JPH10283870A - Key input apparatus - Google Patents
Key input apparatusInfo
- Publication number
- JPH10283870A JPH10283870A JP9105282A JP10528297A JPH10283870A JP H10283870 A JPH10283870 A JP H10283870A JP 9105282 A JP9105282 A JP 9105282A JP 10528297 A JP10528297 A JP 10528297A JP H10283870 A JPH10283870 A JP H10283870A
- Authority
- JP
- Japan
- Prior art keywords
- key
- pushing
- generating element
- power generating
- charging means
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2239/00—Miscellaneous
- H01H2239/076—Key stroke generating power
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、例えばキーが押
下されることにより当該キーに対応した文字や制御文字
のコードを発生し、コンピュータへの入力、通信回線へ
の入力、プリンタへの印字指示等を行なうキーボードの
ようなキー入力装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, when a key is depressed, a code of a character or a control character corresponding to the key is generated, input to a computer, input to a communication line, and print instruction to a printer. And the like.
【０００２】[0002]
【従来の技術】上述のキー入力装置（キーボード装置）
は卓上用パーソナルコンピュータ、携帯用パーソナルコ
ンピュータやワードプロセッサその他の機器に接続され
文字コードまたは制御文字コードの入力操作に用いられ
る一方、機器のコンピュータ本体側は入力コードに対応
して作動する。ここで、常時電源に接続して使用される
卓上用機器については特に問題はないが、ノートパソコ
ンのような携帯用機器は充電池（２次電池）の電力によ
って駆動されるため、使用頻度等に対応して充電池の電
力消費が大となり、携帯用機器の使用時間が制限される
問題点があった。2. Description of the Related Art The above-mentioned key input device (keyboard device)
Is connected to a desktop personal computer, a portable personal computer, a word processor, and other devices and used for input operation of a character code or a control character code, while the computer main body of the device operates according to the input code. Here, there is no particular problem with the desktop equipment that is always connected to a power supply, but portable equipment such as a notebook computer is driven by the power of a rechargeable battery (secondary battery). Accordingly, there is a problem that the power consumption of the rechargeable battery is increased and the use time of the portable device is limited.
【０００３】[0003]
【発明が解決しようとする課題】この発明の請求項１記
載の発明は、キー操作時（押下時）に圧電変換手段を押
圧する押圧部を設けて、圧電変換された起電力を充電手
段（充電池）や駆動手段（ハードディスク、ディスプレ
イ、ＣＰＵなど）に供給することで、人手によるキー操
作力を有効利用しつつ、充電手段の電力消費を低減せし
めて、充電手段の長寿命化を図ることができるキー入力
装置の提供を目的とする。According to the first aspect of the present invention, there is provided a pressing portion for pressing the piezoelectric conversion means when a key is operated (pressed), and the piezoelectrically converted electromotive force is charged by the charging means ( By supplying power to rechargeable batteries) and driving means (hard disk, display, CPU, etc.), the power consumption of the charging means is reduced and the life of the charging means is prolonged, while effectively utilizing the manual key operation force. It is an object of the present invention to provide a key input device capable of performing key operations.
【０００４】この発明の請求項２記載の発明は、上記請
求項１記載の発明の目的と併せて、上述の押圧部をキー
トップに連動する可動部に設けることで、キーの操作時
（押下時）にこの押圧部で確実に圧電変換手段を押圧し
て、圧電変換された起電力を得ることができるキー入力
装置の提供を目的とする。According to a second aspect of the present invention, in addition to the object of the first aspect, by providing the above-described pressing portion on a movable portion that is linked to the keytop, the key portion can be operated (pressed). It is another object of the present invention to provide a key input device capable of reliably pressing the piezoelectric conversion means with the pressing portion and obtaining a piezoelectrically converted electromotive force.
【０００５】この発明の請求項３記載の発明は、上記請
求項１または２記載の発明の目的と併せて、圧電変換さ
れた起電力を携帯用器の充電池に供給することで、卓上
用のものと比較して充電池の電力消費が著しい携帯用機
器の充電池消費の低減を図り、使用時間の長期化を可能
とすることができるキー入力装置の提供を目的とする。According to a third aspect of the present invention, in addition to the object of the first or second aspect of the present invention, a piezoelectrically-converted electromotive force is supplied to a rechargeable battery of a portable device, so that it can be used for a desktop. It is an object of the present invention to provide a key input device capable of reducing the rechargeable battery consumption of a portable device in which the power consumption of the rechargeable battery is remarkable as compared with that of the portable device and prolonging the use time.
【０００６】[0006]
【課題を解決するための手段】この発明の請求項１記載
の発明は、キーを備えたキー入力装置であって、上記キ
ーの操作時に圧電変換手段を押圧する押圧部が設けら
れ、圧電変換された起電力を充電手段または駆動手段に
供給するキー入力装置であることを特徴とする。According to a first aspect of the present invention, there is provided a key input device provided with a key, wherein a pressing portion for pressing the piezoelectric conversion means when operating the key is provided, The key input device supplies the generated electromotive force to the charging means or the driving means.
【０００７】この発明の請求項２記載の発明は、上記請
求項１記載の発明の構成と併せて、上記押圧部はキート
ップに連動する可動部に設けられたキー入力装置である
ことを特徴とする。According to a second aspect of the present invention, in addition to the configuration of the first aspect of the present invention, the pressing portion is a key input device provided on a movable portion linked to a keytop. And
【０００８】この発明の請求項３記載の発明は、上記請
求項１または２記載の発明の目的と併せて、圧電変換さ
れた起電力を携帯用機器の充電池に供給するキー入力装
置であることを特徴とする。According to a third aspect of the present invention, in addition to the object of the first or second aspect of the present invention, there is provided a key input device for supplying a piezoelectrically converted electromotive force to a rechargeable battery of a portable device. It is characterized by the following.
【０００９】[0009]
【発明の作用及び効果】この発明の請求項１記載の発明
によれば、キーの操作時に上述の押圧部にて圧電変換手
段が押圧され、この圧電変換手段は圧力を起電力に変換
して充電手段または駆動手段に供給する。このように入
力操作時に必然的に発生する人手によるキー操作力を有
効利用しつつ、充電手段の電力消費を低減せしめて、充
電手段の長寿命化を図ることができる効果がある。According to the first aspect of the present invention, when the key is operated, the piezoelectric conversion means is pressed by the above-mentioned pressing portion, and the piezoelectric conversion means converts the pressure into an electromotive force. Supply to charging means or driving means. As described above, there is an effect that the power consumption of the charging unit can be reduced and the life of the charging unit can be prolonged while effectively utilizing the manual key operation force that is inevitably generated during the input operation.
【００１０】この発明の請求項２記載の発明によれば、
上記請求項１記載の発明の効果と併せて、上述の押圧部
をキートップに連動する可動部に設けたので、キーの操
作時にキートップと連動して下動する押圧部により確実
に圧電変換手段を押圧して、圧電変換された起電力を良
好に得ることができる効果がある。According to the second aspect of the present invention,
In addition to the effect of the first aspect of the present invention, since the above-described pressing portion is provided on the movable portion that is interlocked with the key top, the pressing portion that moves down with the key top when operating the key ensures that the piezoelectric conversion is performed. By pressing the means, there is an effect that a piezoelectrically converted electromotive force can be favorably obtained.
【００１１】この発明の請求項３記載の発明によれば、
上記請求項１または２記載の発明の効果と併せて、圧電
変換された起電力を携帯用機器（ノートパソコンなど）
の充電池に供給するので、卓上用のものと比較して充電
池の電力消費が著しい携帯用機器の充電消費の低減を図
り、その使用時間の長期化を可能とすることができる効
果がある。According to the third aspect of the present invention,
In addition to the effects of the first or second aspect of the present invention, the piezoelectrically converted electromotive force is used for portable equipment (such as a notebook computer).
Since the battery is supplied to the rechargeable battery, the power consumption of the rechargeable battery is remarkably lower than that of the desktop device, thereby reducing the charge consumption of the portable device, and has an effect that the use time can be extended. .
【００１２】[0012]
【実施例】この発明の一実施例を以下図面に基づいて詳
述する。図面はキー入力装置（キーボード装置）を示
し、図１において、プリント基板１とマウスパネル２と
の間には複数のキー３（但し図面では図示の便宜上、１
つのみを示す）を取付けてキーボード４が構成されてい
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. The drawing shows a key input device (keyboard device). In FIG. 1, a plurality of keys 3 (for convenience of illustration, one key is provided between a printed circuit board 1 and a mouse panel 2).
Of the keyboard 4 is shown.
【００１３】上述のプリント基板１はキー３に対応して
固定電極５，６を有する一方、キー３は電気絶縁部材か
らなるケース７と、ケース７内に上下可能に配設された
操作軸８と、化粧パネル９の上部において上述の操作軸
８の上端部に一体的に嵌着された合成樹脂製のキートッ
プ１０と、このキートップ１０とケース７との間に張架
されたリターンスプリング１１と、キートップ１０押下
操作時にスプリング１２（キー荷重の均一化を図るスプ
リング）を介して可動（下動）する支持枠１３およびス
イッチ部１４とを備え、このスイッチ部１４の下面には
下動電極１５が設けられている。The above-mentioned printed circuit board 1 has fixed electrodes 5 and 6 corresponding to the keys 3, while the keys 3 are composed of a case 7 made of an electrically insulating member and an operation shaft 8 arranged vertically in the case 7. A key top 10 made of synthetic resin integrally fitted to an upper end of the operation shaft 8 above the decorative panel 9, and a return spring stretched between the key top 10 and the case 7. 11, a support frame 13 and a switch unit 14 that are movable (downwardly moved) via a spring 12 (a spring for equalizing the key load) when the key top 10 is pressed down. A moving electrode 15 is provided.
【００１４】上述の各要素１〜３、５〜１５からなるキ
ーボード４の下部、詳しくはプリント基板１の下部に圧
電変換手段としてのセラミック発電素子１６を該プリン
ト基板１と平行に配置している。しかも上述のプリント
基板１には開口１７を設ける一方、支持枠１３に一体的
に形成した押圧突起１８を開口１７内において上述のセ
ラミック発電素子１６と対向させている。A ceramic power generating element 16 as a piezoelectric conversion means is arranged in parallel with the printed board 1 below the keyboard 4 composed of the above-described elements 1 to 3 and 5 to 15, specifically, below the printed board 1. . In addition, the printed board 1 is provided with the opening 17, and the pressing projection 18 formed integrally with the support frame 13 is opposed to the ceramic power generating element 16 in the opening 17.
【００１５】上述のセラミック発電素子１６としては例
えばＰｂ（Ｔｉ−Ｚｒ）Ｏ3 セラミック（チタン酸ジル
コン酸鉛セラミックのことで、一般にＰＺＴと略称され
る）の固溶体のを主成分とするものを用いる。このセラ
ミック発電端子１６にキー操作手動入力時に押圧突起１
８から押圧力を加えると、縦効果（longitudinal effec
t ）により、次に［数１］で示す出力電圧Ｖ（起電力）
を得ることができる。As the above-mentioned ceramic power generation element 16, for example, a Pb (Ti-Zr) O 3 ceramic (lead zirconate titanate ceramic, which is generally abbreviated as PZT) as a main component is used. . When the key operation is manually input to the ceramic power generation terminal 16, the pressing protrusion 1
When pressing force is applied from 8, the longitudinal effect (longitudinal effec
t), the output voltage V (electromotive force) shown in [Equation 1]
Can be obtained.
【００１６】[0016]
【数１】 (Equation 1)
【００１７】これは、強誘電体の結晶に圧力（応力）を
加えると電気分極あるいは電位勾配（電場）が生ずる圧
電性を用いたピエゾ効果（piezoelectric effect) によ
るものである。This is due to a piezoelectric effect using piezoelectricity, in which when a pressure (stress) is applied to a ferroelectric crystal, an electric polarization or a potential gradient (electric field) occurs.
【００１８】上述のセラミック発電素子１６の上下両面
には必要に応じて電極１９，２０を介してライン（通電
体）２１，２２を接続し、これらライン２１，２２をダ
イオード２７，２８を図示の如く介して充電地２３の正
極に接続すると共に、ノートパソコンなどの携帯用機器
の充電池２３と駆動装置２４（ハードディスク、ディス
プレイ、ＣＰＵなど）とを結ぶライン（通電体）２５，
２６に対して充電地２３を電気接続して、圧電変換され
た起電力を充電池２３（または駆動装置２４）に供給す
べく構成している。Lines (current conductors) 21 and 22 are connected to the upper and lower surfaces of the above-mentioned ceramic power generating element 16 via electrodes 19 and 20 as necessary, and these lines 21 and 22 are connected to diodes 27 and 28, respectively. And a line (electrical conductor) 25 connecting a rechargeable battery 23 of a portable device such as a notebook personal computer and a driving device 24 (hard disk, display, CPU, etc.)
The charging ground 23 is electrically connected to the charging battery 26 to supply the piezoelectrically converted electromotive force to the rechargeable battery 23 (or the driving device 24).
【００１９】なお、上述の［数１］で示したように出力
電圧Ｖはセラミック発電素子１６の面積Ｓに反比例する
ので、セラミック発電素子１６は押圧突起１８と対向す
る部位にのみ各キー３に対応させて複数設け、これらの
素子１６をライン２１，２２間に並列接続してもよく、
出力電圧Ｖは素子１６の肉厚（幅）に正比例するので、
この幅を予め設定することで、適切な電圧値を得るよう
に構成することが望まれる。Since the output voltage V is inversely proportional to the area S of the ceramic power generating element 16 as shown in the above [Equation 1], the ceramic power generating element 16 is applied to each key 3 only at a portion opposed to the pressing projection 18. A plurality of such elements 16 may be connected in parallel between the lines 21 and 22,
Since the output voltage V is directly proportional to the thickness (width) of the element 16,
It is desired that the width is set in advance so that an appropriate voltage value is obtained.
【００２０】このように構成したキー入力装置は、キー
３を用いて文字コードや制御文字コードを入力する時、
そのキートップ１０を指先で押圧（押下）すると、操作
軸８およびスプリング１２を介して押圧突起１８が下動
するので、この押圧突起１８により上述のセラミック発
電素子１６が加圧され、ピエゾ効果により該セラミック
発電素子１６に発生した起電力は充電池２３、駆動装置
２４に供給され、起電力を充電池２３に充電する。The key input device configured as described above, when inputting a character code or a control character code using the key 3,
When the key top 10 is pressed (pressed) with a fingertip, the pressing projection 18 moves downward via the operating shaft 8 and the spring 12, so that the above-mentioned ceramic power generating element 16 is pressed by the pressing projection 18, and the piezo effect is applied. The electromotive force generated in the ceramic power generation element 16 is supplied to the rechargeable battery 23 and the driving device 24, and charges the rechargeable battery 23 with the electromotive force.
【００２１】このように、キー３の操作時に上述の押圧
部（押圧突起１８参照）にて圧電変換手段（セラミック
発電素子１６参照）が押圧され、この圧電変換手段（セ
ラミック発電素子１６参照）は圧力を起電力に変換して
充電手段（充電池２３参照）または駆動手段（ハードデ
ィスク、ディスプレイ、ＣＰＵなどの駆動装置２４参
照）に供給する。このように入力操作時に必然的に発生
する人手によるキー操作力を有効利用しつつ、充電手段
（充電池２３参照）の電力消費を低減せしめて、充電手
段の長寿命化を図ることができる効果がある。As described above, when the key 3 is operated, the piezoelectric converting means (see the ceramic power generating element 16) is pressed by the above-mentioned pressing portion (see the pressing protrusion 18), and the piezoelectric converting means (see the ceramic power generating element 16) is pressed. The pressure is converted into an electromotive force and supplied to a charging unit (see the rechargeable battery 23) or a driving unit (see the driving device 24 such as a hard disk, a display, and a CPU). As described above, the power consumption of the charging means (see the rechargeable battery 23) is reduced while effectively utilizing the manual key operation force inevitably generated at the time of the input operation, and the service life of the charging means can be extended. There is.
【００２２】また、上述の押圧部（押圧突起１８参照）
をキートップ１０に連動する可動部（操作軸８、支持枠
１３、スイッチ部１４を意味するが、この実施例では支
持枠１３に設定）に設けたので、キー３の操作時にキー
トップ１０と連動して下動する押圧部（押圧突起１８参
照）により確実に圧電変換手段（セラミック発電素子１
６参照）を押圧して、圧電変換された起電力を良好に得
ることができる効果がある。Further, the above-mentioned pressing portion (see pressing protrusion 18)
Is provided on a movable unit (meaning the operation shaft 8, the support frame 13, and the switch unit 14, but is set on the support frame 13 in this embodiment) interlocked with the key top 10, so that when the key 3 is operated, The pressing portion (see the pressing protrusion 18) which moves downward in conjunction with the piezoelectric converting means (ceramic power generating element 1)
6) to obtain a piezoelectrically converted electromotive force.
【００２３】さらに、圧電変換された起電力を携帯用機
器（ノートパソコンなど）の充電池２３に供給するの
で、卓上用のものと比較して充電池２３の電力消費が著
しい携帯用機器の充電消費の低減を図り、その使用時間
の長期化を可能とすることができる効果がある。Furthermore, since the piezoelectrically converted electromotive force is supplied to the rechargeable battery 23 of a portable device (notebook personal computer or the like), the power consumption of the rechargeable battery 23 is remarkably higher than that of the desktop device. This has the effect of reducing consumption and prolonging the use time.
【００２４】この発明の構成と、上述の実施例との対応
において、この発明の圧電変換手段は、実施例のセラミ
ック発電素子１６に対応し、以下同様に、押圧部は、押
圧突起１８に対応し、充電手段は、充電池（２次電池）
２３に対応し、駆動手段は、駆動装置（具体的にはハー
ドディスク、ディスプレイ、ＣＰＵなど）２４に対応
し、可動部は、操作軸８、支持枠１３、スイッチ部１４
のうちの少なくとも何れか１つに対応するも、この発明
は、上述の実施例の構成のみに限定されるものではな
い。In correspondence between the configuration of the present invention and the above-described embodiment, the piezoelectric conversion means of the present invention corresponds to the ceramic power generating element 16 of the embodiment, and similarly, the pressing portion corresponds to the pressing projection 18. The charging means is a rechargeable battery (secondary battery)
23, the drive means corresponds to a drive device (specifically, a hard disk, a display, a CPU, etc.) 24, and the movable part includes the operation shaft 8, the support frame 13, the switch part 14,
However, the present invention is not limited to only the configuration of the above-described embodiment.
【００２５】例えば、圧電変換手段は上述のＰＺＴセラ
ミックの固溶体を主成分とするセラミック発電阻止１６
に代えて、水晶、電気石、ロッシェル塩、ＫＤＰ（ＫＨ
2 ＰＯ4 ：リン酸カリ）、ＡＤＰ（ＮＨ4 Ｈ2 ＰＯ4 ：
リン酸アンモニウム）、チタン酸バリウム等の他の圧電
効果を生ずる結晶であってもよい。For example, the piezoelectric conversion means is a ceramic power generation block 16 mainly composed of the above-mentioned solid solution of PZT ceramic.
Instead of quartz, tourmaline, Rochelle salt, KDP (KH
2 PO 4 : potassium phosphate), ADP (NH 4 H 2 PO 4 :
Crystals that produce other piezoelectric effects such as ammonium phosphate) and barium titanate may be used.
【００２６】また本発明は、キーボードを備えたパーソ
ナルコンピュータ、ホストコンピュータ、ワードプロセ
ッサその他の各種機器に適用することができる他、テン
キーを備えた充電池駆動タイプの電子卓上計算機（いわ
ゆる電卓）にも適用することができる。さらに図１のス
プリング１２のバネ力を予め任意に設定することで、出
力電圧Ｖを調整することも可能となる。The present invention can be applied to a personal computer, a host computer, a word processor and other various devices equipped with a keyboard, and also applied to a rechargeable battery-driven electronic desk calculator (so-called calculator) having a numeric keypad. can do. Further, the output voltage V can be adjusted by arbitrarily setting the spring force of the spring 12 in FIG. 1 in advance.
【図１】 本発明のキー入力装置を示す系統図。FIG. 1 is a system diagram showing a key input device of the present invention.
３…キー １０…キートップ １３…支持枠（可動部） １６…セラミック発電素子 １８…押圧突起 ２３…充電池 ２４…駆動装置 DESCRIPTION OF SYMBOLS 3 ... Key 10 ... Key top 13 ... Support frame (movable part) 16 ... Ceramic power generation element 18 ... Pressing protrusion 23 ... Rechargeable battery 24 ... Drive device
Claims (3)
キーの操作時に圧電変換手段を押圧する押圧部が設けら
れ、圧電変換された起電力を充電手段または駆動手段に
供給するキー入力装置。1. A key input device provided with a key, comprising: a pressing portion for pressing a piezoelectric conversion means when operating the key; and a key input for supplying a piezoelectrically converted electromotive force to a charging means or a driving means. apparatus.
に設けられた請求項１記載のキー入力装置。2. The key input device according to claim 1, wherein said pressing portion is provided on a movable portion linked to a key top.
池に供給する請求項１または２記載のキー入力装置。3. The key input device according to claim 1, wherein the electromotive force subjected to the piezoelectric conversion is supplied to a rechargeable battery of a portable device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9105282A JPH10283870A (en) | 1997-04-07 | 1997-04-07 | Key input apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9105282A JPH10283870A (en) | 1997-04-07 | 1997-04-07 | Key input apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10283870A true JPH10283870A (en) | 1998-10-23 |
Family
ID=14403328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9105282A Pending JPH10283870A (en) | 1997-04-07 | 1997-04-07 | Key input apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10283870A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020057683A (en) * | 2001-01-03 | 2002-07-12 | 신희삼 | The keyboard having power generating device |
| WO2004044997A1 (en) * | 2002-11-05 | 2004-05-27 | Infinite Power Solutions, Inc. | Method and apparatus for an incidental use piezoelectric energy source with thin-film battery |
| US7102271B2 (en) | 2004-01-14 | 2006-09-05 | Infinite Power Solutions, Inc. | Method and apparatus for a high output sensor system |
| US7183693B2 (en) | 2003-04-22 | 2007-02-27 | Infinite Power Solutions, Inc. | Method and apparatus for an ambient energy battery recharge system |
| JP2012010592A (en) * | 2010-04-28 | 2012-01-12 | Daihatsu Motor Co Ltd | Power generation system |
-
1997
- 1997-04-07 JP JP9105282A patent/JPH10283870A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020057683A (en) * | 2001-01-03 | 2002-07-12 | 신희삼 | The keyboard having power generating device |
| WO2004044997A1 (en) * | 2002-11-05 | 2004-05-27 | Infinite Power Solutions, Inc. | Method and apparatus for an incidental use piezoelectric energy source with thin-film battery |
| US7183693B2 (en) | 2003-04-22 | 2007-02-27 | Infinite Power Solutions, Inc. | Method and apparatus for an ambient energy battery recharge system |
| US7102271B2 (en) | 2004-01-14 | 2006-09-05 | Infinite Power Solutions, Inc. | Method and apparatus for a high output sensor system |
| US7274130B2 (en) | 2004-01-14 | 2007-09-25 | Infinite Power Solutions, Inc. | Method and apparatus for a high output sensor system |
| JP2012010592A (en) * | 2010-04-28 | 2012-01-12 | Daihatsu Motor Co Ltd | Power generation system |
| US9190597B2 (en) | 2010-04-28 | 2015-11-17 | Daihatsu Motor Co., Ltd. | Power-generating system |
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