JP2005024319A - Electric wave correcting time piece - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric wave correcting time piece capable of showing a reception frequency without installing separately a display device when performing time correction by receiving selectively a standard time electric wave signal having a different frequency, and driving a second hand in the operation form fit to user's liking. <P>SOLUTION: This clock is provided with a second hand driving system 120 for driving the second hand in the set operation form, an hour minute hand driving system 130 for driving hour minute hands, a standard electric wave receiving system 11 for receiving selectively the standard time electric wave signal having the different frequency, and a control circuit 14 for setting the operation form of the second hand based on the received frequency of the standard time electric wave signal received by the standard electric wave receiving system 11, and allowing a motor 121 for the second hand in the second hand driving system 120 to operate the second hand in the set operation form by applying a driving pulse signal having a pulse interval corresponding to the operation form. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【００５５】
制御回路１４は、例えば数式（２）に示すように合計数Ｘと合計数Ｚに基いて評価値Ａを算出する。
【００５６】
【数２】

【００５７】
制御回路１４は、図９（ａ）に示すようにロウレベルを０、ハイレベルを１とした場合に、８秒間の同一タイミング毎に合計して、合計数ｂ０〜ｂ３１を生成し、タイミング毎のレベルの変化を評価する。合計数ｂ０〜ｂ３１を単に合計数ｂとも言う。
【００５８】
制御回路１４は、例えば図９（ａ）に示すような場合に、合計数ｂ０〜ｂ３１それぞれは、５，６，８，８，８，８，８，８，０，０，０，０，０，０，１，１，１，１，１，１，１，１，１，４，５，５，５，５，５，５，５，５とする。
【００５９】
制御回路１４は、合計数ｂに基づいて、ロウレベル“Ｌ（０）“の安定度ＳＬを生成する。
制御回路１４は、例えば図９（ｃ）に示すように、合計数ｂ１〜ｂ３１のうち０が５個以上連続している場合には安定度ＳＬを０と設定する。上記以外の場合であって１以下が５個以上連続する場合には安定度ＳＬを１と設定する。上記以外の場合であって２以下が５個以上連続する場合には安定度ＳＬを２と設定する。上記のいずれの条件にも相当しない場合には安定度ＳＬを７と設定する。
【００６０】
制御回路１４は、例えば図９（ｃ）に示すように、合計数ｂに基づいて、ハイレベル“Ｈ（１）“の安定度ＳＨを生成する。詳細には、制御回路１４は、例えば図９（ｃ）に示すように、合計数ｂ１〜ｂ３１のうち８が５個以上連続している場合には安定度ＳＨを０と設定する。上記以外の場合であって６以下が５個以上連続する場合には安定度ＳＨを１と設定する。上記以外の場合であって４以下が５個以上連続する場合には安定度ＳＨを２と設定する。上記のいずれの条件にも相当しない場合には安定度ＳＨを７と設定する。
【００６１】
制御回路１４は、これら安定度ＳＬおよび安定度ＳＨに基いて評価値Ｂを生成する。例えば制御回路１４は、数式（３）に示すように安定度ＳＬと安定度ＳＨを加算して評価値Ｂを生成する。
【００６２】
【数３】
評価値Ｂ＝安定度ＳＬ＋安定度ＳＨ …（３）
【００６３】
評価値Ｂは、受信信号の安定度を示す指標であり、小さいほど安定している状態を示す。
制御回路１４は、図９（ａ）に示したような場合には、安定度ＳＬが０、安定度ＳＨが０であるから、評価値Ｂは０である。
【００６４】
制御回路１４は、評価値Ａおよび評価値Ｂに基いて、受信信号の受信状態を示す評価値Ｃを生成する。例えば、制御回路１４は、数式（４）に示すように、評価値Ａおよび評価値Ｂを加算して評価値Ｃを生成する。評価値Ｃは小さいほど受信状態が良好であることを示す。
【００６５】
【数４】
評価値Ｃ＝評価値Ａ＋評価値Ｂ…（４）
【００６６】
図９（ａ）に示すような場合には、制御回路１４は、評価値Ａが０、評価値Ｂが０であるから、評価値Ｃは０であり、受信状態が極めて良好であると判別する。
【００６７】
制御回路１４は、例えば評価値Ｃが所定の値、例えば２よりも小さい場合には、極めて良好な受信状態であると判別し、評価したその受信周波数で受信するように長波受信回路１１０の受信周波数を設定する。
【００６８】
制御回路１４は、評価値Ｃが所定の値より大きい場合には、異なる周波数の標準電波をサンプリングして受信状態を評価し、異なる周波数の標準電波の受信状態を示す評価値Ｃと比較し、小さい方の評価値Ｃの周波数の標準電波を受信するような制御信号ＣＴＬ１１３を出力して標準電波受信系１１の受信周波数を設定する。
制御回路１４は、その設定された受信周波数で受信された標準電波時刻信号に基いて、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内部時計１４０１の各種カウンタのカウント制御を行う。
【００６９】
制御回路１４は、受信状態が基準範囲にない場合には、制御信号ＣＴＬ１を出力せずに、ドライブ信号ＤＲ１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に標準電波信号がほとんど受信できない旨を報知させる。
【００７０】
制御回路１４は、受信された標準時刻情報に基づいて、内部時計１４０１の各種時刻カウンタで計時されている時刻情報と標準時刻情報とを比較し、誤差が生じている場合には、その誤差に応じて時刻カウンタを修正し、その修正に応じて時分針用モータ１３１に制御信号ＣＴＬ２として、修正のためのパルス信号Ｐを入力して早送り駆動等を行い、指針による時刻表示の修正を行う。
【００７１】
ドライブ回路１５は、ｐｎｐ型トランジスタＱ１および抵抗Ｒ１，Ｒ２を有する。
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、例えば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。発光素子１６のカソードは接地されている。
発光素子１６は、制御回路１４から一定の間隔で出力されたドライブ信号ＤＲ１に応じて点滅を行う。
【００７２】
ドライブ回路１８は、光透過型光検出センサ１４０のドライブ回路であり、例えばｐｎｐ型トランジスタＱ２、および抵抗素子Ｒ３，Ｒ４を有する。
トランジスタＱ２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Ｒ３を介して制御回路１４のドライブ信号ＤＲ２の出力ラインに接続され、コレクタは抵抗素子Ｒ４を介して光透過型光検出センサ１４０に接続されている。
ドライブ回路１８は、制御回路１４からドライブ信号ＤＲ２が出力された場合に、光透過型光検出センサ１４０に電力を供給する。
【００７３】
光透過型光検出センサ１４０は、図３に示すように、例えば下ケース１１１に取り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、上ケース１１２に取り付けられたフォトトランジスタからなる受光素子１４４とを有する。
【００７４】
また、図２，３に示すように、６番車１２６、秒針車１２３、３番車１３３、分針車１３４、および時針車１３６の全てが同時に重なる位置に配置されている。そして、６番車１２６の長孔、秒針車１２３の長孔、３番車１３３の長孔、分針車１３４の長孔、および時針車の長孔が重なり合ったときに、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、光透過型光検出センサ１４０がＯＮ状態になる。
制御回路１４は、この光透過型光検出センサ１４０の状態に応じて指針の位置検出を行う。
【００７５】
発光素子１４２のアノードは一端がｐｎｐ型トランジスタＱ２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Ｒ４の他端に接続され、カソードは接地されると共に、受光素子１４４のエミッタに接続されている。
【００７６】
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１４との接続ラインは検出信号ＤＴ１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Ｒ５を介して電源電圧Ｖ_ＣＣの供給ラインに接続されている。
発光素子１４２は、制御回路１４からロウレベルのドライブ信号ＤＲ２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。
【００７７】
次に、電波修正時計１のムーブメントおよび指針位置検出系の具体的な構成について、図２，３に関連付けて説明する。
時計本体１００は、図２，３に示すように、互いに対向して接続されて輪郭を形成する下ケース１１１、上ケース１１２、ならびに、下ケース１１１および上ケース１１２で形成される空間内において下ケース１１１と連結した状態で配置される中板１１３を有する。
【００７８】
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指針である秒針を駆動するための第１駆動系、すなわち秒針駆動系１２０と、第２の指針である時分針を駆動するための第２の駆動系、すなわち時分針駆動系１３０と、光透過型光検出センサ１４０と、手動で時刻を修正するための手動修正系１５０となどが固定あるいは軸支されている。
【００７９】
秒針駆動系１２０は、前述したように、ステータ１２１ａと、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と、ステータ１２１ａの他方の磁極間において回転自在に軸しされたロータ１２１ｃにより構成されている秒針用モータ１２１と、ロータ１２１ｃのピニオン１２１ｄに噛合する７番車１２７と、この７番車１２７に噛合した第１の検出用歯車（第１伝達歯車）としての６番車１２６と、この６番車１２６に噛合する中間車としての第１の５番車１２２と、この第１の５番車１２２に噛合した第２の検出用歯車としての秒針車１２３とにより構成されている。
【００８０】
ここで、秒針用モータ１２１は、制御回路１４から出力されたコントロール信号ＣＴＬ１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。なお、本実施形態においては、駆動系の動きを考える際の最小単位として、制御回路１４がモータ１２１，１３１をパルス駆動するために１回パルス信号を発振することを１ステップと呼ぶことにする。ステップ間の間隔の実際の長さは通常運針時と時刻修正時の早送りの際では異なり、また、秒針駆動系と時分針駆動系においても異なる。
【００８１】
連続運針においては、秒針、すなわち秒針が取り付けられる秒針車１２３を滑らかに動かすために、ロータ１２１ｃから秒針車１２３までの減速比を大きくする必要がある。そのため、本実施形態においては、第１検出用歯車である６番車１２６と第２検出用歯車である秒針車１２３の間に、中間車として第１の５番車１２２を噛合させ減速比を稼いでいる。ちなみに本実施形態においては、６番車は４０ステップ／回転、秒針車は９６０ステップ／回転であって、ロータ１２１ｃから秒針車１２３までの減速比は１／４８０である。
本実施形態においては秒針の基準位置検出には６番車１２６と秒針車１２３に設けられた透過部および遮光部を利用する。
【００８２】
秒針すなわち秒針車１２３の基準位置は、６番車１２６と、秒針車１２３のみを使用して求める。その方法は、６番車１２６と秒針車１２３の長孔同士が重なり合う部分のある１点に注目してそこで位置検出用の検出用の検出光を検出すると考え、６番車１２６と秒針車１２３の長孔と遮光部によって生じる光検出センサのＯＮ，ＯＦＦのパターンを判別することにより基準位置を検出する。
【００８３】
第２駆動系である時分針駆動系１３０は、図２，３に示すように、略コの字型のステータ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転自在に軸支されたロータ１３１ｃにより構成されてる時分針用モータ１３１と、ロータ１３１ｃのピニオン１３１ｄに噛合する中間車としての第２の５番車１３２と、この第２の５番車１３２に噛合した第３検出用歯車（第２伝達歯車）としての３番車１３３と、この３番車１３３に噛合する第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に噛合した中間車としての日の裏車１３５と、この日の裏車１３５に噛合する第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。
【００８４】
ここで、時分針用モータ１３１は、制御回路１４から出力される制御信号ＣＴＬ２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。
３番車１３３には、半径方向に所定の幅を有し、円周方向にそれぞれ所定の長さだけ伸びている３個の円弧状の長孔と、それぞれの長孔同士の間の部分である遮光部が、３番車１３３の回転軸を中心とした同心円状に交互に配置されている。
【００８５】
分針車１３４には、半径方向に所定の幅を有し、円周方向にそれぞれ所定の長さだけ伸びている３個の円弧状の長孔と、それぞれ長孔同士の間の部分である遮光部が、分針車１３４の回転軸を中心とした同心円状に交互に配置されている。
【００８６】
時針車１３６には、半径方向に所定の幅を有し、円周方向にそれぞれ所定の長さだけ伸びている３個の円弧状の長孔と、それぞれ長孔同士の間の部分である遮光部が時針車１３６の回転軸を中心とした同心円状に交互に配置されている。
【００８７】
本実施形態においては、３番車１３３に、基準位置検出用の透過部として３つの長孔を設けている。秒針車１２３の場合と同様に、基準位置決定のために、３番車１３３と分針車１３４の長孔と遮光部によって生じる光検出センサのＯＮ，ＯＦＦパターンを区別して、そのパターンに応じて分針の基準位置例えば０分や、時針の基準位置例えば０時を指す位置を検出する。
【００８８】
手動修正系１５０は、上述の分針車１３４および時針車１３６に噛合する日の裏車１３５と、この日の裏車１３５に噛合する手動修正軸１５１とにより構成される。手動修正軸１５１は上ケース１１２の外部に位置づけられて使用者が直接指を触れることのできる頭部１５１ｂを有している。
この手動修正軸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、上述の時分針駆動系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と同位相で回転すると共に、時分針駆動系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。
【００８９】
図１０は、図１に示した電波修正時計の動作を説明するためのフローチャートである。電波修正時計１の動作を図１０を参照しながら、制御回路１４の受信周波数の評価、および受信周波数の決定に関する動作を中心に説明する。
【００９０】
ステップＳＴ１において、制御回路１４では、例えば初期設定として、周波数４０ｋＨｚの標準電波を受信させる制御信号ＣＴＬ１１３を切換部１１３に出力して４０ｋＨｚ受信回路１１１を活性化させて信号Ｓ１１１を受信する。
【００９１】
ステップＳＴ２において、制御回路１４では、周波数選択および秒同期を含め、受信開始より３分以上経過したか否かが判別され、３分以上経過したと判別された場合には、受信周波数を確定せず（ＳＴ３）、一時受信周波数を４０ｋＨｚに設定し（ＳＴ４）、受信周波数の選択に係る処理を終了する。
【００９２】
一方、ステップＳＴ２において、制御回路１４では、長波受信回路１１０からの出力の安定待ちを行い、詳細には受信開始から５秒間経過した場合には（ＳＴ５）、標準電波を８秒間受信してサンプリングを行う（ＳＴ６）。
ステップＳＴ７において、制御回路１４では１秒毎のエッジｅｄ（両エッジ）を計測し、エッジｅｄのない秒を計測し（ＳＴ８）、図９に示したように、上記計数に基づいて評価値Ａを生成する（ＳＴ９）。
【００９３】
ステップＳＴ１０において、制御回路１４では、サンプリングタイミング毎のレベルの計測が行われ、図９に示したように”Ｌ”レベルの安定度ＳＬを評価し（ＳＴ１１）、”Ｈ”レベルの安定度ＳＨを評価し（ＳＴ１２）、上記判定結果より評価値Ｂを算出する（ＳＴ１３）。
ステップＳＴ１４において、制御回路１４では、以前の評価値Ａをメモリ１４０２に保存し、最新の評価値Ｃを算出する（ＳＴ１５）。
【００９４】
ステップＳＴ１６において、制御回路１４では、最初の受信であるか否かが判別される。最初の受信であると判別された場合には、評価値が２以下か否かが判別され（ＳＴ１７）、今回の周波数を受信用の周波数に設定し（ＳＴ１８）、秒同期処理へ進む（ＳＴ１９）。
【００９５】
一方、ステップＳＴ１７の判別において、評価値Ｃが２以上、つまり２よりも大きい場合には、標準電波の受信周波数を切換える。例えば、４０ｋＨｚから６０ｋＨｚに受信周波数を切換える制御信号ＣＴＬ１１３を標準電波受信系１１に出力して受信周波数を切換え（ＳＴ２０）、ステップＳＴ２の処理に戻り、切換えられた周波数で同様な処理を行う。
【００９６】
一方、ステップＳＴ１６の判別において、最初の受信ではないと判別された場合には、今回の評価値Ｃと前回の評価値Ｃとが比較され（ＳＴ２１）、比較の結果、異なる場合には、今回の評価値Ｃの方が前回の評価値Ｃよりも大きいか否かが判別され（ＳＴ２２）、今回の評価値Ｃが大きいと判別された場合には、ステップＳＴ１８の処理に進む。
【００９７】
一方、ステップＳＴ２２の判別において、今回の評価値Ｃの方が前回の評価値Ｃよりも小さいと判別された場合には、前回の周波数に確定され（ＳＴ２３）、ステップＳＴ１９の秒同期処理に進む。
一方、ステップＳＴ２１の判別において、今回の評価値Ｃと前回の評価値Ｃが一致する場合には、評価値が１５であるか否かが判別され（ＳＴ２４）、評価値が１５であると判別された場合には、受信状態が良くないと判別し、ステップＳＴ２０の処理に移行する。
【００９８】
一方、ステップＳＴ２４の判別において、評価値が１５ではないと判別された場合には、受信状態が良くないと判別し、ステップＳＴ１８の処理に移行する。
【００９９】
制御回路１４は、受信周波数が確定すると確定フラグをセットし、受信周波数の確定後、２４時間正常に受信できない場合には、確定フラグをクリアして再度、受信周波数の上述した選択処理を行う。
【０１００】
制御回路１４では、確定した受信周波数の標準電波信号に基づいて、例えば図９（ａ）に示したように、例えば、１１１１１１００００００となるパターンを検出し、その１から０への立下りエッジｅｄ１の時が、標準電波信号のゼロ点として、内部時計１４０１の秒同期処理を行う。
その後、制御回路１４は、分同期処理、時刻コード解析処理等を行い、標準時刻に応じて制御信号ＣＴＬ１，ＣＴＬ２をモータ１２１，１３１に出力し、早送り動作を行い、指針を標準時刻に設定する。
【０１０１】
図１１は、図１に示した電波修正時計の動作を説明するためのフローチャートである。図１１を参照しながら、受信周波数に応じた運針形態で秒針を運針させる際の動作を説明する。
【０１０２】
ステップＳＴ３１において、制御回路１４では、上述したように複数の異なる周波数の標準時刻電波信号の受信状態に基づいて、内部時計１４０１が計時する時刻情報を修正するための標準時刻電波信号の受信周波数を選択し、標準電波受信系１１に選択した受信周波数の標準時刻電波信号を受信させる。
【０１０３】
ステップＳＴ３２において、制御回路１４は、選択した標準時刻電波信号の受信周波数に基づいて運針形態を設定し、設定された運針形態に応じたパルス間隔の駆動パルス信号Ｐを秒針用モータ１２１に信号ＣＴＬ１として印加する。
詳細には、例えば制御回路１４は、選択した受信周波数が６０ｋＨｚの場合には運針形態として連続運針を設定し、図８（ａ），（ｂ）に示すように、秒針用モータ１２１に等間隔で駆動パルス信号Ｐを信号ＣＴＬ１として印加して秒針を連続運針させる。
【０１０４】
一方、ステップＳＴ３３において、制御回路１４は、例えば選択した受信周波数が４０ｋＨｚの場合には運針形態として擬似ステップ運針を設定し、図８（ｃ），（ｄ）に示すように、１秒間の前半の５００ｍｓに１６個のハイレベルの駆動パルス信号Ｐを印加し、１秒間の後半の期間ではハイレベルの駆動パルス信号Ｐを印加しない信号ＣＴＬ１を秒針用モータ１２１に入力して、秒針を擬似ステップ運針させる。
【０１０５】
制御回路１４は、運針切替スイッチ１２０２が操作された場合には、例えば連続運針から擬似ステップ運針に切替え、または逆に擬似ステップ運針から連続運針に切替える。また、他の運針形態に切替えてもよい。
【０１０６】
図１２は、図１に示した電波修正時計の指針位置検出処理を示すフローチャートである。図１２を参照しながら指針位置検出処理を説明する。
制御回路１４から時分用パルス信号出力パターンがセットされ（ＳＴ１０１）、ドライブ信号ＤＲ２がドライブ回路１８にロウレベルで出力される。これにより、トランジスタＱ２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。
【０１０７】
続いて、制御回路１４から制御信号ＣＴＬ１が出力されて秒針用モータ１２１がパルス駆動され（ＳＴ１０２）、受光素子１４４すなわちフォトトランジスタがオンし、検出信号ＤＴ１がハイレベル（電源電圧Ｖ_ｃｃレベル）からロウレベルに切り換わったか否かの判別が行われる（ＳＴ１０３）。
【０１０８】
ここで、フォトトランジスタからの検出信号ＤＴ１がハイレベルのままに保持されている場合には、ステップ駆動を行うために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ＤＴ１がハイレベル（電源電圧Ｖ_ｃｃレベル）からロウレベルに切り換わったか否かの判別が行われる（ＳＴ１０４〜ＳＴ１０６）。
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ＤＴ１出力がハイレベル（電源電圧Ｖ_ｃｃレベル）からロウレベルに切り換わらない場合には、時分針用モータ１３１が１ステップ（パルス）駆動され（ＳＴ１０７）、その後再び秒針用モータ１２１がステップ駆動され（ＳＴ１０２）て、秒針車１２３が回転駆動される。
【０１０９】
一方、ステップＳＴ１０３において、フォトトランジスタによる検出信号ＤＴ１がハイレベルからロウレベルに切り換わったと判別されると、秒針車１２３が早送りされ（ＳＴ１０８）、制御回路１４に予め記憶された出力パターンとの比較が行われる（ＳＴ１０９）。
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ＳＴ１０８に戻り、再び秒針車１２３が早送りされる。
【０１１０】
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ＤＴ１のレベルがロウ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ウレベルに切り換わった時点）で、制御信号ＣＴＬ１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（ＳＴ１１０）。このとき、秒針は所定時刻例えば正時（０秒）の位置に修正され、秒針の原点検索処理が終了する。
【０１１１】
続いて、制御回路１４から制御信号ＣＴＬ２が出力されて時分針用モータ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（ＳＴ１１１）。
【０１１２】
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に予め記憶された出力パターンとの比較が行われる（ＳＴ１１２）。
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ＳＴ１１１の処理に戻り、再び分針車１３４が早送りされる。
【０１１３】
一方、ステップＳＴ１１２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ＣＴＬ２の出力が停止されて、時分針用モータ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（ＳＴ１１３）。
【０１１４】
ここで、出力パターンと予め記憶された出力パターンとの比較による時分針車の位置検出処理は、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。
【０１１５】
図１３は、図１に示した電波修正時計の検出光の出力パターンを説明するための図である。
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１３（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１３（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１３（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種類が所定の間隔をおいて現れるパターンとなる。
なお、図１３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。
【０１１６】
また、例えば分針車１３４および時針車１３６の基準位置として、図１３に示すように、０時００分、４時００分、および８時００分の位置に設定されている。
【０１１７】
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分として予め設定しておけば、これらのパターンのいずれかを検出したときに、時分針用モータ１３１を停止させることで、分針車１３４および時針車１３６すなわち分針および時針を所定の時刻に時刻修正することができる。
【０１１８】
そして、時分針用モータ１３１を停止させた後、制御回路１４によるドライブ信号ＤＲ２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Ｑ２がオフし、発光ダイオードの発光が停止される（ＳＴ１１４）。
【０１１９】
以上説明したように、設定された運針形態をもって秒針を駆動する秒針駆動系１２０と、時分針を駆動する時分針駆動系１３０と、複数の異なる周波数の標準時刻電波信号を選択的に受信する標準電波受信系１１と、標準電波受信系１１が受信した標準時刻電波信号の受信周波数に基づいて秒針の運針形態を設定し、設定された運針形態で秒針駆動系１２０の秒針用モータ１２１に運針形態に応じたパルス間隔の駆動パルス信号Ｐを印加して秒針を運針させる制御回路１４とを設けたので、異なる周波数の標準時刻電波信号を選択的に受信して時刻修正を行う際に、別途、受信周波数用の表示装置を設けることなく、秒針の運針形態により受信周波数をユーザに示すことができる。
【０１２０】
また、制御回路１４は、受信状態に応じて受信周波数を設定し、その設定した受信周波数に基づいて秒針の運針形態を自動的に切替えるので、ユーザが煩雑な操作を行うことなく受信周波数が自動で設定され、ユーザは秒針の運針形態を見ることにより簡単に受信周波数を確認することができる。
【０１２１】
さらに、運針形態を切替える運針切替スイッチ１２０２を設け、制御回路１４は運針切替スイッチ１２０２が操作されると秒針の運針形態を切替るので、ユーザの嗜好に合った運針形態で秒針を駆動させることができる。
【０１２２】
なお、本発明は本実施形態に限られるものではなく、任意好適な種々の変更が可能である。
本実施形態では、秒針用モータ１２１のロータから秒針車までの減速比が１／４８０であったが、この形態に限られるものではない。例えば減速比は略１／６０以下であれば、駆動パルス信号Ｐの印加タイミングを変えることにより、所望の運針形態に設定することができる。
【０１２３】
【発明の効果】
本発明によれば、異なる周波数の標準時刻電波信号を選択的に受信して時刻修正を行う際に、別途、受信周波数用の表示装置を設けることなく、受信周波数を示すことができる電波修正時計を提供することができる。
また、ユーザの嗜好に合った運針形態で秒針を駆動する電波修正時計を提供することができる。
【図面の簡単な説明】
【図１】本発明に係る電波修正時計の一実施形態の電気的な機能ブロック図である。
【図２】図１に示した電波修正時計の構成図である。
【図３】図２に示した電波修正時計の断面の拡大図である。
【図４】本発明に係る制御回路における電波受信状態を説明するための図である。
【図５】標準時刻電波信号の時刻コードの一例を示している。（ａ）は毎時１５，４５分以外のフォーマット、（ｂ）は毎時１５分，４５分のフォーマットを示す。
【図６】図２に示した電波修正時計の駆動用モータおよび制御回路を模式的に示した図である。
【図７】図２に示した電波修正時計の駆動用モータのロータ付近の拡大図である。
【図８】図１に示した電波修正時計の運針形態を説明するための図である。
【図９】図１に示した電波修正時計の受信状態に応じた評価値の生成処理を説明するための図である。
【図１０】図１に示した電波修正時計の動作を説明するためのフローチャートである。
【図１１】図１に示した電波修正時計の動作を説明するためのフローチャートある。
【図１２】図１に示した電波修正時計の指針位置検出処理を示すフローチャートである。
【図１３】図１に示した電波修正時計の検出光の出力パターンを説明するための図である。
【符号の説明】
１…電波修正時計、１１…標準電波受信系、１１ａ…受信アンテナ、１１０…長波受信回路、１１１…４０ｋＨｚ受信回路、１１２…６０ｋＨｚ受信回路、１２…スイッチ群、１３…発振回路、１４…制御回路、１５…ドライブ回路、１６…発光素子、１７…バッファ回路、１８…ドライブ回路、１００…時計本体、１１１…下ケース、１１２…上ケース、１１３…中板、１２０…第１駆動系（秒針駆動系）、１２１…秒針用モータ（第一駆動源）、１２２…第１の５番車（第一伝達歯車、第一検出用歯車）、１２３…秒針車（第２検出用歯車、第一指針車）、１２６…６番車、１２７…７番車、１３０…第２駆動系（時分針駆動系）、１３１…時分針用モータ（第２駆動源）、１３２…第２の５番車、１３３…３番車、１３４…分針車（第２指針車）、１３５…日の裏車、１３６…時針車（第２指針車）、１４０…光検出センサ、１４２…発光素子、１４３…回路基板、１４４…受光素子、１５０…手動修正系、１５１…手動修正軸、１２０１…受信修正スイッチ、１２０２…運針切替スイッチ、１４０１…内部時計、１４０２…メモリ。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a radio-controlled timepiece that displays time with a pointer including at least a second hand and corrects time information based on a standard time radio signal.
[0002]
[Prior art]
Conventionally, step movements, continuous movements, and the like are known as movements of the second hand of a timepiece. In this timepiece, in order to drive the second hand in a preset hand movement form, a gear train reduction ratio and a drive pulse signal to be applied to a drive motor for driving the second hand are set in advance. In recent years, there is a demand for a timepiece in which the second hand movement mode changes due to diversification of user preferences.
[0003]
By the way, there is known a radio-controlled timepiece that receives a standard time radio signal and corrects a display time by a pointer based on the standard time radio signal. In addition, when receiving a standard time radio signal, there is known a radio-controlled timepiece that indicates the reception state to the user by changing the second hand movement mode depending on whether the standard time radio signal is being received or not (see, for example, Patent Document 1). .
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-1559689 (Fig. 1-4)
[0005]
[Problems to be solved by the invention]
In recent years, a transmission station that transmits a standard time radio signal having a frequency different from the frequency of the standard time radio signal transmitted conventionally has been newly established. Radio correction clocks that make corrections are also known.
[0006]
For example, in a radio wave correction watch equipped with a reception frequency setting switch, the user can know the reception frequency with the setting switch. However, in the case of a radio wave correction clock that automatically selects the reception frequency, a reception frequency is separately provided. It is necessary to provide a liquid crystal display device or the like for displaying.
[0007]
For this reason, a radio-controlled timepiece that can indicate the reception frequency without providing a separate display device for the reception frequency is desired. In addition, for example, there is a demand for a radio-controlled timepiece that drives the second hand in a hand movement mode that matches the user's preference.
[0008]
The present invention has been made in view of such circumstances, and an object of the present invention is to separately provide a display device for reception frequency when selectively receiving standard time radio signals of different frequencies and correcting the time. An object of the present invention is to provide a radio-controlled timepiece that can indicate a reception frequency without any problems.
[0009]
Another object of the present invention is to provide a radio-controlled timepiece that drives the second hand in the form of hand movement that matches the user's preference.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, according to an aspect of the present invention, there is provided a radio-controlled timepiece that displays time by a pointer including at least a second hand, and drives the second hand with a set hand movement form. Based on the reception frequency of the standard time radio signal received by the receiving means, a receiving means that selectively receives a standard time radio signal of a plurality of different frequencies, and setting the hand movement form of the second hand, Control means for causing the pointer drive system to move the second hand in the set hand movement form.
[0011]
According to the aspect of the present invention, in the pointer driving system, the pointer is driven and the second hand is driven with a set hand movement form.
The receiving means selectively receives a plurality of standard time radio signals having different frequencies.
The control means sets the second hand movement form based on the reception frequency of the standard time radio signal received by the receiving means, and causes the pointer drive system to move the second hand in the set hand movement form.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The radio-controlled timepiece according to the present embodiment selectively receives standard time radio signals of a plurality of different frequencies, sets the second hand operating mode based on the reception frequency of the standard time radio signals, and sets the operating hand The second hand is moved by driving the pointer drive system in the form. Hereinafter, description will be given with reference to the drawings.
[0013]
FIG. 1 is an electrical functional block diagram of an embodiment of a radio-controlled timepiece according to the present invention. FIG. 2 is a configuration diagram of the radio-controlled timepiece shown in FIG. FIG. 3 is an enlarged view of a cross section of the radio-controlled timepiece shown in FIG.
[0014]
As shown in FIG. 1, for example, the radio-controlled timepiece 1 according to the present embodiment includes a standard radio wave reception system 11, a switch group 12, an oscillation circuit 13, a control circuit 14, a drive circuit 15, a light emitting element 16 as a notification means, and a buffer. Circuit 17, drive circuit 18, watch body 100, second hand motor 121, hour / minute hand motor 131, light detection sensor unit 140, manual correction system 150, transistors Q1 and Q2, and resistance elements R1 to R5, capacitors C2, C3 C1201-C1202.
The standard radio wave receiving system 11 corresponds to a receiving unit according to the present invention, and the control circuit 14 corresponds to a control unit according to the present invention. The second hand motor 121 corresponds to a second hand drive motor according to the present invention.
[0015]
For example, the standard radio wave receiving system 11 receives a standard radio wave signal including standard time information (also referred to as a time code) transmitted from a reception antenna 11a and a standard radio wave transmission station (not shown), performs predetermined processing, and performs pulse processing. A long wave receiving circuit 110 that outputs the signal S11 to the control circuit 14 is provided.
The long wave reception circuit 110 includes, for example, an RF amplifier, a detection circuit, a rectification circuit, and an integration circuit (not shown).
[0016]
In order to receive a plurality of different frequencies, the long wave receiving circuit 110 includes, for example, a 40 kHz receiving circuit 111, a 60 kHz receiving circuit 112, and a switching unit 113 as shown in detail in FIG.
[0017]
The 40 kHz receiving circuit 111 demodulates a standard radio wave with a frequency of 40 kHz from the receiving antenna 11a and outputs a received signal S111. The 60 kHz receiving circuit 112 demodulates a standard radio wave having a frequency of 60 kHz from the receiving antenna 11a and outputs a received signal S112.
[0018]
The switching unit 113 switches between the 40 kHz receiving circuit 111 and the 60 kHz receiving circuit 112 in accordance with the control signal CTL 113 from the control circuit 14.
For example, as shown in FIG. 1, the switching unit 113 includes a terminal 113a, a terminal 113b, and a terminal 113c.
The switching unit 113 connects the terminal 113a and the terminal 113c when receiving the control signal CTL113 for switching from the control circuit 14 to the 40 kHz receiving circuit 111, and receives the control signal CTL113 for switching from the control circuit 14 to the 60kHz receiving circuit 112. In this case, the terminals 113b and 113c are connected, and the reception signals from the 40 kHz reception circuit 111 and the 60 kHz reception circuit 112 are selectively (also referred to as alternative) and output to the control circuit 14 as the signal S11.
[0019]
In addition, the long wave standard radio wave which is received by the standard radio wave receiving system 11 and accurately conveys the Japanese standard time is transmitted in the following form.
Specifically, the time code is composed of three types of signal patterns of 1, 0, and P, and is distinguished by a 100% amplitude period width in one signal pattern of 1 sec. 1, 0 and P are 500 ms, 800 ms, and 200 ms, respectively. It has become. The modulation method is amplitude modulation with a maximum value of 100% and a minimum value of 10%.
When the reception state is good, the standard radio wave receiving system 11 outputs a signal S11 to the control circuit 14 as a pulse signal corresponding to the standard radio wave signal.
[0020]
Japanese standard radio waves are operated by the Communications Research Laboratory (CRL), a standard radio transmitter that transmits standard radio waves with a frequency of 40 kHz, and standard radio wave transmitters that transmit standard radio waves with a frequency of 60 kHz. A place is provided.
The standard radio wave received by the standard radio wave receiving system 11 is sent in a form as shown in FIG.
[0021]
Specifically, the time code is composed of three types of signal patterns of 1, 0, and P, and is distinguished by a 100% amplitude period width in one signal pattern of 1 sec. 1, 0 and P are 500 ms, 800 ms, and 200 ms, respectively. It has become. The modulation method is amplitude modulation with a maximum value of 100% and a minimum value of 10%.
[0022]
When the reception state is good, the standard radio wave receiving system 11 outputs a signal S11 as a pulse signal corresponding to the standard time radio wave signal to the control circuit 14, as shown in FIG.
[0023]
The signal S11 is composed of, for example, a high level corresponding to the first level and a low level corresponding to the second level. The control circuit 14 performs reception state evaluation processing as described later based on the high level and the low level, the falling edge ed1 from the high level to the low level, and the rising edge ed2 from the low level to the high level. When the edges ed1 and ed2 are not distinguished, they are simply referred to as edges ed.
[0024]
Next, transmission data of the long wave standard radio wave will be described.
FIG. 5 shows an example of the time code of the standard time radio signal. FIG. 5A shows a format other than 15/45 minutes, and FIG. 5B shows a format of 15 minutes and 45 minutes.
The transmission information is the accumulated date from minutes, hours, and January 1st.
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. In addition to the 0 · 1, the transmitted data includes a marker called P code. This P code has several locations in one frame, and the minute (0 seconds), 9 seconds, 19 seconds, 29 seconds, Appears at 39, 49, 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, since time data such as minute / hour data is determined in the frame with reference to this minute position, time data cannot be extracted unless this minute position is detected.
[0025]
The switch group 12 is operated by a user, for example, and a signal corresponding to the operation is output to the control circuit 14.
For example, as illustrated in FIG. 1, the switch group 12 includes a reception correction switch 1201 and a hand movement switch 1202.
The hand movement selector switch 1202 corresponds to the hand movement form setting means according to the present invention.
[0026]
The reception correction switch 1201 is operated, for example, when the display time is forcibly corrected, and outputs a signal S1201 corresponding to the operation to the control circuit 14. When the reception correction switch 1201 is operated and the signal S1201 is input, the control circuit 14 causes the standard radio wave receiving system 11 to receive the standard time radio signal.
[0027]
The hand movement selector switch 1202 is operated by the user to set the second hand movement form to a predetermined hand movement form, and outputs a signal S1202 corresponding to the operation to the control circuit 14. For example, when the hand movement selector switch 1202 is operated, the control circuit 14 sets one of the plurality of different hand movement forms based on the signal S1202. The second hand moving form is a second hand moving method.
[0028]
The oscillation circuit 13 includes a crystal oscillator CRY and capacitors C2 and C3, and supplies a basic clock having a predetermined frequency to the control circuit 14.
[0029]
The control circuit 14 has an internal clock 1401 and a memory 1402.
The internal clock 1401 includes, for example, an hour counter, a minute counter, and a second counter.
[0030]
The memory 1402 is used as a work space of the control circuit 14, for example. For example, the memory 1402 includes a RAM (Random access memory) or the like. The memory 1402 stores, for example, a program for realizing the function according to the present embodiment.
[0031]
The control circuit 14 performs the phase detection process of the hour / minute hand wheel and the second hand wheel, the origin search process of the second hand, the origin search process of the hour / minute hand, and detects the position of each hand wheel after a predetermined time. Set a guideline.
[0032]
For example, the phase adjustment processing is performed by setting the hour / minute hands to a position where the light output from the light emitting element 142 passes through the light transmitting portion provided in the hour / minute hand wheel and the light transmitting portion provided in the second hand wheel. Drive the car and the second hand wheel.
In the second hand origin search process, the light output from the light emitting element 142 is received by the light receiving element 144 by the light shielding portion and the light transmitting portion provided in the second hand wheel, and the origin is searched based on the light on / off pattern. The
As will be described later, the hour / minute hand origin search process is a light on / off pattern in which the light output from the light emitting element 142 is received by the light receiving element 144 by the light shielding portion and the light transmitting portion provided in the hour / minute hand wheel. The position is searched based on.
[0033]
The control circuit 14 detects the reference position of the minute hand wheel and the hour hand wheel based on the detection result by the light detection sensor 140 as the reference position detection means, and then, based on the standard time radio wave signal received by the standard radio wave receiving system 11, The hour hand and minute hand wheel are driven by the hour / minute hand drive system 130 to display the standard time on the hour hand and minute hand.
[0034]
Further, the control circuit 14 detects the reference position of the second hand wheel and the minute hand wheel based on the detection process by the light detection sensor 140, and then, based on the standard time radio signal received by the standard radio wave receiving system 11, the second hand drive system 120. Then, the second hand wheel is driven so that the second hand is synchronized with the second counter of the internal clock 1401, that is, the second time is synchronized with the standard time radio signal.
[0035]
FIG. 6 is a diagram schematically showing a drive motor and a control circuit of the radio-controlled timepiece shown in FIG.
The second hand motor 121 according to the present embodiment is a driving motor for performing step hand movement or continuous hand movement as a hand movement form when moving the second hand, for example.
For example, the second hand motor 121 has a terminal TO1 and a terminal TO2, as shown in FIG. The terminal TO1 and the terminal TO2 are connected to the control circuit 14.
[0036]
FIG. 7 is an enlarged view of the vicinity of the rotor of the drive motor of the radio-controlled timepiece shown in FIG.
As illustrated in FIG. 7, the rotor 121 c is provided so that the pinion 121 d of the rotor 121 c meshes with the seventh wheel & pinion 127.
The rotor 121c has a magnetic moment 121m due to a built-in magnet generated by, for example, magnetization.
The pinion 121d of the rotor 121c is provided with onion teeth 121e for preventing reverse rotation. For example, as shown in FIG. 7, two oni teeth 121e are provided symmetrically at the center of the rotor 121c.
[0037]
For example, when the rotor 121c rotates in the forward direction, the on-tooth 121e can rotate without the on-tooth 121e of the pinion 121d hitting the seventh wheel 127.
Further, for example, when a load is applied to the rotor 121c in the reverse rotation direction via a train wheel provided with a pointer, specifically, when a load is applied in the reverse rotation direction via the seventh wheel 127, the on-tooth 121e of the rotor 121c is , Meshing with the seventh wheel 127 and preventing reverse rotation. Further, the tooth 121e prevents reverse rotation due to malfunction of the rotor 121c.
[0038]
The control circuit 14 sets the second hand movement mode based on the reception frequency of the standard time radio signal received by the standard radio wave reception system 11, and causes the pointer drive system to move the second hand in the set movement mode.
More specifically, the control circuit 14 sets the second hand movement form based on the reception frequency of the standard time radio signal, and applies a drive pulse signal with a pulse interval corresponding to the set hand movement form to the second hand motor 121. Move the second hand.
More specifically, the control circuit 14 applies a drive pulse signal at least at equal intervals to the second hand motor 121 based on the reception frequency of the standard time radio signal, or the first hand movement. One of the second hand movement forms that applies the drive pulse signal at a timing different from the form is set, and a drive pulse signal with a pulse interval corresponding to the set hand movement form is applied to the second hand motor 121.
[0039]
FIG. 8 is a view for explaining a hand movement form of the radio wave correction timepiece shown in FIG.
For example, in detail, the control circuit 14 moves the second hand continuously for a predetermined time within one second by moving the second hand continuously, and the non-continuous hand, for example, one second, In the remaining time of the second, the hand movement for stopping the second hand (also referred to as pseudo step hand movement) is switched according to the reception frequency.
The continuous movement corresponds to the first movement form according to the present invention, and the pseudo step movement corresponds to the second movement form according to the present invention.
[0040]
For example, as shown in FIGS. 8A and 8B, the control circuit 14 drives the drive signal (control signal CTL1) alternately at equal intervals to the terminal TO1 and the terminal TO2 in 1 second (1000 ms). A driving pulse signal P is applied.
In this embodiment, for example, if the reduction ratio from the rotor 121c to the second hand wheel is 1/480, 16 high-level drive pulse signals P are sent per second in order to advance the second hand position by a distance corresponding to 1 second. Applied to the second hand motor 121.
For example, the pulse interval of the drive pulse signal P applied to one terminal is 125 ms, the time during which the pulse signal P is at a high level is 23.4 ms, and the pulse signal P applied to the terminal TO1 and the terminal T02 is one The drive pulse signal P applied to the terminal is shifted by 62.5 ms, which is a half of the pulse interval 125 ms.
[0041]
For example, as shown in FIGS. 8C and 8D, the control circuit 14 corresponds to 1 second of the second hand position in the first half of 1 second (500 ms) as shown in FIGS. In order to continuously move the second hand by the distance to be applied, 16 high-level drive pulse signals P are alternately applied to the terminal T01 and the terminal TO2.
In the first half of 0.5 seconds, for example, the pulse interval of the drive pulse signal P applied to one terminal is 62.5 ms, the high level time of the pulse signal P is 31.25 ms, and the terminal TO1 and the terminal T02 The pulse signal P applied to is shifted by 31.25 ms.
Further, the control circuit 14 stops the second hand without applying the high-level pulse signal P in the remaining second half of one second, 0.5 seconds.
[0042]
The hand movement form is not limited to the form described above. For example, when the reduction ratio of the train wheel is set so that 16 drive pulse signals P are applied to the second hand motor 121 per second, the drive pulse may be applied for 1 second, for example, It may be a moving form of driving for 250 ms per second, stop for 250 ms, drive for 250 ms, and stop for 250 ms, or any other desired moving form.
[0043]
The operation for determining the reception frequency by the control circuit 14 will be described below.
The control circuit 14 performs sampling (for example, 32 Hz) of a standard radio wave reception signal for a predetermined time, for example, 8 seconds in this embodiment, and determines the reception state based on the sampling result.
[0044]
Specifically, the control circuit 14 outputs a control signal CTL 113 for selecting, for example, the 40 kHz receiving circuit 111 to the switching unit 113, performs sampling (for example, 32 Hz) of the standard radio wave signal S111 output from the 40 kHz receiving circuit 111, An edge ed is detected, and an evaluation value A is generated based on the presence / absence and number of the edge ed.
[0045]
Further, the control circuit 14 obtains the sum of the high level and the low level at each sampling timing within a predetermined time, for example, 1 second, and evaluates according to the fluctuation of the standard time signal and the noise amount based on the sum value. Generate the value B. This evaluation value B indicates the stability of the reception state.
[0046]
The control circuit 14 evaluates the reception state based on the evaluation value A and the evaluation value B, for example, based on the total evaluation value (evaluation value A + evaluation value B).
For example, when the control circuit 14 determines that the reception state is good based on the evaluation value A and / or the evaluation value B, the control circuit 14 receives the frequency of the standard radio wave in the good reception state by the standard radio wave reception system 11. Set to frequency.
[0047]
The control circuit 14 outputs a control signal CTL113 to switch the reception frequency of the standard radio wave reception system 11 in the case of an unsatisfactory reception state, and similarly evaluates the evaluation value A and the 60 kHz standard radio wave based on the reception state. The evaluation value B is generated, compared with the evaluation value A and the evaluation value B indicating the reception state of the standard radio wave at the previous reception frequency, and the standard radio wave reception system 11 is set to the reception frequency with the better reception state.
The control circuit 14 performs a second synchronization detection process and a time correction process in accordance with a standard time signal included in the standard radio wave received by the standard radio wave receiving system 11 with the set reception frequency.
[0048]
The control circuit 14 also performs second synchronization processing based on the above-described sampled data for 8 seconds. In this case, overhead due to frequency selection can be suppressed.
[0049]
FIG. 9 is a diagram for explaining an evaluation value generation process according to the reception state of the radio-controlled timepiece shown in FIG.
FIG. 9A is a diagram showing the sampling result of the received signal, FIG. 9B is a diagram for explaining the generation process of the evaluation value A, and FIG. 9C is the generation process of the evaluation value B. It is a figure for demonstrating.
[0050]
For example, the control circuit 14 samples a standard radio wave having a predetermined reception frequency in the memory 1402 at a predetermined sampling frequency, for example, 32 Hz. FIG. 9A shows the signal intensity sampled for 1 second on the horizontal axis when the sampled signal intensity is “1” when the signal level is high and “0” when the signal intensity is low.
For example, when the received signal is sampled from the 0th second by the second counter of the internal clock 1401, for example, as shown in the first line of FIG. 9A, 0,0,1,1,1,1,1, 1,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1 Receive.
[0051]
In the next 1 second, as shown in the second row, 1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,1,1,1,1,1,1,1,1 are received.
Thereafter, the second to eighth seconds are similarly received. At this time, for example, the memory 1402 is used as a ring memory.
In the present embodiment, as shown in FIG. 9A, a reception result in a good reception state when the zero second position of the standard radio wave and the internal clock 1401 are shifted by about 0.25 seconds is shown.
[0052]
The control circuit 14 detects the low level “0” from the low level “0” and the low level “0” from the high level “1” of the received signal, sets each to the edge ed, and there is no edge ed every second. 1. If there is an edge, x0 to x7 are generated as 0, and the total number X of x0 to x7 is calculated. For example, as shown in FIG. 9, 0 to 8 seconds are 0, and the total number X is 0.
[0053]
The control circuit 14 detects the number of edges y0 to y7 every second and adds the number of edges y0 to y7 to calculate the total number Y of edges.
Further, when the total number Y of edges is larger than a predetermined value, for example, as shown in Equation (1), it becomes 15 when the total number Y is larger than 32 so as to be constant. To generate a total number Z.
[0054]
[Expression 1]

[0055]
For example, the control circuit 14 calculates the evaluation value A based on the total number X and the total number Z as shown in Equation (2).
[0056]
[Expression 2]

[0057]
When the low level is 0 and the high level is 1 as shown in FIG. 9A, the control circuit 14 generates a total number b0 to b31 at the same timing for 8 seconds. Evaluate level changes. The total number b0 to b31 is also simply referred to as the total number b.
[0058]
For example, in the case shown in FIG. 9 (a), the control circuit 14 has 5,6,8,8,8,8,8,0,0,0,0, Assume that 0,0,1,1,1,1,1,1,1,1,1,4,5,5,5,5,5,5,5,5.
[0059]
The control circuit 14 generates the low level “L (0)” stability SL based on the total number b.
For example, as illustrated in FIG. 9C, the control circuit 14 sets the stability SL to 0 when 5 or more of the total numbers b1 to b31 are consecutive. In cases other than the above, when the number of 1 or less continues 5 or more, the stability SL is set to 1. In cases other than the above, when the number of 2 or less continues 5 or more, the stability SL is set to 2. If none of the above conditions is satisfied, the stability SL is set to 7.
[0060]
For example, as illustrated in FIG. 9C, the control circuit 14 generates the stability SH of the high level “H (1)” based on the total number b. Specifically, for example, as illustrated in FIG. 9C, the control circuit 14 sets the stability SH to 0 when 8 or more of the total numbers b1 to b31 are continuous. In cases other than the above, when the number of 6 or less continues 5 or more, the stability SH is set to 1. In cases other than the above, when the number of 4 or less continues 5 or more, the stability SH is set to 2. If none of the above conditions is met, the stability SH is set to 7.
[0061]
The control circuit 14 generates an evaluation value B based on the stability SL and the stability SH. For example, the control circuit 14 adds the stability SL and the stability SH to generate an evaluation value B as shown in Equation (3).
[0062]
[Equation 3]
Evaluation value B = Stability SL + Stability SH (3)
[0063]
The evaluation value B is an index indicating the stability of the received signal. The smaller the evaluation value B is, the more stable the value is.
In the case of the control circuit 14 shown in FIG. 9A, the evaluation value B is 0 because the stability SL is 0 and the stability SH is 0.
[0064]
Based on the evaluation value A and the evaluation value B, the control circuit 14 generates an evaluation value C indicating the reception state of the received signal. For example, the control circuit 14 adds the evaluation value A and the evaluation value B to generate an evaluation value C as shown in Equation (4). The smaller the evaluation value C, the better the reception state.
[0065]
[Expression 4]
Evaluation value C = Evaluation value A + Evaluation value B (4)
[0066]
In the case shown in FIG. 9A, the control circuit 14 determines that the evaluation value A is 0 and the evaluation value B is 0 and the reception state is very good because the evaluation value A is 0 and the evaluation value B is 0. To do.
[0067]
For example, when the evaluation value C is smaller than a predetermined value, for example, 2, the control circuit 14 determines that the reception state is extremely good, and receives the reception at the evaluated reception frequency by the long wave reception circuit 110. Set the frequency.
[0068]
When the evaluation value C is larger than the predetermined value, the control circuit 14 samples the standard radio waves having different frequencies, evaluates the reception state, and compares it with the evaluation value C indicating the reception state of the standard radio waves having different frequencies. A control signal CTL 113 that receives a standard radio wave having a smaller evaluation value C is output to set the reception frequency of the standard radio wave reception system 11.
The control circuit 14 counts various counters of the internal clock 1401 based on the basic clock by the oscillation circuit 13 when the time can be set based on the standard radio time signal received at the set reception frequency. Take control.
[0069]
When the reception state is not within the reference range, the control circuit 14 outputs the drive signal DR1 to the drive circuit 15 without outputting the control signal CTL1, and causes the light emitting element 16 as the notification means to emit light to the user. Notify that the standard radio wave signal is hardly received.
[0070]
Based on the received standard time information, the control circuit 14 compares the time information measured by the various time counters of the internal clock 1401 with the standard time information. Accordingly, the time counter is corrected, and in response to the correction, a pulse signal P for correction is input to the hour / minute hand motor 131 as the control signal CTL2 to perform fast-forward driving or the like to correct the time display by the hands.
[0071]
The drive circuit 15 includes a pnp transistor Q1 and resistors R1 and R2.
The base of the transistor Q1 is connected to the output line of the drive signal DR1 of the control circuit 14 via the resistor element R1, the collector is connected to the anode of the light emitting element 16 made of, for example, a light emitting diode, and the emitter is connected via the resistor element R2. Power supply voltage V _CC Connected to the supply line. The cathode of the light emitting element 16 is grounded.
The light emitting element 16 blinks in response to the drive signal DR1 output from the control circuit 14 at regular intervals.
[0072]
The drive circuit 18 is a drive circuit for the light transmission type photodetection sensor 140, and includes, for example, a pnp type transistor Q2 and resistance elements R3 and R4.
The emitter of the transistor Q2 is the power supply voltage V _CC The base is connected to the output line of the drive signal DR2 of the control circuit 14 via the resistance element R3, and the collector is connected to the light transmission type photodetection sensor 140 via the resistance element R4.
The drive circuit 18 supplies power to the light transmission type photodetection sensor 140 when the drive signal DR <b> 2 is output from the control circuit 14.
[0073]
As shown in FIG. 3, the light transmission type light detection sensor 140 is attached to the upper case 112 so as to face the light emitting element 142 and the light emitting element 142 made of a light emitting diode attached to the lower case 111, for example. And a light receiving element 144 made of a phototransistor.
[0074]
As shown in FIGS. 2 and 3, the sixth wheel 126, the second hand wheel 123, the third wheel 133, the minute hand wheel 134, and the hour hand wheel 136 are all disposed at the same time. When the long hole of the sixth wheel 126, the long hole of the second hand wheel 123, the long hole of the third wheel 133, the long hole of the minute hand wheel 134, and the long hole of the hour hand wheel overlap, the light emitting element 142 emits the light. The detected light is received by the light receiving element 144, and the light transmission type light detection sensor 140 is turned on.
The control circuit 14 detects the position of the pointer according to the state of the light transmission type light detection sensor 140.
[0075]
The anode of the light emitting element 142 is connected to the other end of the resistance element R4 in the drive circuit 18 having one end connected to the collector of the pnp transistor Q2, and the cathode is grounded and connected to the emitter of the light receiving element 144.
[0076]
The collector of the light receiving element 144 is connected to the control circuit 14. The connection line to the control circuit 14 is an output line for the detection signal DT1 to the control circuit 14, and this output line is connected to the power supply voltage V via the resistor R5. _CC Connected to the supply line.
The light emitting element 142 is connected to the drive circuit 18 so as to emit light when a low level drive signal DR2 is output from the control circuit 14.
[0077]
Next, a specific configuration of the movement of the radio-controlled timepiece 1 and the pointer position detection system will be described with reference to FIGS.
As shown in FIGS. 2 and 3, the timepiece main body 100 has a lower case 111, an upper case 112 that are connected to face each other to form an outline, and a lower space in a space formed by the lower case 111 and the upper case 112. An intermediate plate 113 is provided in a state of being connected to the case 111.
[0078]
A first driving system for driving a second hand as a first pointer with respect to predetermined positions of the lower case 111, the middle plate 113, and the upper case 112 in the space, that is, a second hand driving system 120 and a second pointer. A second drive system for driving the hour / minute hands, that is, an hour / minute hand drive system 130, a light transmission type light detection sensor 140, a manual correction system 150 for manually correcting the time, and the like are fixed or pivotally supported. ing.
[0079]
As described above, the second hand drive system 120 includes the stator 121a, the drive coil 121b wound around the leg piece on one side of the stator 121a, and the rotor that is rotatably rotated between the other magnetic poles of the stator 121a. No. 6 as a first detection gear (first transmission gear) meshed with the seventh wheel 127 and a seventh wheel 127 engaged with the pinion 121d of the rotor 121c, the second hand motor 121 constituted by 121c. The vehicle 126, a first fifth wheel 122 as an intermediate wheel meshed with the sixth wheel 126, and a second hand wheel 123 as a second detection gear meshed with the first fifth wheel 122 Has been.
[0080]
Here, the rotation direction, the rotation angle, and the rotation speed of the second hand motor 121 are controlled based on the control signal CTL 1 output from the control circuit 14. In the present embodiment, as a minimum unit when considering the movement of the drive system, it is referred to as one step that the control circuit 14 oscillates a pulse signal once to drive the motors 121 and 131 in pulses. . The actual length of the interval between steps is different between normal hand movement and fast-forwarding at time adjustment, and also differs between the second hand drive system and the hour / minute hand drive system.
[0081]
In the continuous hand movement, it is necessary to increase the reduction ratio from the rotor 121c to the second hand wheel 123 in order to smoothly move the second hand, that is, the second hand wheel 123 to which the second hand is attached. Therefore, in the present embodiment, the first fifth wheel 122 is meshed as an intermediate wheel between the sixth wheel 126 serving as the first detection gear and the second hand wheel 123 serving as the second detection gear. I earn. Incidentally, in the present embodiment, the sixth wheel is 40 steps / rotation, the second hand wheel is 960 steps / rotation, and the reduction ratio from the rotor 121c to the second hand wheel 123 is 1/480.
In this embodiment, the second hand reference position is detected by using a transmission portion and a light shielding portion provided on the sixth wheel 126 and the second hand wheel 123.
[0082]
The reference position of the second hand, that is, the second hand wheel 123 is obtained using only the sixth wheel 126 and the second hand wheel 123. The method focuses on one point where the long holes of the 6th wheel 126 and the second hand wheel 123 overlap and detects detection light for position detection there, and the 6th wheel 126 and the second hand wheel 123 are detected. The reference position is detected by discriminating the ON / OFF pattern of the light detection sensor generated by the long hole and the light shielding portion.
[0083]
As shown in FIGS. 2 and 3, the hour / minute hand driving system 130 as the second driving system includes a substantially U-shaped stator 131a, a driving coil 131b wound around one leg piece of the stator 131a, An hour and minute hand motor 131 constituted by a rotor 131c rotatably supported between the other magnetic poles of the stator 131a, a second fifth wheel 132 as an intermediate wheel meshing with a pinion 131d of the rotor 131c, A third detection wheel 133 as a third detection gear (second transmission gear) meshed with the second fifth wheel 132 and a fourth detection gear (second pointer wheel) meshed with the third rotation wheel 133 A minute hand wheel 134, a minute wheel 135 as an intermediate wheel meshed with the minute wheel 134, and an hour hand wheel 136 as a fifth detection gear (second pointer wheel) meshed with the minute wheel 135 Composed There.
[0084]
Here, the rotation direction, the rotation angle, and the rotation speed of the hour / minute hand motor 131 are controlled based on the control signal CTL 2 output from the control circuit 14.
The third wheel & pinion 133 has three arc-shaped long holes having a predetermined width in the radial direction and extending by a predetermined length in the circumferential direction, and a portion between the long holes. A certain light shielding part is alternately arranged concentrically around the rotation axis of the third wheel & pinion 133.
[0085]
The minute hand wheel 134 has three arc-shaped long holes having a predetermined width in the radial direction and extending by a predetermined length in the circumferential direction, and a light shielding part between the long holes. The portions are alternately arranged concentrically around the rotation axis of the minute hand wheel 134.
[0086]
The hour hand wheel 136 has three arc-shaped long holes having a predetermined width in the radial direction and extending by a predetermined length in the circumferential direction, and a light shielding portion between the long holes. The portions are alternately arranged concentrically around the rotation axis of the hour hand wheel 136.
[0087]
In the present embodiment, the third wheel & pinion 133 is provided with three long holes as a transmission part for detecting the reference position. As in the case of the second hand wheel 123, in order to determine the reference position, the ON / OFF pattern of the light detection sensor generated by the long hole and the light shielding portion of the third wheel 133 and the minute hand wheel 134 is distinguished, and the minute hand according to the pattern. The reference position, for example, 0 minute, and the position indicating the reference position of the hour hand, for example, 0:00 are detected.
[0088]
The manual correction system 150 includes a minute wheel 135 that meshes with the minute hand wheel 134 and the hour hand wheel 136 described above, and a manual correction shaft 151 that meshes with the minute wheel 135 of this date. The manual correction shaft 151 is positioned outside the upper case 112 and has a head 151b that can be directly touched by a user.
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-mentioned hour / minute hand driving system 130, the minute hand wheel 134 is connected via the minute wheel 135. The pointer position can be manually corrected by rotating the head 151b with a finger when the hour / minute hand drive system 130 is not in operation.
[0089]
FIG. 10 is a flowchart for explaining the operation of the radio-controlled timepiece shown in FIG. The operation of the radio-controlled timepiece 1 will be described mainly with reference to FIG.
[0090]
In step ST1, for example, as an initial setting, the control circuit 14 outputs a control signal CTL113 for receiving a standard radio wave with a frequency of 40 kHz to the switching unit 113 to activate the 40 kHz receiving circuit 111 and receive the signal S111.
[0091]
In step ST2, the control circuit 14 determines whether or not 3 minutes or more have elapsed since the start of reception, including frequency selection and second synchronization. If it is determined that 3 minutes or more have elapsed, the control circuit 14 determines the reception frequency. (ST3), the temporary reception frequency is set to 40 kHz (ST4), and the process related to selection of the reception frequency is terminated.
[0092]
On the other hand, in step ST2, the control circuit 14 waits for stabilization of the output from the long wave receiving circuit 110. Specifically, when 5 seconds have elapsed from the start of reception (ST5), the standard radio wave is received for 8 seconds and sampled. (ST6).
In step ST7, the control circuit 14 measures the edge ed (both edges) every second, measures the seconds without the edge ed (ST8), and, as shown in FIG. Is generated (ST9).
[0093]
In step ST10, the control circuit 14 measures the level at each sampling timing, evaluates the “L” level stability SL as shown in FIG. 9 (ST11), and performs the “H” level stability SH. (ST12), and an evaluation value B is calculated from the determination result (ST13).
In step ST14, the control circuit 14 stores the previous evaluation value A in the memory 1402, and calculates the latest evaluation value C (ST15).
[0094]
In step ST16, the control circuit 14 determines whether or not it is the first reception. When it is determined that it is the first reception, it is determined whether or not the evaluation value is 2 or less (ST17), the current frequency is set as a reception frequency (ST18), and the process proceeds to the second synchronization process (ST19). ).
[0095]
On the other hand, if it is determined in step ST17 that the evaluation value C is 2 or more, that is, greater than 2, the reception frequency of the standard radio wave is switched. For example, the control signal CTL 113 for switching the reception frequency from 40 kHz to 60 kHz is output to the standard radio wave reception system 11 to switch the reception frequency (ST20), and the processing returns to step ST2, and similar processing is performed at the switched frequency.
[0096]
On the other hand, if it is determined in step ST16 that it is not the first reception, the current evaluation value C and the previous evaluation value C are compared (ST21). It is determined whether or not the evaluation value C is greater than the previous evaluation value C (ST22). If it is determined that the current evaluation value C is large, the process proceeds to step ST18.
[0097]
On the other hand, if it is determined in step ST22 that the current evaluation value C is smaller than the previous evaluation value C, the previous frequency is determined (ST23), and the process proceeds to the second synchronization process in step ST19. .
On the other hand, if the current evaluation value C matches the previous evaluation value C in the determination of step ST21, it is determined whether or not the evaluation value is 15 (ST24), and the evaluation value is determined to be 15. If it is determined that the reception state is not good, the process proceeds to step ST20.
[0098]
On the other hand, if it is determined in step ST24 that the evaluation value is not 15, it is determined that the reception state is not good, and the process proceeds to step ST18.
[0099]
When the reception frequency is confirmed, the control circuit 14 sets a confirmation flag. If the reception frequency cannot be normally received for 24 hours after the reception frequency is confirmed, the control circuit 14 clears the confirmation flag and performs the above-described selection process of the reception frequency again.
[0100]
For example, as shown in FIG. 9A, the control circuit 14 detects a pattern that becomes, for example, 111111,000,000 based on the standard radio signal of the determined reception frequency, and the falling edge ed1 from 1 to 0 is detected. The time is synchronized with the internal clock 1401 as the zero point of the standard radio signal.
Thereafter, the control circuit 14 performs minute synchronization processing, time code analysis processing, etc., outputs control signals CTL1 and CTL2 to the motors 121 and 131 according to the standard time, performs a fast-forward operation, and sets the pointer to the standard time. .
[0101]
FIG. 11 is a flowchart for explaining the operation of the radio-controlled timepiece shown in FIG. With reference to FIG. 11, the operation when the second hand is moved in the form of moving according to the reception frequency will be described.
[0102]
In step ST31, the control circuit 14 sets the reception frequency of the standard time radio signal for correcting the time information measured by the internal clock 1401 based on the reception states of the standard time radio signals of a plurality of different frequencies as described above. The standard radio wave reception system 11 receives the standard time radio signal of the selected reception frequency.
[0103]
In step ST32, the control circuit 14 sets the hand movement form based on the reception frequency of the selected standard time radio wave signal, and sends the drive pulse signal P having a pulse interval corresponding to the set hand movement form to the second hand motor 121 as a signal CTL1. Apply as
More specifically, for example, when the selected reception frequency is 60 kHz, the control circuit 14 sets continuous hand movement as the hand movement form, and the second hand motor 121 is equally spaced as shown in FIGS. Then, the driving pulse signal P is applied as the signal CTL1 to continuously move the second hand.
[0104]
On the other hand, in step ST33, for example, when the selected reception frequency is 40 kHz, the control circuit 14 sets the pseudo step movement as the movement form, and the first half of 1 second is set as shown in FIGS. 16 high-level drive pulse signals P are applied in 500 ms, and a signal CTL1 in which the high-level drive pulse signal P is not applied is input to the second-hand motor 121 in the second half of 1 second to pseudo-step the second hand Let the needle move.
[0105]
When the hand movement selector switch 1202 is operated, the control circuit 14 switches, for example, from continuous hand movement to pseudo step hand movement, or conversely, from pseudo step hand movement to continuous hand movement. Moreover, you may switch to another hand movement form.
[0106]
FIG. 12 is a flowchart showing the hand position detection process of the radio wave correction watch shown in FIG. The pointer position detection process will be described with reference to FIG.
An hour / minute pulse signal output pattern is set from the control circuit 14 (ST101), and the drive signal DR2 is output to the drive circuit 18 at a low level. Accordingly, the transistor Q2 is turned on, and detection light is emitted from the light emitting element 142, that is, the light emitting diode.
[0107]
Subsequently, the control signal CTL1 is output from the control circuit 14, the second hand motor 121 is pulse-driven (ST102), the light receiving element 144, that is, the phototransistor is turned on, and the detection signal DT1 is at a high level (power supply voltage V _cc It is determined whether or not the level has been switched to the low level (ST103).
[0108]
Here, when the detection signal DT1 from the phototransistor is held at a high level, the detection signal DT1 from the phototransistor is at a high level (power supply every time the number of pulses is added to perform step driving. Voltage V _cc It is determined whether or not the level has been switched from low to low (ST104 to ST106).
Even when the number of pulses reaches 9, the detection signal DT1 output from the phototransistor remains at the high level (power supply voltage V _cc If the level does not switch to the low level, the hour / minute hand motor 131 is driven by one step (pulse) (ST107), and then the second hand motor 121 is step-driven again (ST102), and the second hand wheel 123 is rotationally driven. Is done.
[0109]
On the other hand, when it is determined in step ST103 that the detection signal DT1 from the phototransistor has switched from the high level to the low level, the second hand wheel 123 is fast-forwarded (ST108), and the comparison with the output pattern stored in advance in the control circuit 14 is performed. Performed (ST109).
As a result of the comparison, if the obtained output pattern does not match the stored output pattern, the process returns to step ST108, and the second hand wheel 123 is fast-forwarded again.
[0110]
On the other hand, if the obtained output pattern matches the stored output pattern, the output of the phototransistor is then output at that time (when the level of the detection signal DT1 is not switched to the low level by the phototransistor even at the fifth step). At the time of switching to low level), the output of the control signal CTL1 is stopped, and the circuit driving of the second hand wheel 123 is stopped. Then, the second hand wheel 123 stops at the zero return position (ST110). At this time, the second hand is corrected to a position at a predetermined time, for example, the hour (0 second), and the second hand origin searching process ends.
[0111]
Subsequently, the control signal CTL2 is output from the control circuit 14, only the hour / minute hand motor 131 is pulse-driven at a predetermined output frequency, and the minute hand wheel 134 is fast-forwarded (ST111).
[0112]
Then, the output pattern from the phototransistor is compared with the output pattern stored in advance in the control circuit 14 (ST112).
As a result of the comparison, if the obtained output pattern does not match the stored output pattern, the process returns to step ST111, and the minute hand wheel 134 is fast-forwarded again.
[0113]
On the other hand, if the obtained output pattern matches the stored output pattern as a result of the comparison in step ST112, the output of the control signal CTL2 is stopped at that time, and the hour / minute hand motor 131 is stopped. Then, the driving of the minute hand wheel 134 and the hour hand wheel 136 is stopped (ST113).
[0114]
Here, the position detection processing of the hour / minute hand wheel by comparing the output pattern with the output pattern stored in advance is performed by matching with any of the three types of patterns.
[0115]
FIG. 13 is a diagram for explaining an output pattern of detection light of the radio-controlled timepiece shown in FIG.
That is, as shown in FIG. 13A, 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. 13B, 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, and an output pattern obtained by combining the two is, as shown in FIG. 13C, a pattern in which the D part, the B part, and the A part are combined, and the E part, Three types of patterns, which are a combination of the B part and the A part and a pattern of the C part, the B part, and the A part, appear at predetermined intervals.
In the pattern shown in FIG. 13, the portion of the pattern that is turned on is actually a portion that is turned off by the light-shielding portion of the third wheel & pinion 133, and is a toothless pattern.
[0116]
Further, for example, the reference positions of the minute hand wheel 134 and the hour hand wheel 136 are set at positions of 0:00, 4:00, and 8:00 as shown in FIG.
[0117]
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 composed of a combination of part C, part B and part A is confirmed, for example, it is set in advance as 12:00, for example, when any one of these patterns is detected, the hour / minute hand motor 131 is set. Is stopped, the time of the minute hand wheel 134 and the hour hand wheel 136, that is, the minute hand and the hour hand can be adjusted to a predetermined time.
[0118]
After the hour / minute hand motor 131 is stopped, the drive signal DR2 by the control circuit 14 is switched to a high level.
Thereby, the transistor Q2 of the drive circuit 18 is turned off, and the light emission of the light emitting diode is stopped (ST114).
[0119]
As described above, the second hand drive system 120 that drives the second hand with the set hand movement form, the hour / minute hand drive system 130 that drives the hour / minute hands, and the standard that selectively receives a plurality of standard time radio signals of different frequencies. Based on the radio wave receiving system 11 and the reception frequency of the standard time radio signal received by the standard radio wave receiving system 11, the second hand moving mode is set, and the second hand driving system 120 is set to the second hand driving system 120 in the set moving mode. And a control circuit 14 for moving the second hand by applying a driving pulse signal P with a pulse interval corresponding to the time interval, so that when the time is adjusted by selectively receiving a standard time radio wave signal of a different frequency, Without providing a display device for the reception frequency, the reception frequency can be shown to the user by the second hand movement mode.
[0120]
Further, since the control circuit 14 sets the reception frequency according to the reception state and automatically switches the second hand movement mode based on the set reception frequency, the reception frequency is automatically set without any complicated operation by the user. The user can easily confirm the reception frequency by looking at the second hand movement form.
[0121]
Further, a hand movement changeover switch 1202 for switching the hand movement form is provided, and the control circuit 14 switches the hand movement form of the second hand when the hand movement changeover switch 1202 is operated. Therefore, the second hand can be driven in a hand movement form suitable for the user's preference. it can.
[0122]
Note that the present invention is not limited to the present embodiment, and various suitable modifications can be made.
In the present embodiment, the reduction ratio from the rotor of the second hand motor 121 to the second hand wheel is 1/480, but the present invention is not limited to this form. For example, if the reduction ratio is approximately 1/60 or less, the desired hand movement configuration can be set by changing the application timing of the drive pulse signal P.
[0123]
【The invention's effect】
According to the present invention, when a time adjustment is performed by selectively receiving standard time radio signals of different frequencies, the radio correction timepiece can indicate the reception frequency without providing a separate display device for the reception frequency. Can be provided.
In addition, it is possible to provide a radio-controlled timepiece that drives the second hand in the form of hand movement that matches the user's preference.
[Brief description of the drawings]
FIG. 1 is an electrical functional block diagram of an embodiment of a radio-controlled timepiece according to the present invention.
FIG. 2 is a configuration diagram of the radio-controlled timepiece shown in FIG.
FIG. 3 is an enlarged view of a cross section of the radio wave correction watch shown in FIG. 2;
FIG. 4 is a diagram for explaining a radio wave reception state in the control circuit according to the present invention.
FIG. 5 shows an example of a time code of a standard time radio signal. (A) shows formats other than 15 and 45 minutes per hour, and (b) shows formats for 15 minutes and 45 minutes per hour.
6 is a diagram schematically showing a drive motor and a control circuit of the radio-controlled timepiece shown in FIG. 2. FIG.
7 is an enlarged view of the vicinity of the rotor of the drive motor of the radio-controlled timepiece shown in FIG. 2;
8 is a diagram for explaining a hand movement form of the radio-controlled timepiece shown in FIG. 1. FIG.
9 is a diagram for explaining an evaluation value generation process according to the reception state of the radio-controlled timepiece shown in FIG. 1; FIG.
10 is a flowchart for explaining the operation of the radio-controlled timepiece shown in FIG.
11 is a flowchart for explaining the operation of the radio-controlled timepiece shown in FIG.
12 is a flowchart showing a hand position detection process of the radio-controlled timepiece shown in FIG.
13 is a diagram for explaining an output pattern of detection light of the radio-controlled timepiece shown in FIG. 1; FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Radio wave correction clock, 11 ... Standard radio wave reception system, 11a ... Reception antenna, 110 ... Long wave reception circuit, 111 ... 40kHz reception circuit, 112 ... 60kHz reception circuit, 12 ... Switch group, 13 ... Oscillation circuit, 14 ... Control circuit , 15 ... drive circuit, 16 ... light emitting element, 17 ... buffer circuit, 18 ... drive circuit, 100 ... watch body, 111 ... lower case, 112 ... upper case, 113 ... middle plate, 120 ... first drive system (second hand drive) System), 121 ... second hand motor (first drive source), 122 ... first fifth wheel (first transmission gear, first detection gear), 123 ... second hand wheel (second detection gear, first pointer) Car), 126 ... 6th car, 127 ... 7th car, 130 ... second drive system (hour / minute hand drive system), 131 ... hour / minute hand motor (second drive source), 132 ... second 5th car, 133 ... No. 3 car, 134 ... Minute hand wheel (No. Pointer wheel), 135 ... Sunday wheel, 136 ... hour hand wheel (second pointer wheel), 140 ... light detection sensor, 142 ... light emitting element, 143 ... circuit board, 144 ... light receiving element, 150 ... manual correction system, 151 ... Manual correction shaft, 1201 ... Reception correction switch, 1202 ... Hand movement switch, 1401 ... Internal clock, 1402 ... Memory.

Claims (5)

A radio-controlled timepiece that displays the time with a hand that includes at least the second hand,
A needle drive system for driving the hands and driving the second hand with a set hand movement form;
Receiving means for selectively receiving a plurality of standard time radio signals of different frequencies;
Radio wave correction comprising: control means for setting the second hand movement form based on the reception frequency of the standard time radio signal received by the reception means and causing the pointer drive system to move the second hand in the set hand movement form clock. The pointer drive system includes a second hand drive motor for driving the second hand,
The control means sets the second hand movement form based on the reception frequency of the standard time radio signal, and applies a drive pulse signal with a pulse interval corresponding to the set hand movement form to the second hand drive motor. Item 2. A radio-controlled timepiece according to item 1. The control means, based on the reception frequency of the standard time radio signal, at least a first hand movement form that applies the drive pulse signal to the second hand drive motor at equal intervals, or the first hand movement form 3. One of the second hand movement forms for applying the drive pulse signal at different timings is set, and a drive pulse signal having a pulse interval corresponding to the set hand movement form is applied to the second hand drive motor. Radio wave correction clock of mention. The control means causes the receiving means to select a reception frequency of the standard time radio signal for correcting time information measured by the internal clock based on reception states of the standard time radio signals of the plurality of different frequencies. The hand movement form is set based on the reception frequency of the standard time radio signal selected by the receiving means, and a drive pulse signal having a pulse interval corresponding to the set hand movement form is applied to the second hand drive motor. The radio wave correction watch according to 2 or 3. Having a hand movement form setting means for setting the hand movement form of the second hand by an external operation;
The radio-controlled timepiece according to any one of claims 1 to 4, wherein the control means causes the hand driving system to move the second hand in a hand movement form set by the hand movement form setting means.

Images