチＳＰＳのオン直後の、シート姿勢初期値の決定（ＩＶＤ Ａ〜Ｆ）
１Ａ．シート前後位置ＲＰＡの初期値の決定（ＩＶＤ Ａ）
ここでＣＰＵ１０は、機構Ａ宛ての制御データＥＲＡをチェックして（５Ａ）、それが「１」であると、ＥＥＰＲＯＭ１７から読出した機構Ａ宛ての位置データＥＰＡが前回の電源オフ時のシート前後位置（これに現在位置が同じ）を正しく表わす可能性が高い（信頼性が高い）ので、ＣＰＵ１０の内部メモリ又はＲＡＭ１２に割り当てた、機構Ａ宛てのシート前後位置レジスタＲＰＡに、ＥＰＡを書込み（６Ａ）、位置レジスタＲＰＡのデータＲＰＡを機構Ａの駆動装置Ａｄのモータコントローラ９ａに転送する（１３Ａ）。モータコントローラ９ａは、受信した位置データＲＰＡを、その内部メモリに割り宛てた位置レジスタに書込む。
【００７８】
しかし制御データＥＲＡが「０」であると、位置データＥＰＡの、現在のシート位置を正しく表わす信頼性が低い、すなわちデータエラーの可能性が高い、と考えられるので、ＣＰＵ１０は、レジスタＦＩＡに「１」（検出値に基づいた位置データの設定は未完）を書込み（７Ａ）、発光ダイオ−ドＬＤＡを点灯し（８Ａ）、機構駆動装置Ａｄ（のモータコントローラ９ａ）に状態情報を要求して、自己に読込む（９Ａ）。ここでは、読込んだ状態情報の中の、位置検出スイッチＡ３の状態信号を摘出して、位置レジスタＲＰＡに、仮のものとして、所定の位置データを書込む。すなわち、位置検出スイッチＡ３がオフ（図１１の（ａ）に示すエリアＡ又はＢ）であるときは、位置レジスタＲＰＡにＰＡmax＝２４０ｍｍを書込む。スイッチＡ３がオン（エリアＢ又はＣ）であるときは、位置レジスタＲＰＡにＰＡref＝１３０ｍｍを書込む（１０Ａ〜１２Ａ）。
【００７９】
１Ｂ．ヘッドレスト上下位置ＲＰＢの初期値の決定（ＩＶＤ Ｂ）
ここでも、上記の処理（ＩＶＤ Ａ）と同様にして、制御データＥＲＢが「１」であると、機構Ｂ宛てのヘッドレスト上下位置レジスタＲＰＢに、ＥＰＢを書込み（６Ｂ）、位置レジスタＲＰＢのデータＲＰＢを機構Ｂの駆動装置Ｂｄのモータコントローラ９ｂに転送する（１３Ｂ）。モータコントローラ９ｂは、受信した位置データＲＰＢを、その内部メモリに割り宛てた位置レジスタに書込む。しかし制御データＥＲＢが「０」であると、レジスタＦＩＢに「１」を書込み（７Ｂ）、発光ダイオ−ドＬＤＢを点灯し（８Ｂ）、機構駆動装置Ｂｄに状態情報を要求して、自己に読込む（９Ｂ）。ここでは、読込んだ状態情報の中の、位置検出スイッチＢ３の状態信号を摘出して、位置レジスタＲＰＢに、仮のものとして、所定の位置データを書込む。すなわち、位置検出スイッチＢ３がオフ（図１１の（ａ）に示すエリアＡ又はＢ）であるときは、位置レジスタＲＰＢにＰＢref＝３５ｍｍを書込み、スイッチＢ３がオン（エリアＣ又はＤ）であるときには位置レジスタＲＰＢにＰＢmin＝０ｍｍを書込む（１０Ｂ〜１２Ｂ）。
【００８０】
他の機構Ｃ〜Ｆのそれぞれ宛ての位置レジスタＲＰＣ〜ＲＰＦに各初期値を設定する、他の初期値の決定ＩＶＤ Ｃ〜Ｆの内容も、上述のＩＶＤ Ａ，Ｂのものと同様である。
２．電源スイッチＳＰＳのオン直後の、ヘッドレストの自動調整（ＨＲＡ）
図４を参照する。ＣＰＵ１０は次に、レジスタＦＩＡ，ＦＩＢのデータをチェックして（１５）、それらの少くとも一方が「１」（検出値に基づいた位置データの設定は未完）であると、シート前後位置データＲＰＡ又はヘッドレスト上下位置データＲＰＢが不正確であるので、ヘッドレストを、着座者保護の信頼性が高い高位置に仮設定する（１６〜１８）。すなわち、シートクッション１に対するシートバック２の傾斜角度データＲＰＥを位置レジスタＲＰＥから読出して、それが基準角度（基準点）ＰＥref以下であるかをチェックする（１６）。角度データＲＰＥが表わす角度値の最低値（ＰＥmin＝０°）は、シートバック２が前方向の限界位置に到れてシートクッション１に対してシートバック２が略６０度の角度（車両の床面に対して６０度）で前に到れた前傾姿勢であり、角度データＲＰＥが表わす角度値の最高値（ＰＥmax＝１２０°）では、シートバック２が車両の床面と平行（水平）である。基準角度（基準点）ＰＥref＝５０°（車両の床面に対しては１１０°）である。
【００８１】
ステップ１６で、シートバック２の位置（傾斜角度）データＲＰＥがＰＥref以下であると、すなわち、シートバック２の、車両床面に対する角度が１１０°以下であると、シートバック２は実質上起立しておりヘッドレスト３の上昇駆動すなわち押出しに問題がない。この場合にはＣＰＵ１０は、位置レジスタＲＰＡのデータ（ここでは、ＰＡref＝１３０ｍｍ又はＰＡmax＝２４０ｍｍ）に対応する、ヘッドレスト目標位置（高さ）ＰＢｓ（ＰＡref＝１３０ｍｍ対応のＰＢref＝３５ｍｍ又はＰＡmax＝２４０ｍｍ対応のＰＢmax＝７２ｍｍ）を算出して（１７）、コントローラ９ｂに、ＰＢｓへのヘッドレスト駆動を指示する（１８）。すなわち、コントローラ９ｂに、ヘッドレスト駆動目標位置としてＰＢｓを与え、目標位置への駆動を指示する。コントローラ９ｂは、目標位置ＰＢｓ（＝ＰＢref又はＰＢmax）と、コントローラ９ｂの内部の位置レジスタＲＰＢのデータＲＰＢ（この時点では、ＲＰＢ＝ＰＢref）とを比較して、ヘッドレスト２の位置ＲＰＢが目標位置ＰＢｓに合致する方向に、電気モータＢ１を駆動する。ＣＰＵ１０は、コントローラ９ｂが、目標位置ＰＢｓへの駆動完了を報知して来るまで、過負荷検出回路６ｂ，パルス処理回路７ｂおよび位置検出回路８ｂの出力信号を監視する。
【００８２】
例えば、電源スイッチＳＰＳが車両バッテリＢＡＴに接続され、かつ電源スイッチＳＰＳがオフからオンに切換わったときに、制御データＥＲＡ，ＥＲＢ共に「０」（位置データＥＰＡ，ＥＰＢ共に、信頼性が低い）であった場合を考える。この場合に、シートの前後位置ＲＰＡが、図１１の（ａ）上のエリアＡ又はＤであったときには、位置データＲＰＡ＝ＰＡmax（２４０ｍｍ）であるので、目標位置ＰＢｓ＝ＰＢmax（７２ｍｍ）と算出される。この場合に、ヘッドレスト３がエリアＡ内（例えば、図１１の（ｂ）に示す点ａ０）であったときには、位置データＲＰＢ＝ＰＢref（３５ｍｍ）であるので、コントローラ９ｂが、ＰＢmax（７２ｍｍ）−ＰＢref（３５ｍｍ）分の駆動が必要であるとして、ヘッドレスト３を上駆動する。ヘッドレスト３の、この駆動前の実際の位置はＰＢref（３５ｍｍ）以上であるので、ＰＢmax（７２ｍｍ）−ＰＢref（３５ｍｍ）分の駆動を完了するまでに、あるいはその分の駆動をしたときに、ヘッドレスト３が上限界位置ＰＢmax（７２ｍｍ）に到達して、過負荷検出回路６ａの出力信号が、過負荷なしを示すレベルから、過負荷ありを示すレベルに切換わる。コントローラ９ｂはこの切換りに応答して電気モータＢ１の駆動を停止する。コントローラ９ｂおよびＣＰＵ１０は、過負荷ありに応答して、それぞれの位置レジスタＲＰＢの位置データを、ＰＢmaxに書替える。そしてＣＰＵ１０は、レジスタＦＩＢをクリアして、発光ダイオ−ドＬＤＢを消灯する。以上により、ヘッドレスト３は、例えば図１１の（ｂ）に示す点ａ０からａ１に移動する。すなわち、電源オン応答の初期位置設定により、エリアＡにあったヘッドレスト３は、該エリアの上限位置ＰＢmaxに設定される。
【００８３】
電源スイッチＳＰＳがオフからオンに切換わったときに、シート位置およびヘッドレスト位置がエリアＤ内（例えば、図１１の（ｂ）に示す点ｄ０）にあって、目標位置ＰＢｓ＝ＰＢmax（７２ｍｍ）と算出した場合には、ヘッドレスト位置データＲＰＢ＝ＰＢmin（０ｍｍ）であるので、コントローラ９ｂが、ＰＢmax（７２ｍｍ）−ＰＢmin（０ｍｍ）分の駆動が必要であるとして、ヘッドレスト３を上駆動する。ヘッドレスト３の、この駆動前の実際の位置はＰＢmin（０ｍｍ）以上であるので、ＰＢmax（７２ｍｍ）−ＰＢmin（０ｍｍ）分の駆動を完了するまでに、まず、位置検出スイッチＢ３がオンからオフに切換わる。そのときヘッドレスト３は、基準点の位置ＲＢrefである。コントローラ９ｂおよびＣＰＵ１０は、この切換りに応答して、それぞれの位置レジスタＲＰＢの位置データを、ＰＢrefに書替える。そしてＣＰＵ１０は、レジスタＦＩＢをクリアして、発光ダイオ−ドＬＤＢを消灯する。ここで、目標位置がＰＢmax（７２ｍｍ）、現在位置ＲＰＢがＰＢref（３５ｍｍ）であるのでコントローラ９ｂはヘッドレスト３の上駆動を継続し、パルス処理回路７ｂが移動同期パルスを出力する度に、コントローラ９ｂおよびＣＰＵ１０は、割込処理により位置データレジスタＲＰＢの位置データＲＰＢを最小単位更新する。すなわちヘッドレストの移動に伴って、位置データＲＰＢを更新する。そして、位置データＲＰＢがＰＢmax（７２ｍｍ）になるか、あるいは過負荷検出回路６ａの出力が過負荷を示すものに切換わったときに、コントローラ９ｂはヘッドレスト３の駆動を停止する。以上により、ヘッドレスト３は、例えば図１１の（ｂ）に示す点ｄ０からｄ１を経て上限位置ＰＢmaxに移動する。すなわち、電源オン応答の初期位置設定により、シート前後位置ＲＰＡに対応する適正位置（太い実線）よりも低い位置であるエリアＤにあったヘッドレスト３は、上限位置ＰＢmaxに設定される。すなわち、追突された場合着座者を保護する可能性が高い位置に自動的に設定される。
【００８４】
電源スイッチＳＰＳがオフからオンに切換わったときに、シートの前後位置ＲＰＡが、図１１の（ａ）上のエリアＢ又はＣであったときには、位置データＲＰＡ＝ＰＡref（１３０ｍｍ）であるので、目標位置ＰＢｓ＝ＰＢref（３５ｍｍ）と算出される。この場合に、ヘッドレスト３がエリアＢ内（例えば、図１１の（ｃ）に示す点ｂ０）であったときには、位置データＲＰＢ＝ＰＢref（３５ｍｍ）であるので、コントローラ９ｂはヘッドレスト３は駆動しない。ヘッドレスト３がエリアＢ内にあるということは、ヘッドレスト３がシートの前後位置ＲＰＤに対応するヘッドレスト適正位置ＰＢｓ以上の位置、すなわち追突された場合着座者を保護する可能性が高い位置であることを意味する。今回電源オンになったときのドライバが、前回電源オフになったときのドライバと同一の可能性が高く、シート位置（ヘッドレスト位置）も、同一でよい可能性が高いので、エリアＢ内にあるときには、ヘッドレストを駆動しないのが望ましい。
【００８５】
シート位置およびヘッドレスト位置がエリアＣ内（例えば、図１１の（ｃ）に示す点ｃ０）にあって、目標位置ＰＢｓ＝ＰＢref（３５ｍｍ）と算出した場合には、ヘッドレスト位置データＲＰＢ＝ＰＢmin（０ｍｍ）であるので、コントローラ９ｂが、ＰＢref（３５ｍｍ）−ＰＢmin（０ｍｍ）分の駆動が必要であるとして、ヘッドレスト３を上駆動する。ヘッドレスト３の、この駆動前の実際の位置はＰＢmin（０ｍｍ）以上であるので、ＰＢref（３５ｍｍ）−ＰＢmin（０ｍｍ）分の駆動を完了するまで又はその分の駆動をしたときに、位置検出スイッチＢ３がオンからオフに切換わる。そのときヘッドレスト３は、基準点の位置ＲＢrefである。コントローラ９ｂおよびＣＰＵ１０は、この切換りに応答して、それぞれの位置レジスタＲＰＢの位置データを、ＰＢrefに書替える。そしてＣＰＵ１０は、レジスタＦＩＢをクリアして、発光ダイオ−ドＬＤＢを消灯する。ここで、目標位置ＰＢｓがＰＢref（３５ｍｍ）、現在位置ＲＰＢ（位置レジスタＲＰＢのデータ）がＰＢref（３５ｍｍ）であるので、コントローラ９ｂはヘッドレスト３の駆動を停止する。以上により、ヘッドレスト３は、例えば図１１の（ｃ）に示す点ｃ０からｃ１に移動する。すなわち、電源オン応答の初期位置設定により、シート前後位置ＲＰＢ対応の適正位置ＲＢｓよりも低いエリアＤにあったヘッドレスト３は、適正位置又はそれより高い基準位置ＰＢrefに設定される。
【００８６】
３．定常時のシート姿勢制御
図４を参照する。各機構Ａ〜Ｆ宛ての各位置レジスタＲＰＡ〜ＲＰＦに上述のように初期値を設定し（ＩＶＤ Ａ〜Ｆ）、ヘッドレストの初期調整（ＨＲＡ）を行なった後は、所定周期でパネルＩ／Ｆ１４および外部Ｉ／Ｆ１５に接続されたスイッチの状態読込み（２４）を繰返し、スイッチＳＢのすべてがオフ、しかも状態変化がなく、タイマＴｗがタイムオ−バすると、自己保持リレーＰＲＹをオフにする（１９〜２２）。これによりシートＥＣＵは「待機状態」となり、機構駆動装置Ａｄ〜Ｆｄが電源オフとなる。
【００８７】
しかしＣＰＵ１０は、位置データＲＰＡ〜ＲＰＦを保持しており、状態読込み（１９）を繰返す。そしてスイッチＳＢの中の１つのスイッチのオン又は状態変化があると、タイマＴｗをスタートして（２３）、自己保持リレーＰＲＹをオンにする（２４）。これによりシートＥＣＵは「活性状態」となる。次にＣＰＵ１０は、その位置レジスタＲＰＡ〜ＲＰＢに保持する各位置データＲＰＡ〜ＲＰＢを、各機構駆動装置Ａｄ〜Ｆｄのモータコントローラに転送し、各モータコントローラ９ａ，９ｂ，・・・は、受信した各位置データＲＰＡ〜ＲＰＢを、コントローラ内部の位置レジスタに書込む。次にレジスタＦＩＡ〜ＦＩＦ（図３のステップ７Ａ，７Ｂ参照）のデータを参照して、それが１であると対応する発光ダイオ−ドＬＤＡ〜ＬＤＦを点灯する。例えば、レジスタＦＩＡのデータが１であると、発光ダイオ−ドＬＤＡを点灯とする。そして、図５を参照すると、最新に実行した「状態読込み」（１９）で読込んだ状態データを参照して、スイッチＳＡ１〜ＳＡ３のいずれがオンかをチェックして（２５，２７，２９）、いずれかＳＡｉがオンであると、それに対応付けられている発光ダイオ−ドＬＤｉを点灯にする（２６，２８，３０，３１）。
【００８８】
３Ａ．シートのスライド前進制御（ＡｆＰ）
図５を参照する。次にＣＰＵ１０は、シート前進指示スイッチＳＢＡｆがオンかをチエックして（３２）、オンであると、スライド前進制御（ＡｆＰ）を実行する。このスライド前進制御（ＡｆＰ）では、ＥＥＰＲＯＭ１７の制御データＥＲＡを「０」（モータ駆動中）に書替え（３６）、シートを前方向に駆動し（３９）、シートの前駆動に伴って（移動同期パルスが発生する毎に）、ＣＰＵ１０およびモータコントローラ９ａの、それぞれのシート前後位置レジスタＲＰＡの位置データＲＰＡを更新する（図６の４８）。このシート駆動中に、位置検出スイッチＡ３がオフからオンに切換わると、ＣＰＵ１０およびモータコントローラ９ａは、それぞれの位置レジスタＲＰＡの位置データを、ＰＡrefに書替え（４０，４１）、レジスタＦＩＡの、位置データの正確な設定が未完であることを示す「１」をクリアし（４２）、該未完を示す発光ダイオ−ドＬＤＡを消灯にする（４３）。
【００８９】
なお、移動同期パルスの発生に応答した位置データＲＰＡの更新（４８）によって、位置検出スイッチＡ３がオフ（エリアＡ）からオン（エリアＢ）に切換わる前に、位置レジスタＲＰＡの位置データＲＰＡが、移動同期パルスの発生に応答した位置データＲＰＡのデクレメントにより、エリアＡ内の位置を示すものからエリアＢ内の位置を示すものに切換わる可能性がある。すなわち位置検出スイッチＡ３による領域検出と移動同期パルスのアップ／ダウンカウントによる位置データとが不整合となることが考えられる。したがって、本実施例では、図６を参照すると、位置検出スイッチＡ３がオフ（エリアＡ）の間は、移動同期パルスのダウンカウントにより位置データＲＰＡがエリアＢ内の位置を示すものになるときには、位置データＲＰＡは、エリアＡの限界値（ＲＰref＝１３０ｍｍ）に留め（４８ａ〜４８ｃ−４８ｆ−４８ｇ）、デクレメント（カウントダウン；位置データの更新）は保留する（４８ｆ，４８ｇ）。また、シート位置が下限位置（基点；ＰＡmin＝０）に達していない（過負荷を検知しない）のに位置データＲＰＡが下限位置を越える値（負値）になるときには、位置データＲＰＡを下限位置（ＰＡmin＝０）に留める（４８ｄ，４８ｅ）。これはスライド後退制御（ＡｒＰ）のときも同様であり、スライド後退駆動中に位置検出スイッチＡ３がオン（エリアＢ）の間は、移動同期パルスのアップカウントにより位置データＲＰＡがエリアＡ内の位置を示すものになるときには、位置データＲＰＡは、エリアＢの限界値（ＲＰref−１）に留め、インクレメント（カウントアップ）は保留する。また、シート位置が上限位置（終点；ＰＡmax）に達していない（過負荷を検知しない）のに位置データＲＰＡが上限位置を越える値（ＰＡmax＋１）になるときには、位置データＲＰＡを上限位置（ＰＡmax）に留める。
【００９０】
再度図５を参照する。電気モータＡ１が過負荷（抵抗器ｒａに流れるモータ電流値が設定値以上）になると、シートの前方向駆動を停止し、位置レジスタＲＰＡのデータを基点値ＰＡmin（＝０）に更新して、レジスタＦＩＡをクリアして発光ダイオ−ドＬＤＡを消灯する（３３，３４，３５−４４）。また、シート前進指示スイッチＳＢＡｆがオンからオフに戻ったときにも、シートの前方向駆動を停止する（３２−４４）。モータ駆動を停止すると、モータ駆動中にデータが更新された位置レジスタＲＰＡのデータＲＰＡを、ＥＥＰＲＯＭ１７のレジスタＥＰＡに書込み（４５）、レジスタＦＩＡのデータが「０」（データＲＰＡが検出値に基づいた値であることを意味する）であると、ＥＥＰＲＯＭ１７に制御データＥＲＡ＝「１」（モータ停止中：レジスタＥＰＡのデータＥＰＡが正確な値であることを意味する）を書込む（４７）。
【００９１】
仮に、モータＡ１の駆動中（ステップ３６でＥＲＡ＝０）に電源スイッチＳＰＳが開いたとすると、これによってシートＥＣＵが「電源オフ状態」となり、モータＡ１が電源オフによって停止しても、ＣＰＵ１０はステップ３４，３５ならびに４４〜４７を実行しない。これによりＥＥＰＲＯＭ１７の制御データＥＲＡは「０」に留まり、位置データＥＰＡは、モータＡ１の駆動直前のシート位置を表わすものに留まり、今回のモータ駆動による位置変化を反映しないもの、となる。次に電源オンになったときには、図３のステップ７Ａ〜１２Ａが実行される。
【００９２】
モータＡ１の停止中（ステップ４７でＥＲＡ＝１）に電源スイッチＳＰＳが開いた場合は、次に電源オンになったときには、図３のステップ６Ａが実行され、位置データＥＰＡ（ステップ４５で書込んだＲＰＡ）が、シート位置データＲＰＡに設定され、これは現在のシート位置を正しく表わす。
【００９３】
なお、シート前進駆動を開始するときには、それからの駆動量と経過時間を監視するために、そのときの位置レジスタＲＰＡの位置データＲＰＡをレジスタＰＲＰＡにセ−ブし（３７）、タイマＴｈをスタートする（３８）。ＣＰＵ１０は、これらの駆動量，経過時間を、次に説明するヘッドレストの自動調整に関連する制御で参照する。
【００９４】
３Ｂ．ヘッドレストの自動調整
シートを前後方向に駆動している間、ＣＰＵ１０は、シートの前後移動に連動したヘッドレスト自動調整を実施すべき条件が整っているかをチェックする。条件は、
１）シート前後位置データＲＰＡおよびヘッドレスト上下位置データＲＰＢが、正確である（ＦＩＡ＝０＆ＦＩＢ＝０）、
２）ヘッドレスト自動調整モ−ド指示スイッチＳＥがオン（許可），シートバック２の傾斜角度ＲＰＥが基準値ＰＲref以下，シートクッション１に着座者あり（ＳＧオン）、および（ＡＮＤ：論理積）、「活性状態」になってから、ここまでに、ヘッドレスト上下駆動指示スイッチＳＢＢｕ，ＳＢＢｄがオンになったことがない（ＦＥＢ＝０）、
３）ヘッドレスト自動調整モ−ド指示スイッチＳＥがオン（許可），シートバック２の傾斜角度ＲＰＥが基準値ＰＲref以下，シートクッション１に着座者あり（ＳＧオン）、および（ＡＮＤ：論理積）、シート前後駆動量が設定値ΔＰＡｐ以上となった、
４）ヘッドレスト自動調整モ−ド指示スイッチＳＥがオン（許可），シートバック２の傾斜角度ＲＰＥが基準値ＰＲref以下，シートクッション１に着座者あり（ＳＧオン）、および（ＡＮＤ：論理積）、シート前後駆動開始から時間Ｔｈが経過した、又は、
５）ヘッドレスト自動調整モ−ド指示スイッチＳＥがオン（許可），シートバック２の傾斜角度ＲＰＥが基準値ＰＲref以下，シートクッション１に着座者あり（ＳＧオン）、および（ＡＮＤ：論理積）、シート姿勢をＲＡＭ１１に登録してからシート前後駆動があり、その駆動量が設定値ΔＰＡｐ以上となった又はシート前後駆動開始から時間Ｔｈが経過した、
の第一者１）が成立し、かつ、残り四者２）〜５）のいずれか一者が成立することである。
【００９５】
上記１）の成否は図６のステップ４９および図９のステップＨＣＯでチェックする。上記２）〜５）の各条件の成否を判定するためのレジスタＦＨＢをＣＰＵ１０は有し、ＣＰＵ１０は、「活性状態」（自己保持リレーＰＲＹをオン）にしたときにレジスタＦＨＢをクリアする。レジスタＦＨＢのデータ「０」は、ヘッドレスト自動調整可（許可）を意味し、データ「１」は不可（禁止）を意味する。ヘッドレスト上下駆動指示スイッチＳＢＢｕ又はＳＢＢｄのオンに応答してヘッドレストを駆動したときにＣＰＵ１０は、レジスタＦＨＢに「１」（禁止）を書込む（図８の７９）。また、ＥＥＰＲＯＭ１７に登録した姿勢にシート姿勢を自動設定することが指示されたときにもＣＰＵ１０は、レジスタＦＨＢに「１」（禁止）を書込む（図９の８７−８８）。このＦＨＢ＝「１」（禁止）は、ステップ３７，３８が実行された後、ステップ５２又は５４が成立（ＹＥＳ）したときにクリアされる。すなわちＦＨＢ＝「０」（許可）に書替えられる。
【００９６】
ここで図６と図７を参照する。上記２）の条件の成否をＣＰＵ１０は、図６のステップ５０，５１およびステップ５５，５６でチェックして、上記２）の条件が成立（ヘッドレスト自動調整：許可）のときには、ステップ５０−５１−５５−５６と経て、ステップ５７に進む。また、上記３）の条件の成否をＣＰＵ１０は、ステップ５０，５１，５２，５５，５６でチェックして、成立しているときには、ステップ５０−５１−５２−５３−５５−５６と経て、ステップ５７に進む。更に、上記４）の条件の成否をＣＰＵ１０は、ステップ５０，５１，５２，５４，５５，５６でチェックして、成立しているときには、ステップ５０−５１−５２−５４−５３−５５−５６と経て、ステップ５７に進む。上記５）の条件の成否をＣＰＵ１０は、ステップ８８（図９），３７，３８，５０，５１，５２，５４，５５，５６でチェックして、成立しているときには、ステップ５０−５１−５２−５４−５３−５５−５６と経て、ステップ５７に進む。
【００９７】
ステップ５７でＣＰＵ１０は、そのときのシート前後位置ＲＰＡ（位置レジスタＲＰＡのデータ）に割り付けられたヘッドレスト標準位置ＰＢｓ（図１１上の太い左下りの斜線）を、
ＰＢｓ＝０．５３×ＲＰＡ−３３．９ （ｍｍ）
と算出する。ここで、ＰＢｓ，ＲＰＡ共に、単位はｍｍである。そして、この標準位置ＰＢｓに、ユ−ザ個別のヘッドレスト上下調整値ＰＢａを加えた値をヘッドレスト目標位置ＰＢｏとして算出し、ＰＢｏ＜０ｍｍのときには、ＰＢｏ＝０ｍｍと更新し、ＰＢｏ＞７２ｍｍのときには、ＰＢｏ＝７２ｍｍと更新して（５９〜６２）、駆動装置Ｂｄのモータコントローラ９ｂに与えて、該目標位置ＰＢｏへのヘッドレストの駆動を指示する（６３）。なお、ユ−ザ個別の調整値ＰＢａとは、各スイッチＳＡ１〜３宛ての、ＥＥＰＲＯＭ１７上の各姿勢データテーブル１〜３に登録されている個別調整量であり、スイッチＳＡ１〜３の内、現在オンのスイッチＳＡｉに対応する姿勢データテーブルｉから読出す値である。全スイッチＳＡ１〜３がオフのときには、調整値ＰＢａは０とする（６０）。
【００９８】
次に、スイッチＳＢＡｆがオン（他のスイッチはオフ）であるのでＣＰＵ１０は、他の制御ＡｒＰ，ＢｕＰ，ＢｄＰ，・・・ＦｒＰを素通りし、図９および図１０のステップ８１〜９８又は８１〜１０６を素通りして、図４の「状態読込み」（１９）に進み、そこでスイッチＳＢＡｆオンが継続していると、ステップ２０から２３〜３１を経て、またスライド前進制御（ＡｆＰ）に進む。このようにして、スイッチＳＢＡｆオンが継続している間は、実質上スライド前進制御（ＡｆＰ）のみを、ＣＰＵ１０が実行する。スイッチＳＢＡｆがオンからオフに戻ると、シートの前方向への駆動を停止する（４４）。
【００９９】
３Ｃ．スライド後退制御（ＡｒＰ）
「状態読込み」（１９）のときにシートの後方向への駆動を指示するスイッチＳＢＡｒがオンであると、ＣＰＵ１０は、「スライド後退制御」（ＡｒＰ）で、シートを後方向に駆動する。この制御の内容は、駆動方向は逆ではあるが、前述の「スライド前進制御」（ＡｆＰ）の内容と同様である。
【０１００】
３Ｄ．ヘッドレスト上駆動制御（ＢｕＰ）
「状態読込み」（１９）のときにヘッドレスト上駆動指示スイッチＳＢＢｕがオンであると、ＣＰＵ１０は、図７および図８に示す、ヘッドレスト上駆動制御（ＢｕＰ）を実行する。このヘッドレスト上駆動制御（ＢｕＰ）では、ＥＥＰＲＯＭ１７に制御データＥＲＢ＝０を書込んで（６８）、ヘッドレスト３を上方向に駆動し（６９）、ヘッドレストの上昇に伴って（移動同期パルスが発生する毎に）、ＣＰＵ１０およびモータコントローラ９ｂは、それぞれのヘッドレスト上下位置レジスタＲＰＢの位置データＲＰＢを更新する（７４）。この位置データの更新処理の内容は、前述のスライド前進，後退制御（ＡｆＰ，ＡｒＰ）の場合と同様である。
【０１０１】
このヘッドレスト駆動中に、位置検出スイッチＢ３がオンからオフに切換わると、ＣＰＵ１０およびモータコントローラ９ａは、それぞれの位置レジスタＲＰＢの位置データＲＰＢを、ＰＢrefに書替える（７０，７１）。そしてＣＰＵ１０は、レジスタＦＩＢをクリアし、発光ダイオ−ドＬＤＢを消灯する（７２，７３）。電気モータＢ１が過負荷（抵抗器ｒｂに流れるモータ電流値が設定値以上）になると、ヘッドレストの上駆動を停止し、位置データＲＰＢを上限位置ＰＢmaxに書替え、レジスタＦＩＢをクリアして発光ダイオ−ドＬＤＢを消灯し、位置レジスタＲＰＢのデータＲＰＢをＥＥＰＲＯＭ１７のレジスタＥＰＢに書込む（６５〜６７−７５，７６）。レジスタＦＩＢのデータが「０」（データＲＰＢが検出値に基づいた値であることを意味する）であると、ＥＥＰＲＯＭ１７に制御データＥＲＢ＝「１」（モータ停止中：レジスタＥＰＢのデータＥＰＢが正確な値であることを意味する）を書込む（７８）。また、ヘッドレスト上駆動指示スイッチＳＢＢｕがオンからオフに戻ったときにも、ヘッドレストの上駆動を停止する（６４−７５）。
【０１０２】
なお、ヘッドレスト上駆動指示スイッチＳＢＢｕがオンからオフに戻った（ヘッドレストの上駆動を停止した）ときに、ヘッドレストの駆動（手動調整）があったこと（これによりしばらくは、ヘッドレスト自動調整は禁止する）を示す「１」を、レジスタＦＨＢに書込む（７９）。この「１」は、その後図６に示すステップ３７，３８が実行され、ステップ５２又は５４の条件が成立（ＹＥＳ）したときに消去（ヘッドレスト自動調整の許可を示す０に更新）される。
【０１０３】
３Ｅ．ヘッドレスト下駆動制御（ＢｄＰ）
「状態読込み」（１９）のときにヘッドレストの下駆動を指示するスイッチＳＢＢｄがオンであると、ＣＰＵ１０は、ヘッドレスト下駆動制御（ＢｄＰ）で、ヘッドレストを下方向に駆動する。この制御の内容は、駆動方向は逆ではあるが、前述の「ヘッドレスト上駆動制御」（ＢｕＰ）の内容と同様である。
【０１０４】
３Ｆ．シートベ−ス前部の上駆動制御（ＣｕＰ）
シートベ−スは、シートクッション１と一体のクッション支持フレ−ムであり、シートクッション１の駆動制御に関しては、シートクッションと同体物である。「状態読込み」（１９）のときにシートクッション１の前部の上駆動を指示するスイッチＳＢＣｕがオンであると、ＣＰＵ１０は、シートベ−ス前部上駆動制御（ＣｕＰ）で、シートクッション１の前部を上駆動する。この制御の内容は、前述の「ヘッドレスト上駆動制御」（ＢｕＰ）の内容と同様である。ただし、ステップ７９の処理に相当する処理はない。
【０１０５】
３Ｇ．シートベ−ス前部の下駆動制御（ＣｄＰ）
「状態読込み」（１９）のときにシートクッション１の前部の下駆動を指示するスイッチＳＢＣｄがオンであると、ＣＰＵ１０は、シートベ−ス前部下駆動制御（ＣｄＰ）で、シートクッション１の前部を下駆動する。この制御の内容は、「シートベ−ス前部の上駆動制御」（ＣｕＰ）の内容と同様であるが、駆動方向は逆である。
【０１０６】
３Ｈ．シートベ−ス後部の上駆動制御（ＤｕＰ）
「状態読込み」（１９）のときにシートクッション１の後部の上駆動を指示するスイッチＳＢＤｕがオンであると、ＣＰＵ１０は、シートベ−ス後部上駆動制御（ＤｕＰ）で、シートクッション１の後部を上駆動する。この制御の内容は、前述の「ヘッドレスト上駆動制御」（ＢｕＰ）の内容と同様である。ただし、ステップ７９の処理に相当する処理はない。
【０１０７】
３Ｉ．シートベ−ス後部の下駆動制御（ＤｄＰ）
「状態読込み」（１９）のときにシートクッション１の後部の下駆動を指示するスイッチＳＢＤｄがオンであると、ＣＰＵ１０は、シートベ−ス後部下駆動制御（ＤｄＰ）で、シートクッション１の後部を下駆動する。この制御の内容は、「シートベ−ス後部の上駆動制御」（ＤｕＰ）の内容と同様であるが、駆動方向は逆である。
【０１０８】
３Ｊ．シートバックの前向き回動駆動制御（ＥｆＰ）
「状態読込み」（１９）のときにシートバック２の前方向への回動を指示するスイッチＳＢＥｆがオンであると、ＣＰＵ１０は、シートバック前向き回動駆動制御（ＥｆＰ）で、シートバック２を前傾斜方向に回動駆動する。この制御の内容は、前述の「ヘッドレスト下駆動制御」（ＢｄＰ）の内容と同様である。ただし、ステップ７９の処理に相当する処理はない。
【０１０９】
３Ｋ．シートバックの後向き回動駆動制御（ＥｒＰ）
「状態読込み」（１９）のときにシートバック２の後方向への回動を指示するスイッチＳＢＥｒがオンであると、ＣＰＵ１０は、シートバック後向き回動駆動制御（ＥｒＰ）で、シートバック２を後傾斜方向に回動駆動する。この制御の内容は、「シートベ−ス後部の上駆動制御」（ＤｕＰ）の内容と同様である。ただし、ステップ７９の処理に相当する処理はない。
【０１１０】
３Ｌ．ランバーサポートの突出し回動駆動制御（ＦｆＰ）
「状態読込み」（１９）のときにシートバック２に装備したランバーサポートを、着座者側に突出し回動駆動することを指示するスイッチＳＢＦｆがオンであると、ＣＰＵ１０は、ランバ−突出し駆動制御（ＦｆＰ）で、ランバーサポートを突出し方向に回動駆動する。この制御の内容は、前述の「ヘッドレスト下駆動制御」（ＢｄＰ）の内容と同様である。ただし、ステップ７９の処理に相当する処理はない。
【０１１１】
３Ｍ．ランバーサポートの退避回動駆動制御（ＦｒＰ）
「状態読込み」（１９）のときにランバーサポートを、着座者から退避する方向に回動駆動することを指示するスイッチＳＢＦｒがオンであると、ＣＰＵ１０は、ランバ−退避駆動制御（ＦｒＰ）で、ランバーサポートを退避方向に回動駆動する。この制御の内容は、前述の「ヘッドレスト上駆動制御」（ＢｕＰ）の内容と同様である。ただし、ステップ７９の処理に相当する処理はない。
【０１１２】
３Ｎ．シート姿勢の登録
「状態読込み」（１９）のときに、シート姿勢の登録を指示するスイッチＳＤがオンであると、ＣＰＵ１０は、図９を参照すると、ユ−ザ指定用のスイッチＳＡ１〜３のいずれかＳＡｉがオンであるかをチェックし（８１，８２）、全スイッチＳＡ１〜３がオフのときには、シート姿勢の登録をしない。スイッチＳＡｉ（ｉ＝１，２又は３）がオンであると、各位置レジスタＲＰＡ〜ＲＰＦの各位置データＲＰＡ〜ＲＰＦを、ＥＥＰＲＯＭ１７上の姿勢データテーブルｉの各登録位置レジスタＭＲＰＡｉ〜ＭＲＰＦｉに書込み（８３）、そのときのシート前後位置データＲＰＡ対応の適正ヘッドレスト位置ＰＢｓを算出し（８４）、ユ−ザｉ（スイッチＳＡｉ）個別のヘッドレスト調整値ＰＢａ＝ＲＰＢ−ＰＢｓを算出して、この個別調整値ＰＢａを、姿勢データテーブルｉの、個別調整値レジスタＭＰＢａｉに書込み、スイッチＳＡｉ（ユ−ザｉ）宛てのシート姿勢データの登録があることを示す「１」を、該スイッチＳＡｉ宛てのレジスタＦＳＤｉに書込む（８６）。なお、この個別調整値ＰＢａは、図７のステップ６２で、スイッチＳＡｉ（ユ−ザｉ）宛てのシート姿勢に利用される。
【０１１３】
３Ｏ．自動姿勢設定
「状態読込み」（１９）のときに、自動姿勢設定を指示するスイッチＳＣがオンであると、ＣＰＵ１０は、図９を参照すると、まずレジスタＦＨＢに、ヘッドレストの自動調整の禁止を指定する「１」を書込む（８７，８８）。なお、この「１」は、シートＥＣＵが「待機状態」から「活性状態」に変わったとき、ならびに、図６のステップ５３で消去される。次にＣＰＵ１０は、ユ−ザ指定用のスイッチＳＡ１〜３のいずれかＳＡｉがオンであるかをチェックし（８９）、全スイッチＳＡ１〜３がオフのときには、ＲＯＭ１１の標準シート姿勢データテーブル０の、各標準位置レジスタＭＲＰＡ０〜ＭＲＰＦ０の各位置データを読出して、各機構Ａ〜Ｆの目標位置データとし、各機構駆動装置Ａｄ〜Ｆｄのモータコントローラに与え、その位置への駆動を指示する（９１）。これにより、全スイッチＳＡ１〜３をオフにして自動姿勢設定を指示したときには、ＲＯＭ１１に格納している標準シート姿勢が自動的に設定される。
【０１１４】
いずれかのスイッチＳＡｉ（ｉ＝１，２又は３）がオンであったときには、レジスタＦＳＤｉのデータをチェックして、それが「１」（シート姿勢の登録あり）であると、ＥＥＰＲＯＭ１７のシート姿勢データテーブルｉの、各位置レジスタＭＲＰＡｉ〜ＭＲＰＦｉの各位置データを読出して、各機構Ａ〜Ｆの目標位置データとし、各機構駆動装置Ａｄ〜Ｆｄのモータコントローラに与え、その位置への駆動を指示する（９０）。これにより、スイッチＳＡ１〜３のいずれかＳＡｉをオンにして自動姿勢設定を指示したときには、ＥＥＰＲＯＭ１７に格納しているシート姿勢が自動的に設定される。レジスタＦＳＤｉのデータをチェックしたとき、それが「０」（シート姿勢の登録なし）であったときには、ＥＥＰＲＯＭ１７よりのデータ読出しを行なわず、シート姿勢の自動設定は行なわない。すなわちスイッチＳＣのオン（自動姿勢設定の指示）を無視する。
【０１１５】
３Ｐ．ヘッドレスト自動調整禁止の解除
図９のステップＨＣＯで、レジスタＦＩＡおよびＦＩＢのデータが共に０（位置データＲＰＡ，ＲＰＢが共に正しく現在位置を示す）であるかをチェックして、そうであると、以下の、ヘッドレスト自動調整禁止の解除および自動調整の実行に進む。
【０１１６】
まず図１０を参照する。ＣＰＵ１０は、ドライバ席ドアスイッチＳＦのオン，オフを監視して（９２〜９５）、それが、ドライバ席ドアの閉から開への変化に対応する変化を示したときに、ドライバ（着座者）が変わりシート姿勢が変更される可能性があるので、レジスタＦＨＢをクリアする（９６）。すなわち、レジスタＦＨＢのデータを、ヘッドレスト自動調整可（許可）を意味する０とする。
【０１１７】
３Ｑ．自動調整可否指示スイッチＳＥのオフ（否）からオン（可）への
切換り応答のヘッドレスト自動調整
ＣＰＵ１０は、ヘッドレスト自動調整許可／禁止を指定するスイッチＳＥの、オフ（禁止指示）からオン（許可指示）への切換わりを監視して（９７〜９０）、この切換わりがあったときに、ステップ９０から図７のステップ５７に進んで、ステップ５７〜６３の、シート前後位置ＲＰＡに対応付けられた適正位置ＰＢｏへのヘッドレスト駆動を行なう。
【０１１８】
３Ｒ．シートバック２が、基準角度ＰＦref以下の角度に立上ったときの
ヘッドレスト自動調整
ヘッドレスト自動調整許可／禁止を指定するスイッチＳＥがオン（自動調整許可指定）であるときでも、シートバック２が、基準角度ＰＦrefを越える角度（例えばシートバック２が床面に平行）である間は、図７のステップ５５でこれを認知してＣＰＵ１０は、ヘッドレスト自動調整を実行しない。基準角度ＰＦref以下では、ヘッドレストの移動に障害がないので、ＣＰＵ１０は、図１０のステップ１０１〜１０４で、シートバック２が基準角度ＰＦref以下に立上ったかをチェックして、この立上りがあると、ステップ１０４から図７のステップ５７に進んで、ステップ５７〜６３の、シート前後位置ＲＰＡに対応付けられた適正位置ＰＢｏへのヘッドレスト駆動を行なう。
【０１１９】
３Ｓ．着座者なしからありに切換わったときのヘッドレスト自動調整
ヘッドレスト自動調整許可／禁止を指定するスイッチＳＥがオン（自動調整許可指定）であるときでも、着座者がない（着座者センサＳＧがオフ）ときには、図７のステップ５８でこれを認知してＣＰＵ１０は、ヘッドレスト自動調整を実行しない。そこでＣＰＵ１０は、図１０のステップ１０５〜１０８で、着座者なし（ＳＧがオフ）から着座者あり（ＳＧがオン）に切換わったかをチェックして、この切換りがあると、ステップ１０８から図７のステップ５７に進んで、ステップ５７〜６３の、シート前後位置ＲＰＡに対応付けられた適正位置ＰＢｏへのヘッドレスト駆動を行なう。
【０１２０】
３Ｔ．位置データＲＰＡ，ＲＰＢが共に検出値に従った正確な値に定まったときの
ヘッドレスト自動調整
レジスタＦＩＡ，ＦＩＢのデータの少くとも一方が１（ＲＰＡあるいはＲＰＢが不正確）であるとヘッドレスト自動調整を保留しているが、レジスタＦＩＡ，ＦＩＢのデータが共に０（ＲＰＡおよびＲＰＢ共に正確）に切換わるとＣＰＵ１０は、これをステップ１０９で認知して、図７のステップ５７に進んで、ステップ５７〜６３の、シート前後位置ＲＰＡに対応付けられた適正位置ＰＢｏへのヘッドレスト駆動を行なう。
【図面の簡単な説明】
【図１】 本発明の一実施例の機構概要を示す斜視図である。
【図２】 図１に示す機構Ａ〜Ｅに結合されたシートＥＣＵの構成を示すブロック図である。
【図３】 図２に示すＣＰＵ１０の制御機能の概要の一部分を示すフローチャートである。
【図４】 図２に示すＣＰＵ１０の制御機能の概要の他の部分を示すフローチャートである。
【図５】 図２に示すＣＰＵ１０の制御機能の概要の他の部分を示すフローチャートである。
【図６】 図２に示すＣＰＵ１０の制御機能の概要の他の部分を示すフローチャートである。
【図７】 図２に示すＣＰＵ１０の制御機能の概要の他の部分を示すフローチャートである。
【図８】 図２に示すＣＰＵ１０の制御機能の概要の他の部分を示すフローチャートである。
【図９】 図２に示すＣＰＵ１０の制御機能の概要の他の部分を示すフローチャートである。
【図１０】 図２に示すＣＰＵ１０の制御機能の概要の残部を示すフローチャートである。
【図１１】 図１に示すシートの前後位置を横軸に、ヘッドレストの高さを縦軸にして示す、シート位置およびヘッドレスト高さの領域区分、ならびに、領域対応の位置検出スイッチＡ３，Ｂ３のオン／オフを示すグラフであり、左下りの太い実線は、シート位置に対応する適正なヘッドレスト高さを示す。
【符号の説明】
１：シートクッション
２：シートバック
３：ヘッドレスト
Ａ〜Ｆ：電動駆動機構
Ａ１，Ｂ１：電気モータ
Ａ２，Ｂ２：ロータリエンコーダ
Ａ３，Ｂ３：位置検出スイッチ
Ａｄ〜Ｆｄ：機構駆動装置
ｒａ，ｒｂ：抵抗器
ＳＰＳ：電動シート用電源スイッチ
ＢＡＴ：車両バッテリ
ＳＡ：ユ−ザ宛てスイッチ群
ＳＢ：手動指示スイッチ群
ＳＣ：自動姿勢設定指示スイッチ
ＳＤ：姿勢登録指示スイッチ
ＳＥ：ヘッドレスト自動調整指示スイッチ
ＳＦ：ドライバ席ドアスイッチ
ＳＧ：着座者センサ
ＬＤ：発光ダイオ−ド群[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to an electric seat that drives a seated person or a member that supports a part thereof with an electric mechanism, and in particular, but not intended to be limited thereto, an electric drive mechanism that drives a seat in the front-rear direction as viewed from the seated person. The present invention relates to an electric seat that is mounted on a vehicle, including an electric drive mechanism B that drives A and the headrest in the vertical direction.
[0002]
[Prior art]
  For example, this type of electric seat is used for a driver seat on a vehicle and a seat adjacent thereto (front seat). A position detector is coupled to the drive mechanism, and the seat front-rear position set by the seated person is stored in the memory. Once stored in the memory, the storage position is reproduced simply by pressing the automatic setting instruction key. The position detector is composed of, for example, a limit switch that detects a movement limit point of the mechanism and a rotary encoder connected to the mechanism. When the CPU that is the main body of the seat posture controller detects the limit position by the limit switch, The position data is updated to the data assigned to the limit position. For example, when the lower limit position is detected, the position data is initialized to data indicating 0, and when the upper limit position is detected, the position data is updated to indicate the upper limit position Pmax. During mechanism drive in the direction from the lower limit position toward the upper limit position, the CPU counts up the movement synchronization pulse generated by the rotary encoder, and counts down during mechanism drive in the reverse direction to update the position data. In the normal case, an overload detector for detecting an overcurrent of the drive motor is provided, and when it detects an overcurrent, the mechanism drive is regarded as a mechanism trouble or a limit position has been reached, and the mechanism drive is stopped. Using this, position detection that recognizes the arrival of the lower limit position and the upper limit position of the mechanism is also known.
[0003]
  When the position setting (automatic posture setting) is instructed to the storage position, the CPU uses the storage position of the memory as the target position, compares the held position data (current position) with the target position, and drives the mechanism driving direction (electric The rotation direction of the motor is determined and the mechanism is driven. When the position data reaches the target position, the mechanism drive is stopped.
[0004]
  In the position grasping in which the position data is updated by counting up / down the movement synchronization pulse, if the position data is lost due to the power off, the position data does not exist when the power is turned back on. That is, the sheet position is unknown. Therefore, immediately after the power is turned on, when the seat is driven in the direction toward the lower limit position (or upper limit position) and reaches the lower limit position (upper limit position), the position data is initialized to indicate the lower limit position (upper limit position). Thus, the position data is correctly determined. Since this operation takes time, a nonvolatile memory is provided in the seat attitude controller, and the position data is written to the memory and stored even when the power is turned off. It is also used as a representation of position.
[0005]
[Problems to be solved by the invention]
  By the way, even when using a non-volatile memory, the position data stored in the non-volatile memory according to the relative relationship of the timing of updating the position data, writing the update of the position data to the non-volatile memory, and turning off the power. Is inaccurate. For example, when the sheet driving is started, the position data at the end of the sheet driving is written in the nonvolatile memory. When the power is turned off during the sheet driving, the memory position data is immediately before starting the sheet driving. Stay in things. To avoid this, even if the position data is written to the memory every time the position data changes, if the power is turned off while the sheet is being driven (while the movement synchronization pulse is being counted), the rotary encoder or the The input circuit goes down, causing a pulse count error, or writing position data to the non-volatile memory is not completed normally, etc., causing a gap between the non-volatile memory position data and the actual sheet position. Can occur. Furthermore, it cannot be determined whether the data in the nonvolatile memory is normal.
[0006]
  Recently, automatic headrest adjustment has also been proposed in which the target position of the headrest is calculated from the front and rear position (sliding position) of the seat and the vertical position of the headrest is automatically determined according to the seat position (for example, the German utility model No. 1). No. 9421781). According to this, when the seat slide position is adjusted, the height of the headrest is set to an appropriate height (standard value) corresponding to the slide position, so that the seated person can adjust the headrest according to the individual body shape. The minute amount may be adjusted.
[0007]
  However, if the slide adjustment is performed after adjusting the height of the headrest according to your preference (or body shape), the adjusted headrest height will change in conjunction with the slide adjustment, and the headrest height will be adjusted again. You will have to adjust it to your liking. When the seat is slid to find coins that have fallen on the floor, the headrest moves up and down unnecessarily. Furthermore, when the reclining is tilted to take a break and the slide is operated backward, the headrest is raised (projected) along with the rear slide, which may interfere with the child seat or luggage of the rear seat. Therefore, a control of automatic headrest adjustment that appropriately corresponds to the usage mode of the electric seat is desired.
[0008]
  Further, in the aspect of storing the position data in the nonvolatile memory as described above, if the seat is being driven when the power is turned off last time, it is determined whether or not the position data of the nonvolatile memory is normal when the power is turned on again. There is a possibility that the headrest can be automatically adjusted at a position where the headrest is displaced.
[0009]
  The first object of the present invention is to prevent the headrest automatic adjustment unnecessary for the user as much as possible. The second object is to realize this without reducing the advantages of the headrest automatic adjustment as much as possible. And When using a non-volatile memory for storing position data, a third object is to enable evaluation of the reliability of the position data in the non-volatile memory. The fourth object is to prevent the above error.
[0010]
[Means for Solving the Problems]
  (1) Electric drive mechanism A that drives the seats (1 to 3) in the front-rear direction as seen from the seated person;
  Front / rear position detection means (A2, A3, 6a, 9a, 10) for detecting the seat position (RPA) in the front / rear direction;
  It is mechanically separated from the electric drive mechanism A.An electric drive mechanism B for vertically driving the headrest (3) of the seat;
  Headrest position detecting means (B2, B3, 6b, 9b, 10) for detecting the vertical position (RPB) of the headrest; means for inputting a driving instruction (SB, SC)) ;
  ThisControlling at least one of the electric drive mechanisms A or B in response to a drive instruction by the force means;Detected by the front / rear position detection meansVertical position (PBo) associated with the front and rear seat position (RPA)ToAutomatic headrest adjustment for driving the headrest (3) via the dynamic drive mechanism B (54-60 in FIG. 7),Control means (10, 9a, 9b);and,
  The control meansWhen the headrest (3) is driven according to a drive instruction by the input means (SB, SC), theBy control meansAutomatic headrest adjustment,Means for inhibiting (CPU 10; 79 in FIG. 8; 51-52-54 in FIG. 6; ArP in FIG. 7; 57 to 63 bypass);
[0011]
  In addition, in order to make an understanding easy, the code | symbol or corresponding matter of the corresponding element of the Example shown in drawing and mentioned later in parentheses is added for reference. The same applies to the following.
[0012]
  According to this, when the user instructs the front / rear (slide) driving of the seat by the input means (SB, SC), the seat moves in the front / rear direction, and in conjunction with this, the seat front / rear position is automatically The headrest moves to the corresponding height (PBo). That is, the control means (10, 9a, 9b) executes the headrest automatic adjustment.
[0013]
  When the user thinks that the standard height (PBs) does not match, the user instructs the headrest to move up and down by the input means (SB, SC) and adjusts the headrest position. Then, automatic headrest adjustment is prohibited, and even if there is a seat slide drive (forward / backward drive) according to the drive instruction by the input means (SB, SC), the headrest moves in conjunction with it. There is no. Reduces the probability of unnecessary automatic headrest adjustments. At the time of readjustment of the seat front-rear position after the headrest vertical position adjustment, the headrest position adjustment ahead of the user is not wasted because the headrest is not interlocked with the sliding movement of the seat. When it is desired to readjust the headrest vertical position after the seat has been slid, the headrest drive instruction may be given by the input means (SB, SC). Thus, after adjusting the headrest vertical position, the seat front / rear position adjustment and the headrest vertical position adjustment can be adjusted independently of each other, so the same user can precisely adjust the seat position and headrest of his / her preference. The height can be set.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
  (2) Electric drive mechanism A that drives the seats (1 to 3) in the front-rear direction as viewed from the seated person;
  Front / rear position detection means (A2, A3, 6a, 9a, 10) for detecting the seat position (RPA) in the front / rear direction;
  It is mechanically separated from the electric drive mechanism A.An electric drive mechanism B for vertically driving the headrest (3) of the seat;
  Headrest position detecting means (B2, B3, 6b, 9b, 10) for detecting the vertical position (RPB) of the headrest;
  Means for inputting drive instructions, registration instructions, and automatic setting instructions for registration positions (SB, SD, SC) ;
  ThisControlling at least one of the electric drive mechanisms A or B in response to a drive instruction by the force means;Detected by the front / rear position detection meansVertical position (PBo) associated with the front and rear seat position (RPA)ToAutomatic headrest adjustment (57 to 63 in FIGS. 6 and 7) for driving the headrest (3) via the dynamic drive mechanism B is performed, and in response to a registration instruction, the seat position (RPA) in the front-rear direction and the headrest at that time Control means (10, 9a, 9b) for registering the vertical position (RPB) in the memory and driving the seat and the headrest to the position registered in the memory in response to an automatic setting instruction to the registered position;and,
  When the control means (10, 9a, 9b) drives the seat and the headrest to the position registered in the memory in response to the automatic setting instruction (SC on) to the registered position,By the control meansMeans for prohibiting the automatic headrest adjustment (CPU 10; 79 in FIG. 8; 51-52-54 in FIG. 6; ArP in FIG. 7; 57 to 63 bypass);
WithElectric seat.
[0015]
  When the automatic posture setting that determines the seat posture is executed in the above registered posture, the posture of the electric seat is the posture registered as appropriate by the user, so the headrest is registered in conjunction with the slight adjustment of the seat longitudinal position. Deviation from the position may impair the advantages of the automatic posture setting.
[0016]
  In this embodiment, since the automatic headrest adjustment is prohibited when the automatic posture setting is performed, the advantage of the automatic posture setting is utilized.
[0017]
  (3-1) While the prohibiting means (CPU 10) prohibits the automatic adjustment of the headrest (FHB = 1), the control means (10, 9a, 9b) sets the seat in the front-rear direction. When driving larger than [Delta] PAp), the prohibition of the automatic headrest adjustment is canceled (FHB = 0) (52 and 53 in FIG. 6).
[0018]
  By the way, for example, when this electric seat is used for a driver seat on a vehicle, there may be a change of a driver (seater). When there is this change, there is a high possibility that a seat front / rear drive instruction is given by the input means (SB, SC). If the headrest position adjustment is prohibited at this time, the seated person who has changed needs to drive the headrest up and down after the seat front-rear drive, which is inconvenient. In the present embodiment, in order to improve this, prohibition of automatic headrest adjustment is canceled when the seat front-rear drive amount becomes larger than a set value (ΔPAp; for example, 2 cm). Therefore, when the seat back-and-forth drive amount exceeds the set value (ΔPAp), the headrest is driven to the height corresponding to the seat back-and-forth position (PBo). And the height of the headrest changes.
[0019]
  (3-2) While the prohibiting means (CPU 10) prohibits the automatic adjustment of the headrest (FHB = 1), the control means (10, 9a, 9b) sets the seat in the front-rear direction for a set time ( When driving over Th), the prohibition of the automatic headrest adjustment is canceled (FHB = 0) (54 and 53 in FIG. 6).
[0020]
  In this embodiment, the prohibition of the automatic headrest adjustment is canceled when the front-rear driving time reaches a set time (Th; time required for 2 cm driving, for example). Therefore, when the seat back-and-forth drive time reaches the set time (Th), the headrest is driven to the height corresponding to the seat back-and-forth position (PBo), and then interlocked with the seat back-and-forth movement while the seat back-and-forth drive continues. And the height of the headrest changes.
[0021]
  (4) Electric drive mechanism A that drives the seats (1 to 3) in the front-rear direction as seen from the seated person;
  Front / rear position detection means (A2, A3, 6a, 9a, 10) for detecting the seat position (RPA) in the front / rear direction;
  It is mechanically separated from the electric drive mechanism A.An electric drive mechanism B for vertically driving the headrest (3) of the seat;
  Headrest position detecting means (B2, B3, 6b, 9b, 10) for detecting the vertical position (RPB) of the headrest;
  Means for inputting drive instructions (SB, SC) ;
  ThisControlling at least one of the electric drive mechanisms A or B in response to a drive instruction by the force means;Detected by the front / rear position detection meansVertical position (PBo) associated with the front and rear seat position (RPA)ToAutomatic headrest adjustment for driving the headrest (3) via the dynamic drive mechanism B (54-60 in FIG. 7),Control means (10, 9a, 9b);
  AboveThe means for detecting the opening and closing of the door (SF) that is opened and closed when seated on the seat and then withdrawn indicates that the door is closedAnd the control meansWhen the headrest (3) is driven according to a drive instruction by the input means (SB, SC),By the control meansMeans for inhibiting the headrest automatic adjustment (CPU 10; 79 in FIG. 8; 51-52-54 in FIG. 6; ArP in FIG. 7; 57 to 63 bypass);The electric seat mounted on the vehicle.
[0022]
  This embodiment is an embodiment in which the electric seat defined in (1) above is installed on the vehicle, and is used, for example, in a driver's seat. According to this embodiment, the operations and effects described in the above section (1) can be obtained on the vehicle as well.
[0023]
  (5) Electric drive mechanism A that drives the seats (1 to 3) in the front-rear direction as viewed from the seated person;
  Front / rear position detection means (A2, A3, 6a, 9a, 10) for detecting the seat position (RPA) in the front / rear direction;
  It is mechanically separated from the electric drive mechanism A.An electric drive mechanism B for vertically driving the headrest (3) of the seat;
  Headrest position detecting means (B2, B3, 6b, 9b, 10) for detecting the vertical position (RPB) of the headrest;
  An electric drive mechanism E for rotationally driving the seat back (2) of the seat in the front-rear direction;
  Seat back angle detecting means (E, Ed, 10) for detecting the rotation angle (RPE) of the seat back (2);
  Means for inputting drive instructions (SB, SC) ;
  ThisControlling at least one of the electric drive mechanisms A, B, E in response to a drive instruction by the force means;Detected by the front / rear position detection meansVertical position (PBo) associated with the front and rear seat position (RPA)ToControl means (10, 9a, 9b) for performing automatic headrest adjustment (57 to 63 in FIG. 7) for driving the headrest (3) via the dynamic drive mechanism B;and,
  When the rotation angle (RPE) of the seat back (2) represents a backward inclination greater than the inclination setting value (PEref) of the seat back,By the control meansAutomatic headrest adjustment,Means for inhibiting (CPU 10; 55 to 63 in FIG. 7 to ArP in FIG. 7, 57 to 63 bypass);Electric seat.
[0024]
  When the seat is slid rearward with the seat back (2) greatly tilted backward, if the headrest is raised (projected) by the automatic headrest adjustment, it may interfere with the child seat or luggage of the rear seat. In the present embodiment, since the headrest automatic adjustment is prohibited in a posture in which the seat back (2) is greatly tilted backward, such a problem is solved.
[0025]
  (6) Electric drive mechanism A that drives the seats (1 to 3) in the front-rear direction as seen from the seated person;
  Front / rear position detection means (A2, A3, 6a, 9a, 10) for detecting the seat position (RPA) in the front / rear direction;
  It is mechanically separated from the electric drive mechanism A.An electric drive mechanism B for vertically driving the headrest (3) of the seat;
  Headrest position detecting means (B2, B3, 6b, 9b, 10) for detecting the vertical position (RPB) of the headrest; means for inputting a driving instruction (SB, SC)) ;
  Controlling at least one of the electric drive mechanisms A or B in response to a drive instruction by the input means;Detected by the front / rear position detection meansVertical position (PBo) associated with the front and rear seat position (RPA)ToAutomatic headrest adjustment (57 to 63 in FIG. 7) for driving the headrest (3) via the dynamic drive mechanism B,Control means (10, 9a, 9b);and,
  Means (SE) for designating permission / prohibition of the automatic headrest adjustment;
  The control means (10, 9a, 9b) performs the headrest automatic adjustment when permission is designated (SE on) by the designation means (SE) (50-51-55-56- in FIG. 6). 57) When the prohibition is specified (SE off), the execution of the automatic headrest adjustment is suspended (50 to 50 in FIG. 6 to 57 to 63 by ArP in FIG. 7);Electric seat.
[0026]
  The user can select whether or not the headrest automatic adjustment is possible by the designation means (SE). For example, a user who is highly compatible with the relationship between the seat front / rear position and the headrest height, which is set for automatic headrest adjustment, that is, the standard characteristics, specifies that headrest automatic adjustment is possible using the designation means (SE). You can take advantage of the benefits. A user having low conformity to the standard characteristics can specify that the headrest automatic adjustment is prohibited by the specifying means (SE), and can avoid unintended headrest automatic driving.
[0027]
  In addition, in the usage mode where the number of seated persons is limited to a few specific persons and the corresponding optimum seat postures are registered in the memory, automatic adjustment of the headrest is virtually unnecessary after registering the optimum seat postures for each person. In this case, unnecessary automatic movement of the headrest can be avoided by designating prohibition of automatic headrest adjustment by the designation means (SE). When setting and registering a seat orientation suitable for a new user, or when updating the registered orientation, the seat orientation is adjusted by specifying automatic headrest adjustment with the designation means (SE), and the seat longitudinal position adjustment After finishing, it is preferable to designate prohibition of automatic headrest adjustment by the designation means (SE).
[0028]
  (7) Electric drive mechanism A that drives the seats (1 to 3) in the front-rear direction as seen from the seated person;
  Front / rear position detection means (A2, A3, 6a, 9a, 10) for detecting the seat position (RPA) in the front / rear direction;
  It is mechanically separated from the electric drive mechanism A.An electric drive mechanism B for vertically driving the headrest (3) of the seat;
  Headrest position detecting means (B2, B3, 6b, 9b, 10) for detecting the vertical position (RPB) of the headrest;
  Means for inputting drive instructions (SB, SC) ;
  ThisControlling at least one of the electric drive mechanisms A or B in response to a drive instruction by the force means;Detected by the front / rear position detection meansVertical position (PBo) associated with the front and rear seat position (RPA)ToControl means (10, 9a, 9b) for performing automatic headrest adjustment (57 to 63 in FIG. 7) for driving the headrest (3) via the dynamic drive mechanism B;
  A seat sensor (SG) for detecting whether a seat occupant is present in the seat cushion (1);
  The control means (10, 9a, 9b) performs the headrest automatic adjustment when the seating sensor (SG) detects the seated person (56 to 63 in FIGS. 6 and 7), and detects the seated person. If not, the headrest automatic adjustment is suspended (56 in FIG. 6 to 57-63 bypass by ArP in FIG. 7);Electric seat.
[0029]
  For example, the present electric seat is used for a front seat of a passenger car, and the front seat without a seated person, that is, the electric seat of the present embodiment is used in the forward direction in order to assist loading and unloading of luggage with respect to the rear seat. When driving the headrest, the headrest does not move because automatic adjustment of the headrest is not performed. That is, there is no useless movement. The same applies when driving backward without a seated person to return the front seat to its original position.
[0030]
  (8)Electric seatEven when the power is offHeadrest vertical positionHoldRuVolatile memory means (17);The control means is(10,9b),Electric drive mechanismBInformation indicating that the vehicle is being driven (ERB = 0) at the start of driving, and information indicating that the vehicle is being stopped (ERB = 1)AboveWrite to non-volatile memory means, immediately after switching from power off to onAboveWhen the information is read from the non-volatile memory means and indicates that it is being driven (ERB = 0), Limit position of headrest via electric drive mechanism B (PBmax) Drive the headrest up and down position (RPB) Of the limit position (PBmax) Updated as follows; any one of (1) to (7) aboveElectric seat.
[0031]
  According to this, by reading the information (ERB) from the non-volatile memory means (17) when the power supply returns to a normal state after power down, the non-volatile memory means (17)Up and downIt can be judged whether the position (EPB) is an error (low reliability) or not (high reliability). Electric drive mechanism at last power offBOf the non-volatile memory means (17) at the time of power-on this timeUp and downWhen the position (EPB) may be in error (ERB = 0), the control means (10, 9b)Headrest is at the limit position via electric drive mechanism B (PBmax) To the limit position of the vertical position of the headrest (PBmax) Because we update toThe reliability of the electric drive can be ensured.
[0032]
  (9) In the above (4), the prohibiting means (CPU 10) cancels the prohibition of the automatic headrest adjustment (FHB = 0) when the means (SF) for detecting the opening / closing of the door is switched to the state indicating the opening of the door. (92 to 96 in FIG. 10).
[0033]
  A seated person may change when the door opens. If there is a change and a new seat occupant drives the seat back and forth, according to the present embodiment, the headrest automatic adjustment prohibition is released when the door is opened. Move to the position corresponding to the front / rear position (PBo). New occupants can take advantage of automatic headrest adjustment.
[0034]
  (10) In (5), when the rotation angle (RPE) of the seat back (2) is smaller than the tilt setting value (PRref) of the seat back, the prohibiting means (CPU 10) Automatic headrest adjustment is executed (101-103-104 in FIG. 10-57 in FIG. 6).
[0035]
  According to this, automatic adjustment of the headrest is performed at an angle at which the seat back (2) stands up and the possibility of interference disappears, and the headrest is automatically adjusted to the height (PBs) corresponding to the seat front-rear position at that time. Driven.
[0036]
  (11) In the above (6), the control means (10, 9a, 9b) stops the automatic headrest adjustment when the designation by the designation means (SE) is switched from permit to prohibit (see FIG. 50-FIG. 6). 57-63 bypass by ArP, 7).
[0037]
  When the user operates the input means (SB, SC) to drive the seat back and forth, the headrest moves unexpectedly by the headrest automatic adjustment, and the user specifies to cancel this headrest automatic adjustment When the means (SE) is switched to the headrest automatic adjustment prohibition, the headrest automatic movement stops there.
[0038]
  (12) In the above (6), when the designation by the designation means (SE) is switched from prohibition to permission, the control means (10, 9a, 9b) executes automatic headrest adjustment there (97-99 in FIG. 10). -100-57 in Figure 7).
[0039]
  When the user switches the designation means (SE) from prohibiting automatic headrest adjustment to enabling, the headrest height (RPB) deviates from the height corresponding to the seat front / rear position (RPA) (PBo). Is automatically driven to the height (PBo) corresponding to the seat longitudinal position (RPA) at that time.
[0040]
  (13) In the above (7), the control means (10, 9a, 9b) executes automatic headrest adjustment when the detection of the seating sensor (SG) is switched from no seated person to present (see FIG. 10). 105-107-108-57 of FIG.
[0041]
  When the height of the headrest (RPB) deviates from the height corresponding to the seat front / rear position (RPA) (PBo) when the seatrest changes from being absent to being present, the headrest corresponds to the seat front / rear position (RPA) at that time. Automatically driven to the height (PBo).
[0042]
  (14)(8) aboveThe control means (10, 9a, 9b) is a non-volatile memory means (17) immediately after switching from power off to on.ReadbrothSaidWhen the information indicates that driving is in progress (ERA = 0), prohibition of the automatic headrest adjustment (57 to 63 in FIGS. 6 and 7) (7A in FIG. 3, 49 to 57 in FIG. 63 bypass);As described in (8) aboveElectric seat.
[0043]
  According to this, since the headrest automatic adjustment that may deviate from the appropriate position based on the sheet position data generated based on the memory data that may cause a data error is prohibited, the headrest automatic adjustment error is Is prevented.
[0044]
  (15) The position detecting means (10, A2, A3, 6a, 9a) includes means (A3, 6a) for detecting that the sheet (1) has reached a specific position (PAmin, PAref, PAmax), and data In response to the detection, the processing means (10, 9a) updates the sheet position data (RPA) to data (PAmin, PAref, PAmax) determined at the specific position.
[0045]
  As a result, even when the reliability of the sheet position data (RPA) is low, the reliability of the sheet position data is high since the arrival of the specific position is detected, and the reliability and stability of the mechanism drive control based on it is high. Become.
[0046]
  (16) When the seat position data (RPA) is updated in response to the specific position arrival detection, the control means (10, 9a, 9b) cancels the prohibition of the headrest automatic adjustment (34, 35 in FIG. 5; 40 to 42 and FIA = 0, and execute steps 57 to 63 through 49 to 50-51-55-56 in FIG. 6).
[0047]
  Thereby, automatic headrest adjustment based on highly reliable sheet position data (RPA) is possible.
[0048]
  (17) When the control means (10, 9a, 9b) is switched from the prohibition of the automatic headrest adjustment to the release, the headrest is moved to the vertical position associated with the seat position in the front-rear direction via the electric drive mechanism B. Are driven (from 109 in FIG. 10 to 57 to 63 in FIGS. 6 and 7).
[0049]
  This realizes automatic headrest adjustment based on highly reliable seat position data (RPA).
[0050]
  Other objects and features of the present invention will become apparent from the following description of embodiments with reference to the drawings.
[0051]
【Example】
  FIG. 1 shows an outline of the mechanism of one embodiment of the present invention. The electric seat shown in FIG. 1 is a driver seat, which is composed of a seat cushion 1 (sitting portion), a seat back 2 and a headrest 3, and is connected via a well-known electric drive mechanism A (slide adjustment mechanism). The vehicle floor is supported so as to be movable in the direction in which the longitudinal axis of the vehicle extends (hereinafter referred to as the longitudinal direction). The front part and the rear part of the seat cushion 1 are driven up and down by well-known electric drive mechanisms C and D, respectively, thereby adjusting the height of the seat cushion 1 and the inclination in the front-rear direction.
[0052]
  The seat back 2 is coupled to the seat cushion 1 so as to be tiltable in the front-rear direction by a known electric drive mechanism E (reclining mechanism). The headrest 3 is supported on the upper portion of the seat back 2 so as to be movable in the vertical direction (correctly in the direction of contacting and separating from the front end of the seat back 2) via a known electric drive mechanism B (elevating mechanism). . The seat back 2 further has a lumbar support that protrudes / retreats to the seated person by rotating around a horizontal axis, and a known electric drive mechanism F rotates (projects / retracts) the lumbar support. .
[0053]
  FIG. 2 shows a configuration of an electric element incorporated in the above-described electric drive mechanisms A to F and a seat ECU (electronic control device for seat posture control) that drives each mechanism. The electric motor A1, which is the prime mover of the electric drive mechanism A that drives the seat in the front-rear direction, is connected to the reverse rotation circuit 4a and the forward rotation circuit 5a. The reverse rotation circuit 4a is rotated by the motor controller 9a (driven backward). When instructed, the electric motor A1 is energized for reverse rotation, whereby the electric motor A1 rotates in the reverse direction and the seat moves forward (front direction). When the motor controller 9a instructs forward rotation (drive forward), the forward rotation circuit 5a energizes the electric motor A1 for forward rotation, whereby the electric motor A1 rotates forward, and the seat moves backward (rear direction). Move to. In any energization, the current flows through the resistor ra for overload detection, and the overload detector 6a monitors the voltage drop (current value) of the resistor ra, which corresponds to reaching the movement limit position of the mechanism. If it becomes a high value (a value equal to or higher than the reference value for overload detection), an overload signal (a signal indicating an overload) is generated and applied to the motor controller 9a.
[0054]
  A rotary encoder A2 is connected to the rotating shaft of the electric motor A1, and one pulse of movement synchronization pulse is generated for each rotation of the rotor of the electric motor A1 by a predetermined small angle, and the pulse processing circuit 7a outputs this pulse. Amplified and shaped and supplied to the motor controller 9a. ON while the seat is in the first half range from the front side to the reference point PAref, with the reference point PAref in the middle of the front limit position PAmin to the rear limit position PAmax in the seat drive range (movement region) of the electric drive mechanism A (Switch contact), the reference point PAref, and the switch A3 for detecting the seat front-rear position and the switch operation cam (not shown) that remain off (switch open) while in the rear half range from the reference point PAref. A detection circuit 8a connected to the switch A3 supplies a detection signal indicating ON / OFF of the switch A3 to the motor controller 9a.
[0055]
  While the power switch SPS for the electric seat is connected to the on-board battery BAT and the power switch SPS is closed (ON) and the self-holding relay PRY is ON, the power circuit PSC is an electric circuit shown in FIG. Although all the required operating voltages are applied to each part, even if the power switch SPS is on, the power supply circuit PSC is controlled by the CPU 10, the ROM 11, the RAM 12, the EEPROM 17, and the CPU 10 while the self-holding relay PRY is off. The minute electric power required for holding the position data and detecting the input is always supplied to the interface part required for the state change recognition of the input switches SA to SE and the detection switches SF and SG.
[0056]
  Here, when the power switch SPS is off or the on-board battery BAT is not connected, the state where all the electric circuits in the seat ECU shown in FIG. 2 are disconnected from the power source is referred to as a “power off state”, and is described above. The state in which only a small amount of power is partially supplied is referred to as a “standby state”, and the state in which a required operating voltage is applied to all the electric circuits is expressed as an “active state”. The EEPROM 17 is a nonvolatile memory. Therefore, the data written in the “power-off state” is retained (saved), but the CPU 10 and the RAM 12 cannot retain the data. In the “power off state”, only the EEPROM 17 holds the position data of what the electric drive mechanisms A to F drive.
[0057]
  When the power switch SPS is connected to the on-board battery BAT and the power switch SPS is turned on, the power supply circuit PSC starts to supply a small amount of power, which causes the seat ECU to enter the “standby state”. When entering, the CPU 10 turns on the self-holding relay PRY, so that the power supply circuit PSC applies a required operating voltage to all of the electric circuits to bring the seat ECU into the “active state”, and the I / O port The status of each part is checked via the controller 16, and if each part is normal, the stored data is read from the EEPROM 17, and the position data is set in the position registers RPA to RPF addressed to each mechanism. The contents of this process will be described later in detail with reference to FIG.
[0058]
  After the “active state”, when the state in which the switch input or the detection switch does not change continues for the set time Tw, the CPU 10 turns off the self-holding relay PRY and sets the seat ECU to the “standby state”. Thereby, the power supplies of the mechanisms A to F and the mechanism driving devices Ad to Fd are turned off. When the switch input or the detection switch changes in the “standby state”, the CPU 10 turns on the self-holding relay PRY to the “active state” (power on to Ad to Fd), and responds to the input or change in state. Execute the process. That is, the input or state change is encoded to generate and give commands to the mechanism driving devices Ad to Fd. The contents of this processing will be described later in detail with reference to FIG.
[0059]
  While the motor controller 9a of the mechanism drive device Ad executes the command and drives the electric motor A1, every time the rotary encoder A2 generates one pulse, the front / rear position register assigned to the internal memory of the controller 9a is assigned. The position data is incremented or decremented to update the position data. When the switch A3 is switched ON / OFF, the position data is updated to PAref indicating the reference point position, and the overload detection circuit 6a When overload is detected, the motor drive is stopped. When driving forward, PAmin indicating the front limit position is displayed in the front / rear position register, and when driving rearward, the rear limit position is stored in the front / rear position register. PAmax indicating the position is written and the position data is retained, but the controller can be used not only in the “power off state” but also in the “standby state”. a is incapable of maintaining the position data is itself a power-off. Therefore, during the driving of each mechanism A to F, the CPU 10 similarly updates and holds the above-described position data, and immediately after switching from the “standby state” to the “active state”, the CPU 10 holds it. The position data RPA to RPF addressed to the mechanisms A to F to be transferred are transferred to the mechanism driving devices Ad to Fd.
[0060]
  The mechanism driving devices Ad to Fd have the same hardware configuration and the same functions. However, data to be set according to the individual characteristics of the mechanisms A to F, such as setting values and constants, are individually determined.
[0061]
  The operation display panel includes various input switches SA to SE and a light emitting diode LD which is an indicator lamp, and the CPU 10 reads a state change of the input switch, that is, a driver (user) input via the panel I / F 14. . Further, the CPU 10 reads the state of the seating sensor SG and the driver door opening / closing detection switch SF provided in the seat cushion 1 via the external I / F 15. Table 1 below shows symbols and functions assigned to the input switches and detection switches shown in FIG.
[0062]
[Table 1]

[0063]
  A switch group SA composed of three switches SA1 to SA3 is an open / close switch for identifying a seat user. When one of the switches SAi (i = 1, 2, or 3) is pressed, the switch group SA is closed. The other two are mechanically forced to open. Pressing a switch that is already closed again switches it to open and opens the previous switch. For the seat ECU, the switches SA1 to SA3 include seat attitude data (front and rear position data RPA, headrest vertical position data RPB, cushion front vertical position data RPC, cushion rear vertical position data RPD, seat back inclination data RPE, and , A set of lumbar support rotation position data RPF, that is, a position data group) is registered in the seat ECU (EEPROM 17), and is read out from the data table to be accessed or named. is there.
[0064]
  As shown in Table 1, the momentary switch SB that is turned on only while being pressed with a finger is a total of 12 manual drive forward / reverse drive instruction switches assigned to each mechanism A to F. Yes, for example, one of the pair SBAf and SBAr, SBAf is a switch that instructs the mechanism A to drive the sheet forward, and SBAr is a switch that instructs the backward drive, which is pressed with a finger. While on, this directs driving. SBBu and SBBd are for an upper drive instruction and a lower drive instruction for the headrest 2. SBCu and SBCd are for an upper drive instruction and a lower drive instruction for the front portion of the seat cushion 2. SBDu and SBDd are for the upper drive instruction and the lower drive instruction of the rear part of the seat cushion 2. SBEf and SBEr are used for instructing to rotate the seat back 2 in the forward direction and instructing it to rotate in the rear direction. SBFf and SBFr are used for instructing to drive the lumbar support in the forward direction (direction protruding toward the seated person) and for instructing to rotate in the rear direction.
[0065]
  The automatic attitude setting switch SC reads out the sheet attitude data registered in the memory (EEPROM 17) or the standard attitude data in the ROM 11 and instructs to set the sheet in the attitude. When this switch SC is turned on, if any of SA1 to SA3 is turned on at that time, the posture data addressed to the switch SAi is read from the posture data table i (one area of the memory) of the EEPROM 17. It is. When all of SA1 to SA3 are off, the standard attitude data written in the standard attitude data table (one area of the memory) of ROM 11 is read.
[0066]
  The posture registration switch SD instructs to register the sheet posture data in the EEPROM 17, and when this switch SD is turned on, if any one of SA1 to SA3 is turned on at that time, the state on the EEPROM 17 is changed. The sheet attitude data (set of RPA to RPF) at that time is written in the attitude data table i addressed to the switch SAi. This writing is not performed when all of SA1 to SA3 are off.
[0067]
  The headrest interlock permission switch SE is an open / close switch, and its closing (on) is a headrest automatic that automatically adjusts the height of the headrest to an appropriate position corresponding to the position RPA in response to the change of the front / rear position RPA of the seat. The adjustment mode is designated (permitted), and opening (off) of the switch SE cancels (prohibits) the headrest automatic adjustment mode.
[0068]
  The door opening / closing detection switch SF detects opening / closing of the driver's seat door, and the closing (ON) of the switch SF means the opening of the door, and the opening (OFF) means the closing of the door. The seating sensor SG of the driver seat (seat cushion 1) detects whether or not there is a seated person on the driver seat. On (closed) of the seating sensor SG means presence of a seated person, and off (opened) means no seating. To do. The operation display panel has nine light emitting diodes LD. The breakdown is shown in Table 2 below.
[0069]
[Table 2]

[0070]
  The light emitting diodes LD1 to LD3 are lit when the switches SA1 to SA3 are turned on, respectively, and mean which one of the posture data tables 1 to 3 on the EEPROM 17 is designated. Each of the light emitting diodes LDA to LDF is assigned to each of the mechanisms A to F. When the position data of the position register corresponding to the assigned mechanism is not a detection value, the mechanism is being driven, and Illuminated when the overload detection and the position register position data are dissociated (a mechanism abnormality is considered).
[0071]
  FIG. 11A shows the position detection switches A3 and B3 with the longitudinal driving range and longitudinal position data of the seat by mechanism A on the horizontal axis and the vertical movement range and vertical position data of the headrest by mechanism B on the vertical axis. The area division defined by ON / OFF is shown. By combining the switch A3 of the mechanism A with a switch operation cam (not shown), the switch A3 has a seat front-rear position RPA on the side of the front limit position (PAmin = 0 mm) which is the base point of the moving region from the reference point PAref (130 mm). On, the reference point PAref and the rear limit position (PAmax = 240 mm), which is the end point of the moving region, are turned off. By combining the switch B3 of the mechanism B with a switch operation cam (not shown), the switch B3 is turned on while the headrest vertical position RPB is on the lower limit position (PBmin = 0 mm) side which is the base point from the reference point PBref (35 mm). It is off between the point PBref and the upper limit position (PBmax = 72 mm) which is the end point. In other words, the reference point (PAref = 130 mm, PBref = 35 mm point IPb) at which the position detection switches A3 and B3 are switched is the moving area (PAmin = 0 mm to PAmax = 240 mm, PBmin = 0 mm to PBmax = 72 mm; the intermediate point is 120 mm, 36 mm) (PAref = 130 mm, PBref 35 mm).
[0072]
  Each of the other mechanisms C to F has a similar position detection switch (C3 to F3: not shown) and a switch operation cam (not shown). At one point PCref, PDref, PEref, and PFref, the switch is turned on / off.
[0073]
  11 indicates the headrest target position (appropriate position) corresponding to the seat front-rear position when the headrest vertical position is automatically adjusted in conjunction with the seat front-rear position. When designated, the headrest is automatically driven to the position of the oblique line as the seat moves back and forth.
[0074]
  3 to 10 show an outline of the control operation of the CPU 10 shown in FIG. Please refer to FIG. 3 first. When the power switch SPS of the electric seat is connected to the on-board battery BAT and the power switch SPS is turned on (closed), the power supply circuit PSC supplies minute electric power to the standby monitoring element such as the CPU 10, thereby causing the seat ECU to “ "Waiting state". In response to this power-on (supply of minute power), the CPU 10 sets its internal registers, counters, timers, and the like to the standby state, and sets the input / output port to the standby signal level (step 1). In the following, the word “step” is abbreviated in parentheses, and step no. Write numbers and symbols only.
[0075]
  At this time, the CPU 10 does not hold the position data of the mechanisms A to F. Next, the CPU 10 turns on the self-holding relay PRY and starts the timer Tw (2, 3). When the relay PRY is turned on, the power supply circuit PSC applies an operating voltage to the mechanism driving devices Ad to Fd, and the seat ECU becomes “active”. As a result, the motor controllers 9a, 9b,... Of each of the drive devices Ad to Fd execute initialization of their own power-on response and enter a command standby state waiting for a command from the CPU 10, and the position detection switches A3, A3,. The state of B3,... Can be read. The CPU 10 can also know the state of the position detection switches A3, B3,... Via the I / O 16 and the motor controllers 9a, 9b,. However, at this time, since the motor controllers 9a, 9b,... Do not hold the current position data, both the CPU 10 and the motor controllers 9a, 9b,. The set of positions is called the seat posture).
[0076]
  Here, the CPU 10 reads the control data ERA to ERF and the mechanism position data EPA to EPF from the EEPROM 17 (4). The contents of these data are as follows:
ERA: Whether mechanism A (motor A1) was being driven immediately before the last power-off,
        1 bit indicating whether it was stopped. Driving = “0” / Stopping = “1”,
ERB: Similar to ERA, regarding mechanism B, driving = “0” / stopping = “1”,
ERC: Similar to ERA, regarding mechanism C, driving = “0” / stopping = “1”,
ERD: Similar to ERA, regarding mechanism D, driving = “0” / stopping = “1”,
ERE: Similar to ERA, regarding mechanism E, driving = “0” / stopping = “1”,
ERF: Similar to ERA, regarding mechanism F, driving = “0” / stopping = “1”,
EPA: Last sheet front / rear position data RPA written until the last power-off.
EPB: Headrest vertical position data RPB, similar to EPA
EPC: Same as EPA, vertical position data RPC of seat cushion front,
EPD: Same as EPA, vertical position data RPD of the rear part of the seat cushion,
EPE: Same as EPA, seat back inclination angle data RPE,
EPF: Similar to EPA, lumbar support protrusion position data RPF.
[0077]
  When no data is written in the EEPROM 17 (and when the memory is cleared), the control data ERA to ERF are all “0”. 1. Determination of initial seat posture value immediately after the power switch SPS is turned on (IVD A to F)
    1A. Determination of initial value of seat front-rear position RPA (IVD A)
  Here, the CPU 10 checks the control data ERA addressed to the mechanism A (5A), and if it is “1”, the position data EPA addressed to the mechanism A read from the EEPROM 17 is the front / rear position of the seat at the previous power-off time. Since the possibility of correctly expressing (the same current position) is high (high reliability), the EPA is written in the sheet front / rear position register RPA addressed to the mechanism A allocated to the internal memory of the CPU 10 or the RAM 12 (6A). Then, the data RPA of the position register RPA is transferred to the motor controller 9a of the driving device Ad of the mechanism A (13A). The motor controller 9a writes the received position data RPA to the position register assigned to the internal memory.
[0078]
  However, if the control data ERA is “0”, it is considered that the reliability of the position data EPA that correctly represents the current sheet position is low, that is, the possibility of a data error is high. Therefore, the CPU 10 stores “0” in the register FIA. 1 ”(position data setting based on the detected value is incomplete) is written (7A), the light emitting diode LDA is turned on (8A), and status information is requested from the mechanism drive device Ad (motor controller 9a). Read into self (9A). Here, the state signal of the position detection switch A3 is extracted from the read state information, and predetermined position data is written in the position register RPA as a temporary one. That is, when the position detection switch A3 is off (area A or B shown in FIG. 11A), PAmax = 240 mm is written in the position register RPA. When the switch A3 is on (area B or C), PAref = 130 mm is written in the position register RPA (10A to 12A).
[0079]
    1B. Determination of initial value of headrest vertical position RPB (IVD B)
  Similarly to the above processing (IVD A), if the control data ERB is “1”, the EPB is written into the headrest vertical position register RPB addressed to the mechanism B (6B), and the data RPB of the position register RPB Is transferred to the motor controller 9b of the driving device Bd of the mechanism B (13B). The motor controller 9b writes the received position data RPB to the position register assigned to the internal memory. However, if the control data ERB is “0”, “1” is written to the register FIB (7B), the light emitting diode LDB is turned on (8B), the status information is requested to the mechanism driving device Bd, Read (9B). Here, the status signal of the position detection switch B3 is extracted from the read status information, and predetermined position data is written in the position register RPB as a temporary one. That is, when the position detection switch B3 is off (area A or B shown in FIG. 11A), PBref = 35 mm is written to the position register RPB, and when the switch B3 is on (area C or D) PBmin = 0 mm is written in the position register RPB (10B to 12B).
[0080]
  The contents of other initial value determinations IVD C to F for setting the initial values in the position registers RPC to RPF addressed to the other mechanisms C to F are the same as those of the above-described IVDs A and B.
2. Automatic headrest adjustment (HRA) immediately after the power switch SPS is turned on
  Please refer to FIG. Next, the CPU 10 checks the data in the registers FIA and FIB (15), and if at least one of them is “1” (position data setting based on the detected value is incomplete), the seat front / rear position data RPA Alternatively, since the headrest vertical position data RPB is inaccurate, the headrest is temporarily set at a high position where the reliability of protection of the seated person is high (16 to 18). That is, the inclination angle data RPE of the seat back 2 with respect to the seat cushion 1 is read from the position register RPE, and it is checked whether it is equal to or less than the reference angle (reference point) PEref (16). The minimum value of the angle value represented by the angle data RPE (PEmin = 0 °) is an angle at which the seat back 2 reaches the front limit position and the seat back 2 is approximately 60 degrees relative to the seat cushion 1 (the floor of the vehicle The seat back 2 is parallel to the vehicle floor (horizontal) at the maximum angle value (PEmax = 120 °) represented by the angle data RPE. It is. Reference angle (reference point) PEref = 50 ° (110 ° with respect to the floor of the vehicle).
[0081]
  In step 16, when the position (tilt angle) data RPE of the seat back 2 is equal to or smaller than PEref, that is, when the angle of the seat back 2 with respect to the vehicle floor is equal to or smaller than 110 °, the seat back 2 substantially stands up. Therefore, there is no problem in the driving of the headrest 3 ascending, that is, extrusion. In this case, the CPU 10 corresponds to the data of the position register RPA (here, PAref = 130 mm or PAmax = 240 mm), the headrest target position (height) PBs (PAB = 130 mm compatible PBref = 35 mm or PAmax = 240 mm compatible) (PBmax = 72 mm) is calculated (17), and the controller 9b is instructed to drive the headrest to PBs (18). That is, PBs is given as the headrest drive target position to the controller 9b, and the drive to the target position is instructed. The controller 9b compares the target position PBs (= PBref or PBmax) with the data RPB of the position register RPB inside the controller 9b (RPB = PBref at this time), and the position RPB of the headrest 2 is the target position PBs. The electric motor B1 is driven in a direction matching the above. The CPU 10 monitors the output signals of the overload detection circuit 6b, the pulse processing circuit 7b, and the position detection circuit 8b until the controller 9b notifies the completion of driving to the target position PBs.
[0082]
  For example, when the power switch SPS is connected to the vehicle battery BAT and the power switch SPS is switched from OFF to ON, both the control data ERA and ERB are “0” (both the position data EPA and EPB are low in reliability). Consider the case. In this case, when the front-rear position RPA of the seat is the area A or D in FIG. 11A, the position data RPA = PAmax (240 mm), so the target position PBs = PBmax (72 mm) is calculated. Is done. In this case, when the headrest 3 is in the area A (for example, the point a0 shown in FIG. 11B), the position data RPB = PBref (35 mm), so the controller 9b uses the PBmax (72 mm) − Assuming that driving for PBref (35 mm) is necessary, the headrest 3 is driven upward. Since the actual position of the headrest 3 before the driving is equal to or greater than PBref (35 mm), the headrest 3 is driven before or after driving for PBmax (72 mm) −PBref (35 mm). 3 reaches the upper limit position PBmax (72 mm), and the output signal of the overload detection circuit 6a is switched from a level indicating no overload to a level indicating overload. In response to this switching, the controller 9b stops driving the electric motor B1. In response to an overload, the controller 9b and the CPU 10 rewrite the position data of each position register RPB to PBmax. Then, the CPU 10 clears the register FIB and turns off the light emitting diode LDB. As described above, the headrest 3 moves from a point a0 to a1 shown in FIG. That is, the headrest 3 in the area A is set to the upper limit position PBmax of the area by the initial position setting of the power-on response.
[0083]
  When the power switch SPS is switched from OFF to ON, the seat position and the headrest position are within the area D (for example, the point d0 shown in FIG. 11B), and the target position PBs = PBmax (72 mm). When calculated, since the headrest position data RPB = PBmin (0 mm), the controller 9b drives the headrest 3 on the assumption that the drive for PBmax (72 mm) −PBmin (0 mm) is necessary. Since the actual position of the headrest 3 before this driving is equal to or greater than PBmin (0 mm), the position detection switch B3 is first turned from on to off before the driving for PBmax (72 mm) −PBmin (0 mm) is completed. Switch. At that time, the headrest 3 is the position RBref of the reference point. In response to this switching, the controller 9b and the CPU 10 rewrite the position data of each position register RPB to PBref. Then, the CPU 10 clears the register FIB and turns off the light emitting diode LDB. Here, since the target position is PBmax (72 mm) and the current position RPB is PBref (35 mm), the controller 9b continues to drive the headrest 3 upward and every time the pulse processing circuit 7b outputs a movement synchronization pulse, the controller 9b The CPU 10 updates the position data RPB of the position data register RPB by the minimum unit by interrupt processing. That is, the position data RPB is updated as the headrest moves. Then, when the position data RPB becomes PBmax (72 mm) or the output of the overload detection circuit 6a is switched to one indicating overload, the controller 9b stops driving the headrest 3. As described above, the headrest 3 moves to the upper limit position PBmax through points d0 to d1 shown in FIG. 11B, for example. That is, by setting the initial position of the power-on response, the headrest 3 in the area D that is lower than the appropriate position (thick solid line) corresponding to the seat front-rear position RPA is set to the upper limit position PBmax. That is, it is automatically set to a position where there is a high possibility of protecting the seated person when a rear-end collision occurs.
[0084]
  When the power switch SPS is switched from OFF to ON and the seat front-rear position RPA is the area B or C in FIG. 11A, the position data RPA = PAref (130 mm). Target position PBs = PBref (35 mm) is calculated. In this case, when the headrest 3 is in the area B (for example, the point b0 shown in FIG. 11C), the position data RPB = PBref (35 mm), so the controller 9b does not drive the headrest 3. The fact that the headrest 3 is in the area B means that the headrest 3 is at a position higher than the headrest proper position PBs corresponding to the front-rear position RPD of the seat, that is, a position that is highly likely to protect the seated person when the headrest 3 is bumped. means. The driver when the power is turned on this time is likely to be the same as the driver when the power was last turned off, and the seat position (headrest position) is also likely to be the same. Sometimes it is desirable not to drive the headrest.
[0085]
  When the seat position and the headrest position are within the area C (for example, the point c0 shown in FIG. 11C) and the target position PBs = PBref (35 mm) is calculated, the headrest position data RPB = PBmin (0 mm) Therefore, the controller 9b drives the headrest 3 upward, assuming that driving for PBref (35 mm) −PBmin (0 mm) is necessary. Since the actual position of the headrest 3 before this driving is equal to or greater than PBmin (0 mm), the position detection switch is used until the driving for PBref (35 mm) -PBmin (0 mm) is completed or when driving for that amount is completed. B3 switches from on to off. At that time, the headrest 3 is the position RBref of the reference point. In response to this switching, the controller 9b and the CPU 10 rewrite the position data of each position register RPB to PBref. Then, the CPU 10 clears the register FIB and turns off the light emitting diode LDB. Here, since the target position PBs is PBref (35 mm) and the current position RPB (data in the position register RPB) is PBref (35 mm), the controller 9b stops driving the headrest 3. As described above, the headrest 3 moves from the point c0 to c1 shown in FIG. That is, the headrest 3 that was in the area D lower than the appropriate position RBs corresponding to the seat front-rear position RPB by the initial position setting of the power-on response is set to the appropriate position or a reference position PBref higher than that.
[0086]
  3. Regular seat posture control
  Please refer to FIG. After the initial values are set in the position registers RPA to RPF addressed to the mechanisms A to F as described above (IVD A to F) and the headrest is initially adjusted (HRA), the panel I / F 14 is set at a predetermined cycle. Then, the state reading (24) of the switch connected to the external I / F 15 is repeated, and when all the switches SB are turned off and there is no state change and the timer Tw is timed over, the self-holding relay PRY is turned off (19 ~ 22). As a result, the seat ECU enters a “standby state”, and the mechanism driving devices Ad to Fd are powered off.
[0087]
  However, the CPU 10 holds the position data RPA to RPF and repeats the state reading (19). When one of the switches SB is turned on or changed, the timer Tw is started (23) and the self-holding relay PRY is turned on (24). As a result, the seat ECU enters an “active state”. Next, the CPU 10 transfers the position data RPA to RPB held in the position registers RPA to RPB to the motor controllers of the mechanism driving devices Ad to Fd, and the motor controllers 9a, 9b,. Each position data RPA to RPB is written to a position register inside the controller. Next, referring to the data in the registers FIA to FIF (see steps 7A and 7B in FIG. 3), when the data is 1, the corresponding light emitting diodes LDA to LDF are turned on. For example, if the data in the register FIA is 1, the light emitting diode LDA is turned on. Referring to FIG. 5, the status data read in the latest “read status” (19) is referenced to check which of the switches SA1 to SA3 is on (25, 27, 29). If any SAi is on, the light emitting diode LDi associated therewith is turned on (26, 28, 30, 31).
[0088]
  3A. Seat slide forward control (AfP)
  Please refer to FIG. Next, the CPU 10 checks whether the seat advance instruction switch SBAf is on (32), and if it is on, executes the slide advance control (AfP). In this slide forward control (AfP), the control data ERA of the EEPROM 17 is rewritten to “0” (during motor driving) (36), the sheet is driven forward (39), and the sheet is driven forward (movement synchronization). Every time a pulse is generated, the position data RPA of the respective seat front / rear position registers RPA of the CPU 10 and the motor controller 9a is updated (48 in FIG. 6). When the position detection switch A3 is switched from OFF to ON during driving of the seat, the CPU 10 and the motor controller 9a rewrite the position data of each position register RPA to PAref (40, 41), and the position of the register FIA. “1” indicating that the setting of data is incomplete is cleared (42), and the light emitting diode LDA indicating incomplete is turned off (43).
[0089]
  The position data RPA in the position register RPA is changed before the position detection switch A3 is switched from off (area A) to on (area B) by updating the position data RPA (48) in response to the generation of the movement synchronization pulse. Depending on the decrement of the position data RPA in response to the generation of the movement synchronization pulse, there is a possibility of switching from indicating the position in the area A to indicating the position in the area B. That is, it is conceivable that the region detection by the position detection switch A3 and the position data by the up / down counting of the movement synchronization pulse become inconsistent. Therefore, in this embodiment, referring to FIG. 6, while the position detection switch A3 is OFF (area A), when the position data RPA indicates the position in the area B due to the down-count of the movement synchronization pulse, The position data RPA is kept at the limit value of the area A (RPref = 130 mm) (48a to 48c-48f-48g), and decrement (countdown; updating of position data) is held (48f, 48g). If the position data RPA exceeds the lower limit position (negative value) even though the sheet position does not reach the lower limit position (base point: PAmin = 0) (overload is not detected), the position data RPA is changed to the lower limit position. (PAmin = 0) (48d, 48e). The same applies to the slide backward control (ArP), and while the position detection switch A3 is ON (area B) during the slide backward drive, the position data RPA is positioned in the area A by the up-counting of the movement synchronization pulse. In this case, the position data RPA is kept at the limit value (RPref-1) of the area B, and the increment (count up) is put on hold. Further, when the position data RPA becomes a value exceeding the upper limit position (PAmax + 1) even though the sheet position does not reach the upper limit position (end point; PAmax) (overload is not detected), the position data RPA is changed to the upper limit position (PAmax). Keep on.
[0090]
  Refer to FIG. 5 again. When the electric motor A1 becomes overloaded (the motor current value flowing through the resistor ra is equal to or greater than the set value), the front drive of the seat is stopped, and the data in the position register RPA is updated to the base value PAmin (= 0), The register FIA is cleared and the light emitting diode LDA is turned off (33, 34, 35-44). Also, when the seat advance instruction switch SBAf returns from on to off, the forward driving of the seat is stopped (32-44). When the motor drive is stopped, the data RPA of the position register RPA whose data has been updated during the motor drive is written to the register EPA of the EEPROM 17 (45), and the data of the register FIA is “0” (the data RPA is based on the detected value). If it is a value, the control data ERA = "1" (motor stopped: means that the data EPA in the register EPA is an accurate value) is written into the EEPROM 17 (47).
[0091]
  Assuming that the power switch SPS is opened while the motor A1 is being driven (ERA = 0 in step 36), the seat ECU thus enters the "power off state". 34, 35 and 44 to 47 are not executed. As a result, the control data ERA of the EEPROM 17 remains “0”, and the position data EPA remains that representing the sheet position immediately before the motor A1 is driven, and does not reflect the position change due to the current motor drive. Next, when the power is turned on, steps 7A to 12A in FIG. 3 are executed.
[0092]
  If the power switch SPS is opened while the motor A1 is stopped (ERA = 1 in step 47), the next time the power is turned on, step 6A in FIG. 3 is executed and the position data EPA (written in step 45) is executed. RPA) is set in the sheet position data RPA, which correctly represents the current sheet position.
[0093]
  When starting to advance the seat, the position data RPA of the position register RPA at that time is saved in the register PRPA (37) and the timer Th is started in order to monitor the driving amount and elapsed time from that point. (38). The CPU 10 refers to these drive amounts and elapsed time in the control related to the automatic adjustment of the headrest described below.
[0094]
  3B. Automatic headrest adjustment
  While driving the seat in the front-rear direction, the CPU 10 checks whether the conditions for performing the headrest automatic adjustment in conjunction with the front-back movement of the seat are satisfied. condition is,
  1) The seat front / rear position data RPA and the headrest vertical position data RPB are accurate (FIA = 0 & FIB = 0).
  2) The headrest automatic adjustment mode instruction switch SE is turned on (permitted), the inclination angle RPE of the seat back 2 is equal to or smaller than the reference value PRref, the seat cushion 1 is seated (SG on), and (AND: logical product) The headrest up / down drive instruction switches SBBu, SBBd have not been turned on so far after becoming the “active state” (FEB = 0),
  3) The headrest automatic adjustment mode instruction switch SE is turned on (permitted), the inclination angle RPE of the seat back 2 is equal to or less than the reference value PRref, the seat cushion 1 is seated (SG on), and (AND: logical product), The seat front / rear drive amount is equal to or greater than the set value ΔPAp.
  4) The headrest automatic adjustment mode instruction switch SE is turned on (permitted), the inclination angle RPE of the seat back 2 is equal to or smaller than the reference value PRref, the seat cushion 1 is seated (SG on), and (AND: logical product), Time Th has elapsed from the start of seat front-rear driving, or
  5) The headrest automatic adjustment mode instruction switch SE is turned on (permitted), the inclination angle RPE of the seat back 2 is equal to or smaller than the reference value PRref, the seat cushion 1 is seated (SG on), and (AND: logical product), There is seat back-and-forth drive after the seat orientation is registered in the RAM 11, and the drive amount becomes equal to or greater than the set value ΔPAp or time Th has elapsed since the start of seat back-and-forth drive.
  The first party 1) is established, and the remaining four parties 2) to 5) are established.
[0095]
  The success or failure of the above 1) is checked at step 49 in FIG. 6 and step HCO in FIG. The CPU 10 has a register FHB for determining the success or failure of each of the above conditions 2) to 5), and the CPU 10 clears the register FHB when it is in the “active state” (the self-holding relay PRY is turned on). The data “0” in the register FHB means that headrest automatic adjustment is possible (permitted), and the data “1” means impossible (prohibited). When the headrest is driven in response to the headrest up / down drive instruction switch SBBu or SBBd being turned on, the CPU 10 writes “1” (prohibited) in the register FHB (79 in FIG. 8). Further, the CPU 10 writes “1” (prohibited) to the register FHB even when an instruction to automatically set the sheet posture to the posture registered in the EEPROM 17 is given (87-88 in FIG. 9). This FHB = “1” (prohibited) is cleared when step 52 or 54 is established (YES) after steps 37 and 38 are executed. That is, it is rewritten to FHB = "0" (permission).
[0096]
  Reference is now made to FIGS. The CPU 10 checks the success or failure of the condition 2) in steps 50 and 51 and steps 55 and 56 in FIG. 6. When the condition 2) is satisfied (headrest automatic adjustment: permitted), the CPU 10 checks step 50-51-. Go to step 57 via 55-56. Further, the CPU 10 checks whether or not the above condition 3) is satisfied in steps 50, 51, 52, 55, and 56. If the condition is satisfied, the CPU 10 goes to steps 50-51-52-53-55-56, Proceed to 57. Further, the CPU 10 checks the success or failure of the above condition 4) in steps 50, 51, 52, 54, 55, and 56, and if it is satisfied, the step 50-51-52-54-53-55-56. Then, the process proceeds to step 57. The CPU 10 checks whether or not the above condition 5) is satisfied in steps 88 (FIG. 9), 37, 38, 50, 51, 52, 54, 55, and 56. -54-53-55-56 and then go to Step 57.
[0097]
  In step 57, the CPU 10 determines the headrest standard position PBs (thick left-downward oblique lines in FIG. 11) assigned to the seat front-rear position RPA (position register RPA data) at that time.
                PBs = 0.53 × RPA-33.9 (mm)
And calculate. Here, the unit of both PBs and RPA is mm. Then, a value obtained by adding the user's individual headrest vertical adjustment value PBa to the standard position PBs is calculated as the headrest target position PBo. When PBo <0 mm, it is updated as PBo = 0 mm, and when PBo> 72 mm, PBo is updated to 72 mm (59 to 62) and is given to the motor controller 9b of the driving device Bd to instruct the driving of the headrest to the target position PBo (63). The individual adjustment value PBa for each user is an individual adjustment amount registered in each posture data table 1 to 3 on the EEPROM 17 addressed to each switch SA1 to SA3. This is a value read from the attitude data table i corresponding to the ON switch SAi. When all the switches SA1 to SA3 are off, the adjustment value PBa is set to 0 (60).
[0098]
  Next, since the switch SBAf is on (other switches are off), the CPU 10 passes through the other controls ArP, BuP, BdP,... FrP, and steps 81-98 or 81-81 in FIGS. If the switch SBAf is kept on, the process proceeds from step 20 to 23 to 31 and to slide advance control (AfP). In this way, while the switch SBAf is kept on, the CPU 10 executes substantially only the slide advance control (AfP). When the switch SBAf returns from on to off, the driving of the seat in the forward direction is stopped (44).
[0099]
  3C. Slide backward control (ArP)
  If the switch SBAr for instructing the backward driving of the sheet is on during the “read state” (19), the CPU 10 drives the sheet backward by “sliding backward control” (ArP). The content of this control is the same as the content of the aforementioned “slide forward control” (AfP), although the driving direction is reversed.
[0100]
  3D. Headrest drive control (BuP)
  If the on-headrest drive instruction switch SBBu is on during “read status” (19), the CPU 10 executes on-headrest drive control (BuP) shown in FIGS. In this headrest upper drive control (BuP), control data ERB = 0 is written in the EEPROM 17 (68), the headrest 3 is driven upward (69), and a movement synchronization pulse is generated as the headrest is raised. Every time, the CPU 10 and the motor controller 9b update the position data RPB of the respective headrest vertical position register RPB (74). The contents of the position data update process are the same as those in the case of the slide forward / reverse control (AfP, ArP).
[0101]
  When the position detection switch B3 is switched from on to off during the headrest driving, the CPU 10 and the motor controller 9a rewrite the position data RPB of each position register RPB to PBref (70, 71). Then, the CPU 10 clears the register FIB and turns off the light emitting diode LDB (72, 73). When the electric motor B1 is overloaded (the motor current value flowing through the resistor rb is greater than or equal to the set value), the headrest upper drive is stopped, the position data RPB is rewritten to the upper limit position PBmax, the register FIB is cleared, and the light emitting diode is turned on. The LDB is turned off, and the data RPB of the position register RPB is written into the register EPB of the EEPROM 17 (65 to 67-75, 76). If the data in the register FIB is “0” (meaning that the data RPB is a value based on the detected value), the control data ERB = “1” (the motor is stopped: the data EPB in the register EPB is accurate) is stored in the EEPROM 17. (Meaning that the value is a negative value) (78). Also, when the headrest upper drive instruction switch SBBu returns from ON to OFF, the headrest upper drive is stopped (64-75).
[0102]
  In addition, when the headrest upper drive instruction switch SBBu returned from ON to OFF (the headrest upper drive was stopped), there was a drive of the headrest (manual adjustment). "1" indicating) is written to the register FHB (79). This “1” is then erased (updated to 0 indicating permission of automatic headrest adjustment) when the steps 37 and 38 shown in FIG. 6 are executed and the condition of step 52 or 54 is satisfied (YES).
[0103]
  3E. Headrest lower drive control (BdP)
  If the switch SBBd for instructing the headrest downward drive is ON in the “read state” (19), the CPU 10 drives the headrest downward by the headrest downward drive control (BdP). The content of this control is the same as the content of the above-mentioned “drive control on headrest” (BuP), although the drive direction is opposite.
[0104]
  3F. Upper drive control at the front of the seat base (CuP)
  The seat base is a cushion support frame integrated with the seat cushion 1, and the drive control of the seat cushion 1 is the same body as the seat cushion. If the switch SBCu instructing the upper drive of the front portion of the seat cushion 1 is on during the “read state” (19), the CPU 10 performs the seat base front upper drive control (CuP) to switch the seat cushion 1 Drive the front up. The content of this control is the same as the content of the above-mentioned “headrest upper drive control” (BuP). However, there is no processing corresponding to the processing in step 79.
[0105]
  3G. Lower drive control at the front of the seat base (CdP)
  If the switch SBCd for instructing the lower drive of the front portion of the seat cushion 1 is on during the “read state” (19), the CPU 10 controls the front of the seat cushion 1 under the seat base front lower drive control (CdP). Drive the part down. The content of this control is the same as the content of “upper drive control in front of the seat base” (CuP), but the drive direction is reversed.
[0106]
  3H. Upper drive control at the rear of the seat base (DuP)
  If the switch SBDu for instructing the upper drive of the rear portion of the seat cushion 1 is on during the “read state” (19), the CPU 10 controls the rear portion of the seat cushion 1 with the seat base rear upper drive control (DuP). Drive up. The content of this control is the same as the content of the above-mentioned “headrest upper drive control” (BuP). However, there is no processing corresponding to the processing in step 79.
[0107]
  3I. Lower drive control at the rear of the seat base (DdP)
  If the switch SBDd for instructing the lower drive of the rear portion of the seat cushion 1 is ON during the “read state” (19), the CPU 10 controls the rear portion of the seat cushion 1 with the seat base rear lower drive control (DdP). Drive down. The content of this control is the same as the content of “upper drive control at the rear of the seat base” (DuP), but the drive direction is reversed.
[0108]
  3J. Seatback forward rotation drive control (EfP)
  If the switch SBEf for instructing the forward rotation of the seat back 2 is ON during the “read state” (19), the CPU 10 controls the seat back 2 with the seat back forward rotational drive control (EfP). It is driven to rotate in the forward tilt direction. The contents of this control are the same as the contents of the aforementioned “headrest lower drive control” (BdP). However, there is no processing corresponding to the processing in step 79.
[0109]
  3K. Backward rotation drive control of seat back (ErP)
  If the switch SBEr for instructing the backward rotation of the seat back 2 is ON during the “read state” (19), the CPU 10 controls the seat back 2 by the seat back backward rotation drive control (ErP). It is rotationally driven in the rearward tilt direction. The contents of this control are the same as the contents of “upper drive control at the rear of the seat base” (DuP). However, there is no processing corresponding to the processing in step 79.
[0110]
  3L. Lumbar support protrusion rotation drive control (FfP)
  When the switch SBFf for instructing the lumbar support mounted on the seat back 2 to project toward the seated person and to rotate is turned on during the “read state” (19), the CPU 10 controls the lumbar projecting drive control ( The lumbar support is driven to rotate in the protruding direction by FfP). The contents of this control are the same as the contents of the aforementioned “headrest lower drive control” (BdP). However, there is no processing corresponding to the processing in step 79.
[0111]
  3M. Lumbar support retract rotation drive control (FrP)
  When the switch SBFr for instructing to rotate the lumbar support in the direction of retracting from the seated person at the time of “read status” (19) is on, the CPU 10 performs the lumbar-retreat drive control (FrP). The lumbar support is rotated in the retracting direction. The content of this control is the same as the content of the above-mentioned “headrest upper drive control” (BuP). However, there is no processing corresponding to the processing in step 79.
[0112]
  3N. Registration of seat posture
  If the switch SD for instructing registration of the sheet orientation is on at the “read status” (19), the CPU 10 refers to FIG. 9, and any one of the user-designated switches SA1 to SAi is turned on. It is checked whether it is on (81, 82), and when all the switches SA1 to SA3 are off, the seat posture is not registered. When the switch SAi (i = 1, 2, or 3) is on, the position data RPA to RPF of the position registers RPA to RPF are written to the registered position registers MRPAi to MRPFi of the attitude data table i on the EEPROM 17 ( 83) The appropriate headrest position PBs corresponding to the seat front / rear position data RPA at that time is calculated (84), and the individual headrest adjustment value PBa = RPB-PBs is calculated for each user i (switch SAi). The value PBa is written in the individual adjustment value register MPBai of the attitude data table i, and “1” indicating that the sheet attitude data addressed to the switch SAi (user i) is registered is registered in the register FSDi addressed to the switch SAi. (86). This individual adjustment value PBa is used for the seat posture addressed to the switch SAi (user i) in step 62 of FIG.
[0113]
  3O. Automatic posture setting
  If the switch SC for instructing automatic posture setting is ON during “read status” (19), referring to FIG. 9, the CPU 10 first designates prohibition of automatic headrest adjustment in the register FHB “1”. "Is written (87, 88). This “1” is deleted when the seat ECU changes from the “standby state” to the “active state” and at step 53 in FIG. Next, the CPU 10 checks whether any of the user-designated switches SA1 to SAi is on (89), and when all the switches SA1 to SA3 are off, the CPU 10 stores the standard sheet posture data table 0 in the ROM 11. Then, each position data of each standard position register MRPA0 to MRPF0 is read out and used as target position data for each mechanism A to F, and given to the motor controller of each mechanism drive unit Ad to Fd to instruct driving to that position (91 ). Thus, when all the switches SA1 to SA3 are turned off and an automatic posture setting is instructed, the standard sheet posture stored in the ROM 11 is automatically set.
[0114]
  When any of the switches SAi (i = 1, 2 or 3) is on, the data in the register FSDi is checked, and if it is “1” (the seat orientation is registered), the seat orientation of the EEPROM 17 The position data of each position register MRPAi to MRPFi in the data table i is read out and used as target position data for each mechanism A to F, and given to the motor controller of each mechanism drive unit Ad to Fd, and the drive to that position is instructed. (90). As a result, when any of the switches SA1 to SAi is turned on to instruct automatic posture setting, the sheet posture stored in the EEPROM 17 is automatically set. When the data in the register FSDi is checked and it is “0” (no sheet orientation registration), data reading from the EEPROM 17 is not performed, and the seat orientation is not automatically set. That is, turning on the switch SC (instruction for automatic posture setting) is ignored.
[0115]
  3P. Canceling automatic headrest adjustment prohibition
  In step HCO in FIG. 9, it is checked whether both data in registers FIA and FIB are 0 (both position data RPA and RPB correctly indicate the current position). If so, the following automatic headrest adjustment is prohibited. Proceed to release and execute automatic adjustment.
[0116]
  Reference is first made to FIG. The CPU 10 monitors on / off of the driver seat door switch SF (92 to 95), and when it shows a change corresponding to the change from the closing of the driver seat door to the opening, the driver (seater) Since there is a possibility that the seat posture is changed, the register FHB is cleared (96). That is, the data in the register FHB is set to 0 which means that headrest automatic adjustment is possible (permitted).
[0117]
  3Q. Automatic adjustment enable / disable switch SE from off (no) to on (possible)
        Automatic adjustment of headrest for switching response
  The CPU 10 monitors the switching of the switch SE for designating permission / prohibition of headrest automatic adjustment from off (prohibition instruction) to on (permission instruction) (97 to 90). Proceeding from step 90 to step 57 in FIG. 7, the headrest drive to the appropriate position PBo associated with the seat front-rear position RPA in steps 57 to 63 is performed.
[0118]
  3R. When the seat back 2 rises to an angle less than the reference angle PFref
        Automatic headrest adjustment
  Even when the switch SE that designates whether or not the headrest automatic adjustment is permitted is on (automatic adjustment permission designation), while the seat back 2 is at an angle exceeding the reference angle PFref (for example, the seat back 2 is parallel to the floor surface). The CPU 10 recognizes this in step 55 of FIG. 7 and does not execute the headrest automatic adjustment. If there is no obstacle to the movement of the headrest below the reference angle PFref, the CPU 10 checks whether the seat back 2 has risen below the reference angle PFref in steps 101 to 104 in FIG. Then, the process proceeds from step 104 to step 57 in FIG. 7, and the headrest drive is performed to the appropriate position PBo associated with the seat front-rear position RPA in steps 57-63.
[0119]
  3S. Automatic headrest adjustment when switching from no seated to present
  Even when the switch SE for designating permission / prohibition of headrest automatic adjustment is ON (automatic adjustment permission designation) and there is no seated person (the seated person sensor SG is off), this is recognized in step 58 of FIG. Does not perform automatic headrest adjustment. Therefore, the CPU 10 checks in steps 105 to 108 in FIG. 10 whether or not there is a seated person (SG is off) to a seated person (SG is on). Then, the process proceeds to Step 57 of Step 7, and the headrest drive to the appropriate position PBo associated with the seat front-rear position RPA in Steps 57 to 63 is performed.
[0120]
  3T. When the position data RPA and RPB are both set to an accurate value according to the detected value
        Automatic headrest adjustment
  If at least one of the data in registers FIA and FIB is 1 (RPA or RPB is inaccurate), the headrest automatic adjustment is suspended, but the data in registers FIA and FIB are both 0 (both RPA and RPB are accurate). When switched, the CPU 10 recognizes this at step 109, proceeds to step 57 in FIG. 7, and performs headrest driving to the appropriate position PBo associated with the seat front-rear position RPA at steps 57-63.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an outline of a mechanism according to an embodiment of the present invention.
FIG. 2 is a block diagram showing a configuration of a seat ECU coupled to mechanisms A to E shown in FIG.
FIG. 3 is a flowchart showing a part of an outline of a control function of CPU 10 shown in FIG. 2;
4 is a flowchart showing another part of the outline of the control function of CPU 10 shown in FIG. 2; FIG.
FIG. 5 is a flowchart showing another part of the outline of the control function of the CPU 10 shown in FIG. 2;
6 is a flowchart showing another part of the outline of the control function of the CPU 10 shown in FIG. 2;
7 is a flowchart showing another part of the outline of the control function of the CPU 10 shown in FIG. 2;
FIG. 8 is a flowchart showing another part of the outline of the control function of CPU 10 shown in FIG. 2;
FIG. 9 is a flowchart showing another part of the outline of the control function of CPU 10 shown in FIG. 2;
10 is a flowchart showing the remainder of the overview of the control functions of the CPU 10 shown in FIG.
FIG. 11 shows the seat position and headrest height region classifications, and region-corresponding position detection switches A3 and B3, with the front and rear positions of the seat shown in FIG. 1 as the horizontal axis and the height of the headrest as the vertical axis. It is a graph which shows on / off, and the thick solid line which goes down to the left shows the appropriate headrest height corresponding to a seat position.
[Explanation of symbols]
1: Seat cushion
2: Seat back
3: Headrest
A to F: Electric drive mechanism
A1, B1: Electric motor
A2, B2: Rotary encoder
A3, B3: Position detection switch
Ad to Fd: Mechanism driving device
ra, rb: resistors
SPS: Power switch for electric seat
BAT: Vehicle battery
SA: Switch group for users
SB: Manual instruction switch group
SC: Automatic posture setting instruction switch
SD: Posture registration instruction switch
SE: Headrest automatic adjustment instruction switch
SF: Door switch for driver's seat
SG: Seated sensor
LD: group of light emitting diodes

Claims (8)

An electric drive mechanism A that drives the seat in the front-rear direction as seen from the seated person;
A front-rear position detecting means for detecting the seat position in the front-rear direction;
An electric drive mechanism B that is mechanically separated from the electric drive mechanism A and independently drives the headrest of the seat up and down;
Headrest position detecting means for detecting the vertical position of the headrest;
It means to enter a drive instruction;
In response to a drive instruction from the input means to control at least one of the electric drive mechanism A or B, the longitudinal position detecting means detects the front-rear direction corresponding to the sheet positions vertically positioned photoelectric kinematic driving mechanism control means via the B performs headrest automatic adjustment, which drives the head restraint; and,
When said control means is driven according to the headrest driving instruction by the input means, the headrest automatic adjustment by the control means, means for inhibiting;
Ru equipped with a power dynamic sheet. An electric drive mechanism A that drives the seat in the front-rear direction as seen from the seated person;
A front-rear position detecting means for detecting the seat position in the front-rear direction;
An electric drive mechanism B that is mechanically separated from the electric drive mechanism A and independently drives the headrest of the seat up and down;
Headrest position detecting means for detecting the vertical position of the headrest;
Driving instructions, means to input an instruction, the automatic setting of the registration instruction and the registered position;
In response to a drive instruction from the input means to control at least one of the electric drive mechanism A or B, the longitudinal position detecting means conductive kinematic driving mechanism vertical position associated with the front-rear direction of the seat position detected is B performs headrest automatic adjustment, to drive the head restraint through, in response to the registration instruction to register the vertical position of the front and rear direction of the seat position and the headrest at that time in the memory, the automatic setting instructions to the registration position driving the sheet and the headrest in a position registered in the memory in response to the control means; and,
Means for inhibiting the automatic adjustment of the headrest by the control means when the control means drives the seat and the headrest to the position registered in the memory in response to an instruction for automatic setting to the registration position;
Ru equipped with a power dynamic sheet.   The prohibiting unit cancels the prohibition of the automatic headrest adjustment when the control unit drives the seat in the front-rear direction larger than a set value or more than a set time while prohibiting the automatic headrest adjustment. The electric seat according to claim 1 or 2. An electric drive mechanism A that drives the seat in the front-rear direction as seen from the seated person;
A front-rear position detecting means for detecting the seat position in the front-rear direction;
An electric drive mechanism B that is mechanically separated from the electric drive mechanism A and independently drives the headrest of the seat up and down;
Headrest position detecting means for detecting the vertical position of the headrest;
It means to enter a drive instruction;
In response to a drive instruction from the input means to control at least one of the electric drive mechanism A or B, the longitudinal position detecting means detects the front-rear direction corresponding to the sheet positions vertically positioned photoelectric kinematic driving mechanism headrest automatic adjustment for driving the head restraint through a B, performs the control means; and,
Means for detecting the opening and closing of a door that is opened and closed when exiting therefrom sitting on the seat, in the state indicating the closed door, when the control means is driven according to the headrest driving instruction by the input means, It means the headrest automatic adjustment by the control means, is prohibited;
Ru with a power seat mounted on the vehicle. An electric drive mechanism A that drives the seat in the front-rear direction as seen from the seated person;
A front-rear position detecting means for detecting the seat position in the front-rear direction;
An electric drive mechanism B that is mechanically separated from the electric drive mechanism A and independently drives the headrest of the seat up and down;
Headrest position detecting means for detecting the vertical position of the headrest;
An electric drive mechanism E for rotationally driving the seat back of the seat in the front-rear direction;
Seat back angle detecting means for detecting the rotation angle of the seat back;
It means to enter a drive instruction;
Input means in response to a drive instruction from the electric drive mechanism A, B, and controls at least one of E, electrostatic movement in the vertical position associated with the seat position in the longitudinal direction in which the front and rear position detecting means has detected performing headrest automatic adjustment, to drive the headrest via a drive mechanism B, the control unit; and
Means for inhibiting the automatic adjustment of the headrest by the control means when the rotation angle of the seat back represents a backward inclination greater than a set inclination value of the seat back;
Ru equipped with a power dynamic sheet. An electric drive mechanism A that drives the seat in the front-rear direction as seen from the seated person;
A front-rear position detecting means for detecting the seat position in the front-rear direction;
An electric drive mechanism B that is mechanically separated from the electric drive mechanism A and independently drives the headrest of the seat up and down;
Headrest position detecting means for detecting the vertical position of the headrest;
It means to enter a drive instruction;
In response to a drive instruction from the input means to control at least one of the electric drive mechanism A or B, the longitudinal position detecting means detects the front-rear direction corresponding to the sheet positions vertically positioned photoelectric kinematic driving mechanism headrest automatic adjustment for driving the head restraint through a B, performs the control means; and,
Means for designating permission / prohibition of the automatic headrest adjustment;
The control means performs the headrest automatic adjustment when permission is designated by the designation means, and when the prohibition is designated, the control means suspends execution of the headrest automatic adjustment;
Electric seat. An electric drive mechanism A that drives the seat in the front-rear direction as seen from the seated person;
A front-rear position detecting means for detecting the seat position in the front-rear direction;
An electric drive mechanism B that is mechanically separated from the electric drive mechanism A and independently drives the headrest of the seat up and down;
Headrest position detecting means for detecting the vertical position of the headrest;
It means to enter a drive instruction;
In response to a drive instruction from the input means to control at least one of the electric drive mechanism A or B, the longitudinal position detecting means detects the front-rear direction corresponding to the sheet positions vertically positioned photoelectric kinematic driving mechanism headrest automatic adjustment for driving the head restraint through a B, performs the control means; and,
Comprising a; seating sensor for detecting whether the occupant is present on the sheet
The control means performs the headrest automatic adjustment when the seating sensor detects a seated person, and holds the headrest automatic adjustment when the seated person is not detected;
Electric seat. Electric sheet, when the power is turned off nonvolatile memory means that holds the vertical position of the headrest; wherein the control means, the information at the time of start of driving of the electric drive mechanism B representing the in driving, stop at the end information representing a medium, writing in the nonvolatile memory means, when it from the non-volatile memory means immediately after the switching of oN from the power oFF reads the information is representative of the being driven, the electric drive mechanism B The electric seat according to any one of claims 1 to 7, wherein the headrest is driven to a limit position and the vertical position of the headrest is updated to the limit position .

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