JP2004056908A - Device-to-be-charged and chargeable watch - Google Patents

Device-to-be-charged and chargeable watch Download PDF

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Publication number
JP2004056908A
JP2004056908A JP2002210374A JP2002210374A JP2004056908A JP 2004056908 A JP2004056908 A JP 2004056908A JP 2002210374 A JP2002210374 A JP 2002210374A JP 2002210374 A JP2002210374 A JP 2002210374A JP 2004056908 A JP2004056908 A JP 2004056908A
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Japan
Prior art keywords
charging
charged
secondary battery
full
light source
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Pending
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JP2002210374A
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Japanese (ja)
Inventor
Keiji Nakagawa
中川　啓二
Hiroyuki Sato
佐藤　弘之
Masahide Hasegawa
長谷川　昌英
Kazuhisa Toyama
遠山　和久
Toshiyuki Imai
今井　俊之
Teruhiro Ishida
石田　彰宏
Kentaro Hayashi
林　健太郎
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Ricoh Elemex Corp
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Ricoh Elemex Corp
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Priority to JP2002210374A priority Critical patent/JP2004056908A/en
Publication of JP2004056908A publication Critical patent/JP2004056908A/en
Pending legal-status Critical Current

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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Secondary Cells (AREA)
  • Tests Of Electric Status Of Batteries (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To charge a secondary battery for properly full charging, for example, in a chargeable watch. <P>SOLUTION: This device-to-be-charged, equipped with the secondary battery 33 for charging with a charger B, comprises a full-charging detection means for detecting the full charging of the secondary battery, and a microcomputer 32 of operating the current load when the full charging is detected by the full-charging detection means and controlling the charging current so as to be consumed. As the full-charging detection means, a voltage detection element 31 for detecting the voltage of the secondary battery is provided. As the current load, a display means such as a second light source 18 is provided for indicating a charged state. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
この発明は、例えば電磁誘導方式を用いて充電器で充電回路の二次電池を充電する被充電装置に関する。および、そのような被充電装置を備える充電式腕時計に関する。
【０００２】
【従来の技術】
従来、電磁誘導方式の充電式腕時計では、充電器で交流磁界を発生し、その交流磁界で充電回路の二次コイルに交流電流を生じ、その交流電流を直流電流に変換して二次電池を充電していた。そして、このような充電式腕時計では、二次電池の満充電時に充電回路を切断して二次電池の過充電を防止していた。
【０００３】
【発明が解決しようとする課題】
ところが、二次電池が満充電と判断して充電回路を切断したとき、その後二次電池内部が飽和して再度充電可能状態となり、正しく満充電とならないことがあった。
【０００４】
そこで、この発明の第１の目的は、満充電後の充電電流を有効利用しながら、二次電池を充電して正しく満充電とすることにある。
【０００５】
この発明の第２の目的は、簡単な構成で、二次電池の満充電を検出することにある。
【０００６】
この発明の第３の目的は、充電電流を用いて満充電を報知することで、満充電後の充電電流を有効利用することにある。
【０００７】
この発明の第４の目的は、上記目的を達成した被充電装置を備える充電式腕時計を得ることにある。
【０００８】
【課題を解決するための手段】
そのため、請求項１に記載の発明は、上述した第１の目的を達成すべく、充電器で充電する二次電池を備える被充電装置において、二次電池の満充電を検出する満充電検出手段と、その満充電検出手段で満充電を検出したとき電流負荷を作動して充電電流を消費するように制御するマイコンとを備える、ことを特徴とする。
【０００９】
請求項２に記載の発明は、上述した第２の目的を達成すべく、請求項１に記載の被充電装置において、満充電検出手段として、二次電池の電圧を検出する電圧検出素子を備える、ことを特徴とする。
【００１０】
請求項３に記載の発明は、上述した第３の目的を達成すべく、請求項１に記載の被充電装置において、電流負荷として、充電状態を表示する表示手段を備える、ことを特徴とする。
【００１１】
請求項４に記載の発明は、上述した第３の目的を達成すべく、請求項３に記載の被充電装置において、表示手段として、光源を備える、ことを特徴とする。
【００１２】
請求項５に記載の発明は、上述した第４の目的を達成すべく、充電式腕時計において、請求項１ないし４のいずれかに記載の被充電装置を備える、ことを特徴とする。
【００１３】
請求項６に記載の発明は、上述した第４の目的を達成すべく、充電式腕時計において、電磁誘導方式を用いて充電を行う、ことを特徴とする。
【００１４】
【発明の実施の形態】
以下、図面を参照しつつ、この発明の実施の形態につき説明する。
図１には、電磁誘導方式を用いて充電を行う充電式腕時計Ａを示す。
【００１５】
充電式腕時計Ａは、時計バンド１１を取り付けた腕時計ケース１０の外周から、頭部を突出するかたちでリュウズ１２およびスイッチ１３を設ける。また、腕時計ケース１０周囲に隠れるようにして、腕時計Ａの内部を照らす第１光源１４を３つ備える。一方、内部に文字板１５を設け、その上で時針１６および分針１７を回動自在とする。文字板１５には３つの丸孔をあけ、それらの丸孔を透して露出して、腕時計Ａの外部を照らす第２光源１８を備える。第１の光源１４および第２光源１８は、ともに、例えばＬＥＤを用いてつくる。
【００１６】
図２には、図１に示す充電式腕時計Ａを充電する充電器Ｂを示す。
充電器Ｂは、全体コの字形状をなし、充電するとき充電式腕時計Ａの腕時計ケース１０部分を載せる載置台２０を設け、また先端のコネクタ２１をＡＣ電源に電気接続するＡＣコード２２をのばす。
【００１７】
図３には、それら充電式腕時計Ａおよび充電器Ｂの電気ブロック図を示す。
充電式腕時計Ａは、ムーブメント３０に、電圧検出素子（満充電検出手段）３１、マイコン３２、二次電池３３、整流回路３４を接続し、整流回路３４に二次コイル３５を接続する。一方、充電器Ｂには、一次コイル３６に整流回路３７を接続し、整流回路３７にＡＣコード２２を接続する。
【００１８】
そして、ＡＣコード２２を介して供給されるＡＣ電流を整流回路３７で整流して一次コイル３６で交流磁界を発生する。この交流磁界により、充電式腕時計Ａの二次コイル３５に交流電流を発生し、整流回路３４で整流して直流電流として二次電池３３を充電する。
【００１９】
電圧検出素子（満充電検出手段）３１は、このとき二次電池３３の満充電を検出する。電圧検出素子３１で満充電を検出したときは、マイコン３２で制御して第２光源１８を点灯して充電電流を消費する。
【００２０】
図４には、図１の充電式腕時計に備えるスイッチ１３と第１光源１４および第２光源１８とのタイミングチャートを示す。
【００２１】
この図４から判るとおり、スイッチ１３を一度押すと、第１光源１４を点灯し、二度押すと、第１光源１４を消灯して第２光源１８を点灯する。第２光源１８の点灯中に再度スイッチ１３を押すと、第２光源１８も消灯する。第１光源１４の点灯中にスイッチ１３を押さないと、一定時間経過後、第１光源１４を消灯する。第２光源１８の点灯中にスイッチ１３を押さないと、図示するとおり一定時間Ｔ経過後、第２光源１８を消灯する。
【００２２】
また、このときマイコン３２でＯＮ／ＯＦＦタイミングを制御して第２光源１８を徐々に明るくなるように点灯するので、外部照明用の第２光源１８を使用者の目に優しく点灯することができる。
【００２３】
図５には、図１の充電式腕時計に備える電圧検出素子３１と第２光源１８とのタイミングチャートを示す。
【００２４】
この図５から判るとおり、タイミング▲１▼で電圧検出素子３１の印加電圧が上昇して一定の判定電圧以上となったときは、電圧検出素子３１はＯＮとなり、第２光源１８を細かくＯＮ／ＯＦＦして明るく点灯する。
【００２５】
充電電流と二次電池３３を消費し、タイミング▲２▼で電圧検出素子３１の印加電圧が降下して一定の判定電圧以下となったときは、電圧検出素子３１はＯＦＦとなり、第２光源１８を粗くＯＮ／ＯＦＦして暗く点灯する。
【００２６】
同様に、タイミング▲３▼で電圧検出素子３１は再びＯＮとなり、第２光源１８を再度細かくＯＮ／ＯＦＦし、タイミング▲４▼で電圧検出素子３１は再びＯＦＦとなり、第２光源１８を再度粗くＯＮ／ＯＦＦする。これにより、第２光源１８は、充電中は点滅し、充電後は明るくなったり暗くなったりしながら点灯したままとする。そして、上述したように照明用を兼ねる第２光源１８を、充電状態を表示する表示手段としても利用する。
【００２７】
【発明の効果】
以上に説明したとおり、この発明によれば、充電器で充電する二次電池を備える被充電装置において、二次電池の満充電を検出する満充電検出手段と、その満充電検出手段で満充電を検出したとき電流負荷を作動して充電電流を消費するように制御するマイコンとを備えるので、電流負荷を作動して満充電後の充電電流を有効利用するとともに過充電を防止しながら、満充電検出後も充電回路を切断することなく充電電流を流し続けるから、二次電池を充電して正しく満充電とすることができる。
【００２８】
請求項２に係る発明によれば、満充電検出手段として、二次電池の電圧を検出する電圧検出素子を備えるので、簡単な構成で、二次電池の満充電を検出することができる。
【００２９】
請求項３に係る発明によれば、電流負荷として、充電状態を表示する表示手段を備え、請求項４に係る発明によれば、表示手段として光源を備えるので、充電電流を用いて表示手段で満充電を報知するようにし、満充電後の充電電流を有効利用することができる。
【００３０】
請求項５に係る発明によれば、充電式腕時計において、請求項１ないし４のいずれかに記載の被充電装置を備え、請求項６に係る発明によれば、電磁誘導方式を用いて充電を行うので、上記効果を達成した被充電装置を備える充電式腕時計を得ることができる。
【図面の簡単な説明】
【図１】この発明の一例である、電磁誘導方式を用いて充電を行う充電式腕時計の正面図である。
【図２】図１に示す充電式腕時計を充電する充電器の斜視図である。
【図３】それら充電式腕時計および充電器の電気ブロック図である。
【図４】その充電式腕時計に備えるスイッチと第１光源および第２光源のタイミングチャートである。
【図５】その充電式腕時計に備える電圧検出素子と、表示手段である第２光源のタイミングチャートである。
【符号の説明】
Ａ　　充電式腕時計
Ｂ　　充電器
１８　　表示手段である第２光源（電流負荷）
３１　　電圧検出素子（満充電検出手段）
３２　　マイコン
３３　　二次電池[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a charged device that charges a secondary battery of a charging circuit with a charger using, for example, an electromagnetic induction method. Also, the present invention relates to a rechargeable wristwatch including such a device to be charged.
[0002]
[Prior art]
Conventionally, in a rechargeable wristwatch of the electromagnetic induction type, an AC magnetic field is generated by a charger, an AC current is generated in a secondary coil of a charging circuit by the AC magnetic field, and the AC current is converted into a DC current to convert a secondary battery. Was charging. In such a rechargeable wristwatch, when the secondary battery is fully charged, the charging circuit is cut off to prevent overcharge of the secondary battery.
[0003]
[Problems to be solved by the invention]
However, when the secondary battery is judged to be fully charged and the charging circuit is cut off, the inside of the secondary battery is then saturated and becomes rechargeable, and the battery may not be fully charged properly.
[0004]
Therefore, a first object of the present invention is to charge a secondary battery to make it fully charged while effectively utilizing the charging current after full charge.
[0005]
A second object of the present invention is to detect full charge of a secondary battery with a simple configuration.
[0006]
A third object of the present invention is to effectively use the charge current after full charge by notifying full charge using the charge current.
[0007]
A fourth object of the present invention is to provide a rechargeable wristwatch provided with a device to be charged which achieves the above object.
[0008]
[Means for Solving the Problems]
Therefore, in order to achieve the above-mentioned first object, a first aspect of the present invention provides a charged device including a secondary battery that is charged by a charger, and a full-charge detecting unit that detects a full charge of the secondary battery. And a microcomputer that controls a current load to be consumed when the full charge is detected by the full charge detection means.
[0009]
According to a second aspect of the present invention, in order to achieve the second object, the charged device according to the first aspect further includes a voltage detection element that detects a voltage of the secondary battery as a full charge detection unit. , Characterized in that.
[0010]
According to a third aspect of the present invention, in order to achieve the third object, the charged device according to the first aspect further includes a display unit for displaying a charging state as a current load. .
[0011]
According to a fourth aspect of the present invention, in order to achieve the third object, in the charged device according to the third aspect, a light source is provided as a display unit.
[0012]
According to a fifth aspect of the present invention, in order to achieve the fourth object, a rechargeable wristwatch is provided with the device to be charged according to any one of the first to fourth aspects.
[0013]
According to a sixth aspect of the present invention, in order to achieve the fourth object, the rechargeable wristwatch is charged by using an electromagnetic induction method.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a rechargeable wristwatch A that charges using an electromagnetic induction method.
[0015]
The rechargeable wristwatch A has a crown 12 and a switch 13 protruding from the outer periphery of a wristwatch case 10 to which a watch band 11 is attached. Also, three first light sources 14 that illuminate the inside of the wristwatch A are provided so as to be hidden around the wristwatch case 10. On the other hand, a dial 15 is provided inside, on which an hour hand 16 and a minute hand 17 are rotatable. The dial 15 is provided with a second light source 18 having three round holes, exposed through the round holes, and illuminating the outside of the wristwatch A. The first light source 14 and the second light source 18 are both formed using, for example, LEDs.
[0016]
FIG. 2 shows a charger B for charging the rechargeable wristwatch A shown in FIG.
The charger B has a U-shape in its entirety, has a mounting table 20 on which the watch case 10 of the rechargeable wristwatch A is to be placed when charging, and extends an AC cord 22 for electrically connecting a connector 21 at an end to an AC power supply. .
[0017]
FIG. 3 shows an electric block diagram of the rechargeable wristwatch A and the charger B.
In the rechargeable wristwatch A, a voltage detection element (full charge detection means) 31, a microcomputer 32, a secondary battery 33, and a rectifier circuit 34 are connected to a movement 30, and a secondary coil 35 is connected to the rectifier circuit 34. On the other hand, to the charger B, the rectifier circuit 37 is connected to the primary coil 36, and the AC cord 22 is connected to the rectifier circuit 37.
[0018]
Then, the AC current supplied via the AC cord 22 is rectified by the rectifier circuit 37 to generate an AC magnetic field by the primary coil 36. The alternating magnetic field generates an alternating current in the secondary coil 35 of the rechargeable wristwatch A, rectifies the rectifier circuit 34, and charges the secondary battery 33 as a direct current.
[0019]
At this time, the voltage detection element (full charge detection means) 31 detects the full charge of the secondary battery 33. When the voltage detecting element 31 detects the full charge, the microcomputer 32 controls the second light source 18 to turn on and consumes the charging current.
[0020]
FIG. 4 shows a timing chart of the switch 13, the first light source 14, and the second light source 18 provided in the rechargeable wristwatch of FIG.
[0021]
As can be seen from FIG. 4, when the switch 13 is pressed once, the first light source 14 is turned on, and when the switch 13 is pressed twice, the first light source 14 is turned off and the second light source 18 is turned on. When the switch 13 is pressed again while the second light source 18 is on, the second light source 18 is also turned off. If the switch 13 is not pressed while the first light source 14 is on, the first light source 14 is turned off after a certain period of time. If the switch 13 is not pressed while the second light source 18 is on, the second light source 18 is turned off after a certain time T has elapsed as shown in the figure.
[0022]
Also, at this time, the microcomputer 32 controls the ON / OFF timing to light the second light source 18 so as to gradually become brighter, so that the second light source 18 for external illumination can be lighted gently to the eyes of the user. .
[0023]
FIG. 5 shows a timing chart of the voltage detection element 31 and the second light source 18 provided in the rechargeable wristwatch of FIG.
[0024]
As can be seen from FIG. 5, when the applied voltage of the voltage detecting element 31 increases at timing (1) and becomes equal to or higher than a predetermined determination voltage, the voltage detecting element 31 is turned on, and the second light source 18 is finely turned on / off. Turns off and lights up brightly.
[0025]
When the charging current and the secondary battery 33 are consumed, and the applied voltage of the voltage detecting element 31 drops at a timing (2) and becomes lower than a predetermined determination voltage, the voltage detecting element 31 is turned off and the second light source 18 is turned off. Is turned on / off roughly to light up darkly.
[0026]
Similarly, at timing {circle around (3)}, the voltage detection element 31 is turned on again, and the second light source 18 is finely turned on / off again. At timing {circle around (4)}, the voltage detection element 31 is turned off again, and the second light source 18 is roughened again. Turn ON / OFF. As a result, the second light source 18 flashes during charging, and remains lit while being brightened or darkened after charging. As described above, the second light source 18 also serving as an illumination is used as a display unit for displaying the state of charge.
[0027]
【The invention's effect】
As described above, according to the present invention, in a device to be charged including a secondary battery charged by a charger, full-charge detection means for detecting full charge of the secondary battery, and full-charge detection by the full-charge detection means A microcomputer that controls the current load to consume the charging current when it is detected is provided, so the charging current after the full load is activated by operating the current load and preventing overcharging while preventing overcharging. Since the charging current continues to flow without disconnecting the charging circuit even after the detection of the charging, the secondary battery can be charged and fully charged.
[0028]
According to the second aspect of the present invention, since the voltage detection element for detecting the voltage of the secondary battery is provided as the full charge detection means, the full charge of the secondary battery can be detected with a simple configuration.
[0029]
According to the third aspect of the present invention, the current load is provided with a display means for displaying the state of charge, and according to the fourth aspect of the present invention, the display means is provided with a light source. The full charge is notified, and the charge current after the full charge can be used effectively.
[0030]
According to a fifth aspect of the invention, there is provided a rechargeable wristwatch including the device to be charged according to any one of the first to fourth aspects, and according to the sixth aspect of the invention, charging is performed using an electromagnetic induction system. As a result, a rechargeable wristwatch including the device to be charged that achieves the above effects can be obtained.
[Brief description of the drawings]
FIG. 1 is a front view of a rechargeable wristwatch that performs charging using an electromagnetic induction system, which is an example of the present invention.
FIG. 2 is a perspective view of a charger for charging the rechargeable wristwatch shown in FIG.
FIG. 3 is an electric block diagram of the rechargeable wristwatch and the charger.
FIG. 4 is a timing chart of a switch, a first light source, and a second light source provided in the rechargeable wristwatch.
FIG. 5 is a timing chart of a voltage detection element provided in the rechargeable wristwatch and a second light source as a display unit.
[Explanation of symbols]
A Rechargeable wristwatch B Charger 18 Second light source (current load) as display means
31 Voltage detection element (full charge detection means)
32 Microcomputer 33 Secondary battery

Claims (6)

充電器で充電する二次電池を備える被充電装置において、二次電池の満充電を検出する満充電検出手段と、その満充電検出手段で満充電を検出したとき電流負荷を作動して充電電流を消費するように制御するマイコンとを備えることを特徴とする、被充電装置。In a device to be charged including a secondary battery charged by a charger, a full-charge detecting means for detecting a full charge of the secondary battery, and a charging current is activated by operating a current load when the full-charge detecting means detects a full charge. And a microcomputer that controls the device to consume power. 前記満充電検出手段として、前記二次電池の電圧を検出する電圧検出素子を備えることを特徴とする、請求項１に記載の被充電装置。2. The charged device according to claim 1, further comprising a voltage detection element that detects a voltage of the secondary battery as the full charge detection unit. 3. 前記電流負荷として、充電状態を表示する表示手段を備えることを特徴とする、請求項１に記載の被充電装置。The charged device according to claim 1, further comprising a display unit that displays a state of charge as the current load. 前記表示手段として、光源を備えることを特徴とする、請求項３に記載の被充電装置。The charged device according to claim 3, wherein a light source is provided as the display unit. 請求項１ないし４のいずれかに記載の被充電装置を備えることを特徴とする、充電式腕時計。A rechargeable wristwatch comprising the device to be charged according to any one of claims 1 to 4. 電磁誘導方式を用いて充電を行うことを特徴とする、請求項５に記載の充電式腕時計。The rechargeable wristwatch according to claim 5, wherein charging is performed using an electromagnetic induction method.
JP2002210374A 2002-07-19 2002-07-19 Device-to-be-charged and chargeable watch Pending JP2004056908A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104505551A (en) * 2014-12-15 2015-04-08 广东欧珀移动通信有限公司 Charging method and charging circuit of wearable device
WO2016173417A1 (en) * 2015-04-30 2016-11-03 成都迈奥信息技术有限公司 Multifunctional smart watch charging base
WO2016173418A1 (en) * 2015-04-30 2016-11-03 成都迈奥信息技术有限公司 Integrated smart watch charging base with inclined charging plane

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104505551A (en) * 2014-12-15 2015-04-08 广东欧珀移动通信有限公司 Charging method and charging circuit of wearable device
WO2016173417A1 (en) * 2015-04-30 2016-11-03 成都迈奥信息技术有限公司 Multifunctional smart watch charging base
WO2016173418A1 (en) * 2015-04-30 2016-11-03 成都迈奥信息技术有限公司 Integrated smart watch charging base with inclined charging plane

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