JP2573909B2 - Electronic clock - Google Patents
Electronic clockInfo
- Publication number
- JP2573909B2 JP2573909B2 JP8673494A JP8673494A JP2573909B2 JP 2573909 B2 JP2573909 B2 JP 2573909B2 JP 8673494 A JP8673494 A JP 8673494A JP 8673494 A JP8673494 A JP 8673494A JP 2573909 B2 JP2573909 B2 JP 2573909B2
- Authority
- JP
- Japan
- Prior art keywords
- power
- secondary battery
- switching element
- voltage
- generator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electromechanical Clocks (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】本発明は、充電可能な電源を有す
る電子時計の発電効率及び充電効率の改良に関する。The present invention relates to an improvement in power generation efficiency and charging efficiency with electronic time meter rechargeable power supply.
【０００２】[0002]
【従来の技術】図２に従来例を示す。太陽電池１の電気
エネルギーは順方向のダイオード２を介して二次電池３
に流れるになっている。この場合、タイオード２は、太
陽電他１の電位が二次電池３よりも低いときに、二次電
池３から太陽電池１に流れる電流（ロス電流）を防止す
るために設けられた逆流防止用のダイオードである。電
池電圧検出回路４は二次電池３が充電され過ぎてその電
圧が過充電防止電圧（例えば２．４Ｖ）になると、その
出力により、太陽電池１に対して並列接続されているＭ
ＯＳトランジスタ５をＯＮさせ、太陽電池１を短絡して
放電回路を形成し、太陽電池１の電位を下げて過充電を
防止するものである。BACKGROUND OF THE INVENTION show the Supporting come example is shown in Figure 2. The electric energy of the solar cell 1 is supplied to the secondary battery 3 via the diode 2 in the forward direction.
It is supposed to flow to In this case, the diode 2 is provided for preventing a current (loss current) flowing from the secondary battery 3 to the solar battery 1 when the potential of the solar battery 1 is lower than that of the secondary battery 3. Diode. When the secondary battery 3 is overcharged and its voltage reaches the overcharge prevention voltage (for example, 2.4 V), the battery voltage detection circuit 4 outputs the M connected in parallel to the solar cell 1 by the output.
The OS transistor 5 is turned on, the solar cell 1 is short-circuited to form a discharge circuit, and the potential of the solar cell 1 is reduced to prevent overcharging.
【０００３】なお６は、二次電池３の電気エネルギーで
駆動される発振回路・分周回路よりなる周知の時計回路
である。また７は、時刻を表示する表示装置である。電
池電圧検出回路４は常時動作させていると大きな電力を
消費するため、一定周期（例えば１秒）で間欠駆動す
る。Reference numeral 6 denotes a well-known clock circuit including an oscillation circuit and a frequency dividing circuit driven by the electric energy of the secondary battery 3. Reference numeral 7 denotes a display device for displaying time. Since the battery voltage detection circuit 4 consumes a large amount of power when it is constantly operated, it is intermittently driven at a constant cycle (for example, 1 second).
【０００４】[0004]
【発明が解決しようとする課題】しかし、前述の従来技
術では二次電池３に図３に示すような充電内部抵抗が存
在するため、太陽電池１に光が照射していると、電圧検
出回路４は図４に示すように過充電防止電圧Ｖ1に達し
ていると誤判断し、時間ｔ1よりＭＯＳトランジスタ５
を短絡してしまい、次の電圧サンプリング時間までその
状態を持続する。すると二次電池電圧は図４に示すよう
にＶ2まで急激に電圧が低下し、時計回路の誤動作や、
表示不良を発生してしまう。However, in the above-described prior art, since the secondary battery 3 has a charging internal resistance as shown in FIG. 4 is a mis judged reached overcharge prevention voltages V 1 as shown in FIG. 4, MOS transistors 5 than the time t 1
Is short-circuited, and that state is maintained until the next voltage sampling time. Then the secondary battery voltage is suddenly voltage to V 2 decreases as shown in FIG. 4, malfunctions and the clock circuit,
Display defects occur.
【０００５】また、図８に示すように、永久磁石とコイ
ルによりなる交流発電機等では、ＭＯＳトランジスタ５
のドレイン・ソース間に寄生ダイオード５１が形成され
ていることにより、スイッチング素子５が短絡されてい
ないときにも逆方向に交流発電機に電流が流れ、交流発
電機に逆起電力が発生するため、発電効率が落ちてしま
うという課題があった。 As shown in FIG. 8, in an AC generator or the like comprising a permanent magnet and a coil, a MOS transistor 5 is used.
Since the parasitic diode 51 is formed between the drain and the source, a current flows in the AC generator in the reverse direction even when the switching element 5 is not short-circuited, and a back electromotive force is generated in the AC generator. However, there is a problem that power generation efficiency is reduced .
【０００６】本発明の目的は、上記課題を解決し、交流
発電装置からリミッタ防止ＭＯＳトランジスタを経由し
ての逆流による交流発電装置の逆起電力発生を防止し、
二次電池から交流発電装置への逆流を防止し、発電ロス
及び二次電池の充電ロスを防止し、発電効率と充電効率
を向上する電子時計をもたらすことにある。SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to prevent the generation of back electromotive force in an AC power generator due to backflow from the AC power generator via a limiter prevention MOS transistor.
An object of the present invention is to provide an electronic timepiece that prevents backflow from a secondary battery to an AC power generation device, prevents power generation loss and charging loss of the secondary battery, and improves power generation efficiency and charging efficiency.
【０００７】[0007]
【課題を解決するための手段】本発明の電子時計は、交
流発電手段と、該交流発電手段により充電される電源
と、該電源により駆動される時計回路とを備えた電子時
計において、前記交流発電手段と前記電源との間に直列
に、前記交流発電手段の交流出力を整流する第１の逆流
防止手段と、前記交流発電手段による発電電圧が前記電
源の耐電圧を超過しないよう前記交流発電手段を短絡制
御するスイッチング素子と、前記交流発電手段と前記ス
イッチング素子との間に直列に、前記スイッチング素子
を介して前記交流発電手段の逆流を防止する第２の逆流
防止手段と、を備えたことを特徴とする。Means for Solving the Problems] electronic time meter of the present invention, an AC power generating means, and a power supply that is charged by the AC power generating means, when the child collector that includes a clock circuit driven by the power supply < in br /> meter, in series between said power supply said AC power generating unit, the first and backflow preventing means, withstand the generated voltage of the power supply by the AC generator means for rectifying the AC output of the AC generator means A switching element for short-circuit controlling the AC power generation means so as not to exceed a voltage, and a second element for preventing a backflow of the AC power generation means via the switching element in series between the AC power generation means and the switching element. Backflow prevention means.
【０００８】[0008]
【実施例】図１は本発明の実施例を示す電子腕時計にお
ける回路ブロックである。なお図１において、図２に示
したものと同一のものは同一符号をもって示し、その説
明を省略する。FIG. 1 shows an electronic wristwatch showing an embodiment of the present invention.
It is a kick circuit block. In FIG. 1, the same components as those shown in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted.
【０００９】電池電圧検出回路９は、一定周期（例えば
１秒）で間欠駆動し、二次電池３が充電され過ぎてその
電圧が過充電防止電圧（例えば２．４Ｖ）になると、そ
の出力によりＭＯＳトランジスタ５をＯＮさせ、太陽電
池１の電気エネルギーによりＬＥＤ（発光ダイオード）
８を点燈させる。従って、ＭＯＳトランジスタ５とＬＥ
Ｄ８が太陽電池１を短絡して放電回路を形成することに
なり、太陽電池１の電位を下げて過充電を防止すること
ができる。ここで、電池電圧検出回路９が二次電池３の
電圧を測定するときには常にＭＯＳトランジスタ５をＯ
Ｎし、太陽電池１の出力の影響を無くし、正確な二次電
池３の出力電圧を測定するように構成した。The battery voltage detection circuit 9 is intermittently driven at a constant period (for example, one second). When the secondary battery 3 is overcharged and its voltage becomes an overcharge prevention voltage (for example, 2.4 V), the output thereof is used. The MOS transistor 5 is turned on, and an LED (light emitting diode) is generated by the electric energy of the solar cell 1.
Light 8 on. Therefore, MOS transistor 5 and LE
D8 short-circuits the solar cell 1 to form a discharge circuit, so that the potential of the solar cell 1 can be lowered to prevent overcharging. Here, when the battery voltage detection circuit 9 measures the voltage of the secondary battery 3, the MOS transistor 5 is always turned off.
In order to eliminate the influence of the output of the solar cell 1 and to measure the output voltage of the secondary battery 3 accurately.
【００１０】ＭＯＳトランジスタ５のゲート電圧は、図
５のタイミングチャートに示すように、１秒に１回１０
ｍｓｅｃの間Ｖｓｓ電圧となる。この１０ｍｓｅｃの間
が電池電圧の検出時間であり、この間ＭＯＳトランジス
タ５はＯＮされ、太陽電池１の発電エネルギーはＭＯＳ
トランジスタ５とＬＥＤ８を通って消費され、二次電池
３には流れないため、二次電池３の正確な出力電圧を測
定することが可能となる。 The gate voltage of the MOS transistor 5 is
As shown in the timing chart of 5, 10 times per second
The voltage is Vss for msec. During this 10msec
Is the battery voltage detection time, during which the MOS transistor
The power of the solar cell 1 is MOS
Rechargeable battery consumed through transistor 5 and LED 8
3 does not flow, so the correct output voltage of the secondary battery 3 is measured.
Can be set.
【００１１】以上のように構成された充電回路におい
て、ＬＥＤ８を図６、図７に示すよう時計の文字板１１
から見える構造にした。ここで７ａは時針、７ｂは秒
針、７ｃは分針、１０はリューズ、１１は文字板、１２
は外装ケース、１３は裏ブタ、１４は時計ムーブメント
を示す。これによりＬＥＤ８は太陽電池１に光が当って
いるときはいつも１秒周期で点滅し、充電が行なわれて
いることを示すインジゲータとなる。又、過充電電圧に
達すると太陽電池に光が当っている間は常時点燈するた
め、充電完了を示すインジケーターとなり、電子腕時計
のユーザーにとってきわめて便利な充電状況の告知装置
となっている。In the charging circuit configured as described above, the LED 8 is connected to the dial 11 of the timepiece as shown in FIGS.
The structure can be seen from. Here, 7a is an hour hand, 7b is a second hand, 7c is a minute hand, 10 is a crown, 11 is a dial, 12
Denotes an outer case, 13 denotes a rear cover, and 14 denotes a clock movement. As a result, the LED 8 blinks in a one-second cycle whenever light is applied to the solar cell 1, and becomes an indicator indicating that charging is being performed. Further, when the overcharge voltage is reached, the light is constantly lit while the solar cell is illuminated, so that it is an indicator for indicating the completion of charging, and is an extremely convenient charging status notification device for an electronic wristwatch user.
【００１２】なお本実施例においては、発電装置として
太陽電池を用いているが、発電するものであれば何でも
良く、永久磁石とコイルより成る発電機でも、外部磁界
により誘起電圧を発生させるためのコイルのみでも、ピ
エゾ効果を利用した発電機でも良い。また、電源の二次
電池としては充電可能ならば銀電池でもリチウム電池で
もＮｉ−Ｃｄ電池でもコンデンサーでも何でも良い。In this embodiment, a solar cell is used as a power generating device. However, any device may be used as long as it generates power, and a generator including a permanent magnet and a coil may be used to generate an induced voltage by an external magnetic field. A generator using only the coil or the piezo effect may be used. The secondary battery of the power supply may be a silver battery, a lithium battery, a Ni-Cd battery, or a capacitor as long as it can be charged.
【００１３】また、時計用の表示装置としては時刻のわ
かるものなら何でも良く、アナログ表示でもデジタル表
示でもかまわない。又、ＬＥＤ８をＭＯＳトランジスタ
５と直列に接続しているが、ＬＥＤ８は電流を流して発
光するものが良い。また、インジケータとして使わない
ならダイオードでも良い。 As a display device for a timepiece, a time display is used.
Anything can be used, analog display or digital display
It may be shown. LED8 is a MOS transistor
5 is connected in series, but LED 8
Light is good. Also, do not use as an indicator
If so, a diode may be used.
【００１４】[0014]
【発明の効果】以上述べたように、本発明の電子時計
は、交流発電手段と電源との間に直列に、前記交流発電
手段の交流出力を整流する第１の逆流防止手段と、前記
交流発電手段とスイッチング素子との間に直列に、前記
スイッチング素子を介して前記交流発電手段の逆流を防
止する第２の逆流防止手段とを備えたことにより、交流
発電手段からスイッチング素子を介しての交流発電手段
の逆起電力発生を防止するとともに、二次電池から交流
発電手段への逆流及び二次電池のスイッチング素子を介
しての短絡を防止し、発電ロス及び二次電池の充電ロス
を防止し、発電効率と充電効率を向上するという効果を
有する。As described above, according to the present invention, electronic time meter of the present invention, in series between an AC power generating means and power source, a first backflow prevention means for rectifying the AC output of the AC generator means, in series between the AC generator means and the switching element, by which a second backflow prevention means for preventing backflow of said AC generator hand stages through the front Symbol switching element, the switching element from the alternator means To prevent back electromotive force from being generated in the AC power generation means, prevent back flow from the secondary battery to the AC power generation means, and short-circuiting through the switching element of the secondary battery, thereby generating power loss and reducing the power consumption of the secondary battery. This has the effect of preventing charging loss and improving power generation efficiency and charging efficiency.
【図１】本実施例を示す回路ブロック図。FIG. 1 is a circuit block diagram showing a first embodiment.
【図２】従来例を示す回路ブロツク図。FIG. 2 is a circuit block diagram showing a conventional example .
【図３】二次電池の等価回路図。FIG. 3 is an equivalent circuit diagram of the secondary battery.
【図４】二次電池の充電電圧特性図。FIG. 4 is a charge voltage characteristic diagram of a secondary battery.
【図５】電池電圧検出回路図。FIG. 5 is a battery voltage detection circuit diagram.
【図６】本実施例を示す腕時計の外観図。FIG. 6 is an external view of a wristwatch showing the embodiment.
【図７】本実施例を示す腕時計の断面図。FIG. 7 is a sectional view of a wristwatch showing the embodiment.
【図８】従来例を示す回路図。FIG. 8 is a circuit diagram showing a conventional example.
【符号の説明】 １・・・太陽電池 ２・・・ダイオード ３・・・二次電池 ４・・・電池電圧検出回路 ５・・・ＭＯＳトランジスタ ６・・・時計回路 ７・・・表示装置 ８・・・ＬＥＤ（発光ダイオード） ９・・・電池電圧検出回路 １０・・リユーズ １１・・文字板 １２・・外装ケース １３・・裏ブタ １４・・時計ムーブメント[Description of Signs] 1 ... Solar cell 2 ... Diode 3 ... Secondary battery 4 ... Battery voltage detection circuit 5 ... MOS transistor 6 ... Clock circuit 7 ... Display device 8 ... LED (Light Emitting Diode) 9 ... Battery voltage detection circuit 10.Reuse 11.Character plate 12.Outer case 13.Back cover 14.Watch movement
Claims (1)
おいて、 前記交流発電手段と前記電源との間に直列に、前記交流
発電手段の交流出力を整流する第１の逆流防止手段と、 前記交流発電手段による発電電圧が前記電源の耐電圧を
超過しないよう前記交流発電手段を短絡制御するスイッ
チング素子と、 前記交流発電手段と前記スイッチング素子との間に直列
に、前記スイッチング素子を介して前記交流発電手段の
逆流を防止する第２の逆流防止手段と、 を備えたことを特徴とする電子時計。And 1. A alternator means, and a power supply that is charged by the AC power generating means, in the child during meter collector that includes a clock circuit driven by the power source, between said power supply said AC power generating unit A first backflow prevention unit that rectifies the AC output of the AC power generation unit in series; and a switching element that short-circuit-controls the AC power generation unit so that the voltage generated by the AC power generation unit does not exceed the withstand voltage of the power supply. in series between the AC generator means and said switching element, a second backflow prevention means and the child during meter collector, characterized in that it comprises a for preventing reverse flow of the AC power generator through the switching element .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8673494A JP2573909B2 (en) | 1994-04-25 | 1994-04-25 | Electronic clock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8673494A JP2573909B2 (en) | 1994-04-25 | 1994-04-25 | Electronic clock |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60076006A Division JPH0740772B2 (en) | 1985-04-10 | 1985-04-10 | Electronic wrist watch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06324166A JPH06324166A (en) | 1994-11-25 |
| JP2573909B2 true JP2573909B2 (en) | 1997-01-22 |
Family
ID=13895062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8673494A Expired - Lifetime JP2573909B2 (en) | 1994-04-25 | 1994-04-25 | Electronic clock |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2573909B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300647A (en) * | 2014-10-31 | 2015-01-21 | 广西师范学院 | Portable charger pal |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998021815A1 (en) * | 1996-11-13 | 1998-05-22 | Seiko Epson Corporation | Power supply device and portable electronic equipment |
-
1994
- 1994-04-25 JP JP8673494A patent/JP2573909B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300647A (en) * | 2014-10-31 | 2015-01-21 | 广西师范学院 | Portable charger pal |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06324166A (en) | 1994-11-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |