JP2007143353A - Power generation system and electronic device applying the same - Google Patents

Power generation system and electronic device applying the same Download PDF

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JP2007143353A
JP2007143353A JP2005336546A JP2005336546A JP2007143353A JP 2007143353 A JP2007143353 A JP 2007143353A JP 2005336546 A JP2005336546 A JP 2005336546A JP 2005336546 A JP2005336546 A JP 2005336546A JP 2007143353 A JP2007143353 A JP 2007143353A
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power generation
unit
generation system
mechanical resonance
weight
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Yusuke Adachi
祐介 足立
Hiroshi Fukushima
寛 福島
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a small power generation system capable of generating electric power efficiently even with comparatively low frequency such as vibrations by human power. <P>SOLUTION: The power generation system is constituted with a power generator having piezoelectric elements, and a mechanical resonance portion to generate electric power continuously by this mechanical resonance portion. Consequently, a resonance frequency of the mechanical resonance portion can easily be set. Therefore, the small power generation system can be provided that is capable of generating electric power efficiently even with comparatively low frequency such as vibration by human power. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は発電システム並びにこれを応用した電子機器に関するものである。   The present invention relates to a power generation system and an electronic apparatus to which the power generation system is applied.

圧電素子を用いて発電する発電システムは構成が簡単なこと、信頼性が比較的高いことなどの理由により、従来多くの方法が提案されている。   Many methods have been proposed in the past for reasons such as a simple configuration of power generation systems that generate power using piezoelectric elements and relatively high reliability.

本発明に関する先行技術文献としては、例えば特許文献１をあげることができる。
特開平７−４９３８８号公報 For example, Patent Document 1 can be cited as a prior art document relating to the present invention.
JP 7-49388 A

上記特許文献１に記載された発電機は容易で安価な携帯機器用の発電機を実現することができるが、このような発電機に対して人力で加速度運動を起こさせ、発電を行おうとした場合、人力による加振の周波数は１００Ｈｚ以下と低いため、この周波数で共振する機械共振部は非常に大きなものとなり、発電機の大型化は避けることができないため携帯機器等に使用しにくいという課題を有していた。   The generator described in Patent Document 1 can realize an easy and inexpensive generator for a portable device, but it is intended to generate power by causing an acceleration motion to such a generator by human power. In this case, since the frequency of vibration by human power is as low as 100 Hz or less, the mechanical resonance part that resonates at this frequency becomes very large, and the enlargement of the generator cannot be avoided, so that it is difficult to use it for portable devices etc. Had.

即ち、機械共振周波数をｆ、バネ定数をｋ、重りの質量をｍ、重りによる静止時のバネのたわみをｘ、重力加速度をｇとしたときに、機械共振周波数ｆは   That is, when the mechanical resonance frequency is f, the spring constant is k, the mass of the weight is m, the spring deflection due to the weight is x, and the gravitational acceleration is g, the mechanical resonance frequency f is

Figure 2007143353
Figure 2007143353

で表わされ、かつ
ｋｘ＝ｍｇであるため
重りによる静止時のバネのたわみは、ｘ＝ｇ／（２πｆ）2
となる。 And kx = mg, the deflection of the spring at rest due to the weight is x = g / (2πf) 2
It becomes.

従って、３Ｈｚの機械共振を作成するのには、約２８ｍｍ、１０Ｈｚの機械共振を作成するためには約２５ｍｍ板バネを撓ます必要がある。板バネに直接圧電素子を貼り付けた上記特許文献１の構成では、圧電素子の表面の歪みが破壊限界を超えないようにするためには、板バネ部を非常に長くする必要があり、発電システム自身が大きくなってしまうという課題を有していた。   Therefore, in order to create a mechanical resonance of 3 Hz, it is necessary to deflect a leaf spring of about 25 mm in order to create a mechanical resonance of about 28 mm and 10 Hz. In the configuration of Patent Document 1 in which the piezoelectric element is directly attached to the leaf spring, the leaf spring portion needs to be very long in order to prevent the distortion of the surface of the piezoelectric element from exceeding the fracture limit. The system itself had the problem of becoming large.

従って本発明は、人力による加振などの比較的低い周波数であっても大型化することなく、携帯機器などに最適な発電システムを提供することを目的とする。   Accordingly, an object of the present invention is to provide an optimal power generation system for portable devices and the like without increasing the size even at a relatively low frequency such as vibration by human power.

この目的を達成するために本発明の発電システムは、圧電素子を有する発電部と、機械共振部と、を少なくとも有し、この機械共振部により持続して発電を行う発電システムであり、機械共振部の共振周波数を容易に設定することができるため、人力による加振のような比較的低い周波数であっても効率的に発電することが可能であるとともに小型化の発電システムを提供することができる。   In order to achieve this object, a power generation system of the present invention is a power generation system that has at least a power generation unit having a piezoelectric element and a mechanical resonance unit, and generates power continuously by the mechanical resonance unit. It is possible to easily set the resonance frequency of the part, and it is possible to efficiently generate power even at a relatively low frequency such as vibration by human power, and to provide a downsized power generation system it can.

本発明の発電システムによると、機械共振により持続して発電を行うシステムとしたため、人力による加振などのような比較的低い周波数であっても効率的に発電することが可能であるとともに小型化の発電システムを提供することができるという効果を有する。   According to the power generation system of the present invention, since it is a system that continuously generates power by mechanical resonance, it is possible to generate power efficiently even at a relatively low frequency such as vibration by human power and downsizing. The power generation system can be provided.

（実施の形態１）
以下、実施の形態１について、図１を用いて説明する。 (Embodiment 1)
Hereinafter, the first embodiment will be described with reference to FIG.

図１は本実施の形態にかかる発電システムの一例を示す断面図であり、圧電素子からなる発電部１１と重り１２との間に位置し、発電部１１と重り１２と結合されている、繰り返し伸縮する部材であるコイルバネ１３とを有する。   FIG. 1 is a cross-sectional view showing an example of a power generation system according to the present embodiment, which is located between a power generation unit 11 made of a piezoelectric element and a weight 12 and is connected to the power generation unit 11 and the weight 12 repeatedly. And a coil spring 13 which is a member that expands and contracts.

図１において機械共振部は重り１２とコイルバネ１３により構成されている。１５は上記の発電部１１と、重り１２とコイルバネ１３よりなる機械共振部１４を保持する箱状の筐体である。   In FIG. 1, the mechanical resonance portion is composed of a weight 12 and a coil spring 13. Reference numeral 15 denotes a box-shaped housing that holds the power generation unit 11 and the mechanical resonance unit 14 including the weight 12 and the coil spring 13.

１６は発電部１１で発電された電気を出力するためのリード線などにより構成される端子であり、筐体１５の外部に設けられたＬＥＤなどの発光素子１７に接続されている。   Reference numeral 16 denotes a terminal constituted by a lead wire or the like for outputting electricity generated by the power generation unit 11, and is connected to a light emitting element 17 such as an LED provided outside the housing 15.

発電部１１は、金属板１８の片面に圧電体１９が貼り付けられた構成で、金属板１８の反対側は機械共振部１４に接続されている。圧電体１９は、表裏に電極が形成してあり厚み方向に分極してある。発電部１１が撓むことにより、金属板に貼り付けられた圧電体１９は、面内の伸びまたは圧縮の応力がかかり、圧電効果により発電し、リード線などにより接続された発光素子を点灯させる。   The power generation unit 11 has a configuration in which a piezoelectric body 19 is attached to one side of a metal plate 18, and the opposite side of the metal plate 18 is connected to the mechanical resonance unit 14. The piezoelectric body 19 has electrodes formed on both sides and is polarized in the thickness direction. When the power generation unit 11 is bent, the piezoelectric body 19 attached to the metal plate is subjected to in-plane elongation or compression stress, generates power by the piezoelectric effect, and turns on the light emitting elements connected by lead wires or the like. .

ここで、上記図１に示した筐体に、人力により振動又は衝撃を加えることにより機械共振部の重りが繰り返し振動し、持続的に発電部１１を撓ますことで持続的な発電を実現することができる。人力での加振によって機械共振部１４を効果的に共振させるためには、人力による加振の周波数と機械共振部１４の共振周波数を出来るだけ近づける必要がある。そのために、機械共振部１４の共振周波数は、１００Ｈｚ以下、１Ｈｚ以上、望ましくは３０Ｈｚ以下、３Ｈｚ以上にする必要があり、この条件を満たすようにコイルバネ１３のバネ定数と、重り１２の重さが設定される。   Here, by applying vibration or impact to the housing shown in FIG. 1 manually, the weight of the mechanical resonance unit repeatedly vibrates, and the power generation unit 11 is continuously bent to realize continuous power generation. be able to. In order to effectively resonate the mechanical resonance unit 14 by vibration with human power, it is necessary to make the frequency of vibration by human power and the resonance frequency of the mechanical resonance unit 14 as close as possible. Therefore, the resonance frequency of the mechanical resonance unit 14 must be 100 Hz or less, 1 Hz or more, desirably 30 Hz or less, and 3 Hz or more. The spring constant of the coil spring 13 and the weight of the weight 12 are set so as to satisfy this condition. Is set.

また、重り１２の重さは、発電システム全体の重さより十分軽くなるように設定されており、発電システムの加振を停止しても、機械共振部のみの振動が持続するようにしている。重り１２の重さが重過ぎると発電システムの加振を停止した後、発電システム自体が振動してしまい効率的な発電が出来ない。そのため、重り１２の重さは、発電システム全体の１／２以下が好ましく、さらに１／５以下とすることが好ましい。そのため、発電システムに、機械共振部以外に発電システムの重量調整用のウエイト２７を設けてもよい。ウエイト２７は重りに対して対称に複数個配置しても良い。ただし、人力で加振するので発電システム全体の重さは、３ｋｇ以下、望ましくは３００ｇ以下にするのが好ましい。   Further, the weight 12 is set to be sufficiently lighter than the entire power generation system, so that the vibration of only the mechanical resonance portion is sustained even when the vibration of the power generation system is stopped. If the weight 12 is too heavy, the power generation system itself vibrates after the vibration of the power generation system is stopped, and efficient power generation cannot be performed. Therefore, the weight of the weight 12 is preferably 1/2 or less of the entire power generation system, and more preferably 1/5 or less. Therefore, a weight 27 for adjusting the weight of the power generation system may be provided in the power generation system in addition to the mechanical resonance unit. A plurality of weights 27 may be arranged symmetrically with respect to the weight. However, since the vibration is generated by human power, the weight of the entire power generation system is preferably 3 kg or less, preferably 300 g or less.

重りの材質は、出来るだけ形状を小さくするため比重の大きな物が好適で、例えば比重５以上の鉄、ステンレス、黄銅などが適している。   The material of the weight is preferably a material having a large specific gravity in order to make the shape as small as possible. For example, iron, stainless steel, brass or the like having a specific gravity of 5 or more is suitable.

本発明の実施の形態１に示した発電システムでは、機械共振部の作用により連続したエネルギーを発電部１１に加えることができるため、１度の加振であっても、数秒にわたってＬＥＤなどの発光素子１７を持続して光らせることができ、また繰り返し加振することにより、さらに持続して発光素子１７を光り続けさせることが可能となる。   In the power generation system shown in Embodiment 1 of the present invention, continuous energy can be applied to the power generation unit 11 by the action of the mechanical resonance unit, and thus light emission from an LED or the like takes several seconds even with a single excitation. The element 17 can be made to shine continuously, and by repeatedly oscillating, the light emitting element 17 can be made to continue to shine further.

なお、圧電体は表裏に電極を形成した単板構成で説明したが、圧電体と電極を交互に積層した積層構造にすることで、なお発光素子の発光輝度を高めることが出来る。   Note that although the piezoelectric body has been described as a single plate structure in which electrodes are formed on the front and back surfaces, the light emission luminance of the light emitting element can be increased by using a laminated structure in which piezoelectric bodies and electrodes are alternately stacked.

発明の他の応用例としては、本発明の発電システムを腰や自転車に付けて、夜間に位置を知らせる役割をするシステムに利用することもできる。   As another application example of the invention, the power generation system of the present invention can be applied to a waist or a bicycle and used for a system that serves to inform the position at night.

なお、電力の使用用途として、発光素子を例に説明したが、これに限定されるものではなく、例えば整流、蓄電することによりその他の電気、電子機器への電力の供給も可能になる。   In addition, although the light emitting element was demonstrated to the example as a use use of electric power, it is not limited to this, For example, electric power can be supplied to other electric and electronic devices by rectifying and storing electricity.

（実施の形態２）
図２は本発明の他の実施の形態における発電システムの一例を示す断面図であり、実施の形態２が実施の形態１と異なるのは、重り１２が２個のコイルバネ１３と対称に接続されていることである。それにより、重り１２は対称に配置された発電部１１の中心を結ぶ軸上（図示せず）に均等な力がかかるので、重り１２は発電部１１の中心を結ぶ軸（図示せず）を中心に往復振動する。重り１２の振動が軸よりはずれると、発電効率が悪くなるので、このような構成を取ることで、効率の高い発電が可能になる。また持続的な加振があった場合、発電部１１が２個になることで、２倍の電力が得られる。 (Embodiment 2)
FIG. 2 is a cross-sectional view showing an example of a power generation system according to another embodiment of the present invention. The difference between the second embodiment and the first embodiment is that the weight 12 is connected to two coil springs 13 symmetrically. It is that. As a result, the weight 12 applies an equal force on an axis (not shown) connecting the centers of the power generation units 11 arranged symmetrically, so that the weight 12 has an axis (not shown) connecting the centers of the power generation units 11. Vibrates in the center. If the vibration of the weight 12 deviates from the shaft, the power generation efficiency deteriorates. By adopting such a configuration, highly efficient power generation becomes possible. In addition, when there is continuous vibration, the number of power generation units 11 is two, so that twice as much power can be obtained.

さらに、重り１２の変位方向を規制するガイドが設けてあることで、より重り１２の変位は軸上に規制され、効率の高い発電が出来る。   Furthermore, since the guide for restricting the displacement direction of the weight 12 is provided, the displacement of the weight 12 is further regulated on the shaft, and highly efficient power generation can be performed.

また、過度の加振により重り１２が大きく変位して発電部１１などを破壊することのないように、重り１２の変位を規制するストッパー２０を設けている。   In addition, a stopper 20 that restricts the displacement of the weight 12 is provided so that the weight 12 is not greatly displaced due to excessive vibration to destroy the power generation unit 11 and the like.

また本実施の形態２では、金属板１８の両面に圧電体が接着されており、持続的な加振があった場合に、効率の高い発電が可能である。この構成を取る場合には、強度の弱い圧電体に機械共振部１４を接着する必要があるため、破損防止の対策をとる必要がある。   In the second embodiment, the piezoelectric body is bonded to both surfaces of the metal plate 18, and high-efficiency power generation is possible when there is continuous vibration. In the case of adopting this configuration, it is necessary to adhere the mechanical resonance portion 14 to a weak piezoelectric body, so it is necessary to take measures to prevent breakage.

なお、繰り返し振動は、コイルバネ１３で説明したが、それ以外の材質を使用しても良く、特にゴムを用いることで、軽量化が図れる。   In addition, although the repeated vibration was demonstrated with the coil spring 13, you may use a material other than that, and it can achieve weight reduction by using especially rubber | gum.

なお、本実施の形態では、一軸上に対称に重り１２が２個のコイルバネ１３と２個の発電部１１と接続されている例を示したが、発電部１１の中心を結ぶ複数軸に対称に２個のコイルバネ１３と２個の発電部１１を接続してもよい。例えば、図３に示すように筐体の中心に重り１２を配置し、３軸に対称に６個のコイルバネ１３と６個の発電部１１を配置することにより、いかなる方向からの加振に対しても効率よく発電できる。   In the present embodiment, an example in which the weight 12 is connected to the two coil springs 13 and the two power generation units 11 symmetrically on one axis is shown. However, the weight 12 is symmetric about a plurality of axes connecting the centers of the power generation units 11. Two coil springs 13 and two power generation units 11 may be connected to each other. For example, as shown in FIG. 3, a weight 12 is arranged at the center of the casing, and six coil springs 13 and six power generation units 11 are arranged symmetrically about three axes, so that vibrations from any direction can be prevented. However, it can generate electricity efficiently.

この発電ユニットを、ボールなどの内部に実装することで、ボールの中を光らせることが出来る。   By mounting this power generation unit inside a ball or the like, the inside of the ball can be illuminated.

（実施の形態３）
図４は本発明の他の実施の形態３における電子機器の一例を表すブロック図である。発電ユニット２１は、本発明の実施の形態１または２に記載の発電部であり、筐体を加振する事で発電する。蓄電部２２は、発電ユニット２１で発電された電力をダイオードなどを用いて整流し、電気二重層コンデンサや二次電池などの蓄電部品に蓄電する。また、蓄電部品からの出力は、３端子レギュレータなどにより所定の電圧になるように調整される。制御部２３は、蓄電部２２を介して発電ユニット２１で発電された電力により動作する。入力部２４は、重力センサ、加速度センサ、角加速度センサ、方位センサなどの電子機器の位置情報、変位、加速度を元にする入力装置で、電子機器を人の力により加振または移動することにより情報を制御部２３に伝達する。送信部２５は制御部２３により駆動され、入力部２４からの情報を外部機器２６に送信する。 (Embodiment 3)
FIG. 4 is a block diagram showing an example of an electronic device according to another embodiment 3 of the present invention. The power generation unit 21 is the power generation unit described in the first or second embodiment of the present invention, and generates power by exciting the casing. The power storage unit 22 rectifies the power generated by the power generation unit 21 using a diode or the like, and stores it in a power storage component such as an electric double layer capacitor or a secondary battery. Further, the output from the power storage component is adjusted to a predetermined voltage by a three-terminal regulator or the like. The control unit 23 operates with electric power generated by the power generation unit 21 via the power storage unit 22. The input unit 24 is an input device based on position information, displacement, and acceleration of an electronic device such as a gravity sensor, an acceleration sensor, an angular acceleration sensor, and an orientation sensor. The input unit 24 vibrates or moves the electronic device with human power. Information is transmitted to the control unit 23. The transmission unit 25 is driven by the control unit 23 and transmits information from the input unit 24 to the external device 26.

従来のリモートコントロールユニット（以下リモコン）は、本体側とケーブルなどで結ばれて情報のやりとりおよび電力の供給を行うか、赤外線などで通信をワイヤレスで行う場合には電池などを内蔵していた。本発明では、特にゲーム機などでリモコンへの入力が、その位置情報による場合、センサなどを主とする入力部２４と共に本発明の発電ユニット２１を設けることで、入力時のリモコンの振動を発電ユニットにて電力に変換するので、ケーブルおよび一次電池などが不要になる。   A conventional remote control unit (hereinafter referred to as a remote controller) is connected to the main body with a cable or the like to exchange information and supply power, or has a built-in battery or the like when communicating wirelessly with infrared rays or the like. In the present invention, in particular, when the input to the remote control is based on the position information in a game machine or the like, the power generation unit 21 of the present invention is provided together with the input unit 24 mainly including a sensor or the like to generate the vibration of the remote control at the time of input. Since it is converted into electric power by the unit, cables and primary batteries are unnecessary.

なお、入力部は位置情報を元にした例で説明したが、通常のスイッチやレバーなどの入力装置でも問題ない。   Although the input unit has been described based on the example based on the position information, there is no problem even with a normal input device such as a switch or a lever.

本発明にかかる発電システムは、圧電素子を有する発電部と、機械共振部と、を少なくとも有し、この機械共振部により持続して発電を行う発電システムであり、機械共振部の共振周波数を容易に設定することができるため、人力による加振のような比較的低い周波数であっても効率的に発電することが可能であり、携帯用などの小型の発電システム等に有用である。   A power generation system according to the present invention is a power generation system that has at least a power generation unit having a piezoelectric element and a mechanical resonance unit, and generates power continuously by the mechanical resonance unit. Therefore, it is possible to efficiently generate power even at a relatively low frequency such as vibration by human power, which is useful for a portable power generation system and the like.

本発明の実施の形態１における発電システムの一例の断面図Sectional drawing of an example of the electric power generation system in Embodiment 1 of this invention 本発明の実施の形態２における発電システムの一例の断面図Sectional drawing of an example of the electric power generation system in Embodiment 2 of this invention 本発明の実施の形態２における発電システムの他の一例の断面図Sectional drawing of the other example of the electric power generation system in Embodiment 2 of this invention 本発明の実施の形態３における電子機器のブロック図The block diagram of the electronic device in Embodiment 3 of this invention

符号の説明Explanation of symbols

１１ 発電部
１２ 重り
１３ コイルバネ
１４ 機械共振部
１５ 筐体
１６ 端子
１７ 発光素子
１８ 金属板
１９ 圧電体
２０ ストッパー
２１ 発電ユニット
２２ 蓄電部
２３ 制御部
２４ 入力部
２５ 送信部
２６ 外部機器
２７ ウエイト DESCRIPTION OF SYMBOLS 11 Power generation part 12 Weight 13 Coil spring 14 Mechanical resonance part 15 Case 16 Terminal 17 Light emitting element 18 Metal plate 19 Piezoelectric body 20 Stopper 21 Power generation unit 22 Power storage part 23 Control part 24 Input part 25 Transmission part 26 External apparatus 27 Weight

Claims (15)

圧電素子を有する発電部と、機械共振部と、を少なくとも有し、前記機械共振部により持続して発電を行うことを特徴とする発電システム。 A power generation system comprising at least a power generation unit having a piezoelectric element and a mechanical resonance unit, and generating power continuously by the mechanical resonance unit. 機械共振部は、少なくとも重りと、繰り返し伸縮する部材とを有し、前記繰り返し伸縮する部材は発電部と前記重りとの間に位置するものである請求項１に記載の発電システム。 The power generation system according to claim 1, wherein the mechanical resonance unit includes at least a weight and a member that repeatedly expands and contracts, and the member that repeatedly expands and contracts is positioned between the power generation unit and the weight. 重りの重さは、前記重りを含む発電システム全体の重さの１／２以下である請求項２に記載の発電システム。 The power generation system according to claim 2, wherein a weight of the weight is equal to or less than ½ of a weight of the entire power generation system including the weight. 機械共振部は人の力により加振して機械共振を起こすものである請求項１〜３のいずれかに記載の発電システム。 The power generation system according to any one of claims 1 to 3, wherein the mechanical resonance unit is caused to vibrate by mechanical force to cause mechanical resonance. 機械共振部の共振周波数が１００Ｈｚ以下である請求項１〜４のいずれかに記載の発電システム。 The power generation system according to any one of claims 1 to 4, wherein a resonance frequency of the mechanical resonance unit is 100 Hz or less. 発電部は、１つまたは複数の圧電体を用いて機械共振部の運動により発電するものである請求項１〜５のいずれかに記載の発電システム。 The power generation system according to any one of claims 1 to 5, wherein the power generation unit generates power by movement of the mechanical resonance unit using one or a plurality of piezoelectric bodies. 重りは複数の繰り返し伸縮する部材と接続されている請求項１〜６のいずれかに記載の発電システム。 The power generation system according to any one of claims 1 to 6, wherein the weight is connected to a plurality of members that repeatedly expand and contract. 機械共振部は、一軸方向に変位するようにガイドが設けられた請求項１〜７のいずれかに記載の発電システム。 The power generation system according to claim 1, wherein the mechanical resonance unit is provided with a guide so as to be displaced in a uniaxial direction. ガイド部は、変位の大きさを制限するためのストッパーを設けた請求項８に記載の発電システム。 The power generation system according to claim 8, wherein the guide portion is provided with a stopper for limiting the magnitude of displacement. 複数の伸縮する部材は、重りを中心に対称に設けられている請求項７に記載の発電システム。 The power generation system according to claim 7, wherein the plurality of members that expand and contract are provided symmetrically about the weight. ２個の発電部と２個の繰り返し伸縮する部材の略中心に重りが設けられている請求項１０に記載の発電システム。 The power generation system according to claim 10, wherein a weight is provided at substantially the center of the two power generation units and the two members that repeatedly expand and contract. 少なくとも発電部と、機械共振部と、発光素子とを有し、機械共振部の運動により発電部で発電した電気により前記発光素子を発光させる請求項１〜１１のいずれかに記載の発電システム。 The power generation system according to claim 1, further comprising at least a power generation unit, a mechanical resonance unit, and a light emitting element, wherein the light emitting element emits light by electricity generated by the power generation unit by movement of the mechanical resonance unit. 少なくとも発電部と、機械共振部と、蓄電部と、制御部とを有し、前記機械共振部の運動により前記発電部で発電した電力により前記マイコンを駆動させる請求項１〜５のいずれかに記載の発電システム。 6. The microcomputer according to claim 1, comprising at least a power generation unit, a mechanical resonance unit, a power storage unit, and a control unit, wherein the microcomputer is driven by electric power generated by the power generation unit by movement of the mechanical resonance unit. The power generation system described. 圧電素子を有する発電部と、機械共振部と、蓄電部と、制御部と、入力部と、前記入力部からの情報を外部に送信する送信部と、を少なくとも有し、前記機械共振部の運動により前記発電部で発電した電力により前記制御部を駆動させるとともに、前記入力部からの情報を外部に送信することを特徴とする電子機器。 A power generation unit including a piezoelectric element; a mechanical resonance unit; a power storage unit; a control unit; an input unit; and a transmission unit that transmits information from the input unit to the outside. An electronic apparatus characterized in that the control unit is driven by power generated by the power generation unit by movement and information from the input unit is transmitted to the outside. 入力部は、電子機器を加振することにより情報を入力する請求項１４に記載の電子機器。 The electronic device according to claim 14, wherein the input unit inputs information by exciting the electronic device.
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