JP2004077177A - Electronic clock - Google Patents

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Publication number
JP2004077177A
JP2004077177A JP2002234677A JP2002234677A JP2004077177A JP 2004077177 A JP2004077177 A JP 2004077177A JP 2002234677 A JP2002234677 A JP 2002234677A JP 2002234677 A JP2002234677 A JP 2002234677A JP 2004077177 A JP2004077177 A JP 2004077177A
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Japan
Prior art keywords
hand
light
dial
electronic timepiece
minute
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JP2002234677A
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Japanese (ja)
Inventor
Masayuki Kawada
河田 正幸
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Seiko Instruments Inc
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Seiko Instruments Inc
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Priority to JP2002234677A priority Critical patent/JP2004077177A/en
Publication of JP2004077177A publication Critical patent/JP2004077177A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an easily aligned electronic clock in assembling a needle position detecting mechanism. <P>SOLUTION: The electronic clock 1 has the needle position detecting mechanism for detecting rotation positions of needles 20 and 50 for indicating time, and substantially all sections to be positioned for a dial 4 of the needle position detecting mechanism are arranged on the front surface 8 side of the dial 4. In a specific place on the peripheral surface of a recessed part of an encapsulating case 2 on the front surface side of the dial 4 and in a peripheral surface specific place of a part positioned on the front surface 8 side of the dial 4 of shaft sections 21 and 51 of which tips are integrally mounted to the needles, the needle position detecting mechanism has one pair of facing detecting means 32, 34, 60 and 62 for detecting that the two places are faced to each other. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は電子時計に係わり、より詳しくは、針位置検出機構を備えた電子時計に係わる。
【0002】
【従来の技術】
時刻情報を含む標準電波を受信して該標準電波の時刻情報に応じて指針の表示時刻を修正する電波修正時計は知られている。この電波修正時計では、時刻情報に応じて指針位置を修正するに際して、例えば、指針を一旦初期位置に戻し、該初期位置から修正位置まで指針を移動させる。指針を初期位置に正確に戻すためには、指針が初期位置にあることを正確に検出する必要がある。従って、電波修正時計は、従来から針位置検出機構を備える。
【0003】
標準電波による時刻修正時に指針を初期位置に戻すタイプの従来の針位置検出機構は、典型的には、特開平10−300869号公報に開示されているように、指針の回転に連動して回転する回転体を文字板の背面側に備えると共に、文字板の背面側において、この回転体の軸線に平行な方向に相互に対面する一組の回転位置検出手段とを備える。
【0004】
【発明が解決しようとする課題】
しかしながら、この種の従来の針位置検出機構を備えた電子時計では、文字板の表面側に指針があるのに対して文字板の背面側に回転体やその回転位置検出手段を設ける必要があるので、取付の際、指針との位置合わせが容易でない。従って、初期位置に達したことが回転位置検出手段により検出乃至確定されると、その時点における実際の指針位置が目視により位置ズレとして決定され、該位置ズレがズレデータとして不揮発性メモリに格納され、該ズレデータをオフセット値として利用して、指針による表示時刻の修正(再設定)が行われる必要がある。
【0005】
また、この種の従来の針位置検出機構を備えた電子時計では、指針と回転体を軸線方向に重なる位置に設けるので、電子時計が厚くなり易く、ウオッチタイプの電子時計では、薄型化が制限され易い。
【0006】
本発明は、前記した点に鑑みなされたものであって、その目的とするところは、針位置検出機構の組付けに際して位置合せが容易に行われ易い電子時計を提供することにある。
【0007】
【課題を解決するための手段】
本発明の電子時計は、前記目的を達成すべく、時刻表示用の指針の回転位置を検出するための針位置検出機構を備えた電子時計であって、針位置検出機構のうち文字板に対して位置決めされるべき部分が文字板の表面側に配置されている。なお、文字板に対して位置決めされるべき部分は、実質的に全ての部分が文字板の表面側に配置されているのが好ましい。
【0008】
本発明の電子時計では、「針位置検出機構のうち文字板に対して位置決めされるべき実質的に全ての部分が文字板の表面側に配置されている」ので、文字板に対する相対位置を目視しながら針位置検出機構の関連部分の位置決めが行われ得るから、針位置検出機構の組付けに際して位置合せが容易に行われ易い。
【0009】
従って、特開平10−300869号公報に記載のような指針位置のズレを補正するためのオフセットデータを不揮発性メモリに格納しておかなくてもよい。但し、厳密さを求める場合、指針位置のズレを補正するためのオフセットデータを不揮発性メモリに格納し得るようにしておいてもよい。なお、電子時計がバックアップ用のバッテリを備えているような場合には、電子時計のモータ駆動用のバッテリを交換する際にも、電子時計の内部のクロックデータないし計時データバックアップバッテリにより保たれ得るので、電子時計の内部のクロックデータないし計時データを修正するようにしておいてもよい。
【0010】
針位置検出機構のうち文字板に対して位置決めされるべき実質的に全ての部分は、典型的には、一組の対面検出手段からなるけれども、場合によっては、関連部分が対面する代わりに特定の角度関係など特定の位置関係を有する状態であってもよい。
【0011】
即ち、本発明の電子時計において、針位置検出機構は、典型的には、外装ケースの凹部のうち文字板の表面側の周面の特定箇所と、指針が先端部に一体的に取りつけられた軸部のうち文字板の表面側に位置する部分の周面の特定箇所とに、該二つの箇所が相互に対面位置にあることを検出する一組の対面検出手段を備える。
【0012】
従って、本発明の電子時計では、針位置検出機構の関連部分が時計の厚さ方向ではなくて半径方向に拡がるので、電子時計が厚くなる虞れが少ない。但し、場合によっては、文字板及び前面側の外装ガラスのうちの少なくとも一方の針位置検出手段を設けて指針の位置を検出するようにしてもよい。
【0013】
更に、本発明の電子時計において、
(1)一組の対面検出手段が、送受信手段と反射手段とからなり、送受信手段が信号送信部及び信号受信部を含み、反射手段は、該反射手段が送受信手段に対面した際、送受信手段の信号送信部からの信号を信号受信部に向かって反射するように構成されていても、
(2)一組の対面検出手段が、送信手段と受信手段とからなり、受信手段は、該受信手段が送信手段に対面した際、送信手段からの信号を受信するように構成されていてもよい。
ここで、送受信される信号は、典型的には、光信号からなる。但し、所望ならば、他の種類の信号(例えば超音波信号など)でもよい。
【0014】
針位置検出機構は、指針が特定の位置(初期位置)に達したことを検出するようになっていても、実質的に任意の時点で、当該時点における針位置を実質的に常時検出可能になっていてもよい。標準電波を利用した時刻修正に際して、前者の場合には、一端初期位置に戻した後、修正すべき所定時刻位置に指針を所定角度だけ回転させることになり、後者の場合には、当該時点において標準電波から得られる時刻データと当該時点における実際の指針位置(時刻データ)との差異を、なくすべく、差異に応じた角度だけ各指針を回転させることになる。
【0015】
本発明の電子時計において、典型的には、針位置検出機構が複数の指針の位置を検出するように構成されている。すなわち、例えば、時針の位置を検出する時針位置検出機構及び分針の位置を検出する分針位置検出機構が設けられたり、時針の位置を検出する時針位置検出機構及び分針の位置を検出する分針位置検出機構に加えて、秒針の位置を検出する秒針位置検出機構が設けられが設けられる。
【0016】
【発明の実施の形態】
本発明の好ましい実施の形態のいくつかを添付図面に示した好ましい実施例に基づいて説明する。
【0017】
【実施例】
図1から図3に示したとおり、本発明による好ましい一実施例の針位置検出機構付の電子時計1は、ケース2内において地板3によって支持された文字板4の表側の室5に分針20及び時針50を有する。以下では、説明の簡明化のために、時計1に固定された円筒座標R、θ、Zを採る。但し、円筒座標のZ軸が中心軸線Cに一致し且つ時計の前方を向いているとし、座標の原点が文字板4の表側の表面8に一致するとする。また、角度θは、12時の向きで0とし、且つ時計回りの向きを角度θのプラス方向とする。
【0018】
分針20は、図2からわかるとおり、中心軸線Cのまわりで回転可能な軸部としての分車21の先端部22に取付けられている。分車21は、地板3で支持された中心パイプ6に摺動回転可能に嵌挿され、且つ基端部23において輪列受7により回転自在に支持されている。分車21には、また、分歯車24及び分かな25が取付けられている。
【0019】
例えば、エンジニアリングプラスチックからなる分車21には、例えば、MID(Molded Interconnect Device;三次元射出回路部品)技術により、配線26がインサート成形などによって一体的に形成されている。配線26等が分車21に一体的に三次元形態で組込まれ得る限り、三次元配線等の形成には、プラスチックの多色成形技術ないし射出成形技術等が用いられてもフォトリソグラフィの如き集積回路形成技術等や乾式又は湿式のメッキ技術ないしプレーティング技術などが用いられてもよい。この配線26は、所望の給電線及び信号線を含み、分車21の基端部23の大径部27の端面28において、配線パターン29、30等として露出し、分車21の先端部22の近傍のうち分針20が延びる向きに対面する周面の特定箇所としての側面31において、LEDの如き発光素子のような光源32用の給電端子部33及びフォトトランジスタやフォトダイオードやCCDの如き受光素子のような光検出部34からの信号の入力端子部35として露出している。図2では、端子部33、35がZ方向に繋がっているかの如く示されているけれども、これは図示の便宜ためであって、送信手段としての発光素子32及び受信手段としての受光素子34の夫々に適合するような端子部33、35が側面31に形成されている。なお、配線パターン29、30の接点ないしパッド部には、発光素子32や受光素子34を駆動するための給電ラインをなす導通ばね36及び受光素子34での受光信号の取出ラインをなす導電ばね37等が夫々の接点で接触せしめられている。
【0020】
時針50は、図2からわかるとおり、中心軸線Cのまわりで回転可能な軸部としての時車ないし筒車51の先端部52に取付けられている。時車51は、中心パイプ6に摺動回転可能に嵌装され、時車51の基端部53には、時歯車54が一体的に形成されている。
【0021】
エンジニアリングプラスチックからなる時車51にも、例えば、MID技術により、配線55がインサート成形などにより一体的に形成されている。この配線55も、所望の給電線及び信号線を含み、時車51の基端部53の大径の時歯車54の側面ないし端面56において配線パターン57、58等として露出し、時車51の先端部52の近傍のうち時針50が延びる向きに対面する周面の特定箇所としての側面59において、LEDの如き発光素子のような光源60用の給電端子部61及びフォトトランジスタやフォトダイオードやCCDの如き受光素子のような検出部62からの信号の入力端子部63として露出している。図2において端子部61、63が繋がっているかの如く見えるは図示の便宜ためであり、送信手段としての発光素子60及び受信手段としての受光素子62の夫々に適合するような端子部61、63が側面59に形成されている。配線パターン57、58の接点ないしパッド部にも、発光素子60や受光素子62を駆動するための給電ラインをなす導通ばね64及び受光素子62での受光信号の取出ラインをなす導電ばね65等が夫々の接点で接触せしめられている。
【0022】
図1及び図2からわかるように、時計1の文字板4の前面側の室5内において、分針20は時針50よりも+Z方向にずれている。従って、室5は、図2に示したように、文字板4の表面8から時車51の先端部52及び時針50の前面またはそれよりも少しだけ前方に位置するプラスZ1の面までの領域Hと、領域Hよりも前方で外装ガラス9の背面までの領域Mとからなるとみなし得る。図1及び図2に示した例では、プラスZ1の位置に、ハーフミラーとして働く半透明板11が設けられ、外周縁でケース2に固定されている。
【0023】
但し、領域Mにおいて分車21に取付けられたLEDの如き発光素子32が発し受光素子34で敏感に検出する光の波長域と領域Hにおいて時車51に取付けられた発光素子60が発し受光素子62で敏感に検出する光の波長域とがずれているような場合、例えば、分領域Mで赤色又は青色の波長域の光が発光・検出に用いられ、時領域Hで青色又は赤色の波長域の光が発光・検出に用いられるような場合には、境界のハーフミラー11はなくてもよい。なお、発光素子32、60や受光素子34、62の前面に、所望ならば、カラーフィルタを設けてもよい。更に、ケース2の前面の外装ガラス9に針位置検出に用いる赤色や青色の光に対する反射用コーティング層を形成しておいて、外光の影響すなわち外光によるノイズを最小限に抑えるようにしてもよい。
【0024】
ケース2の内周面12は、時領域H及び分領域Mの夫々において、時針検出用反射面66及び分針検出用反射面38になっている。各反射面38、66は、典型的には、中心軸線Cに垂直な面に対して直角である。但し、例えば、図2に示したように、発光手段32、60と夫々に対応する受光手段34、62とがZ方向にずれた位置にある場合には、Z方向に沿った断面内でみて僅かに傾斜していてもよい。その場合、傾斜の向きは、例えば、反射面38、66で反射された外光が受信手段に直接的に入るのを妨げるように、文字板4の表面8に向かう向きに傾斜される。なお、文字板4の表面8やハーフミラー11の表側表面での反射を最小限に抑え得るように、該表面には所望波長域の光に対する反射防止膜が形成されていてもよい。
【0025】
時針検出用反射面66は、図1の(a)に示したように、中心軸線C又はZ軸に垂直な平面内で見て、相互に30度づつ傾斜した12個の平面Sh1、Sh2、・・・、Sh12からなり、例えば、正X時(丁度X時)において時針50が丁度平面ShXに対して直角に向く。また、文字板4の表面8には、各反射面Shiとこれに隣接する反射面Shi−1、Shi+1との間に、時針用遮光フィン67が設けられている。なお、図1の(a)において、14は、正時を示すべく文字板4の表面8に形成された植え字である。
【0026】
従って、例えば、図1の(a)に示したように、ほぼ10時9分頃である場合、時領域Hの発光素子60から出た光は反射面Sh10で反射されて、その正対の程度に応じて受光素子62で受光される。なお、好ましくは、発光素子60の前面に、発光素子60から出た光を反射面Shiの所で集光するようなレンズ部ないしレンズ層が形成される。一方、他の反射面Sh1〜Sh9及びSh11〜Sh12に迷光が入って反射されても該反射光のうち受光素子62に向かう向きの光が遮光フィン67により遮光され易いので、迷光の影響を受ける虞れが少ない。但し、迷光の影響が無視し得るような場合には、遮光フィン67はなくてもよい。また、例えば、受光素子62の視野を小さくするように光の入射方向を制限する絞り手段(例えばピンホールを有する板)を受光素子62の前面に設けておいてもよい。
【0027】
領域Mにある分針検出用反射面38は、図1の(a)及び(b)では円筒状であるかのごとく示されているけれども、時針検出用反射面66と同様に、相互に一定角度(分領域の場合は、360度/60=6度)づつ傾斜した60個の平面Sm1、・・・Sm60(図示せず)からなり、図1の(a)の平面で見た場合、例えば、丁度Y分において分針20が丁度平面SmYに対して直角に向く。また、半透明板11の表面12には、図1の(b)に示したように、各反射面Smj(図示せず、但し、jは1〜60の間の整数)とこれに隣接する反射面Smj−1、Shmj+1(図示せず)との間に、分針用遮光フィン39が設けられている。なお、図1の(a)からわかるとおり、この例では、時針用遮光フィン67は5つおきに分針用遮光フィン39に重なる。
【0028】
従って、例えば、図1の(a)及び(b)に示したように、ほぼ10時9分頃である場合、分領域Mの発光素子32から出た光は反射面Sm9(図示せず)で反射されて、その正対の程度すなわち真正面から対面する程度に応じて受光素子34で受光される。時針検出用の発光素子60と同様に、発光素子32の前面に、発光素子32から出た光を反射面Smjの所で集光するようなレンズ部ないしレンズ層が形成される。一方、他の反射面Sm1〜Sm8(図示せず)及びSm10〜Sm60(図示せず)に迷光が入って反射されても該反射光のうち受光素子34に向かう向きの光が遮光フィン39により遮光され得るので、迷光の影響を受ける虞れが少ない。但し、迷光の影響を無視し得る場合には遮光フィン39はなくてもよい。また、例えば、受光素子34の視野を狭くするように光の入射方向を制限する絞り手段を受光素子34の前面に設けておいてもよい。
【0029】
分針検出用発光素子32と分針検出用反射面38と分針検出用受光素子34と分針検出用MID配線26と分針検出用導通ばね37とからなる分針検出系15及び時針検出用発光素子60と時針検出用反射面66と時針検出用受光素子62と時針検出用MID配線55と時針検出用導通ばね65とからなる時針検出系16は、夫々、分針20及び時針50の位置を検出し得るように構成されており、分針検出系15及び時針検出系16によって検出された分針20及び時針の位置は、導通ばね37及び65等を介して、図3の分針位置データ格納部81及び時針位置データ格納部82に格納される。この例では、分針検出系15の対面検出手段は、分針検出用発光素子32と分針検出用反射面38と分針検出用受光素子34とからなり、時針検出系16の対面検出手段は、時針検出用発光素子60と時針検出用反射面66と時針検出用受光素子62とからなる。ここで、夫々の対面検出手段が針位置検出機構とみなされ得る。
【0030】
ここで、分針検出用の対面検出手段を構成する発光素子32、反射面38及び受光素子34は、中心軸線Cに垂直で実際上同一の一の平面上に位置し、時針検出用の対面検出手段を構成する時針検出用の発光素子60、反射面66及び受光素子62も、中心軸線Cに垂直で実際上同一の別の一平面上に位置するので、電子時計1の厚さの増加を最小限に抑え得る。なお、ここでは、夫々の発光素子及び受光素子の間のZ方向の長さは無視している。なお、図2において、分針検出用の発光素子32及び受光素子34が中心軸線Cの延在方向に並んでいるかの如く示されているけれども、電子時計1の厚さを最小限にするためには、発光素子32及び受光素子34は、中心軸線Cの延在方向の代わりに周方向に並置される。時針検出用の発光素子60及び受光素子62についても同様で、電子時計1の厚さを最小限にするためには、発光素子60及び受光素子62は、中心軸線Cの延在方向の代わりに周方向に並置される。その場合、発光素子や受光素子は夫々の素子が取付けられている周面の向きと一致する向きではなくてもよく、例えば、発光素子及び受光素子が対応する軸部の表面から比較的大きく突出した状態で且つほぼ面一に並んでいても、又は両者の中間位置を通る半径方向の線が反射面と交差する位置に正対し得るように、相互に90度以下の角度で隣接していてもよい。
【0031】
分針検出系15及び時針検出系16が、夫々、分針20及び時針50の位置を検出し得るようにするために、この例では、例えば、分針検出用反射面38及び時針検出用反射面66が、各位置i、j(i時j分)の反射面Shi、Smjごとに、ユニークな位置情報を与えるように構成される。そのためには、反射面Shiの夫々及び反射面Smjの夫々が、異なる反射率を有していても、例えば、バーコードの如き異なるパターン情報を有していてもよく、また異なる色など他の種類の異なる反射光情報を与えるようになっていてもよい。パターン情報を検出するためには、受光手段としての光検出部33、62は、例えば、CCDのようなパターン情報検出部からなり、該検出部33、62により検出されたパターン情報を導通ばね36及び64を介してパターンデータ処理部に送ってデータを解読するようにしてもよい。
【0032】
また、ケース2のリング部に、反射面38及び66を設ける代わりに、図4に示したように、各反射面36及び66の位置に、送信手段としての分針検出用発光部31からの分針位置表示光を検出する60個の受信手段としての分針検出用光検出部33a(即ち、Dm1、Dm2、・・・、Dmj、・・・、Dm60)及び送信手段としての時針検出用発光部60からの時針位置表示光を検出する12個の受信手段としての時針検出用光検出部62a(即ち、Dh1、Dh2、・・・、Dhi、・・・、Dh12)を設け、各検出部33a、62aで検出した検出信号を、MID配線26、55と同様な配線を介して各針20、50の位置信号として、分針位置データ格納部81及び時針位置データ格納部82に格納するようにしてもよい。この場合にも、ケース2が樹脂などで形成されるときには、配線はMID技術で形成されてもよい。この場合、光信号を検出した光検出部Dmj、Dhiから検出信号が出されるので、検出信号が出された光検出部Dmj、Dhiが特定されることにより、分針位置及び時針位置自体が自動的に特定され得る。
【0033】
この電子時計1は、更に、図3の(a)に示したように、時刻情報を含んだ長波の形態の標準電波を受信する電波受信部84及び該電波受信部で受信した標準電波の時刻情報を解読する時刻情報検出部85を備える。また、針位置調整制御部86は、時針及び分針位置データ格納部82、81に格納されている時針位置データPh及び分針位置データPmと、時刻情報検出部85で解読された標準電波の現在時刻情報WTの時データWTh及び分データWTmとを比較して、差Δh=Ph−WTh及びΔm=Pm−WTmがゼロになるように、モータ87を回転駆動する。モータ87は、分針20と時針50とを即ち分車21と時車51とを独立に回転駆動するようになっていても、分車21を回転駆動することにより、輪列を介して時車51を回転駆動し、分針20及び時針50を全体として回転させるようになっていてもよい。前者の場合、時針50の位置は、分データPmを考慮して、00分の場合よりも、Pm/2(度)だけ時針50の位置をずらすことになる。
【0034】
以上のような電子時計1を組立てる場合、時車51や分車21の所定の接点端子部ないしパッド部61、63や33、35に夫々の発光及び受光素子60及び62や32及び34を実装すると共に、該発光及び受光素子60及び62や32及び34の位置を目印に時針50や分針20を時車51や分車21に取付けることにより、時針50や分針20を、実際上正確に時車51や分車21に取付けることができるので、時針や分針が位置する文字板の表面側とは反対側(裏面側)においてフォトインタラプタ等を組付ける場合と比較して、その組立作業が正確且つ迅速に行われ得、組立工程が簡略化され得る。なお、ケース2の反射面38、66の位置が最初に規定される場合、例えば、該反射面38、66の位置ないし向き(軸線Cのまわりでの周方向の位置ないし向き)に合わせて中心軸線Cのまわりでの文字板4の向きを定め、該文字板4の向きに合せて、時車51及び分車21の向き(従って時針50及び分針20の向き)を合せるようにすればよい。
【0035】
なお、分車21の回転と時車51の回転とが輪列で予め関連付けられているばあいには、例えば、分車21の向きと時車51の向きとが一致する回転位置において、ケース2の12時の向きに合せればよい(ムーブメントの向きとケース2の向きとが関連付けられている場合、12種類の重なり位置のうち、最も適合する位置を選ぶことになるけれども、そのような場合、凡その12時の向きは、その非対称形状から予め判明しているはずであるので、該形状を基準に位置を選べばよい)。
【0036】
以上においては、電子時計1が時針50及び分針20からなるとして説明したけれども、当然ながら、図5に示したように、更に秒針90を有する電子時計1bからなっていてもよい。
【0037】
図5の電子時計1bは、秒針90に加えて、これに関連する秒車などの機械系91、発光部92及び受光部93、ハーフミラー94、MID配線95、並びに導通ばね96、97などの秒針位置検出系17を有する点で、図2に示した電子時計1と異なり、その他の点では、電子時計1と実質的に同様に構成される。なお、当然ながら、図3の(b)に示したように、針位置データ格納部として時針位置データ格納部82及び分針位置データ格納部81に加えて秒針位置データ格納部83を備えると共に、時刻情報検出部85では、標準電波の現在時刻情報WTとして、秒データが00秒になる時点での現在時刻情報WTの時データWTh及び分データWTmに応じて、時針、分針及び秒針位置データ格納部82、81、83に格納されている時針位置データPh、分針位置データPm及び秒針位置データPsと、時刻情報検出部85で解読された00秒時点での標準電波の現在時刻情報WTの時データWTh、分データWTm及び秒データWTs=0とを比較して、差Δh=Ph−WTh、Δm=Pm−WTm及びΔs=Ps−0がゼロになるように、モータ87を回転駆動する。針位置調整に1秒以上の時間を要する場合には、その時間Δt(秒)を予め考慮して、Δt秒後のその時刻に一致するように、秒針90だけでなく分針20や時針50の位置を調整してもよい。
【0038】
この電子時計1bが、秒針90の位置を分針20や時針50の位置と同様に、検出・調整し得る点を除いて、電子時計1と同様に機能し得ることは、明かであろう。
【0039】
なお、電子時計1、1a又は1bにおいて、針20、50等の位置にかかわらず該針20、50等の位置を検出し得るようにする代わりに、例えば、各針20、50等が特定の位置、例えば12時の位置、即ち12時00分00秒において各針20、50等が採るべき回転位置にあること検出するように、例えば、12時の位置にのみ反射面38、66などを設け、他の回転位置では、発光部31、60等から出た光が検出部33、62等で検出されないようにしてもよい。その場合、時針位置データ格納部82や分針位置データ格納部81等はなくてもよく、時刻表示の修正をする場合には、電波修正のために標準電波の受信を開始する前、最中又はその直後に、各針20、50等を一旦初期位置に戻し、その後、時刻情報検出部85で得られる時刻情報に応じた回転位置に、モータ87により、各針20、50などを回転させるようにしてもよい。
【図面の簡単な説明】
【図1】本発明による好ましい一実施例の電子時計を示したもので、(a)は平面説明図、(b)は斜視説明図(但し分針及びその位置検出系を中心に示した)。
【図2】図1の電子時計の一部の断面説明図。
【図3】電子時計の針位置調整機構をしめしたもので、(a)は図1の電子時計の針位置調整機構のブロック図、(b)は図5の電子時計の針位置調整機構のブロック図。
【図4】図1の電子時計の変形例を示したもので、(a)は図1の(a)と同様な平面説明図、(b)は図1の(b)と同様な斜視説明図。
【図5】図3の(b)に示した本発明の別の変形例についての図2と同様な断面説明図。
【符号の説明】
1、1a、1b 電子時計
2 ケース
4 文字板
8 表面
20 分針
21 分車
26 分針位置検出用MID配線
32 分針位置検出用発光素子
34 分針位置検出用受光素子
36、37 導通ばね
38 分針位置検出用反射面
50 時針
51 時車(筒車)
55 分針位置検出用MID配線
60 分針位置検出用発光素子
62 分針位置検出用受光素子
64、65 導通ばね
66 分針位置検出用反射面
90 秒針
92 分針位置検出用発光素子
93 分針位置検出用受光素子
96、97 導通ばね
C 中心軸線
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electronic timepiece, and more particularly, to an electronic timepiece provided with a hand position detecting mechanism.
[0002]
[Prior art]
2. Description of the Related Art There is known a radio-controlled timepiece that receives a standard radio wave including time information and corrects the display time of a hand according to the time information of the standard radio wave. In this radio-controlled timepiece, when correcting the position of the hands according to the time information, for example, the hands are temporarily returned to the initial position, and the hands are moved from the initial position to the corrected position. In order to accurately return the hands to the initial position, it is necessary to accurately detect that the hands are at the initial position. Therefore, the radio-controlled timepiece conventionally includes a hand position detecting mechanism.
[0003]
A conventional hand position detecting mechanism of the type that returns the hands to the initial position when the time is adjusted by the standard radio wave typically rotates in conjunction with the rotation of the hands as disclosed in Japanese Patent Application Laid-Open No. 10-300869. A rotating body is provided on the back side of the dial, and on the back side of the dial, there is provided a set of rotational position detecting means facing each other in a direction parallel to the axis of the rotating body.
[0004]
[Problems to be solved by the invention]
However, in an electronic timepiece having a conventional hand position detecting mechanism of this kind, it is necessary to provide a rotating body and its rotational position detecting means on the back side of the dial, while there is a pointer on the front side of the dial. Therefore, it is not easy to align with the pointer at the time of mounting. Therefore, when the rotation position detection means detects or determines that the initial position has been reached, the actual pointer position at that time is visually determined as a position shift, and the position shift is stored as shift data in the nonvolatile memory. Using the deviation data as an offset value, it is necessary to correct (re-set) the display time using the hands.
[0005]
In addition, in an electronic timepiece equipped with this kind of conventional hand position detection mechanism, the hands and the rotating body are provided at positions overlapping in the axial direction, so that the electronic timepiece is easily made thicker. Easy to do.
[0006]
SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to provide an electronic timepiece in which positioning can be easily performed when assembling a hand position detecting mechanism.
[0007]
[Means for Solving the Problems]
The electronic timepiece of the present invention is an electronic timepiece provided with a hand position detection mechanism for detecting a rotation position of a time display hand, in order to achieve the above-mentioned object. The part to be positioned is located on the front side of the dial. It is preferable that substantially all of the portions to be positioned with respect to the dial are arranged on the front side of the dial.
[0008]
In the electronic timepiece of the present invention, "substantially all of the hand position detection mechanism to be positioned with respect to the dial is arranged on the front side of the dial", so that the relative position with respect to the dial can be visually checked. The positioning of the relevant portion of the needle position detecting mechanism can be performed while the needle position detecting mechanism is being assembled.
[0009]
Therefore, the offset data for correcting the deviation of the pointer position as described in JP-A-10-300869 does not have to be stored in the nonvolatile memory. However, when the strictness is required, offset data for correcting the deviation of the pointer position may be stored in the nonvolatile memory. In the case where the electronic timepiece has a backup battery, the clock data inside the electronic timepiece or the timekeeping data backup battery can be maintained even when the battery for driving the motor of the electronic timepiece is replaced. Therefore, the clock data or timekeeping data inside the electronic timepiece may be corrected.
[0010]
Substantially all parts of the hand position detecting mechanism to be positioned with respect to the dial typically comprise a set of face-to-face detection means, but in some cases, the relevant parts may be identified instead of facing. May be in a state having a specific positional relationship such as an angular relationship.
[0011]
That is, in the electronic timepiece of the present invention, the hand position detecting mechanism is typically such that a specific portion of the concave portion of the outer case on the peripheral surface on the front side of the dial and the pointer are integrally attached to the tip portion. A set of face-to-face detection means is provided at a specific location on the peripheral surface of a portion of the shaft located on the front side of the dial, to detect that the two locations are facing each other.
[0012]
Therefore, in the electronic timepiece of the present invention, since the relevant portion of the hand position detection mechanism expands in the radial direction instead of the thickness direction of the timepiece, the electronic timepiece is less likely to become thick. However, in some cases, at least one of the dial and the front glass may be provided to detect the position of the hands.
[0013]
Furthermore, in the electronic timepiece of the present invention,
(1) A set of face-to-face detection means includes a transmission / reception means and a reflection means, and the transmission / reception means includes a signal transmission part and a signal reception part. The reflection means is provided when the reflection means faces the transmission / reception means. Even if it is configured to reflect the signal from the signal transmitting unit toward the signal receiving unit,
(2) Even if the set of face-to-face detection means includes a transmission means and a reception means, and the reception means is configured to receive a signal from the transmission means when the reception means faces the transmission means, Good.
Here, the transmitted / received signal typically comprises an optical signal. However, if desired, other types of signals (such as ultrasonic signals) may be used.
[0014]
The needle position detection mechanism is capable of substantially always detecting the needle position at that time at substantially any time, even if it detects that the pointer has reached a specific position (initial position). It may be. In the case of time correction using the standard radio wave, in the former case, after returning to the initial position once, the hands are rotated by a predetermined angle to the predetermined time position to be corrected, and in the latter case, at the time, In order to eliminate the difference between the time data obtained from the standard radio wave and the actual hand position (time data) at the time, each hand is rotated by an angle corresponding to the difference.
[0015]
In the electronic timepiece of the present invention, typically, the hand position detecting mechanism is configured to detect the positions of a plurality of hands. That is, for example, an hour hand position detection mechanism that detects the position of the hour hand and a minute hand position detection mechanism that detects the position of the minute hand are provided, or an hour hand position detection mechanism that detects the position of the hour hand and minute hand position detection that detects the position of the minute hand are provided. In addition to the mechanism, a second hand position detection mechanism for detecting the position of the second hand is provided.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Some preferred embodiments of the present invention will be described based on preferred embodiments shown in the accompanying drawings.
[0017]
【Example】
As shown in FIGS. 1 to 3, an electronic timepiece 1 with a hand position detecting mechanism according to a preferred embodiment of the present invention has a minute hand 20 in a front chamber 5 of a dial 4 supported by a main plate 3 in a case 2. And an hour hand 50. In the following, cylindrical coordinates R, θ, and Z fixed to the timepiece 1 are used for simplification of description. However, it is assumed that the Z axis of the cylindrical coordinates coincides with the center axis C and faces forward of the timepiece, and the origin of the coordinates coincides with the front surface 8 of the dial 4. The angle θ is 0 at 12:00, and the clockwise direction is the plus direction of the angle θ.
[0018]
As can be seen from FIG. 2, the minute hand 20 is attached to a distal end portion 22 of a minute wheel 21 as a shaft portion rotatable around a central axis C. The separation wheel 21 is slidably fitted into the center pipe 6 supported by the main plate 3, and is rotatably supported by the train wheel bridge 7 at the base end 23. The minute wheel 21 and the minute pinion 25 are also attached to the minute wheel 21.
[0019]
For example, a wiring 26 is integrally formed on the branching wheel 21 made of engineering plastic by insert molding or the like by MID (Molded Interconnect Device; three-dimensional injection circuit component) technology, for example. As long as the wiring 26 and the like can be integrated into the branching wheel 21 in a three-dimensional form, the formation of the three-dimensional wiring and the like can be achieved by integration such as photolithography even if plastic multicolor molding technology or injection molding technology is used. A circuit forming technique, a dry or wet plating technique, a plating technique, or the like may be used. The wiring 26 includes desired power supply lines and signal lines, and is exposed as wiring patterns 29, 30, etc. on the end surface 28 of the large-diameter portion 27 of the base end 23 of the shunt 21, and , A power supply terminal portion 33 for a light source 32 such as a light emitting element such as an LED, and a light receiving terminal such as a phototransistor, a photodiode, or a CCD on a side surface 31 as a specific portion of a peripheral surface facing the direction in which the minute hand 20 extends in the vicinity of. It is exposed as an input terminal section 35 for a signal from a light detection section 34 such as an element. In FIG. 2, although the terminal portions 33 and 35 are shown as if they are connected in the Z direction, this is for convenience of illustration, and the light emitting element 32 as the transmitting means and the light receiving element 34 as the receiving means are shown. Terminal portions 33 and 35 suitable for each are formed on the side surface 31. At the contact points or pad portions of the wiring patterns 29 and 30, conductive springs 36 serving as power supply lines for driving the light emitting elements 32 and the light receiving elements 34 and conductive springs 37 serving as a line for taking out light receiving signals at the light receiving elements 34 are provided. Etc. are brought into contact with respective contact points.
[0020]
As can be seen from FIG. 2, the hour hand 50 is attached to a distal end portion 52 of an hour wheel or an hour wheel 51 as a shaft portion rotatable around a center axis C. The hour wheel 51 is slidably fitted to the center pipe 6, and an hour gear 54 is integrally formed at a base end 53 of the hour wheel 51.
[0021]
The hour wheel 51 made of engineering plastic is also integrally formed with the wiring 55 by insert molding or the like by MID technology, for example. The wiring 55 also includes desired power supply lines and signal lines, and is exposed as a wiring pattern 57, 58, etc. on the side surface or end surface 56 of the large-diameter hour gear 54 at the base end 53 of the hour wheel 51. A power supply terminal 61 for a light source 60 such as a light-emitting element such as an LED, and a phototransistor, a photodiode, a CCD, etc. on a side surface 59 as a specific portion of a peripheral surface facing the direction in which the hour hand 50 extends in the vicinity of the distal end portion 52. It is exposed as an input terminal 63 for a signal from the detector 62 such as a light receiving element. In FIG. 2, the appearance that the terminal portions 61 and 63 are connected to each other is for convenience of illustration, and the terminal portions 61 and 63 are adapted to the light emitting element 60 as the transmitting means and the light receiving element 62 as the receiving means, respectively. Are formed on the side surface 59. Also at the contact points or pad portions of the wiring patterns 57 and 58, a conductive spring 64 serving as a power supply line for driving the light emitting element 60 and the light receiving element 62, and a conductive spring 65 serving as a line for taking out a light receiving signal at the light receiving element 62 are provided. The contact is made at each contact.
[0022]
As can be seen from FIGS. 1 and 2, the minute hand 20 is shifted in the + Z direction from the hour hand 50 in the chamber 5 on the front side of the dial 4 of the timepiece 1. Therefore, as shown in FIG. 2, the chamber 5 is a region from the surface 8 of the dial 4 to the front end portion 52 of the hour wheel 51 and the front surface of the hour hand 50 or a surface of plus Z1 located slightly ahead of the front surface. H and a region M in front of the region H and up to the rear surface of the exterior glass 9. In the example shown in FIGS. 1 and 2, a translucent plate 11 serving as a half mirror is provided at the position of plus Z1 and fixed to the case 2 at the outer peripheral edge.
[0023]
However, in a region M, a light emitting element 32 such as an LED mounted on the minute wheel 21 emits light, and in a region H, a light emitting element 60 mounted on the hour wheel 51 emits light and a light receiving element sensitively detected by the light receiving element 34. If the wavelength range of light to be detected sensitively at 62 is shifted, for example, light in the red or blue wavelength range is used for light emission and detection in the sub-domain M, and the blue or red wavelength in the time domain H When the light in the region is used for light emission / detection, the half mirror 11 at the boundary may not be provided. If desired, a color filter may be provided on the front surface of the light emitting elements 32 and 60 and the light receiving elements 34 and 62. Further, a coating layer for reflecting red or blue light used for detecting a needle position is formed on the exterior glass 9 on the front surface of the case 2 so that the influence of external light, that is, noise due to external light is minimized. Is also good.
[0024]
The inner peripheral surface 12 of the case 2 is an hour hand detecting reflecting surface 66 and a minute hand detecting reflecting surface 38 in the hour region H and the minute region M, respectively. Each reflective surface 38, 66 is typically perpendicular to a plane perpendicular to the central axis C. However, for example, as shown in FIG. 2, when the light-emitting units 32 and 60 and the corresponding light-receiving units 34 and 62 are located at positions displaced in the Z-direction, see in a cross section along the Z-direction. It may be slightly inclined. In this case, the direction of the inclination is, for example, inclined toward the surface 8 of the dial 4 so as to prevent external light reflected by the reflection surfaces 38 and 66 from directly entering the receiving means. Note that an antireflection film for light in a desired wavelength range may be formed on the surface 8 of the dial 4 or the front surface of the half mirror 11 so that reflection on the front surface can be minimized.
[0025]
As shown in FIG. 1A, the hour hand detecting reflection surface 66 has twelve planes Sh1, Sh2, and 30 degrees inclined with respect to each other when viewed in a plane perpendicular to the central axis C or the Z axis. .., Sh12. For example, at the regular X time (just X time), the hour hand 50 is oriented just perpendicular to the plane ShX. The hour hand light-blocking fins 67 are provided on the front surface 8 of the dial 4 between each reflection surface Shi and the reflection surfaces Shi-1 and Shi + 1 adjacent thereto. In FIG. 1A, reference numeral 14 denotes a typesetting character formed on the surface 8 of the dial 4 to indicate the hour.
[0026]
Therefore, for example, as shown in FIG. 1A, at about 10: 9, light emitted from the light-emitting element 60 in the time region H is reflected by the reflection surface Sh10, and the light of the light-emitting element 60 is directly opposed to the light. Light is received by the light receiving element 62 according to the degree. Preferably, a lens portion or a lens layer is formed on the front surface of the light emitting element 60 so as to condense the light emitted from the light emitting element 60 at the reflection surface Shi. On the other hand, even if stray light enters and is reflected by the other reflecting surfaces Sh1 to Sh9 and Sh11 to Sh12, the reflected light directed toward the light receiving element 62 is likely to be shielded by the light shielding fins 67, and thus is affected by the stray light. There is little fear. However, when the influence of the stray light can be ignored, the light-blocking fins 67 need not be provided. Further, for example, a diaphragm means (for example, a plate having a pinhole) for limiting the incident direction of light so as to reduce the field of view of the light receiving element 62 may be provided on the front surface of the light receiving element 62.
[0027]
Although the minute hand detecting reflecting surface 38 in the area M is shown as a cylindrical shape in FIGS. 1A and 1B, the minute hand detecting reflecting surface 38 has a fixed angle with respect to each other similarly to the hour hand detecting reflecting surface 66. (In the case of the minute area, 360 degrees / 60 = 6 degrees), each of which is composed of 60 planes Sm1,... Sm60 (not shown) that are inclined, and when viewed in the plane of FIG. , The minute hand 20 is oriented at right angles to the plane SmY at exactly Y minutes. Further, as shown in FIG. 1B, the surface 12 of the translucent plate 11 is adjacent to each reflection surface Smj (not shown, where j is an integer between 1 and 60). A minute hand light-blocking fin 39 is provided between the reflection surfaces Smj-1 and Shmj + 1 (not shown). In addition, as can be seen from FIG. 1A, in this example, the light shielding fins 67 for the hour hand overlap with the light shielding fins 39 for the minute hand every fifth.
[0028]
Therefore, for example, as shown in FIGS. 1A and 1B, when the time is about 10: 9, the light emitted from the light emitting element 32 in the separation area M is reflected by the reflection surface Sm9 (not shown). And is received by the light receiving element 34 in accordance with the degree of facing, that is, the degree of facing from the front. Similarly to the light emitting element 60 for detecting the hour hand, a lens portion or a lens layer is formed on the front surface of the light emitting element 32 so as to condense the light emitted from the light emitting element 32 at the reflection surface Smj. On the other hand, even if stray light enters and is reflected by the other reflecting surfaces Sm1 to Sm8 (not shown) and Sm10 to Sm60 (not shown), light of the reflected light directed toward the light receiving element 34 is transmitted by the light shielding fin 39. Since the light can be shielded, there is little risk of being affected by stray light. However, when the influence of the stray light can be ignored, the light-blocking fin 39 may not be provided. Further, for example, a diaphragm means for limiting the incident direction of light so as to narrow the field of view of the light receiving element 34 may be provided on the front surface of the light receiving element 34.
[0029]
Minute hand detection system 15, hour hand detection light emitting element 60, hour hand and hour hand detection light emitting element 32, minute hand detection reflective surface 38, minute hand detection light receiving element 34, minute hand detection MID wiring 26, and minute hand detection conduction spring 37. The hour hand detection system 16 including the detection reflection surface 66, the hour hand detection light receiving element 62, the hour hand detection MID wiring 55, and the hour hand detection conduction spring 65 is configured to detect the positions of the minute hand 20 and the hour hand 50, respectively. The positions of the minute hand 20 and the hour hand detected by the minute hand detection system 15 and the hour hand detection system 16 are stored in the minute hand position data storage unit 81 and the hour hand position data storage of FIG. It is stored in the unit 82. In this example, the facing detecting means of the minute hand detecting system 15 includes the light emitting element 32 for detecting the minute hand, the reflecting surface 38 for detecting the minute hand, and the light receiving element 34 for detecting the minute hand. The light-emitting element 60 includes a light-emitting element 60, a reflection surface 66 for hour hand detection, and a light receiving element 62 for hour hand detection. Here, each face-to-face detection means can be regarded as a needle position detection mechanism.
[0030]
Here, the light emitting element 32, the reflecting surface 38, and the light receiving element 34 which constitute the face detecting means for minute hand detection are located on one and substantially the same plane perpendicular to the central axis C, and face to face detection for hour hand detection. The light emitting element 60 for detecting the hour hand, the reflecting surface 66 and the light receiving element 62 which constitute the means are also located on another plane which is substantially perpendicular to the central axis C and is actually the same, so that the thickness of the electronic timepiece 1 can be increased. Can be minimized. Here, the length in the Z direction between each light emitting element and each light receiving element is ignored. In FIG. 2, although the light emitting element 32 and the light receiving element 34 for minute hand detection are shown as being arranged in the extending direction of the central axis C, in order to minimize the thickness of the electronic timepiece 1 The light emitting element 32 and the light receiving element 34 are arranged side by side in the circumferential direction instead of the extending direction of the central axis C. The same applies to the light emitting element 60 and the light receiving element 62 for detecting the hour hand. In order to minimize the thickness of the electronic timepiece 1, the light emitting element 60 and the light receiving element 62 are replaced with the central axis C instead of the extending direction. They are juxtaposed in the circumferential direction. In this case, the light emitting element and the light receiving element do not have to be in the same direction as the direction of the peripheral surface on which the respective elements are mounted, for example, the light emitting element and the light receiving element protrude relatively largely from the surface of the corresponding shaft portion. Even if they are aligned and substantially flush with each other, or they are adjacent to each other at an angle of 90 degrees or less so that a radial line passing through an intermediate position between them can directly face a position intersecting the reflecting surface. Is also good.
[0031]
In order to enable the minute hand detecting system 15 and the hour hand detecting system 16 to detect the positions of the minute hand 20 and the hour hand 50, respectively, in this example, for example, the minute hand detecting reflecting surface 38 and the hour hand detecting reflecting surface 66 are provided. , Is configured to give unique position information to each of the reflecting surfaces Shi and Smj at the positions i and j (i: j). For that purpose, each of the reflection surfaces Shi and each of the reflection surfaces Smj may have different reflectances, for example, may have different pattern information such as bar codes, and may have other colors such as different colors. Different types of reflected light information may be provided. In order to detect the pattern information, the light detectors 33 and 62 as light receiving means include, for example, a pattern information detector such as a CCD, and transmit the pattern information detected by the detectors 33 and 62 to a conductive spring 36. Alternatively, the data may be sent to the pattern data processing unit via the data processing unit 64 to decode the data.
[0032]
Further, instead of providing the reflecting surfaces 38 and 66 on the ring portion of the case 2, as shown in FIG. 4, the minute hand from the minute hand detecting light emitting unit 31 as a transmitting means is provided at the position of each reflecting surface 36 and 66. The minute hand detecting light detecting unit 33a (ie, Dm1, Dm2,..., Dmj,..., Dm60) as the 60 receiving means for detecting the position indicating light and the hour hand detecting light emitting unit 60 as the transmitting means. , Dhi1,..., Dh12 as twelve receiving means for detecting hour hand position indicating light from The detection signal detected at 62a may be stored in the minute hand position data storage unit 81 and the hour hand position data storage unit 82 as position signals of the hands 20 and 50 via wiring similar to the MID wirings 26 and 55. Good. Also in this case, when the case 2 is formed of resin or the like, the wiring may be formed by MID technology. In this case, since the detection signal is output from the light detection units Dmj and Dhi that have detected the optical signal, the minute hand position and the hour hand position themselves are automatically determined by specifying the light detection units Dmj and Dhi from which the detection signals are output. Can be specified.
[0033]
The electronic timepiece 1 further includes, as shown in FIG. 3A, a radio wave receiving section 84 for receiving a standard radio wave in the form of a long wave including time information, and a time of the standard radio wave received by the radio wave receiving section. A time information detection unit 85 for decoding information is provided. The hand position adjustment control unit 86 also stores the hour hand position data Ph and the minute hand position data Pm stored in the hour hand and minute hand position data storage units 82 and 81, and the current time of the standard radio signal decoded by the time information detection unit 85. The motor 87 is driven to rotate so that the differences Δh = Ph−WTh and Δm = Pm−WTm become zero by comparing the hour data WTh and the minute data WTm of the information WT. Even if the motor 87 drives the minute hand 20 and the hour hand 50 independently, that is, the minute wheel 21 and the hour wheel 51, the motor 87 rotates the minute wheel 21 through the wheel train to rotate the minute wheel 21. The minute hand 51 and the hour hand 50 may be rotated as a whole by rotating the 51. In the former case, the position of the hour hand 50 is shifted by Pm / 2 (degrees) compared to the case of 00 minutes in consideration of the minute data Pm.
[0034]
When assembling the electronic timepiece 1 as described above, the light emitting and receiving elements 60, 62, 32, and 34 are mounted on predetermined contact terminal portions or pad portions 61, 63, 33, and 35 of the hour wheel 51 and the minute wheel 21. At the same time, the hour hand 50 and the minute hand 20 are attached to the hour wheel 51 and the minute wheel 21 by using the positions of the light emitting and receiving elements 60 and 62, 32 and 34 as markers, so that the hour hand 50 and the minute hand 20 Since it can be attached to the wheel 51 or the minute wheel 21, the assembling work is more accurate than the case where a photo interrupter or the like is mounted on the opposite side (back side) of the dial where the hour hand and minute hand are located. And it can be performed quickly and the assembly process can be simplified. When the positions of the reflecting surfaces 38 and 66 of the case 2 are initially defined, for example, the center is adjusted to the position or direction of the reflecting surfaces 38 and 66 (the position or direction in the circumferential direction around the axis C). The direction of the dial 4 around the axis C is determined, and the directions of the hour wheel 51 and the minute wheel 21 (therefore, the directions of the hour hand 50 and the minute hand 20) may be adjusted in accordance with the direction of the dial 4. .
[0035]
In addition, when the rotation of the minute wheel 21 and the rotation of the hour wheel 51 are associated in advance in a wheel train, for example, at a rotation position where the direction of the minute wheel 21 and the direction of the hour wheel 51 match, (If the direction of the movement and the direction of the case 2 are associated with each other, the most suitable position is selected from the 12 types of overlapping positions. In this case, since the direction at about 12:00 should have been known in advance from the asymmetric shape, the position may be selected based on the shape.)
[0036]
In the above description, the electronic timepiece 1 is described as including the hour hand 50 and the minute hand 20. However, as a matter of course, the electronic timepiece 1b may further include the second hand 90 as shown in FIG.
[0037]
The electronic timepiece 1b of FIG. 5 includes, in addition to the second hand 90, a mechanical system 91 such as a second hand associated therewith, a light emitting unit 92 and a light receiving unit 93, a half mirror 94, an MID wiring 95, and conduction springs 96 and 97. The electronic timepiece 1 is different from the electronic timepiece 1 shown in FIG. 2 in that the electronic timepiece 1 has a second hand position detection system 17, and is otherwise substantially the same as the electronic timepiece 1. Of course, as shown in FIG. 3B, a second hand position data storage unit 83 is provided as a hand position data storage unit in addition to the hour hand position data storage unit 82 and the minute hand position data storage unit 81. The information detecting unit 85 stores the hour hand, minute hand, and second hand position data storage as the current time information WT of the standard time signal according to the hour data WTh and the minute data WTm of the current time information WT at the time when the second data becomes 00 seconds. The hour hand position data Ph, minute hand position data Pm, and second hand position data Ps stored in 82, 81, and 83, and the time data of the current time information WT of the standard radio wave at 00 seconds decoded by the time information detecting unit 85 WTh, minute data WTm and second data WTs = 0 are compared with each other so that the differences Δh = Ph−WTh, Δm = Pm−WTm and Δs = Ps−0 become zero. 87 is driven to rotate. If it takes more than one second for the hand position adjustment, the time Δt (second) is considered in advance and not only the second hand 90 but also the minute hand 20 and the hour hand 50 are adjusted so as to coincide with the time after Δt seconds. The position may be adjusted.
[0038]
It will be apparent that the electronic timepiece 1b can function similarly to the electronic timepiece 1 except that the position of the second hand 90 can be detected and adjusted in the same manner as the positions of the minute hand 20 and the hour hand 50.
[0039]
In the electronic timepiece 1, 1a, or 1b, instead of enabling the positions of the hands 20, 50, etc. to be detected regardless of the positions of the hands 20, 50, etc., for example, each hand 20, 50, etc. For example, the reflection surfaces 38, 66, etc. are only provided at the 12 o'clock position so as to detect that the hands 20, 50, etc. are at the rotational positions to be taken at the 12 o'clock position, i.e., 12:00:00. The light emitted from the light emitting units 31, 60, etc. may not be detected by the detection units 33, 62, etc. at other rotational positions. In that case, the hour hand position data storage unit 82 and the minute hand position data storage unit 81 may not be provided, and when correcting the time display, before, during, or during reception of the standard radio wave for radio wave correction. Immediately after that, the hands 20, 50, etc. are returned to the initial position once, and thereafter, the hands 87, 50, etc. are rotated by the motor 87 to the rotation position corresponding to the time information obtained by the time information detecting unit 85. It may be.
[Brief description of the drawings]
FIGS. 1A and 1B show an electronic timepiece according to a preferred embodiment of the present invention, wherein FIG. 1A is an explanatory plan view, and FIG. 1B is a perspective explanatory view (however, mainly showing a minute hand and its position detection system).
FIG. 2 is an explanatory sectional view of a part of the electronic timepiece of FIG. 1;
3A and 3B show a hand position adjusting mechanism of the electronic timepiece, wherein FIG. 3A is a block diagram of the hand position adjusting mechanism of the electronic timepiece shown in FIG. 1, and FIG. 3B is a block diagram of the hand position adjusting mechanism of the electronic timepiece shown in FIG. Block Diagram.
4A and 4B show a modified example of the electronic timepiece of FIG. 1, wherein FIG. 4A is a plan view similar to FIG. 1A and FIG. 4B is a perspective view similar to FIG. FIG.
FIG. 5 is an explanatory sectional view similar to FIG. 2, showing another modification of the present invention shown in FIG. 3 (b).
[Explanation of symbols]
1, 1a, 1b electronic clock
2 cases
4 Dial
8 surface
20 minute hand
21 minutes by car
26 MID wiring for minute hand position detection
Light emitting element for 32 minute hand position detection
34 light receiving element for detecting minute hand position
36, 37 Conductive spring
38 Reflection surface for minute hand position detection
50 hour hand
51 o'clock (hour wheel)
55 minute hand position detection MID wiring
Light emitting element for 60 minute hand position detection
62 minute hand position detection light receiving element
64, 65 conduction spring
66 Reflection surface for minute hand position detection
90 second hand
Light emitting element for 92 minute hand position detection
93 minute hand position detection light receiving element
96, 97 conduction spring
C center axis

Claims (5)

時刻表示用の指針の回転位置を検出するための針位置検出機構を備えた電子時計であって、前記針位置検出機構のうち文字板に対して位置決めされるべき部分が前記文字板の表面側に配置されている電子時計。An electronic timepiece provided with a hand position detecting mechanism for detecting a rotation position of a time display hand, wherein a part of the hand position detecting mechanism to be positioned with respect to the dial is a front side of the dial. Electronic clock that is located in the. 前記針位置検出機構は、外装ケースの凹部のうち前記文字板の表面側の周面の特定箇所と、指針が先端部に一体的に取りつけられた軸部のうち前記文字板の表面側に位置する部分の周面の特定箇所とに、該二つの箇所が相互に対面位置にあることを検出する一組の対面検出手段を備える請求項1に記載の電子時計。The needle position detecting mechanism is located at a specific location on the front surface side of the dial in the concave portion of the outer case, and on a front surface of the dial of a shaft portion having a pointer integrally attached to a front end thereof. 2. The electronic timepiece according to claim 1, further comprising a set of face-to-face detection means for detecting that the two places are located at the face-to-face position at a specific location on the peripheral surface of the portion to be contacted. 前記一組の対面検出手段が、送受信手段と反射手段とからなり、前記送受信手段が信号送信部及び信号受信部を含み、前記反射手段は、前記反射手段が前記送受信手段に対面した際、前記送受信手段の前記信号送信部からの信号を前記信号受信部に向かって反射するように構成されている請求項2に記載の電子時計。The set of face-to-face detection means includes a transmission / reception means and a reflection means, and the transmission / reception means includes a signal transmission unit and a signal reception unit.When the reflection means faces the transmission / reception means, The electronic timepiece according to claim 2, wherein the electronic timepiece is configured to reflect a signal from the signal transmission unit of the transmission / reception unit toward the signal reception unit. 前記一組の対面検出手段が、送信手段と受信手段とからなり、前記受信手段は、前記受信手段が前記送信手段に対面した際、前記送信手段からの信号を受信するように構成されている請求項2に記載の電子時計。The set of face-to-face detection means includes a transmission means and a reception means, and the reception means is configured to receive a signal from the transmission means when the reception means faces the transmission means. The electronic timepiece according to claim 2. 前記針位置検出機構が複数の指針の位置を検出するように構成されている請求項1から4までのいずれか一つの項に記載の電子時計。The electronic timepiece according to any one of claims 1 to 4, wherein the hand position detecting mechanism is configured to detect positions of a plurality of hands.
JP2002234677A 2002-08-12 2002-08-12 Electronic clock Pending JP2004077177A (en)

Priority Applications (1)

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JP2002234677A JP2004077177A (en) 2002-08-12 2002-08-12 Electronic clock

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Publication Number Publication Date
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Family

ID=32019418

Family Applications (1)

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Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006118966A (en) * 2004-10-21 2006-05-11 Seiko Epson Corp Timepiece with calendar display function
KR101353066B1 (en) * 2012-06-13 2014-01-20 주식회사 코리아하이텍 Time correction apparatus and method of analogue watch

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006118966A (en) * 2004-10-21 2006-05-11 Seiko Epson Corp Timepiece with calendar display function
KR101353066B1 (en) * 2012-06-13 2014-01-20 주식회사 코리아하이텍 Time correction apparatus and method of analogue watch

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