JP3609960B2 - Self-correcting clock - Google Patents

Description

【００３１】
次にうるう秒は表２に示される如く、ＬＳ１、ＬＳ２の２ビットを使用し、ＬＳ１＝ＬＳ２＝０では「１ヶ月以内にうるう秒の補正を行わない」、ＬＳ１＝１・ＬＳ２＝０では「１ヶ月以内に負のうるう秒（削除）あり」つまり１分間が５９秒となり、ＬＳ１＝ＬＳ２＝１では「１ヶ月以内に正のうるう秒（挿入）あり」つまり１分間が６１秒となるような情報形態となっている。うるう秒の補正のタイミングは既に決められており、ＵＴＣ時刻の１月１日もしくは７月１日の直前に行われることになっている。よって、日本時間（ＪＴＣ）では１月１日もしくは７月１日午前９：００直前に行われることになる。
【００３２】
【表２】

【００３３】
停波情報は表３の（ａ）、（ｂ）、（ｃ）に示される如く、ＳＴ１、ＳＴ２、ＳＴ３、ＳＴ４、ＳＴ５、ＳＴ６を使用し、ＳＴ１・ＳＴ２・ＳＴ３で停波開始予告、ＳＴ４で停波時間帯予告、ＳＴ５・ＳＴ６で停波期間予告の停波情報を提供する。まず停波開始予告について説明すると、ＳＴ１＝ＳＴ２＝ＳＴ３＝０では「停波予定無し」、ＳＴ１＝ＳＴ２＝０・ＳＴ３＝１では「７日以内に停波」、ＳＴ１＝０・ＳＴ２＝１・ＳＴ３＝０では「３から６日以内に停波」、ＳＴ１＝０・ＳＴ２＝ＳＴ３＝１では「２日以内に停波」、ＳＴ１＝１・ＳＴ２＝ＳＴ３＝０では「２４時間以内に停波」、ＳＴ１＝１・ＳＴ２＝０・ＳＴ３＝１では「１２時間以内に停波」、ＳＴ１＝ＳＴ２＝１・ＳＴ３＝０では「２時間以内に停波」となっている。次に停波時間帯予告は、ＳＴ４＝１では「昼間のみ」、ＳＴ４＝０では「終日、または停波予定無し」である。次に停波期間予告は、ＳＴ５＝ＳＴ６＝０では「停波予定無し」、ＳＴ５＝０・ＳＴ６＝１では「７日以上停波、または期間不明」、ＳＴ５＝１・ＳＴ６＝０では「２から６日以内で停波。ＳＴ５＝ＳＴ６＝１では「２日未満で停波」となっている。
【００３４】
【表３】

【００３５】
以上、郵政省通信総合研究所（ＣＲＬ）が運用管理している長波の標準時刻情報を含む電波による送信情報について詳述した如く、標準時刻情報以外に予備ビットによる情報、うるう秒情報、停波情報も送信情報に含まれる。
【００３６】
リセット／強制受信スイッチ１２は、制御回路１４の各種状態を初期状態に戻すときにオンにされる。
このリセット／強制受信スイッチ１２がオンされたとき、または図示しない電池をセットしたときに本電波修正時計は、標準時刻電波信号を強制的に受信して修正を行う修正モード（強制修正モード）になる。
【００３７】
発振回路１３は、水晶発振器ＣＲＹおよびキャパシタＣ_２ ，Ｃ_３ により構成され、所定周波数の基本クロックを制御回路１４に供給する。
【００３８】
制御回路１４は、図示しない分針カウンタ、秒針カウンタ、標準分・秒カウンタ等を有しおり、初期修正モード時には、標準電波信号受信系１１によるパルス信号Ｓ１１を受けて、受信した標準電波信号の受信状態があらかじめ決められた基準範囲と比較し、受信状態が基準範囲内にある場合には、制御信号ＣＴＬ_１，ＣＴＬ_２ をバッファ１７を介して秒針用のステッピングモータ１２１および時分針用のステッピングモータ１３１に出力等して指針位置の初期設定、すなわち帰零動作を行わせ、受信状態が基準範囲内にない場合には、制御信号ＣＴＬ_１，ＣＴＬ_２ を出力せずに、ドライブ信号ＤＲ_１ をドライブ回路１５に出力して、報知手段としての発光素子１６を発光させてユーザーに電波受信がほとんどできない旨を報知させる。
また、受信状態が基準範囲内にある場合に帰零動作を行わせた後、受信した電波信号をデコードし、デコードの結果、時刻化が可能である場合には、発振回路１３による基本クロックに基づいて各種カウンタのカウント制御並びに光検出センサによる検出信号ＤＴ_１ の入力レベルに応じて、制御信号ＣＴＬ_１，ＣＴＬ_２ をバッファ１７を介して秒針用のステッピングモータ１２１および時分針用のステッピングモータ１３１に出力して回転制御を行うことにより時刻修正制御を行う。
一方、デコードの結果、時刻化が不可能である場合には、制御信号ＣＴＬ_１，ＣＴＬ_２ を出力せずに、ドライブ信号ＤＲ_１ をドライブ回路１５に出力して、報知手段としての発光素子１６を発光させてユーザーに電波受信が良好でない旨を報知させる。
これにより、初期修正モードの動作を完了させる。
【００３９】
また、制御回路１４は、初期修正モードの動作を完了させた後、通常修正モードの制御を行う。
通常修正モードにおいては、初期修正モード時の帰零動作後と同様の動作を行う。
具体的には、受信した電波信号をデコードし、デコードの結果、時刻化が可能である場合には、発振回路１３による基本クロックに基づいて各種カウンタのカウント制御並びに光検出センサ１４０による検出信号ＤＴ_１ の入力レベルに応じて、制御信号ＣＴＬ_１，ＣＴＬ_２ をバッファ１７を介して秒針用のステッピングモータ１２１および時分針用のステッピングモータ１３１に出力して回転制御を行うことにより時刻修正制御を行う。
一方、デコードの結果、時刻化が不可能である場合には、制御信号ＣＴＬ_１，ＣＴＬ_２ を出力せずに、ドライブ信号ＤＲ_１ をドライブ回路１５に出力して、報知手段としての発光ダイオード１６を発光させてユーザーに電波受信が良好でない旨を報知させる。
【００４０】
なお、上記の説明では、受信状態が基準範囲外にあると判別するときは、電波が弱かったり、ノイズが多いときである。
電波が非常に弱い場合には、図５（ｃ）に示すように、数個の信号分、ローレベル（Ｌ）かハイレベル（Ｈ）のままになる。
また、ノイズが多いときは、時刻電波と無関係にレベルが変化する。
これらの状態にある信号Ｓ１１を、たとえば１０秒に２回あるいはそれ以上受けたときには、受信状態が基準範囲外にあると判別する。
具体的には、たとえば１０秒程度を検出時間として、時間内においてレベルの変化が１秒以内に検出されなかったときおよび検出したパルス幅が０．８、０．５、０．２秒近辺でなかったときをＮＧとして、ＮＧが２回以上発生したときには受信不可と判断する。
【００４１】
また、制御回路１４は、あらかじめ設定した時刻または強制的に標準時刻電波信号を受信して時刻修正を行う場合には、上述したように、時刻のアナログ表示機能を持つ指針の位置修正を行うとともに、デジタル表示機能を持つ液晶表示パネル３０における表示制御を行う。
具体的には、制御回路１４は、デジタル表示制御を行うに際して、初期の指針位置検出中は、特定の初期値、たとえば「０：００」を表示させ、位置検出後と受信中は指針停止位置の時刻を表示させ、受信完了時は受信したデータを表示させ、指針は早送り修正を行わせる。
また、受信中または通常動作時は、修正用スイッチ群によるボタン修正の割り込みを受け付け、時刻修正時に、アップスイッチ２３、またはダウンスイッチ２４を操作した瞬間（たとえ押しボタンの場合、押した瞬間）に、制御信号ＣＴＬ_１ ，ＣＴＬ_２ の出力を停止して指針をその位置で停止させ、停止時刻を表示させる。
デジタル表示で時刻修正を行い修正モードを解除すると、指針を早送りさせてデジタル表示に追従させる。
なお、制御回路１４は、ボタン修正後の指針早送り中（追従時）は、再度ボタン修正を受け付ける。
【００４２】
ドライブ回路１５はｐｎｐ型トランジスタＱ１および抵抗素子Ｒ₁ ，Ｒ₂ により構成されている。
トランジスタＱ１のベースが抵抗素子Ｒ₁ を介して制御回路１４のドライブ信号ＤＲ₁
の出力ラインに接続され、コレクタが抵抗素子Ｒ₂ を介して発光ダイオードからなる発光素子１６のアノードに接続され、エミッタが電源電圧Ｖ_CCの供給ラインに接続されている。そして、発光素子１６のカソードが接地されている。
すなわち、発光素子１６は、制御回路１４からローレベルのドライブ信号ＤＲ₁ が出力されたときに発光するようにドライブ回路１５に接続されている。
【００４３】
また、ドライブ回路１８は、ｐｎｐ型トランジスタＱ２、および抵抗素子Ｒ_３ ，Ｒ_４ により構成されている。
【００４４】
修正用スイッチ群２０は、液晶表示パネル３０のデジタル表示を修正するための修正モードスイッチ２１、表示切換スイッチ２２、アップスイッチ（ＵＰ）２３、およびダウンスイッチ（ＤＮ）２４が制御回路１４の４つの入力端子に対して並列に接続されている。
修正モードスイッチ２１がオンされると、制御回路１４は、後で詳述するボタン修正モードに移行する。
なお、制御回路１４は、標準電波信号の受信中または通常動作時に、この修正モードスイッチ２１の受け付けて、ボタン修正モードに移行する。
アップスイッチ２３、またはダウンスイッチ２４はたとえば押しボタンスイッチであり、デジタル表示時刻の修正時に、これらのスイッチが押された瞬間に制御回路１４は、制御信号ＣＴＬ_１ ，ＣＴＬ_２ の出力を停止させて、停止時刻を液晶表示パネル３０に表示させる。
そして、制御回路１４は、デジタル表示で時刻修正を行い、修正モードを解除すると、指針を早送りデジタル表示に追従させる。
【００４５】
時計本体１００は、互いに対向して接続されて輪郭を形成する第２ケースとしての下ケース１１１および第１ケースとしての上ケース１１２と、この下ケース１１１および上ケース１１２で形成される空間内のほぼ中央部において下ケース１１１と連結した状態で配置される中板１１３とを備えており、空間内の下ケース１１１、中板１１３、上ケース１１２の所定の位置に対して、第１駆動系１２０、第２駆動系１３０、光検出センサ１４０、手動修正系１５０等が固定あるいは軸支されている。
【００４６】
第１駆動系１２０は、図２、図３および図７に示すように、略コ字状のステータ１２１ａ、このステータ１２１ａの一方側の脚片に巻回された駆動コイル１２１ｂ、このステータ１２１ａの他方の磁極間において回動自在に配置されたロータ１２１ｃにより構成された秒針用ステッピングモータ１２１と、ロータ１２１ｃのピニオン１２１ｃ’に大径歯車１２２ａが噛合した第１伝達歯車（第１検出用歯車）としての第１の５番車１２２と、この第１の５番車１２２の小径歯車１２２ｂに噛合した第２検出用歯車（第１指針車）としての秒針車１２３とにより構成されている。
ここで、秒針用ステッピングモータ１２１は、ステータ１２１ａが中板１１３に載置して固定され、ロータ１２１ｃが中板１１３と上ケース１２とに軸支されており、制御回路１４の出力制御信号ＣＴＬ_１ に基づいて、その回転方向、回転角度および回転速度が制御される。
【００４７】
第１の５番車１２２は、大径歯車１２２ａの歯数が６０個、小径歯車１２２ｂの歯数が１５個に形成され、下ケース１１１および上ケース１１２に回動自在に軸支され、その大径歯車１２２ａが秒針用ステッピングモータ１２１のロータ１２１ｃ（ピニオン１２１ｃ’）と噛合して、ロータ１２１ｃの回転速度を所定速度に減速させる。この第１の５番車１２２には、図９および図１１に示すように、秒針車１２３と重なる領域において周方向に等間隔（中心角α１が１２０°）で配置された３個の円形状をなす透孔１２２ｃが形成されている。この透孔１２２ｃは、光検出センサ１４０の検出光を通過させるだけでなく、少なくともその１つは、第１の５番車１２２を組付ける際の位置決め孔（度決め孔）として用いられるものである。
【００４８】
秒針車１２３は、大径歯車１２３ａの歯数が６０個に形成され、その軸部の一端が上ケース１１２に軸支され、中板１１３を下ケース１１１側に貫通したその他端側には秒針軸１２３ｂが圧入されており、この秒針軸１２３ｂは、後述する分針パイプ１３４ｐの内部に挿通されて、その先端に秒針２０２が取り付けられている。この秒針車１２３には、図１０に示すように、回転により第１の５番車１２２と重なる領域において周方向に等間隔（中心角α２が３０°）で配置された１１個の円形状をなす透孔１２３ｃと、一箇所だけピッチの異なる位置決め遮光部１２３ｄ（透孔１２３ｃと透孔１２３ｃとの中心角が６０°）とが形成されている。そして、上記第１の５番車１２２の透孔１２２ｃが位置決め遮光部１２３ｄに対向した後に最初に透孔１２３ｃと対向する時に、秒針が正時を指すように構成されている。
【００４９】
透孔１２３ｃは、光検出センサ１４０の検出光を通過させるだけでなく、少なくともその１つは、秒針車１２３を組付ける際の位置決め孔（度決め孔）として用いられるものである。
また、これらの透孔１２３ｃの内側には、周方向に長尺で回転軸方向に突出する円弧状の付勢ばね１２３ｅが、切り欠き孔１２３ｆにより画定されている。この円弧状付勢ばね１２３ｅは、秒針車１２３をその回転軸方向に付勢するものである。
【００５０】
ここで、位置決め遮光部１２３ｄは、周方向において切り欠き孔１２３ｆから離れた位置、すなわち、２つの切り欠き孔１２３ｆが途切れて離れた領域に形成されている。したがって、切り欠き孔１２３ｆと位置決め遮光部１２３ｅとの距離を十分確保できるため、位置決め遮光部１２３ｄの領域において検出光が切り欠き孔１２３ｆに回り込むようなことはなく、確実にこの位置決め遮光部１２３ｄで検出光を遮ることができる。すなわち、検出光の回り込みによる誤検出を生じ易い切り欠き孔１２３ｆを設けた領域から離れた位置に位置決め遮光部１２３ｄが形成されていることから、この位置決め遮光部１２３ｄを、秒針車１２２の回転角度位置の位置決めに用いることで、確実な位置決めを行なうことができる。
【００５１】
秒針車１２２においては、図１０に示すように、複数（１１個）の透孔１２３ｃを設ける代わりに、図１１に示すように、位置決め遮光部１２３ｄと径方向において対向する位置にある透孔１２３ｃのみを残して、その他の透孔１２３ｃをそれぞれ切り欠き孔１２３ｇと一体的に開けてもよい。これによれば、検出光の通過を許容する部分において、検出光の通過をより一層確実なものとし、また、秒針車１２２を形成する材料の無駄を低減することができる。
【００５２】
第２駆動系１３０は、図２、図３、および図８に示すように、略コ字状のステータ１３１ａ、このステータ１３１ａの一方側の脚片に巻回された駆動コイル１３１ｂ、このステータ１３１ａの他方の磁極間において回動自在に配置されたロータ１３１ｃにより構成された時分針用ステッピングモータ１３１と、ロータ１３１ｃのピニオン１３１ｃ’に大径歯車１３２ａが噛合した中間歯車としての第２の５番車１３２と、この第２の５番車１３２の小径歯車１３２ｂに大径歯車１３３ａが噛合した第２伝達歯車（第３検出用歯車）としての３番車１３３と、この３番車１３３の小径歯車１３３ｂに大径歯車１３４ａが噛合した第４検出用歯車（第２指針車）としての分針車１３４と、この分針車１３４の小径歯車１３４ｂに大径歯車１３５ａが噛合した中間歯車としての日の裏車１３５と、この日の裏車１３５の小径歯車１３５ｂに噛合した第５検出用歯車（第２指針車）としての時針車１３６とにより構成されている。
ここで、時分針用ステッピングモータ１３１は、ステータ１３１ａが中板１１３に載置して固定され、ロータ１３１ｃが中板１１３と上ケース１１２とに軸支されており、制御回路の出力制御信号に基づいて、その回転方向、回転角度および回転速度が制御される。
【００５３】
第２の５番車１３２は、大径歯車１３２ａの歯数が６０個、小径歯車１３２ｂの歯数が１５個に形成され、中板１１３および上ケース１１２に軸支され、その大径歯車１３２ａが時分針用ステッピングモータ１３１のロータ１３１ｃ（ピニオン１３１ｃ’）と噛合して、ロータ１３１ｃの回転速度を所定速度に減速させる。なお、この第２の５番車１３２としては、前述の第１の５番車１２２を流用、すなわち、透孔１２２ｃが設けられたものを用いてもよい。これにより、部品の共用化が行なえ製品のコストを低減することができる。
【００５４】
３番車１３３は、大径歯車１３３ａの歯数が６０個、小径歯車１３３ｂの歯数が１０個に形成され、軸部の一端が上ケース１１２に軸支され、他端側が中板１１３を貫通した状態で回動自在に配設されており、第２の５番車１３２の回転を減速して分針車１３４に伝達する。また、３番車１３３には、図１０に示すように、回転により秒針車１２３および第１の５番車１２２と重なる領域において周方向に等間隔（中心角α３が３６°）で配置された１０個の円形状をなす透孔１３３ｃが形成されている。この透孔１３３ｃは、光検出センサ１４０の検出光を通過させるだけでなく、少なくともその１つは、３番車１３３を組付ける際の位置決め孔（度決め孔）として用いられるものである。
【００５５】
分針車１３４は、大径歯車１３４ａの歯数が６０個、小径歯車１３４ｂの歯数が１４個に形成され、その中央部には小径歯車１３４ｂが一体的に形成された分針パイプ１３４ｐが、側面視にて略Ｔ字形状をなすように形成されている。そして、分針パイプ１３４ｐの一端部が中板１３に回動自在に軸支され、他端側の軸部は後述する時針車１３６の時針パイプ１３６ｐの内部に回動自在に挿通されいる。また、分針１パイプ３４ｐは、下ケース１１１を貫通して時計の文字板２０１側に突出しており、その先端には分針２０３が取り付けられている。
【００５６】
また、分針車１３４には、図１３に示すように、回転により秒針車１２３，第１の５番車１２２，３番車１３３と重なる領域において周方向に長尺な３個の円弧状透孔１３４ｃ，１３４ｄ，１３４ｅが形成されている。これら円弧状透孔１３４ｃと円弧状透孔１３４ｄとは、中心角α５で３０°隔てて形成され、円弧状透孔１３４ｄと円弧状透孔１３４ｅとは、中心角α６で３０°隔てて形成され、また、円弧状透孔１３４ｅと円弧状透孔１３４ｃとは、中心角α７で６０°隔てて形成されている。すなわち、円弧状透孔１３４ｅと円弧状透孔１３４ｃとの間に、最も幅の広い遮光部Ａが形成され、円弧状透孔１３４ｃと円弧状透孔１３４ｄとの間および円弧状透孔１３４ｄと円弧状透孔１３４ｅとの間に、上記遮光部Ａよりも幅狭の遮光部Ｂが形成されている。
【００５７】
また、円弧状透孔１３４ｃは、一端側の円形部１３４ｃ’と、他端側から伸びる幅広円弧部１３４ｃ’’と、両者を連結する幅狭円弧部１３４ｃ’’’とにより形成されている。この幅狭円弧部１３４ｃ’’’により画定される円形部１３４ｃ’は、検出光を通過させるだけでなく、分針車１３４を組み付ける際の位置決め孔（度決め孔）として用いられるものである。
【００５８】
時針車１３６は、大径歯車１３６ａの歯数が４０個に形成され、その中央部に円筒状の時針パイプ１３６ｐが一体的に取り付けられており、この時針パイプ１３６ｐの内部に前述の分針パイプ１３４ｐが挿通されている。そして、時針パイプ１３６ｐは、下ケース１１に形成された軸受け孔１１１ａに挿通されて回動自在に軸支されており、また、その先端側は下ケース１１１を貫通して時計の文字板２０１側に突出しており、その先端には時針２０４が取り付けられている。
【００５９】
また、時針車１３６には、図１４に示すように、回転により秒針車１２３，第１の５番車１２２，３番車１３３，分針車１３４と重なる領域において周方向に長尺な３個の円弧状透孔１３６ｃ，１３６ｄ，１３６ｅが形成されている。これら円弧状透孔１３６ｃと円弧状透孔１３６ｄとは、中心角α８で４５°隔てて形成され、円弧状透孔１３６ｄと円弧状透孔１３６ｅとは、中心角α９で６０°隔てて形成され、また、円弧状透孔１３６ｅと円弧状透孔１３６ｃとは、中心角α１０で３０°隔てて形成されており、さらに、円弧状透孔１３６ｃ，１３６ｄ，１３６ｅの長さは、中心角β１＋β２，β３，β４がそれぞれ７５°，６０°，９０°となるように設定されている。すなわち、円弧状透孔３６ｅと円弧状透孔１３６ｃとの間に、最も幅の狭い遮光部Ｃが形成され、円弧状透孔１３６ｃと円弧状透孔１３６ｄとの間に、遮光部Ｃよりも幅の広い遮光部Ｄが形成され、円弧状透孔１３６ｄと円弧状透孔１３６ｅとの間に、遮光部Ｄよりも幅の広い遮光部Ｅが形成されている。
【００６０】
また、円弧状透孔１３６ｃは、一端側から中心角β１で７．５°のところに位置する円形部１３６ｃ’と、他端側から伸びる幅広円弧部１３６ｃ’’と、両者を連結すると共に円形部１３６ｃ’の両側に位置する幅狭円弧部１３６ｃ’’’とにより形成されている。この幅狭円弧部１３６ｃ’’’により画定される円形部１３６ｃ’は、検出光を通過させるだけでなく、時針車１３６を組み付ける際の位置決め孔（度決め孔）として用いられるものである。
【００６１】
日の裏車１３５は、大径歯車１３５ａの歯数が４２個、小径歯車１３５ｂの歯数が１０個に形成され、下ケース１１１に形成された突部１１１ｂに対して回動自在に軸支されており、大径歯車１３５ａが分針パイプ１３４ｐに形成された小径歯車１３４ｂに噛合し、また、小径歯車１３５ｂが時針車１３６（１３６ａ）に噛合して、分針車１３４の回転を減速して時針車１３６に伝達する。
【００６２】
光検出センサ１４０は、図２に示すように、上ケース１２の壁面に固定された回路基板１４１に取付けられた発光ダイオードからなる発光素子１４２と、この発光素子１４２に対向するように、下ケース１１１の壁面に固定された回路基板１４３に取付けられたフォトトランジスタからなる受光素子１４４とにより形成されている。
そして、発光素子１４２のアノードは一端がｐｎｐトランジスタＱ_２ のコレクタに接続されたドライブ回路１８における抵抗素子Ｒ_４ の他端に接続され、カソードは、接地されるとともに、受光素子１４４のエミッタに接続されている。
受光素子１４４のコレクタは、制御回路１４に接続されている。この制御回路との接続ラインは、検出信号ＤＴ_１ の制御回路１４への出力ラインとなっており、この出力ラインは、抵抗素子Ｒ_５ を介して電源電圧Ｖ_ＣＣの供給ラインに接続されている。
ドライブ回路１８のトランジスタＱ_２ のエミッタは電源電圧Ｖ_ＣＣの供給ラインに接続され、ベースは抵抗素子Ｒ_３ を介してドライブ信号ＤＲ_２ の出力ラインに接続されている。
すなわち、発光素子１４２は、制御回路１４からローレベルのドライブ信号ＤＲ_２ が出力されたとき発光するようにドライブ回路１８に接続されている。
【００６３】
また、図３に示すように、平面視にて第１の５番車１２２、秒針車１２３、３番車１３３、分針車１３４、時針車１３６の全てが同時に重なる位置に配置されている。そして、第１の５番車１２２の透孔１２２ｃ、３番車１３３の透孔１３３ｃ、秒針車１２３の透孔１２３ｃ、分針車の透孔１３４ｃ（１３４ｄ、１３４ｅ）、時針車１３６の透孔１３６ｃ（１３６ｄ、１３６ｅ）が重なり合った時に、発光素子１４２から発せられた検出光が受光素子１４４により受光されて、秒針、分針、時針が正時等の位置を指していることを出力するようになっている。
【００６４】
さらに、発光素子１４２は、上ケース１１２の外側に開口するように形成された第１配置部としての取付け凹部１１２ｃ内に配置されており、この取付け凹部１１２ｃの底面には、所定径の円形貫通孔１１２ｄが開けられている。この円形貫通孔１１２ｄは、発光素子１４２から発せられる検出光が末広がり状に広がる性質があるため、その広がった部分の光を遮断して収束された光のみを通過させて誤検出を防止できるようにするものである。
同様に、受光素子１４４は、下ケース１１１の外側に開口するように形成された第２配置部としての取付け凹部１１１ｃ内に配置されており、この取付け凹部１１１ｃの底面には、所定径の円形貫通孔１１１ｄが開けられている。この円形貫通孔１１１ｄは、発光素子１４２から発せられ、上記透孔を通過してきた光のみをできるだけ通過させて誤検出を防止できるようにするものである。
【００６５】
第１の５番車１２２、３番車１３３、秒針車１２３、分針車１３４、時針車１３６を組付ける場合は、所定の位置決めピンが、下ケース１１１の円形貫通孔１１１ｄ、位置決めとして用いられるそれぞれの透孔、および上ケース１１２の円形貫通孔１１２ｄを貫くように、順次に組付ける。そして、上ケース１１２および下ケース１１１を接合して一体化した後、位置決めピンを引き抜いて、貫通孔１１２ｄが位置する取付け凹部１１２ｃに発光素子１４２を取付け、また、貫通孔１１１ｄが位置する取付け凹部１１１ｃに受光素子１４４を取付ける。
【００６６】
これにより、貫通孔１１２ｄおよび１１１ｄは完全に塞がれ、上ケース１１２および下ケース１１１により画定される内部空間に外部の光が侵入するのを防止できる。したがって、外部の光が侵入することによる誤検出を防止できると共に、組付け時の位置決め孔と光検出用の透孔とを兼用していることから、これらの孔を別々に設ける場合に比べて装置の集約化、小型化を行なうことができる。
【００６７】
手動修正系１５０は、図２および図３に示すように、上述の分針車１３４の小径歯車１３４ｂおよび時針車１３６の大径歯車１３６ａに噛合する日の裏車１３５と、この日の裏車１３５の大径歯車１３５ａに噛合する歯車１５１ａを有する手動修正軸１５１とにより構成されている。この手動修正軸１５１は、上ケース１１２の外部に位置付けられて利用者が直接指を触れることのできる頭部１５１ｂと、この頭部１５１ｂから伸びて上ケース１１２に形成された開口１１２ｅを貫挿し下ケース１１１に形成された突部１１１ｅに対して軸支された柱状部１５１ｃとからなり、この柱状部１５１ｃの下方領域に歯車１５１ａが形成されている。
【００６８】
手動修正軸１５１は、分針車１３４と同位相で回転するように構成されており、上述の第２駆動系１３０により分針車１３４が駆動されているときには日の裏車１３５を介して分針車１３４と同相で回転するとともに、第２駆動系１３０の非作動時には、頭部１５１ｂを指で回転させることにより、指針位置を手動修正できるようになっている。
【００６９】
上記のように、秒針車１２３の秒針軸１２３ｂが分針車１３４の分針パイプ１３４ｐに挿通され、分針車１３４の分針パイプ１３４ｐが時針車１３６の時針パイプ１３６ｐに挿通されていることから、秒針車１２３と、分針車１３４と、時針車１３６とは、それぞれの回転中心軸が共通しており、また、時刻表示の際に、秒針が６０秒間に１回転、分針が６０分間に１回転、時針が１２時間に１回転するように駆動される。
【００７０】
分針車１３４の分針パイプ１３４ｐの先端部および時針車１３６の時針パイプ１３６ｐの先端部には、図１５に示すように、径方向に所定幅をなして伸びる位置決めのための第１指標としての溝１３４ｇおよび第２指標としての溝１３６ｇが形成されている。そして、これらの溝１３４ｇおよび溝１３６ｇが、一直線に並んだとき所定の時刻例えば１２時００分を指すように設定されている。
【００７１】
このような位置決め指標を設けたことにより、分針車１３４および時針車１３６を下ケース１１１および上ケース１１２により囲繞して覆ってしまった後においても、溝１３４ｇおよび１３６ｇが一直線に並んでいれば予め設定された概略の時刻を指していることが分かるため、その状態を基に分針および時針を容易に取り付けることができ、その他の位置合わせおよび位置確認工程が不要になり、製造ラインおよび検査ラインでの製造時間および検査時間を短縮することができる。なお、位置決め指標としては、上記の溝に限るものではなく、ポッチ等のマークでもよい。
【００７２】
次に、上記構成による動作を、制御回路１４における強制受信時の時刻修正および表示制御動作、並びに受信中またた通常動作中にボタン修正指令を受け付けた場合の動作を中心に、図１６、図１７、および図１８を参照しながら説明する。
【００７３】
たとえばユーザーによりリセット／強制受信スイッチ１２がオンされると、制御回路１４において、各種状態が初期状態に戻され、強制修正モードとなる（ＳＴ１）。このとき、たとえば指針も停止され、液晶表示パネル３０に表示されていた年月や曜日情報等を含むカレンダー表示が初期設定される。
そして、液晶表示パネル３０に、指針位置検出中である旨を示す「０：００」が初期表示され（ＳＴ２）、指針位置の検出が行われる（ＳＴ３）。
指針位置が検出されると、その指針の停止位置の時刻が、液晶表示パネル３０に上記初期表示に代えて表示される（ＳＴ４）。
【００７４】
また、このときリセット／強制受信スイッチ１２がオンされたことにより、たとえば制御回路１４から標準電波信号受信系１１に駆動電力が供給されて、標準電波信号が強制受信される（ＳＴ５）。
標準電波信号受信系１１では、長波受信回路１１ｂから受信状態に応じたパルス信号Ｓ１１が生成され、制御回路１４に出力される。
【００７５】
制御回路１４では、受信した標準電波信号の受信状態を示すパルス信号Ｓ１１とあらかじめ決められた基準範囲とが比較される。
その結果、受信状態が基準範囲内にあり、ボタン修正モードでない場合には（ＳＴ６，ＳＴ７）、受信可能であるとして、受信した電波信号がデコードされる。デコードの結果、時刻化が可能である場合には、発振回路１３による基本クロックに基づいて各種カウンタのカウント制御が行われ、液晶表示パネル３０に受信コードに基づく時刻情報がカレンダー情報としてデジタル表示される（ＳＴ８）。
【００７６】
このように受信電波に基づく時刻をデジタル表示した後に、時刻のアナログ表示を行う指針の早送り修正が行われる（ＳＴ９）。この指針の早送り修正は、内部カウンタの値に応じて秒針用ステッピングモータ１２１および時分針用ステッピングモータ１３１を早送りで回転駆動させ、指針位置をその時刻位置に修正する。
【００７７】
図１６に示すように、以上の指針の早送り修正が終了し、ボタン修正モードでなければ（ＳＴ１０）、制御回路１４において、時刻カウンタのカウントアップが行われ（ＳＴ１１），通常運針における通常修正モードに移行される。
【００７８】
通常修正モードにおいては、あらかじめ設定された受信時刻であるか否かの判断が行われ（ＳＴ１４）、設定時刻であれば標準電波信号の受信が行われる。
すなわち、制御回路１４から標準電波信号受信系１１に駆動電力が供給されて、標準電波信号が受信される。
標準電波信号受信系１１では、長波受信回路１１ｂから受信状態に応じたパルス信号Ｓ１１が生成され、制御回路１４に出力される。
そして、制御回路１４では、受信した標準電波信号の受信状態を示すパルス信号Ｓ１１とがあらかじめ決められた基準範囲とが比較される。
その結果、受信状態が基準範囲内にあり、ボタン修正モードでない場合には（ＳＴ１５，ＳＴ１６）、受信可能であるとして、受信した電波信号がデコードされるデコードの結果、時刻化が可能である場合には、発振回路１３による基本クロックに基づいて各種カウンタのカウント制御が行われ、液晶表示パネル３０に受信コードに基づく時刻情報がカレンダー情報としてデジタル表示されるともに、時刻のアナログ表示を行う指針の早送り修正が行われ（ＳＴ１７）、ステップＳＴ１１の処理に戻る。
【００７９】
なお、ステップＳＴ７において、受信が可能であると判断された場合には、受信信号に基づく時刻情報を含むカレンダー情報ではなく、初期表示が行われる（ＳＴ１８）。
また、このとき、指針の時刻修正も行われず、ドライブ信号ＤＲ_１ がハイレベルでドライブ回路１５に出力される。これにより、報知手段としての発光素子１６が発光し、ユーザーに電波受信が良好でにない旨を報知される。
そして、ステップＳＴ１０の処理に移行する。
【００８０】
また、ステップＳＴ６、またはステップＳＴ１０、またはステップＳＴ１５において、修正スイッチ２１がオンされてボタン修正モードに移行すると、図１８に示すような制御が行われる（ＳＴ１９）。
すなわち、修正桁の判別でなければ、液晶表示パネル３０の修正する桁を点滅させる（ＳＴ１９０１，ＳＴ１９０２）。
ここで、修正スイッチ２１がオフされている場合に（ＳＴ１９０３）、アップスイッチ２３がオンされていると（ＳＴ１９０４）、まずステップ送りとなる（ＳＴ１９０５）。
そして、アップスイッチ２３が２秒以上押されていると（ＳＴ１９０６，ＳＴ１９０７）、早送りとなり（ＳＴ１９０８，ＳＴ１９０９）、対応する桁の修正が行われ、ステップＳＴ１９０４の処理に戻る。
【００８１】
ステップＳＴ１９０４において、アップスイッチ２３がオンされていないと判断されときに、ダウンスイッチ２４がオンされていると（ＳＴ１９１０）、まずステップ戻しとなる（ＳＴ１９１１）。
そして、ダウンスイッチ２４が２秒以上押されていると（ＳＴ１９１２，ＳＴ１９１３）、早戻しとなり（ＳＴ１９１４，ＳＴ１９１５）、対応する桁の修正が行われ、ステップＳＴ１９１０の処理に戻る。
【００８２】
ステップＳＴ１９１０において、ダウンスイッチ２４がオンされていないと判断され、また修正スイッチ２１もオンされていない状態で、あらかじめ設定した自動解除時間が経過すると（ＳＴ１９１７）、修正した時刻が液晶表示パネル３０にデジタル表示される（ＳＴ１９１８）。
そして、ステップＳＴ９と同様の指針早送り修正が行われ、（ＳＴ１９１９）、修正スイッチ２１がオンされていなければ（ＳＴ１９２０）、修正時刻情報並びに年月や曜日等のカレンダー情報がカレンダー表示される（ＳＴ１９２１）。このように制御回路１４では、ボタン修正後の指針早送り中（追従時）は、再度ボタン修正を受け付ける（ＳＴ１９２０）。
その後、図１６に示すステップＳＴ１１の処理に移行する。
【００８３】
なお指針の位置検出は、たとえば図１７に示すように行われる。
すなわち、制御回路１４からドライブ信号ＤＲ_２ がドライブ回路１８のローレベルで出力される。これにより、トランジスタＱ_２ がオンし、発光素子１４２、すなわち発光ダイオードから検出光が発せられる（ＳＴ９０１）。
続いて、制御信号ＣＴＬ_１ が出力されて秒針用ステッピングモータ１２１がパルス駆動され（ＳＴ９０２）、受光素子４４すなわちフォトトランジスタがオンし、検出信号ＤＴ_１ がハイレベル（電源電圧Ｖ_ＣＣレベル）からローレベルに切り換わったか否かの判断が行われる（ＳＴ９０３）。
【００８４】
ここで、フォトトランジスタからの検出信号ＤＴ_１ がハイレベルのままに保持されている場合には、ステップ駆動を行なうためのパルス数を加算する度に、フォトトランジスタからの検出信号ＤＴ_１ がハイレベル（電源電圧Ｖ_ＣＣレベル）からローレベルに切り換わったか否かの判断が行われる（ＳＴ９０４〜ＳＴ９０６）。
そして、パルス数が９に達してもフォトトランジスタからの検出信号ＤＴ_１ 出力がハイレベル（電源電圧Ｖ_ＣＣレベル）からローレベルに切り換わらない場合には、時分針用ステップピングモータ１３１が１ステップ（パルス）駆動され（ＳＴ９０７）、その後再び秒針用ステッピングモータ１２１がステップ駆動され（ＳＴ９０２）て秒針車１２３が回転駆動される。
【００８５】
一方、ステップＳＴ９０３において、フォトトランジスタによる検出信号ＤＴ_１ がハイレベルからローレベルに切り換わったと判断されると、秒針車１２３が早送りされて（ＳＴ９０８）、制御回路１４であらかじめ記憶された出力パターンとの比較が行われる（ＳＴ９０９）。
比較の結果、得られた出力パターンと記憶された出力パターンとが適合しない場合は、ステップＳＴ９０８に戻り、再び秒針車１２３が早送りされる。
【００８６】
一方、得られた出力パターンと記憶された出力パターンとが適合した場合には、その時点（５ステップ目でもフォトトランジスタにより検出信号ＤＴ_１ のレベルがローレベルに切り換わらない場合において次にフォトトランジスタの出力がローレベルに切り換わった時点）で、制御信号ＣＴＬ_１ の出力が停止されて、秒針車１２３の回路駆動が停止される。そして、秒針車１２３が帰零位置で停止する（ＳＴ９１０）。このとき、秒針は所定時刻たとえば正時（０秒）の位置に修正される。
【００８７】
続いて、制御回路１４から制御信号ＣＴＬ_２ が出力されて時分針用ステップモータ１３１のみが所定の出力周波数でパルス駆動されて分針車１３４が早送りされる（ＳＴ９１１）。
そして、フォトトランジスタからの出力パターンと制御回路１４にあらかじめ記憶された出力パターンとの比較が行われる（ＳＴ９１２）。
比較の結果、得られた出力パターンと記憶された出力パターンとが適合しない場合は、ステップＳＴ９１１の処理に戻り、再び分針車１３４が早送りされる。
【００８８】
一方、ステップＳＴ９１２の比較の結果、得られた出力パターンと記憶された出力パターンとが適合した場合は、その時点で、制御信号ＣＴＬ_２ の出力が停止されて、時分針用ステッピングモータ１３１が停止されて、分針車１３４および時針車１３６の駆動が停止される（ＳＴ９１３）。
【００８９】
ここで、上記出力パターンとあらかじめ記憶されたパターンとの比較による時刻修正は、３種類のパターンのいずれかに合わせることにより行われる。
すなわち、分針車１３４によるフォトトランジスタの出力パターンは、図１９（ａ）に示すように、遮光部が作用するオフの幅として、２つの幅狭のＢ部と１つの幅広のＡ部とが交互に現れるようなパターンとなり、また、時針車１３６によるフォトトランジスタの出力パターンは、図１９（ｂ）に示すように、遮光部が作用するオフの幅が３種類のＤ部、Ｅ部、Ｃ部が所定間隔をおいて交互に現れるようなパターンとなり、両者を合成した出力パターンは、図１９（ｃ）に示すように、Ｄ部，Ｂ部およびＡ部が組み合わされたパターンと、Ｅ部，Ｂ部およびＡ部が組み合わされたパターンと、Ｃ部，Ｂ部およびＡ部が組み合わされたパターンの３種類が所定間隔をおいて現れるパターンとなる。
なお、図１９に示すパターンのうちオンとなるパターンの部分は、実際には３番車１３３の遮光部によりオフとなる部分があるので、歯抜け状のパターンとなっている。
【００９０】
そこで、Ｄ部，Ｂ部およびＡ部の組み合わせからなるパターンが確認されたときを例えば４時００分、Ｅ部，Ｂ部およびＡ部の組み合わせからなるパターンが確認されたときを、たとえば８時００分、Ｃ部，Ｂ部およびＡ部の組み合わせからなるパターンが確認されたときを、たとえば１２時００分としてあらかじめ設定しておけば、これらのパターンのいずれかを検出したきに時分針用ステッピングモータ１３１を停止させることで、分針車１３４および時針車１３６すなわち分針２０３および時針２０４を所定の時刻に時刻修正することができる。
【００９１】
そして、時分針用ステッピングモータ１３１を停止させた後、制御回路１４によるドライブ信号ＤＲ_２ がハイレベルに切り換えられる。
これにより、ドライブ回路１８のトランジスタＱ_２ がオフし、発光ダイオードの発光が停止され（ＳＴ９１４）、時刻修正動作を終了する。
【００９２】
このように、指針の修正動作において、分針車１３４および時針車１３６に、検出光を通過させるための透孔として、円弧状透孔すなわち長孔を用いているため、光検出センサ１４０がオンとなる範囲が広がり、位置検出時間を短縮でき、その結果、秒針の時刻修正を行なう時間を短縮することができる。また、時針車１３６に３種類の遮光部Ｃ，Ｄ，Ｅを設けたことから、３箇所のいずれかを検出して時刻修正を行なうことができ、また、最も回転速度の遅い時針車１３６を従来に比べ略１／３回転させるだけで位置検出ができ、これにより、分針２０３および時針２０４の時刻修正を行なう時間を短縮することができる。
【００９３】
以上説明したように、本実施形態によれば、デジタル表示制御を行うに際して、初期の指針位置検出中は、特定の初期値、たとえば「０：００」を表示させ、位置検出後と受信中は指針停止位置の時刻を表示させ、受信完了時は受信したデータを表示させ、指針は早送り修正を行わせ、また、受信中または通常動作時は、ボタン修正を受け付け、時刻修正時に、アップスイッチ２３、またはダウンスイッチ２４を操作した瞬間（たとえ押しボタンの場合、押した瞬間）に、制御信号ＣＴＬ_１ ，ＣＴＬ_２ の出力を停止して指針をその位置で停止させ、停止時刻を表示させ、デジタル表示で時刻修正を行い修正モードを解除すると、指針を早送りさせてデジタル表示に追従させる制御回路１４を設けたので、時刻修正時に指針位置や受信など現在の動作が確認でき、しかも修正時刻を短時間で表示することができる利点がある。
【００９４】
【発明の効果】
以上説明したように、本発明によれば、時刻修正時に指針位置や受信など現在の動作が確認でき、しかも修正時刻を短時間で表示することができる利点がある。
【図面の簡単な説明】
【図１】本発明に係る電波修正時計の信号処理系回路の一実施形態を示すブロック構成図である。
【図２】本発明に係る電波修正時計の指針位置検出装置の一実施形態の全体構成を示す断面図である。
【図３】本発明に係る指針位置検出装置の要部の平面図である。
【図４】図１の電波修正時計の外観を示す正面図である。
【図５】本発明に係る制御回路における初期修正モード時の帰零動作前の受信電波状態の判別基準を説明するための図である。
【図６】標準時刻電波信号の時刻コードの一例を示す図である。
【図７】自動修正時計の一部である秒針を駆動する第１駆動系を示す平面図である。
【図８】自動修正時計の一部である分針および時針を駆動する第２駆動系を示す平面図である。
【図９】秒針を駆動する第１駆動系の一部をなす第１の５番車を示す平面図である。
【図１０】秒針を駆動する第１駆動系の一部をなす秒針車を示す平面図である。
【図１１】秒針を駆動する第１駆動系の一部をなす秒針車の他の例を示す平面図である。
【図１２】分針および時針を駆動する第２駆動系の一部をなす３番車を示す平面図である。
【図１３】分針および時針を駆動する第２駆動系の一部をなす分針車を示す平面図である。
【図１４】分針および時針を駆動する第２駆動系の一部をなす時針車を示す平面図である。
【図１５】分針パイプおよび時針パイプの先端部を示す端面図である。
【図１６】本発明に係る電波修正時計の制御回路における強制受信時の時刻修正および表示制御動作を説明するためのフローチャートである。
【図１７】本発明に係る電波修正時計の制御回路における指針位置修正動作を説明するためのフローチャートである。
【図１８】本発明に係る電波修正時計の制御回路におけるボタン修正モード時の動作を説明するためのフローチャートである。
【図１９】修正動作において、分針車、時針車、および両者の合成による検出手段の出力パターンを示す図である。
【符号の説明】
１０…信号処理系回路
１１…標準電波信号受信系
１２…リセットスイッチ
１３…発振回路
１４…制御回路
１５…ドライブ回路
１６…報知手段としての発光素子
１７…バッファ回路
１８…ドライブ回路
２０…修正用スイッチ群
２１…修正スイッチ
２２…表示切換スイッチ
２３…アップスイッチ
２４…ダウンスイッチ
１００…時計本体
１１１…下ケース（第２ケース）
１１１ｃ…取付け凹部（第２配置部）
１１１ｄ…円形貫通孔
１１２…上ケース（第１ケース）
１１２ｃ…取付け凹部（第１配置部）
１１２ｄ…円形貫通孔
１１３…中板
１２０…第１駆動系
１２１…秒針用ステッピングモータ（第１駆動源）
１２２…第１の５番車（第１伝達歯車、第１検出用歯車）
１２２ｃ…透孔
１２３…秒針車（第２検出用歯車、第１指針車）
１２３ｃ…透孔
１２３ｄ…位置決め遮光部
１２３ｅ…付勢ばね
１２３ｆ…切り欠き孔
１２３ｇ…切り欠き孔
１３０…第２駆動系
１３１…分針系ステッピングモータ（第２駆動源）
１３２…第２の５番車
１３３…３番車（第２伝達歯車、第３検出用歯車）
１３３ｃ…透孔
１３４…分針車（第４検出用歯車、第２指針車）
１３４ｃ…円弧状透孔
１３４ｄ…円弧状透孔
１３４ｅ…円弧状透孔
１３４ｇ…溝（第１指標）
１３４ｐ…分針パイプ
１３５…日の裏車
１３６…時針車（第５検出用歯車、第２指針車）
１３６ｃ…円弧状透孔
１３６ｄ…円弧状透孔
１３６ｅ…円弧状透孔
１３６ｇ…溝（第２指標）
１３６ｐ…時針パイプ
１４０…光検出センサ（検出手段）
１４２…発光素子
１４４…受光素子
１５０…手動修正系
Ｖ_ＣＣ…電源電圧
Ｃ_１ 〜Ｃ_３ …キャパシタ
Ｒ_１ 〜Ｒ_５ …抵抗素子[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automatic timepiece such as a radio-controlled timepiece that can perform analog time display using hands and a canned display such as digital time display on a liquid crystal display device or the like, for example, a radio-controlled timepiece that receives a radio signal and corrects the time.
[0002]
[Prior art]
The radio-controlled timepiece has a function of receiving, for example, a long-wave (40 kHz) standard radio wave that conveys Japan Standard Time with high accuracy, and performing so-called nulling based on the received signal. A pointer position detection device is provided to accurately adjust the position of the pointer on the hour when the return is zero.
[0003]
This type of radio-controlled timepiece incorporates a reception system circuit that receives a standard radio wave and a control circuit that drives the pointer drive system based on the received signal to correct the time. In the initial state, there are an initial correction mode without time data and a normal correction mode.
[0004]
In the initial correction mode, for example, when a radio-controlled timepiece is purchased and placed at a predetermined position indoors, a battery is first inserted and set at a predetermined position of the timepiece.
Next, as initial needle alignment, needle position detection and a nulling operation are performed.
When the nulling operation is completed, reception of the standard radio wave by the receiving circuit is started, and this received radio wave is input to the control circuit.
[0005]
In the control circuit, if the time can be set as a result of the decoding operation that performs the decoding operation to the time based on the input received radio wave, the pointer position is corrected to the position corresponding to the decoded time code, and the initial correction The mode ends and the normal correction mode is entered.
[0006]
On the other hand, when the time cannot be set, the position of the pointer is not corrected, and the fact is notified to the user, for example, by turning on an LED or the like as a notification means provided on the watch body.
[0007]
In the normal correction mode, after the pointer position is corrected in the initial correction mode, the pointer position is corrected to a position corresponding to the time code of the received radio signal.
[0008]
[Problems to be solved by the invention]
By the way, although the above-described radio-controlled timepiece has only an analog display function for displaying time by hands, in recent years, in addition to this analog display, a digital display for performing candeal display such as time on a liquid crystal display device or the like. Realization of a radio-controlled watch that also has functions is desired.
[0009]
In this radio-controlled timepiece having an analog display function and a digital display function, for example, when a standard radio signal is forcibly received by operating a correction switch or the like at a desired time to correct the time, the time indicated by the corrected pointer In consideration of the accuracy between the digital display time and the digital display time, the correction of the pointer position for analog display and the correction of the digital display time may be performed in conjunction with each other.
[0010]
However, for example, if the movement mounted on the radio-controlled timepiece is a type that uses two motors for the second hand and the hour and minute hands, it takes time to correct the pointer position, and the digital display is adjusted in conjunction with this correction of the pointer position. If the time is adjusted, the time display will be delayed.
As a result, in the normal time correction mode, it takes time until both the analog and digital time adjustments are completed, and during that time it is impossible to confirm what operation is being performed on the radio wave correction watch side. It is necessary to wait until the time correction is completed and the correction time is displayed, and the correction time cannot be known in a short time.
[0011]
The present invention has been made in view of such circumstances, and an object of the present invention is to provide an automatic correction timepiece capable of confirming the current operation such as the position of the pointer and reception when the time is corrected and displaying the correction time in a short time. There is to do.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an automatic timepiece that performs analog time display using a pointer and digital time display using a display means, and corrects the display time in response to a time code. When the pointer driving means for driving and the time code are received, the display means digitally displays the time information corrected according to the input time code, and then outputs the control signal to the pointer driving means according to the input time code. Control means for correcting the pointer position atA pointer position detecting means capable of detecting a pointer position in response to a driving signal, and the control means stops the pointer driving means by the control signal by the control signal during reception of the time code, and displays the display The information indicating that the pointer position is being detected is digitally displayed on the means, and the pointer position is detected by outputting the driving signal to the pointer position detecting means so that the time code is received and the time code is detected. When at least one of the time points is completed, the time at the stop position of the hands is digitally displayed on the display means, and when the determination of the time code is completed, time information corresponding to the input time code is digitally displayed..
[0014]
According to the present invention, there is provided a correction switch for correcting the display information of the display means, and the control means is configured to switch the correction switch during at least one of receiving the time code and during normal hand movement. When the correction switch is operated, the pointer driving means is stopped by the control signal, the stop time is digitally displayed on the display means, and the time correction by digital display is completed. A control signal is output to the pointer driving means to correct the pointer position to the time position corresponding to the corrected time.
[0015]
Further, in the present invention, the control means causes the pointer position to be corrected by fast-forwarding.
[0016]
In the present invention, the control means decodes the received time code and corrects it to the decoded time when it is possible, and does not correct the time when it is impossible. .
[0017]
According to the present invention, when the time code is received by the control means, the time information corrected according to the input time code is digitally displayed on the display means. Thereafter, a control signal is output from the control means to the pointer driving means, and the pointer position is corrected, for example, by fast-forwarding at a time corresponding to the input time code.
[0018]
According to the present invention, the control means stops the pointer by the control signal while the time code is being received. Information indicating that the pointer position is being detected is digitally displayed on the display means, and the pointer position is detected by the pointer position detecting means.
When the time code is being received and when the time code detection is completed, the time at the stop position of the pointer is digitally displayed on the display means. When the determination of the time code is completed, time information corresponding to the input time code is digitally displayed.
[0019]
Further, according to the present invention, the control means accepts an interruption by the correction switch when at least one of the time code reception and the normal hand movement is being performed. When the correction switch is operated, the pointer is stopped and the stop time is digitally displayed on the display means.
After the time correction by digital display is completed, a control signal is output to the pointer driving means, and the pointer position is corrected, for example, by fast-forwarding at a time position corresponding to the corrected time.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a block diagram showing an embodiment of a signal processing system circuit of a radio correction timepiece as an automatic correction timepiece according to the present invention, and FIG. 2 shows an embodiment of a pointer position detecting device of the radio correction timepiece according to the present invention. FIG. 3 is a plan view of a main part of a pointer position detecting device for a radio-controlled timepiece according to the present invention.
[0021]
In the figure, 10 is a signal processing system circuit, 11 is a standard radio signal reception system, 12 is a reset / forced reception switch, 13 is an oscillation circuit, 14 is a control circuit, 15 is a drive circuit, 16 is a light emitting element as a notification means, 17 is a buffer circuit, 18 is a drive circuit, 20 is a correction switch group, 30 is a liquid crystal display panel, V_CCIs the power supply voltage, C₁~ C₃Is a capacitor, R₁~ R₅Is a resistance element, 100 is a watch body, 120 is a first drive system for driving a second hand, 130 is a second drive system for driving a minute hand and an hour hand that are hands, 140 is a light-transmitting light detection sensor, and 150 is a user's A manual correction system in which the time is set directly by hand is shown.
The buffer 17, the first drive system 120, and the second drive system 130 constitute pointer drive means. The control circuit 14 and the drive circuit 18 are 140, a light transmission type light detection sensor, the first drive system 120, and the second drive system. The driving system 130 constitutes a pointer position detection unit.
[0022]
As shown in FIG. 4, the liquid crystal display panel 30 is provided on the lower side (6 o'clock side) from the pointer shaft at the approximate center of the dial 201.
In FIG. 4, 202 indicates a second hand, 203 indicates a minute hand, and 204 indicates an hour hand.
[0023]
The standard radio wave signal receiving system 11 receives a long wave (for example, 40 kHz) including a time code signal transmitted from, for example, a key station and the receiving antenna 11a, performs predetermined signal processing, and outputs the signal to the control circuit 14 as a pulse signal S11. And a long wave receiving circuit 11b. The long wave receiving circuit 11 is composed of, for example, an RF amplifier, a detection circuit, a rectification circuit, and an integration circuit.
[0024]
Note that a long wave (40 kHz) standard radio wave that is received by the standard radio wave signal receiving system 11 and conveys the Japanese standard time with high accuracy is transmitted in a form as shown in FIG. Specifically, in the case of a “1” signal, a 40 kHz signal is sent for 500 ms (0.5 s) in 1 second (s), and in the case of a “0” signal, it is 1 second (s). A signal of 40 kHz is sent for 800 ms (0.8 s), and in the case of a “P” signal, a signal of 40 kHz is sent for 200 ms (0.2 s) in one second (s).
When the reception state is good, as shown in FIG. 5B, the long wave receiving circuit 11b outputs a signal S11 to the control circuit 14 as a pulse signal corresponding to the presence or absence of 40 kHz.
[0025]
FIG. 6 shows an example of the time code of the standard time radio signal.
Current Japanese longwave standard radio waves are experimentally transmitted from Sanwa Town, Ibaraki Prefecture under the operation of the Communications Research Laboratory (CRL) of the Ministry of Posts and Telecommunications. Accumulated date from day.
[0026]
The time data is transmitted at 1 bit / sec. One frame is one frame, and information on the accumulated date from the above-mentioned minute / hour / January 1 is provided as a BCD code in this frame. The transmitted data includes a marker of P code in addition to 0 · 1, and this P code has several places in one frame, and the minute (0 seconds), 9 seconds, 19 seconds, 29 seconds, 39 Appears in seconds, 49 seconds, 59 seconds. This P code appears continuously only once at 59 seconds and 0 seconds in one frame, and the position where this P code appears continuously becomes the minute position. In other words, time data such as minute / hour data is determined in the frame with reference to this minute position, so that the time data cannot be extracted unless the minute position is detected.
[0027]
Next, the long wave standard radio wave formalized in 1999 will be described.
[0028]
Japan's standard radio wave is currently an experimental station as described above, but is scheduled to become an official station in 1999 for the purpose of advanced use of the standard radio wave. Along with this. In addition to the current (experimental station) transmission data, the last two digits of the year, day of the week, minute parity, hour parity, spare bits scheduled to be used when daylight saving time is introduced, and leap seconds have been added (see Fig. 6 (a)). . Also, wave stop information for interrupting transmission of radio waves was added at 15 minutes and 45 minutes per hour (see FIG. 6B). The data transmission method is the same as the current method, that is, one frame per minute at 1 bit / second, even if it is an official station. Of these newly established information, spare bits, leap second information, and stop information will be described in particular.
[0029]
As shown in Table 1, the reserved bits use SU1 and SU2. These are prepared for future information expansion. When this bit is used in daylight saving time information, when SU1 = SU2 = 0, there is “no change to daylight saving time within 6 days”, and when SU1 = 1 · SU2 = 0, there is “change to daylight saving time within 6 days”, When SU1 = 0 and SU2 = 1, the information format is “daylight saving time in progress”, and when SU1 = SU2 = 1, “daylight saving time ends within 6 days”. Daylight saving time has not yet been introduced in Japan, and it is still unknown, but when it comes to European summertime changes, it is often done in the middle of the night.
[0030]
[Table 1]

[0031]
Next, as shown in Table 2, the leap second uses 2 bits of LS1 and LS2, and when LS1 = LS2 = 0, “the leap second is not corrected within one month”, and when LS1 = 1 · LS2 = 0 “There is a negative leap second (deletion) within one month”, that is, 1 minute becomes 59 seconds, and LS1= LS2In the case of = 1, “there is a positive leap second (insertion) within one month”, that is, an information form in which one minute is 61 seconds. The leap second correction timing has already been determined and is to be performed immediately before January 1 or July 1 of UTC time. Therefore, in Japan time (JTC), it will be performed immediately before 9:00 am on January 1 or July 1.
[0032]
[Table 2]

[0033]
As shown in (a), (b), and (c) of Table 3, ST1, ST2, ST3, ST4, ST5, and ST6 are used as the stop information. In ST5 and ST6, the stop information of the stop period is provided. First, the stoppage start notice will be described. When ST1 = ST2 = ST3 = 0, “No stoppage is planned”, and when ST1 = ST2 = 0 · ST3 = 1, “Stop within 7 days”, ST1 = 0 · ST2 = 1・ When ST3 = 0, “Stop within 3 days from 3”, ST1 = 0 ・ When ST2 = ST3 = 1, “Stop within 2 days”, When ST1 = 1 and ST2 = ST3 = 0, “Stop within 24 hours” In the case of “stop”, ST1 = 1 · ST2 = 0 · ST3 = 1 “stops within 12 hours”, and ST1 = ST2 = 1 · ST3 = 0 indicates “stops within 2 hours”. Next, the stop time notice is “only daytime” when ST4 = 1, and “all day or no stoppage plan” when ST4 = 0. Next, the stop period notice is “no stop plan” at ST5 = ST6 = 0, “stop for 7 days or longer or unknown period” at ST5 = 0 · ST6 = 1, “ Stops within 2 to 6 days, ST5 = ST6 = 1 indicates “stops in less than 2 days”.
[0034]
[Table 3]

[0035]
As described in detail above, the transmission information by radio waves including the long wave standard time information that is managed by the Ministry of Posts and Telecommunications Research Laboratory (CRL), in addition to the standard time information, information by spare bits, leap second information, wave breakage Information is also included in the transmission information.
[0036]
The reset / forced reception switch 12 is turned on when various states of the control circuit 14 are returned to the initial state.
When the reset / forced reception switch 12 is turned on or when a battery (not shown) is set, the radio-controlled timepiece enters a correction mode (forced correction mode) in which a standard time radio signal is forcibly received and corrected. Become.
[0037]
The oscillation circuit 13 includes a crystal oscillator CRY and a capacitor C₂, C₃And a basic clock having a predetermined frequency is supplied to the control circuit 14.
[0038]
The control circuit 14 has a minute hand counter, a second hand counter, a standard minute / second counter, etc. (not shown). In the initial correction mode, the control circuit 14 receives the pulse signal S11 from the standard radio signal receiving system 11 and receives the received standard radio signal. Is compared with a predetermined reference range, and if the reception state is within the reference range, the control signal CTL_1,CTL₂Is output to the stepping motor 121 for the second hand and the stepping motor 131 for the hour / minute hands via the buffer 17 to perform the initial setting of the pointer position, that is, the zero return operation, and the reception state is not within the reference range. , Control signal CTL_1,CTL₂Drive signal DR without outputting₁Is output to the drive circuit 15 to cause the light emitting element 16 as the notification means to emit light and notify the user that radio wave reception is hardly possible.
When the reception state is within the reference range, a zero return operation is performed, and then the received radio wave signal is decoded. If the time can be set as a result of the decoding, the basic clock by the oscillation circuit 13 is used. Based on the count control of various counters and the detection signal DT by the light detection sensor₁Depending on the input level of the control signal CTL_1,CTL₂Is output to the stepping motor 121 for the second hand and the stepping motor 131 for the hour / minute hand through the buffer 17 to perform the time control by performing the rotation control.
On the other hand, if it is impossible to time the decoding result, the control signal CTL_1,CTL₂Drive signal DR without outputting₁Is output to the drive circuit 15 to cause the light emitting element 16 as the notification means to emit light, thereby notifying the user that the radio wave reception is not good.
Thereby, the operation in the initial correction mode is completed.
[0039]
The control circuit 14 controls the normal correction mode after completing the operation of the initial correction mode.
In the normal correction mode, the same operation as that after the nulling operation in the initial correction mode is performed.
Specifically, when the received radio wave signal is decoded and the time can be set as a result of the decoding, the count control of various counters based on the basic clock by the oscillation circuit 13 and the detection signal DT by the light detection sensor 140 are performed.₁Depending on the input level of the control signal CTL_1,CTL₂Is output to the stepping motor 121 for the second hand and the stepping motor 131 for the hour / minute hands through the buffer 17 to perform time control by performing rotation control.
On the other hand, if it is impossible to time the decoding result, the control signal CTL_1,CTL₂Drive signal DR without outputting₁Is output to the drive circuit 15 to cause the light emitting diode 16 as the notification means to emit light, thereby notifying the user that radio wave reception is not good.
[0040]
In the above description, when the reception state is determined to be out of the reference range, the radio wave is weak or there is a lot of noise.
When the radio wave is very weak, as shown in FIG. 5C, the signal remains at the low level (L) or the high level (H) for several signals.
When there is a lot of noise, the level changes regardless of the time radio wave.
When the signal S11 in these states is received, for example, twice or more in 10 seconds, it is determined that the reception state is out of the reference range.
Specifically, for example, with a detection time of about 10 seconds, when no level change is detected within 1 second within the time, and when the detected pulse width is around 0.8, 0.5, 0.2 seconds If no NG occurs, it is determined that reception is not possible.
[0041]
When the control circuit 14 corrects the time by receiving a preset time or a standard time radio signal forcibly, as described above, the control circuit 14 corrects the position of the pointer having an analog time display function. Then, display control is performed on the liquid crystal display panel 30 having a digital display function.
Specifically, when performing the digital display control, the control circuit 14 displays a specific initial value, for example, “0:00” during initial pointer position detection, and the pointer stop position after position detection and during reception. When the reception is completed, the received data is displayed, and the pointer makes a fast-forward correction.
Also, during reception or normal operation, an interrupt for button correction by the correction switch group is accepted, and at the moment when the up switch 23 or the down switch 24 is operated at the time adjustment (even in the case of a push button) , Control signal CTL₁, CTL₂Is stopped, the pointer is stopped at that position, and the stop time is displayed.
When the time is corrected on the digital display and the correction mode is released, the pointer is fast-forwarded to follow the digital display.
Note that the control circuit 14 accepts the button correction again during the fast-forwarding of the pointer after the button correction (following).
[0042]
The drive circuit 15 includes a pnp transistor Q1 and a resistance element R₁ , R₂ It is comprised by.
The base of the transistor Q1 is the resistance element R₁ Drive signal DR of the control circuit 14 via₁
Connected to the output line, and the collector is the resistance element R₂ Of the light emitting element 16 made of a light emitting diodeanodeAnd the emitter is connected to the power supply voltage V_CCConnected to the supply line. The cathode of the light emitting element 16 is grounded.
That is, the light emitting element 16 receives a low level drive signal DR from the control circuit 14.₁ Is connected to the drive circuit 15 so that it emits light when it is output.
[0043]
The drive circuit 18 includes a pnp transistor Q2 and a resistance element R₃, R₄It is comprised by.
[0044]
The correction switch group 20 includes four correction mode switches 21, a display changeover switch 22, an up switch (UP) 23, and a down switch (DN) 24 for correcting the digital display of the liquid crystal display panel 30. Connected in parallel to the input terminal.
When the correction mode switch 21 is turned on, the control circuit 14 shifts to a button correction mode described in detail later.
The control circuit 14 receives the correction mode switch 21 during the reception of the standard radio signal or during normal operation, and shifts to the button correction mode.
The up switch 23 or the down switch 24 is, for example, a push button switch. When the digital display time is corrected, the control circuit 14 controls the control signal CTL at the moment when these switches are pressed.₁, CTL₂Is stopped and the stop time is displayed on the liquid crystal display panel 30.
Then, the control circuit 14 corrects the time by digital display, and when the correction mode is canceled, causes the pointer to follow the fast-forward digital display.
[0045]
The watch body 100 includes a lower case 111 as a second case and an upper case 112 as a first case that are connected to face each other to form an outline, and a space formed by the lower case 111 and the upper case 112. A middle plate 113 arranged in a state of being connected to the lower case 111 at a substantially central portion, and a first drive system with respect to predetermined positions of the lower case 111, the middle plate 113 and the upper case 112 in the space. 120, the second drive system 130, the light detection sensor 140, the manual correction system 150, and the like are fixed or pivotally supported.
[0046]
As shown in FIGS. 2, 3 and 7, the first drive system 120 includes a substantially U-shaped stator 121a, a drive coil 121b wound around one leg piece of the stator 121a, and the stator 121a. A second hand stepping motor 121 constituted by a rotor 121c that is rotatably arranged between the other magnetic poles, and a first transmission gear (first detection gear) in which a large-diameter gear 122a meshes with a pinion 121c ′ of the rotor 121c. And a second hand wheel 123 as a second detection gear (first pointer wheel) meshed with the small-diameter gear 122b of the first fifth wheel 122.
Here, in the second hand stepping motor 121, the stator 121a is mounted and fixed on the intermediate plate 113, the rotor 121c is pivotally supported by the intermediate plate 113 and the upper case 12, and the output control signal CTL of the control circuit 14 is provided.₁The rotation direction, rotation angle, and rotation speed are controlled based on the above.
[0047]
The first fifth wheel & pinion 122 is formed such that the number of teeth of the large-diameter gear 122a is 60 and the number of teeth of the small-diameter gear 122b is 15, and is pivotally supported by the lower case 111 and the upper case 112. The large-diameter gear 122a meshes with the rotor 121c (pinion 121c ′) of the second hand stepping motor 121 to reduce the rotational speed of the rotor 121c to a predetermined speed. In this first fifth wheel & pinion 122, as shown in FIG. 9 and FIG. 11, three circular shapes arranged at equal intervals (center angle α1 is 120 °) in the circumferential direction in a region overlapping with the second hand wheel 123. A through hole 122c is formed. The through-hole 122c not only allows the detection light of the light detection sensor 140 to pass, but at least one of them is used as a positioning hole (determining hole) when assembling the first fifth wheel & pinion 122. is there.
[0048]
In the second hand wheel 123, the large-diameter gear 123a has 60 teeth, one end of the shaft portion is pivotally supported by the upper case 112, and the second hand passes through the middle plate 113 to the lower case 111 side. A shaft 123b is press-fitted, and the second hand shaft 123b is inserted into a minute hand pipe 134p to be described later, and a second hand 202 is attached to the tip thereof. As shown in FIG. 10, the second hand wheel 123 has eleven circular shapes arranged at equal intervals in the circumferential direction (center angle α2 is 30 °) in a region overlapping the first fifth wheel & pinion 122 by rotation. A through-hole 123c formed and a positioning light-shielding portion 123d having a different pitch at only one place (the central angle between the through-hole 123c and the through-hole 123c is 60 °) are formed. The second hand is configured to indicate the hour when the through hole 122c of the first fifth wheel & pinion 122 first faces the through hole 123c after facing the positioning light-shielding portion 123d.
[0049]
The through-hole 123c not only allows the detection light of the light detection sensor 140 to pass through, but at least one of them is used as a positioning hole (determining hole) when the second hand wheel 123 is assembled.
Further, inside these through-holes 123c, arc-shaped biasing springs 123e that are long in the circumferential direction and project in the direction of the rotation axis are defined by the cutout holes 123f. The arcuate urging spring 123e urges the second hand wheel 123 in the rotation axis direction.
[0050]
Here, the positioning light-shielding portion 123d is formed at a position away from the notch hole 123f in the circumferential direction, that is, at a region where the two notch holes 123f are separated from each other. Therefore, a sufficient distance between the cutout hole 123f and the positioning light-shielding portion 123e can be secured, so that the detection light does not go around the cutout hole 123f in the region of the positioning light-shielding portion 123d, and the positioning light-shielding portion 123d can reliably Detection light can be blocked. That is, since the positioning light-shielding portion 123d is formed at a position away from the region where the notch hole 123f is prone to erroneous detection due to detection light wraparound, the positioning light-shielding portion 123d is moved to the rotation angle of the second hand wheel 122. By using it for positioning, it is possible to perform reliable positioning.
[0051]
In the second hand wheel 122, as shown in FIG. 10, instead of providing a plurality (11) of through holes 123c, as shown in FIG. 11, a through hole 123c at a position facing the positioning light-shielding portion 123d in the radial direction. Other through holes 123c may be formed integrally with the cutout holes 123g, leaving only the holes. According to this, it is possible to further ensure the passage of the detection light in the portion where the passage of the detection light is allowed, and to reduce the waste of the material forming the second hand wheel 122.
[0052]
As shown in FIGS. 2, 3, and 8, the second drive system 130 includes a substantially U-shaped stator 131a, a drive coil 131b wound around one leg piece of the stator 131a, and the stator 131a. No. 5 as an intermediate gear having a large-diameter gear 132a meshed with a pinion 131c 'of the rotor 131c and a stepping motor 131 for hour and minute hands constituted by a rotor 131c rotatably arranged between the other magnetic poles A third wheel 133 as a second transmission gear (third detection gear) in which a large-diameter gear 133a is engaged with a small-diameter gear 132b of the second wheel 5 and the second fifth wheel 132; and a small diameter of the third wheel 133 A minute hand wheel 134 as a fourth detection gear (second pointer wheel) in which a large diameter gear 134 a is engaged with the gear 133 b, and a large diameter gear 135 a on a small diameter gear 134 b of the minute hand wheel 134. A minute wheel 135 of the day as meshed with the intermediate gear is constituted by the hour wheel 136 of the fifth detection gear in mesh with the small diameter gear 135b of the minute wheel 135 of the day (second hand wheel).
Here, in the hour / minute hand stepping motor 131, the stator 131 a is mounted and fixed on the intermediate plate 113, and the rotor 131 c is pivotally supported by the intermediate plate 113 and the upper case 112. Based on this, the rotation direction, rotation angle and rotation speed are controlled.
[0053]
The second fifth wheel & pinion 132 is formed such that the number of teeth of the large diameter gear 132a is 60 and the number of teeth of the small diameter gear 132b is 15, and is pivotally supported by the intermediate plate 113 and the upper case 112, and the large diameter gear 132a. Meshes with the rotor 131c (pinion 131c ′) of the hour / minute hand stepping motor 131 to reduce the rotational speed of the rotor 131c to a predetermined speed. As the second fifth wheel & pinion 132, the above-mentioned first fifth wheel & pinion 122 may be used, that is, the one provided with the through hole 122c may be used. Thereby, parts can be shared and the cost of the product can be reduced.
[0054]
In the third wheel 133, the large-diameter gear 133a has 60 teeth and the small-diameter gear 133b has ten teeth. One end of the shaft portion is pivotally supported by the upper case 112, and the other end side is the middle plate 113. It is rotatably arranged in the penetrating state, and the rotation of the second fifth wheel & pinion 132 is decelerated and transmitted to the minute hand wheel 134. Further, as shown in FIG. 10, the third wheel & pinion 133 is arranged at equal intervals in the circumferential direction (center angle α3 is 36 °) in a region overlapping with the second hand wheel 123 and the first fifth wheel & pinion 122 by rotation. Ten circular through holes 133c are formed. The through-hole 133c not only allows the detection light of the light detection sensor 140 to pass through, but at least one of them is used as a positioning hole (determining hole) when the third wheel 133 is assembled.
[0055]
In the minute hand wheel 134, the large-diameter gear 134a has 60 teeth and the small-diameter gear 134b has 14 teeth, and the minute hand pipe 134p, in which the small-diameter gear 134b is integrally formed, is formed at the side surface. It is formed so as to have a substantially T-shape when viewed. One end portion of the minute hand pipe 134p is pivotally supported by the intermediate plate 13, and the other end side shaft portion is rotatably inserted into an hour hand pipe 136p of an hour hand wheel 136 described later. The minute hand 1 pipe 34p passes through the lower case 111 and protrudes toward the dial plate 201 of the timepiece, and the minute hand 203 is attached to the tip thereof.
[0056]
Further, as shown in FIG. 13, the minute hand wheel 134 has three arc-shaped through holes that are long in the circumferential direction in the region overlapping with the second hand wheel 123, the first fifth wheel 122, and the third wheel 133 by rotation. 134c, 134d, and 134e are formed. The arc-shaped through-hole 134c and the arc-shaped through-hole 134d are formed with a center angle α5 separated by 30 °, and the arc-shaped through-hole 134d and the arc-shaped through-hole 134e are formed with a center angle α6 separated by 30 °. Further, the arc-shaped through hole 134e and the arc-shaped through hole 134c are formed at a central angle α7 and separated by 60 °. That is, the light-shielding portion A having the widest width is formed between the arc-shaped through hole 134e and the arc-shaped through hole 134c, and between the arc-shaped through hole 134c and the arc-shaped through hole 134d and between the arc-shaped through hole 134d and A light shielding part B narrower than the light shielding part A is formed between the arcuate through hole 134e.
[0057]
The arc-shaped through hole 134c is formed by a circular portion 134c 'on one end side, a wide arc portion 134c "extending from the other end side, and a narrow arc portion 134c"' connecting the two. The circular portion 134 c ′ defined by the narrow arc portion 134 c ″ ″ is used not only for passing detection light but also as a positioning hole (determining hole) when the minute hand wheel 134 is assembled.
[0058]
In the hour hand wheel 136, the number of teeth of the large-diameter gear 136a is 40, and a cylindrical hour hand pipe 136p is integrally attached at the center thereof, and the minute hand pipe 134p described above is provided inside the hour hand pipe 136p. Is inserted. The hour hand pipe 136p is inserted into a bearing hole 111a formed in the lower case 11 so as to be pivotally supported, and the tip end of the hour hand pipe 136p penetrates the lower case 111 to the timepiece dial 201 side. The hour hand 204 is attached to the tip.
[0059]
Further, as shown in FIG. 14, the hour hand wheel 136 includes three pieces that are long in the circumferential direction in a region overlapping with the second hand wheel 123, the first fifth wheel 122, the third wheel 133, and the minute hand wheel 134 by rotation. Arc-shaped through holes 136c, 136d, and 136e are formed. The arc-shaped through-hole 136c and the arc-shaped through-hole 136d are formed with a central angle α8 of 45 ° apart, and the arc-shaped through-hole 136d and the arc-shaped through-hole 136e are formed with a central angle α9 of 60 ° apart. In addition, the arc-shaped through hole 136e and the arc-shaped through hole 136c are formed with a central angle α10 and separated by 30 °, and the lengths of the arc-shaped through holes 136c, 136d, and 136e are center angles β1 + β2, β3 and β4 are set to be 75 °, 60 °, and 90 °, respectively. That is, the narrowest light-shielding portion C is formed between the arc-shaped through hole 36e and the arc-shaped through-hole 136c, and between the arc-shaped through-hole 136c and the arc-shaped through-hole 136d than the light-shielding portion C. A wide light-shielding portion D is formed, and a light-shielding portion E wider than the light-shielding portion D is formed between the arc-shaped through hole 136d and the arc-shaped through-hole 136e.
[0060]
Further, the arc-shaped through hole 136c connects the circular portion 136c ′ positioned at 7.5 ° with the central angle β1 from one end side and the wide arc portion 136c ″ extending from the other end side, and connects the both. The narrow arc portion 136c ′ ″ located on both sides of the portion 136c ′ is formed. The circular portion 136 c ′ defined by the narrow arc portion 136 c ″ ″ is used not only for passing the detection light but also as a positioning hole (determining hole) when the hour hand wheel 136 is assembled.
[0061]
The minute wheel 135 has 42 teeth for the large-diameter gear 135a and 10 teeth for the small-diameter gear 135b, and is pivotally supported with respect to the protrusion 111b formed on the lower case 111. The large-diameter gear 135a meshes with the small-diameter gear 134b formed on the minute hand pipe 134p, and the small-diameter gear 135b meshes with the hour hand wheel 136 (136a) to decelerate the rotation of the minute hand wheel 134 and to set the hour hand It is transmitted to the car 136.
[0062]
As shown in FIG. 2, the light detection sensor 140 includes a light emitting element 142 made of a light emitting diode attached to a circuit board 141 fixed to the wall surface of the upper case 12, and a lower case so as to face the light emitting element 142. And a light receiving element 144 made of a phototransistor attached to a circuit board 143 fixed to the wall surface of 111.
One end of the anode of the light emitting element 142 is a pnp transistor Q.₂Resistance element R in the drive circuit 18 connected to the collector of₄The cathode is grounded and connected to the emitter of the light receiving element 144.
The collector of the light receiving element 144 is connected to the control circuit 14. The connection line with this control circuit is connected to the detection signal DT.₁The output line to the control circuit 14 is connected to the resistance element R.₅Through the power supply voltage V_CCConnected to the supply line.
Transistor Q of drive circuit 18₂The emitter of the power supply voltage V_CCThe base is connected to the resistance element R₃Drive signal DR via₂Connected to the output line.
That is, the light emitting element 142 receives a low level drive signal DR from the control circuit 14.₂Is connected to the drive circuit 18 so that it emits light.
[0063]
As shown in FIG. 3, the first fifth wheel 122, second hand wheel 123, third wheel 133, minute hand wheel 134, and hour hand wheel 136 are all disposed at the same time in plan view. And the through-hole 122c of the 1st fifth wheel 122, the through-hole 133c of the third wheel 133, the through-hole 123c of the second hand wheel 123, the through-holes 134c (134d, 134e) of the minute hand wheel, and the through-hole 136c of the hour hand wheel 136. When (136d, 136e) overlap, the detection light emitted from the light emitting element 142 is received by the light receiving element 144, and it is output that the second hand, the minute hand, and the hour hand point to the position such as the hour. ing.
[0064]
Further, the light emitting element 142 is disposed in a mounting recess 112c as a first layout portion formed so as to open to the outside of the upper case 112, and a circular through hole having a predetermined diameter is formed on the bottom surface of the mounting recess 112c. A hole 112d is formed. The circular through-hole 112d has a property that the detection light emitted from the light emitting element 142 spreads in a divergent shape, and therefore, it is possible to prevent erroneous detection by blocking only the light that has converged by blocking the light of the spread. It is to make.
Similarly, the light receiving element 144 is disposed in an attachment recess 111c as a second arrangement portion formed so as to open to the outside of the lower case 111, and a circular shape having a predetermined diameter is formed on the bottom surface of the attachment recess 111c. A through hole 111d is opened. The circular through-hole 111d emits from the light-emitting element 142, and allows only light that has passed through the through-hole to pass as much as possible to prevent erroneous detection.
[0065]
When the first fifth wheel 122, the third wheel 133, the second hand wheel 123, the minute hand wheel 134, and the hour hand wheel 136 are assembled, predetermined positioning pins are used as the circular through hole 111d of the lower case 111 and the positioning, respectively. Are sequentially assembled so as to penetrate the through-holes and the circular through-hole 112d of the upper case 112. After the upper case 112 and the lower case 111 are joined and integrated, the positioning pin is pulled out, the light emitting element 142 is attached to the attachment recess 112c where the through hole 112d is located, and the attachment recess where the through hole 111d is located The light receiving element 144 is attached to 111c.
[0066]
Thereby, the through holes 112d and 111d are completely closed, and external light can be prevented from entering the internal space defined by the upper case 112 and the lower case 111. Therefore, it is possible to prevent erroneous detection due to the intrusion of external light, and since both the positioning hole at the time of assembly and the light detection through-hole are combined, compared to the case where these holes are provided separately. The apparatus can be consolidated and downsized.
[0067]
As shown in FIGS. 2 and 3, the manual correction system 150 includes a date wheel 135 that meshes with the small-diameter gear 134 b of the minute hand wheel 134 and the large-diameter gear 136 a of the hour hand wheel 136, and the reverse wheel 135 of this day. And a manual correction shaft 151 having a gear 151a meshing with the large-diameter gear 135a. The manual correction shaft 151 is positioned outside the upper case 112 so as to pass through a head 151b that can be directly touched by a user and an opening 112e that extends from the head 151b and is formed in the upper case 112. It consists of a columnar portion 151c that is pivotally supported with respect to a protrusion 111e formed on the lower case 111, and a gear 151a is formed in a lower region of the columnar portion 151c.
[0068]
The manual correction shaft 151 is configured to rotate in the same phase as the minute hand wheel 134, and when the minute hand wheel 134 is driven by the above-described second drive system 130, the minute hand wheel 134 via the minute wheel 135. When the second drive system 130 is not operating, the pointer position can be manually corrected by rotating the head 151b with a finger.
[0069]
As described above, the second hand shaft 123b of the second hand wheel 123 is inserted into the minute hand pipe 134p of the minute hand wheel 134, and the minute hand pipe 134p of the minute hand wheel 134 is inserted into the hour hand pipe 136p of the hour hand wheel 136. The minute hand wheel 134 and the hour hand wheel 136 have the same rotation center axis, and when the time is displayed, the second hand rotates once every 60 seconds, the minute hand rotates once every 60 minutes, and the hour hand moves. Driven to rotate once every 12 hours.
[0070]
As shown in FIG. 15, a groove serving as a first index for positioning extending at a predetermined width in the radial direction is formed at the tip of the minute hand pipe 134p of the minute hand wheel 134 and the tip of the hour hand pipe 136p of the hour hand wheel 136. 134 g and a groove 136 g as a second index are formed. The groove 134g and the groove 136g are set so as to indicate a predetermined time, for example, 12:00 when aligned.
[0071]
By providing such a positioning index, even if the minute hand wheel 134 and the hour hand wheel 136 are surrounded by the lower case 111 and the upper case 112 and covered, the grooves 134g and 136g can be preliminarily aligned. Since it can be seen that it indicates the approximate time that has been set, the minute hand and hour hand can be easily attached based on that state, eliminating the need for other alignment and position confirmation processes. Manufacturing time and inspection time can be shortened. Note that the positioning index is not limited to the above groove, but may be a mark such as a potch.
[0072]
Next, the operation according to the above configuration is centered on the time correction and display control operation at the time of forced reception in the control circuit 14 and the operation when a button correction command is received during reception or normal operation. 17 and FIG. 18 will be described.
[0073]
For example, when the reset / forced reception switch 12 is turned on by the user, the control circuit 14 returns the various states to the initial state and enters the forced correction mode (ST1). At this time, for example, the pointer is also stopped, and the calendar display including the year / month / day information displayed on the liquid crystal display panel 30 is initialized.
Then, “0:00” indicating that the pointer position is being detected is initially displayed on the liquid crystal display panel 30 (ST2), and the pointer position is detected (ST3).
When the pointer position is detected, the time of the stop position of the pointer is displayed on the liquid crystal display panel 30 instead of the initial display (ST4).
[0074]
At this time, when the reset / forced reception switch 12 is turned on, for example, drive power is supplied from the control circuit 14 to the standard radio wave signal receiving system 11, and the standard radio signal is forcibly received (ST5).
In the standard radio wave signal receiving system 11, a pulse signal S11 corresponding to the reception state is generated from the long wave receiving circuit 11b and output to the control circuit.
[0075]
In the control circuit 14, the pulse signal S11 indicating the reception state of the received standard radio wave signal is compared with a predetermined reference range.
As a result, when the reception state is within the reference range and the button correction mode is not set (ST6, ST7), the received radio wave signal is decoded as being receivable. As a result of decoding, when time can be set, count control of various counters is performed based on the basic clock by the oscillation circuit 13, and time information based on the received code is digitally displayed on the liquid crystal display panel 30 as calendar information. (ST8).
[0076]
Thus, after the time based on the received radio wave is digitally displayed, the fast-forward correction of the pointer for performing the analog display of the time is performed (ST9). In this fast-forward correction of the hands, the second hand stepping motor 121 and the hour / minute hand stepping motor 131 are rotationally driven in accordance with the value of the internal counter, and the hand position is corrected to the time position.
[0077]
As shown in FIG. 16, when the fast forward correction of the pointer is completed and the button correction mode is not set (ST10), the time counter is incremented in the control circuit 14 (ST11), and the normal correction mode for normal hand movement is performed. It is transferred to.
[0078]
In the normal correction mode, it is determined whether or not the reception time is set in advance (ST14), and the standard radio wave signal is received at the set time.
That is, driving power is supplied from the control circuit 14 to the standard radio signal reception system 11 and a standard radio signal is received.
In the standard radio wave signal receiving system 11, a pulse signal S11 corresponding to the reception state is generated from the long wave receiving circuit 11b and output to the control circuit.
Then, the control circuit 14 compares the pulse signal S11 indicating the reception state of the received standard radio signal with a predetermined reference range.
As a result, when the reception state is within the reference range and the button correction mode is not set (ST15, ST16), it is assumed that reception is possible, and it is possible to set the time as a result of decoding by decoding the received radio signal. The count control of various counters is performed based on the basic clock by the oscillation circuit 13, and the time information based on the received code is digitally displayed as calendar information on the liquid crystal display panel 30 and the pointer for performing analog display of the time. The fast-forward correction is performed (ST17), and the process returns to step ST11.
[0079]
In step ST7, when it is determined that reception is possible, initial display is performed instead of calendar information including time information based on the received signal (ST18).
At this time, the time of the pointer is not corrected, and the drive signal DR₁Is output to the drive circuit 15 at a high level. Thereby, the light emitting element 16 as a notification means emits light, and the user is notified that radio wave reception is not good.
Then, the process proceeds to step ST10.
[0080]
In step ST6, step ST10, or step ST15, when the correction switch 21 is turned on to shift to the button correction mode, control as shown in FIG. 18 is performed (ST19).
That is, if the correction digit is not determined, the digit to be corrected on the liquid crystal display panel 30 is blinked (ST1901, ST1902).
Here, when the correction switch 21 is turned off (ST1903), if the up switch 23 is turned on (ST1904), step feed is first performed (ST1905).
If the up switch 23 is pressed for 2 seconds or more (ST1906, ST1907), fast forwarding is performed (ST1908, ST1909), the corresponding digit is corrected, and the process returns to step ST1904.
[0081]
If it is determined in step ST1904 that the up switch 23 is not turned on and the down switch 24 is turned on (ST1910), the process first returns to step (ST1911).
If the down switch 24 is pressed for 2 seconds or more (ST1912, ST1913), fast reverse is performed (ST1914, ST1915), the corresponding digit is corrected, and the process returns to step ST1910.
[0082]
In step ST1910, when it is determined that the down switch 24 is not turned on and the preset automatic release time has elapsed with the correction switch 21 not turned on (ST1917), the corrected time is displayed on the liquid crystal display panel 30. Digitally displayed (ST1918).
Then, the pointer fast-forward correction similar to that in step ST9 is performed (ST1919). If the correction switch 21 is not turned on (ST1920), the correction time information and calendar information such as year, month, day of the week, etc. are displayed in a calendar (ST1921). ). As described above, the control circuit 14 accepts the button correction again during the fast-forwarding of the pointer after the button correction (following) (ST1920).
Thereafter, the process proceeds to step ST11 shown in FIG.
[0083]
The position of the pointer is detected as shown in FIG.
That is, the drive signal DR from the control circuit 14₂Is output at the low level of the drive circuit 18. Thereby, the transistor Q₂Is turned on, and detection light is emitted from the light emitting element 142, that is, the light emitting diode (ST901).
Subsequently, the control signal CTL₁Is output, the second hand stepping motor 121 is pulse-driven (ST902), the light receiving element 44, that is, the phototransistor is turned on, and the detection signal DT₁Is at high level (power supply voltage V_CCIt is determined whether or not the level has been switched from low to low (ST903).
[0084]
Here, the detection signal DT from the phototransistor₁Is held at a high level, the detection signal DT from the phototransistor is added each time the number of pulses for performing step driving is added.₁Is at high level (power supply voltage V_CCIt is determined whether or not the level has been switched from low to low (ST904 to ST906).
Even when the number of pulses reaches 9, the detection signal DT from the phototransistor₁Output is high level (power supply voltage V_CCIf the level does not switch to the low level, the hour / minute hand stepping motor 131 is driven by one step (pulse) (ST907), and then the second hand stepping motor 121 is stepped again (ST902) and the second hand wheel 123 is driven. Is driven to rotate.
[0085]
On the other hand, in step ST903, the detection signal DT by the phototransistor₁If it is determined that has switched from the high level to the low level, the second hand wheel 123 is fast-forwarded (ST908), and the control circuit 14 compares the output pattern stored in advance (ST909).
As a result of the comparison, if the obtained output pattern does not match the stored output pattern, the process returns to step ST908, and the second hand wheel 123 is fast-forwarded again.
[0086]
On the other hand, if the obtained output pattern matches the stored output pattern, the detection signal DT is detected by the phototransistor at that time (even in the fifth step).₁When the output of the phototransistor is next switched to the low level when the level of the signal does not switch to the low level), the control signal CTL₁Is stopped, and the circuit drive of the second hand wheel 123 is stopped. Then, the second hand wheel 123 stops at the return zero position (ST910). At this time, the second hand is corrected to a position at a predetermined time, for example, the hour (0 second).
[0087]
Subsequently, the control signal CTL is sent from the control circuit 14.₂Is output and only the hour / minute hand step motor 131 is pulse-driven at a predetermined output frequency, and the minute hand wheel 134 is fast-forwarded (ST911).
Then, the output pattern from the phototransistor is compared with the output pattern stored in advance in the control circuit 14 (ST912).
As a result of the comparison, if the obtained output pattern does not match the stored output pattern, the process returns to step ST911 and the minute hand wheel 134 is fast-forwarded again.
[0088]
On the other hand, when the obtained output pattern matches the stored output pattern as a result of the comparison in step ST912, at that time, the control signal CTL₂Is stopped, the hour / minute hand stepping motor 131 is stopped, and the driving of the minute hand wheel 134 and the hour hand wheel 136 is stopped (ST913).
[0089]
Here, the time correction by comparing the output pattern with a previously stored pattern is performed by matching with any of the three types of patterns.
That is, as shown in FIG. 19A, the output pattern of the phototransistor by the minute hand wheel 134 has two narrow B portions and one wide A portion alternately as the off-width where the light shielding portion acts. As shown in FIG. 19B, the output pattern of the phototransistor by the hour hand wheel 136 has three different widths D portion, E portion, and C portion where the light shielding portion acts. Is a pattern that appears alternately at a predetermined interval. As shown in FIG. 19C, an output pattern obtained by combining the two is a pattern in which the D portion, the B portion, and the A portion are combined, and the E portion, Three types of patterns, which are a combination of the B and A portions and a combination of the C, B, and A portions, appear at predetermined intervals.
In the pattern shown in FIG. 19, the part of the pattern that is turned on is actually a part that is turned off by the light shielding part of the third wheel & pinion 133, and is a tooth-missing pattern.
[0090]
Therefore, when a pattern consisting of a combination of D part, B part and A part is confirmed, for example, 4:00, for example, when a pattern consisting of a combination of E part, B part and A part is confirmed, for example, 8:00 If a pattern consisting of a combination of part C, part B and part A is confirmed at 00 minutes in advance, for example, as 12:00, it will be used for the hour and minute hands when any of these patterns is detected. By stopping the stepping motor 131, the minute hand wheel 134 and the hour hand wheel 136, that is, the minute hand 203 and the hour hand 204 can be adjusted to a predetermined time.
[0091]
After the hour / minute hand stepping motor 131 is stopped, the drive signal DR by the control circuit 14 is displayed.₂Is switched to high level.
Thus, the transistor Q of the drive circuit 18₂Is turned off, the light emission of the light emitting diode is stopped (ST914), and the time adjustment operation is terminated.
[0092]
Thus, in the correction operation of the pointer, since the arc-shaped through hole, that is, the long hole is used as the through hole for allowing the detection light to pass through the minute hand wheel 134 and the hour hand wheel 136, the light detection sensor 140 is turned on. As a result, the position detection time can be shortened, and as a result, the time for correcting the time of the second hand can be shortened. Further, since the hour hand wheel 136 is provided with three types of light-shielding portions C, D, and E, the time can be adjusted by detecting any one of the three locations, and the hour hand wheel 136 having the slowest rotation speed can be adjusted. The position can be detected only by rotating approximately 1/3 as compared with the prior art, and the time for correcting the time of the minute hand 203 and the hour hand 204 can be shortened.
[0093]
As described above, according to the present embodiment, when digital display control is performed, a specific initial value, for example, “0:00” is displayed during initial pointer position detection, and after position detection and during reception. The time of the pointer stop position is displayed, the received data is displayed when reception is completed, the needle performs fast-forward correction, button correction is accepted during reception or normal operation, and the up switch 23 is received during time correction. Or the control signal CTL at the moment when the down switch 24 is operated (in the case of a push button, when the button is pressed).₁, CTL₂The control circuit 14 is provided to stop the output of the needle, stop the pointer at that position, display the stop time, correct the time by digital display and cancel the correction mode, and then fast-forward the pointer to follow the digital display. Further, there is an advantage that the current operation such as the position of the pointer and reception can be confirmed at the time correction, and the correction time can be displayed in a short time.
[0094]
【The invention's effect】
As described above, according to the present invention, there is an advantage that the current operation such as the hand position and reception can be confirmed at the time correction, and the correction time can be displayed in a short time.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an embodiment of a signal processing system circuit of a radio-controlled timepiece according to the present invention.
FIG. 2 is a cross-sectional view showing the overall configuration of an embodiment of a pointer position detection device for a radio-controlled timepiece according to the present invention.
FIG. 3 is a plan view of a main part of the pointer position detection device according to the present invention.
4 is a front view showing an appearance of the radio-controlled timepiece of FIG. 1. FIG.
FIG. 5 is a diagram for explaining a criterion for determining a received radio wave state before a zero return operation in an initial correction mode in a control circuit according to the present invention.
FIG. 6 is a diagram illustrating an example of a time code of a standard time radio signal.
FIG. 7 is a plan view showing a first drive system for driving a second hand which is a part of an automatic correction timepiece.
FIG. 8 is a plan view showing a second drive system that drives a minute hand and an hour hand that are part of an automatic correction timepiece.
FIG. 9 is a plan view showing a first fifth wheel and a part of a first drive system that drives a second hand.
FIG. 10 is a plan view showing a second hand wheel that forms part of a first drive system that drives the second hand.
FIG. 11 is a plan view showing another example of a second hand wheel that forms part of the first drive system that drives the second hand.
FIG. 12 is a plan view showing a third wheel & pinion that forms part of a second drive system that drives the minute hand and hour hand.
FIG. 13 is a plan view showing a minute hand wheel forming a part of a second drive system for driving the minute hand and the hour hand.
FIG. 14 is a plan view showing an hour hand wheel forming a part of a second drive system for driving the minute hand and the hour hand.
FIG. 15 is an end view showing the tip portions of the minute hand pipe and the hour hand pipe.
FIG. 16 is a flowchart for explaining the time correction and display control operation at the time of forced reception in the control circuit of the radio-controlled timepiece according to the present invention.
FIG. 17 is a flowchart for explaining a pointer position correcting operation in the control circuit of the radio-controlled timepiece according to the present invention.
FIG. 18 is a flowchart for explaining the operation in the button correction mode in the control circuit of the radio-controlled timepiece according to the present invention.
FIG. 19 is a diagram showing an output pattern of a minute hand wheel, an hour hand wheel, and detection means based on a combination of both in a correction operation;
[Explanation of symbols]
10: Signal processing system circuit
11 ... Standard radio signal reception system
12 ... Reset switch
13 ... Oscillator circuit
14 ... Control circuit
15 ... Drive circuit
16: Light-emitting element as notification means
17 ... Buffer circuit
18 ... Drive circuit
20 ... Correction switch group
21 ... Correction switch
22 ... Display selector switch
23 ... Up switch
24 ... Down switch
100 ... clock body
111 ... lower case (second case)
111c ... Mounting recess (second arrangement portion)
111d ... circular through hole
112 ... Upper case (first case)
112c ... Mounting recess (first arrangement portion)
112d-circular through hole
113 ... Middle plate
120 ... 1st drive system
121... Second hand stepping motor (first drive source)
122 ... 1st fifth wheel (first transmission gear, first detection gear)
122c ... Through hole
123 ... Second hand wheel (second detection gear, first pointer wheel)
123c ... Through hole
123d: Positioning light shielding part
123e ... Biasing spring
123f ... Notch hole
123g ... Notch hole
130: Second drive system
131 ... minute hand system stepping motor (second drive source)
132 ... No. 5 car
133 ... 3rd wheel (second transmission gear, third detection gear)
133c ... Through hole
134 ... minute hand wheel (fourth detection gear, second pointer wheel)
134c ... Arc-shaped through-hole
134d ... Arc-shaped through-hole
134e ... Arc-shaped through-hole
134g ... Groove (first index)
134p ... minute hand pipe
135 ... the back of the sun
136 ... hour hand wheel (fifth detection gear, second pointer wheel)
136c ... Arc-shaped through-hole
136d ... Arc-shaped through-hole
136e ... Arc-shaped through-hole
136g ... Groove (second index)
136p ... hour hand pipe
140... Light detection sensor (detection means)
142... Light emitting element
144. Light receiving element
150 ... Manual correction system
V_CC…Power-supply voltage
C₁~ C₃... Capacitors
R₁~ R₅... Resistance element

Claims (4)

An automatic correction clock that performs analog time display by hands and digital time display by display means, and corrects the display time by receiving a time code,
Pointer driving means for driving the pointer according to the control signal;
When the time code is received, the time information corrected according to the input time code is digitally displayed on the display means, and then the control signal is output to the pointer driving means to correct the pointer position at the time according to the input time code. and control means for,
A pointer position detecting means capable of detecting a pointer position in response to a drive signal;
While the time code is being received, the control means stops the pointer driving means by the control signal, digitally displays information indicating that the pointer position is being detected on the display means, and detects the pointer position. The driving signal is output to the means to detect the pointer position, and at least one of the time code reception and the time code detection is completed, the time of the pointer stop position is digitally displayed on the display means. An automatic correction timepiece that displays and digitally displays time information corresponding to the input time code when the determination of the time code is completed . A correction switch for correcting the display information of the display means;
The control means accepts an interruption by the correction switch during at least one of reception of the time code and normal hand movement, and when the correction switch is operated, a pointer is indicated to the pointer driving means by the control signal. Stop and display the stop time digitally on the display means. After the time adjustment by digital display is completed, the control signal is output to the pointer drive means to correct the pointer position to the time position according to the corrected time. let <br/> automatic timepiece according to claim 1, wherein. The automatic correction timepiece according to claim 1 or 2 , wherein the control means causes the correction of the pointer position to be performed by fast-forwarding . The control means decodes the received time code and corrects it to the decoded time when the time can be changed, and does not adjust the time when the time cannot be changed. 1, 2, or 3 automatic correction clock.

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