JPH025036A - Power source changing device - Google Patents
Power source changing deviceInfo
- Publication number
- JPH025036A JPH025036A JP63157452A JP15745288A JPH025036A JP H025036 A JPH025036 A JP H025036A JP 63157452 A JP63157452 A JP 63157452A JP 15745288 A JP15745288 A JP 15745288A JP H025036 A JPH025036 A JP H025036A
- Authority
- JP
- Japan
- Prior art keywords
- power source
- circuit
- battery
- power supply
- power
- 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.)
- Granted
Links
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000003384 imaging method Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Exposure Control For Cameras (AREA)
- Stroboscope Apparatuses (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
本発明は電源切換装置、詳しくはストロボを動作させる
電池電源からなる第１電源と電子カメラの駆動回路を動
作させる電池電源からなる第２電源とを有する電子スチ
ルカメラの電源切換装置に関するものである。[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a power supply switching device, specifically, a first power supply consisting of a battery power supply for operating a strobe, and a second power supply consisting of a battery power supply for operating a drive circuit of an electronic camera. The present invention relates to a power switching device for an electronic still camera.
［従来の技術］
周知のように、ストロボ発光装置を有していて、駆動用
電源に電池電源が用いられている電子スチルカメラにお
いては、ストロボ駆動回路を動作させる電源電池とカメ
ラの駆動回路を動作させる電源電池とにそれぞれ別個の
専用電池が使用されているものと、上記再駆動回路に１
個の電源電池から給電するものとがある。[Prior Art] As is well known, in an electronic still camera that has a strobe light emitting device and uses a battery power source as a driving power source, the power source battery that operates the strobe drive circuit and the camera drive circuit are connected. One in which a separate dedicated battery is used for the power supply battery to operate, and one in the re-driving circuit.
Some power sources are powered by batteries.
この場合、電子スチルカメラの駆動回路とストロボの駆
動回路とにそれぞれ別個の専用電池から給電する電子ス
チルカメラでは、第４図に示すように電子スチルカメラ
の駆動回路１４には、例えば充電可能なニッケルカドミ
ウム電池からなる第２電源１２から給電され、またスト
ロボの駆動回路１５にはアルカリ電池等の１次電池から
なる第１電源１１から給電されるように構成される。こ
れに対し、１個の電池電源から電子スチルカメラの駆動
回路とストロボの駆動回路にそれぞれ給電する電子スチ
ルカメラでは、第５図に示すように電子カメラの駆動回
路１４とストロボの駆動回路１５に給電する容量の大き
い１個の電池電源１３が用いられる。In this case, in an electronic still camera in which power is supplied to the electronic still camera drive circuit and the strobe drive circuit from separate dedicated batteries, as shown in FIG. Power is supplied from a second power source 12 consisting of a nickel cadmium battery, and power is supplied to the strobe drive circuit 15 from a first power source 11 consisting of a primary battery such as an alkaline battery. On the other hand, in an electronic still camera in which power is supplied to the electronic still camera drive circuit and the strobe drive circuit from one battery power source, the electronic camera drive circuit 14 and the strobe drive circuit 15 are supplied with power, as shown in FIG. One battery power source 13 with a large power supply capacity is used.
［発明か解決しようとする課題］
ところで、電子カメラの駆動回路系１４と、ストロボの
充電のための駆動回路系］５とにそれぞれ別の専用電源
１２，１．１を設けた第４図に示す電子カメラでは、電
源がそれぞれ独立しているため、例えば、電子カメラの
駆動回路系１４に給電する第２電源１２の電池容量が同
駆動回路系の回路機能を満足させるレベルを下廻っても
、ストロボの充電用駆動回路系１５に給電する第１電源
１１の電池容量は充分であるという状態か生じ、これに
よってそれぞれの電池電源は各回路系の電力消費に応じ
て・交換しなければならないという煩わしさがある。[Problem to be solved by the invention] By the way, in FIG. In the illustrated electronic camera, the power supplies are independent, so even if the battery capacity of the second power supply 12 that supplies power to the drive circuit system 14 of the electronic camera falls below a level that satisfies the circuit function of the drive circuit system, A situation arises in which the battery capacity of the first power supply 11 that supplies power to the charging drive circuit system 15 of the strobe is sufficient, and as a result, each battery power supply must be replaced according to the power consumption of each circuit system. It's annoying.
一方、電子カメラの駆動回路系１４とストロボの充電回
路系１５とに１個の電源］３から給電する第５図に示す
電子カメラでは、ストロボの充電期間中に発生するノイ
ズが問題となる。即ち、ストロボの充電期間中には同充
電回路系１５内のＤＣ−ＤＣコンバータが動作する際に
、スイッチングノイズが多量に発生する。従ってこのス
トロボの充電回路系１５の作動中に電子カメラの駆動回
路系］４を同時に動作させると、電子カメラの駆動回路
系１４の電源ラインに上述の大変大きなノイズか重畳さ
れ、これによってカメラ動作か不安定になるという欠点
があった。On the other hand, in the electronic camera shown in FIG. 5 in which power is supplied to the electronic camera drive circuit system 14 and the strobe charging circuit system 15 from a single power supply 3, noise generated during the strobe charging period becomes a problem. That is, during the strobe charging period, a large amount of switching noise is generated when the DC-DC converter in the charging circuit system 15 operates. Therefore, if the electronic camera drive circuit system 4 is operated simultaneously while the strobe charging circuit system 15 is operating, the above-mentioned very large noise will be superimposed on the power line of the electronic camera drive circuit system 14, which will cause the camera to operate. The drawback was that it became unstable.
そこで、このようなノイズによるカメラ動作の不安定さ
を避けるために、第６図に示すように、ストロボの充電
期間中のみ電子カメラの駆動回路系１４の回路動作を一
時停止するような手段が採用されている。しかしながら
、このように構成すると、電子カメラの電源スィッチを
オンしてから、シャッタトリガ釦を押下できる状態にな
るまでの待期時間か非常に長くかかってしまってシャッ
タチャンスを逸してしまうという問題点が新たに生しる
。Therefore, in order to avoid instability of camera operation due to such noise, as shown in FIG. It has been adopted. However, with this configuration, there is a problem that it takes a very long time to wait from when the power switch of the electronic camera is turned on until the shutter trigger button can be pressed, resulting in missed photo opportunities. is born anew.
従って、ストロボ充電時のノイズの電気駆動系への影響
をなくし、撮影までのタイムロスを短くすることが望ま
れる。Therefore, it is desirable to eliminate the influence of noise on the electric drive system during strobe charging and to shorten the time loss until photographing.
本発明の目的は、上記従来の電子スチルカメラにおける
電源装置の欠点を除去し、第１電源と第２電源の各電池
の容量が略同じように消費される電子カメラにおける電
源切換装置を提供するにある。An object of the present invention is to eliminate the drawbacks of the power supply device in the conventional electronic still camera described above, and to provide a power supply switching device in an electronic camera in which the capacity of each battery of the first power supply and the second power supply is consumed approximately the same. It is in.
［課題を解決するための手段および作用］本発明の電源
切換装置は、ストロボ駆動回路に接続され得る第１電源
と、電子カメラ用電源ラインに接続可能となされ充電可
能な第２電源と、上記第１電源がストロボ駆動回路に接
続されている期間以外は上記第１電源により第２電源を
充電すべく回路の切換を行なう接続切換回路と、を具備
したことを特徴とするものである。[Means and Effects for Solving the Problems] The power supply switching device of the present invention includes a first power supply that can be connected to a strobe drive circuit, a second power supply that can be connected to an electronic camera power line and is rechargeable, and the above-mentioned power supply switching device. The present invention is characterized by comprising a connection switching circuit that switches the circuit so that the second power source is charged by the first power source except during a period when the first power source is connected to the strobe drive circuit.
［実 施 例］
以下、図面を参照して本発明を具体的に説明する。第１
図は、本発明の一実施例を示す電子カメラにおける電源
切換装置の回路図である。図において、第１電源１は、
例えばアルカリ乾電池のような１次電池で前記従来例の
第４図で説明した電源１１と略同程度の電池容量を有す
る。また第２電源２はニッケルカドミウム電池のように
充電可能な２次電池で、第１電源１より小さい電池容量
を有し、従って、その大きさも小型である。そして、第
１電源１は接続切換回路６に接続されている。この接続
切換回路６は、アナログスイッチ等で構成され、図示し
ないシーケンスコントローラからのＬ／Ｈ信号によって
作動するもので、ストロボ充電期間中のみ、第１図に示
すようにコモン端子Ｔｃと端子Ｔ１間かメイクし、スト
ロボ充電期間中以外のときはコモン端子Ｔｃと端子１２
間がメイクする。この接続切換回路６の端子Ｔ１には、
ストロボの駆動回路５が接続されている。ストロボ駆動
回路５は、第１電源１の電池電圧を、例えば３００〜５
００ｖに昇圧すルＤＣ−ＤＣ：ＩＩンバータおよびこの
昇圧された電圧で充電される主コンデンサやキセノン放
電管のトリガ回路等で構成される周知の回路である。[Example] The present invention will be specifically described below with reference to the drawings. 1st
The figure is a circuit diagram of a power supply switching device in an electronic camera showing an embodiment of the present invention. In the figure, the first power supply 1 is
For example, it is a primary battery such as an alkaline dry battery and has approximately the same battery capacity as the power source 11 described in FIG. 4 of the conventional example. Further, the second power source 2 is a rechargeable secondary battery such as a nickel cadmium battery, has a smaller battery capacity than the first power source 1, and is therefore smaller in size. The first power source 1 is connected to a connection switching circuit 6. This connection switching circuit 6 is composed of an analog switch, etc., and is operated by an L/H signal from a sequence controller (not shown), and is connected between the common terminal Tc and the terminal T1 only during the strobe charging period, as shown in FIG. and the common terminal Tc and terminal 12 except during the strobe charging period.
Ma makes up. At the terminal T1 of this connection switching circuit 6,
A strobe drive circuit 5 is connected. The strobe drive circuit 5 sets the battery voltage of the first power source 1 to 300 to 500, for example.
This is a well-known circuit consisting of a DC-DC:II inverter that boosts the voltage to 00V, a main capacitor that is charged with this boosted voltage, a trigger circuit for a xenon discharge tube, and the like.
そして、上記接続切換回路６の端子Ｔ２は、充電回路３
を介して第２電源２の電極端子に接続されている。この
充電回路３は、例えばその−例を第２図に示すように、
逆流防止用のダイオードＤ と、電流制限抵抗Ｒ１とか
直列接続された回路で構成されている。上記逆流防止用
ダイオードＤ１の役目は、ストロボの使用頻度が極端に
高くなり、第１電源］の電池電圧Ｖ１が第２電源２の電
池電圧Ｖ２より低くなると、上記タイオードＤ１がない
場合には第１電源１には第２電源２より電流が流れ込む
。しかし、第１電源１は、前述した如くアルカリ電池の
ような１次電池であり、１次電池の充電は爆発等の危険
があるため厳重に禁止されている。従って、上記逆流防
止用ダイオドＤ１によりこのような事態を防止している
。The terminal T2 of the connection switching circuit 6 is connected to the charging circuit 3.
It is connected to the electrode terminal of the second power source 2 via. This charging circuit 3 is, for example, as shown in FIG.
It consists of a circuit connected in series with a diode D for preventing backflow and a current limiting resistor R1. The role of the backflow prevention diode D1 is that when the frequency of use of the strobe becomes extremely high and the battery voltage V1 of the first power supply becomes lower than the battery voltage V2 of the second power supply 2, the function of the diode D1 is to A current flows into the first power source 1 from the second power source 2. However, as described above, the first power source 1 is a primary battery such as an alkaline battery, and charging of the primary battery is strictly prohibited due to the risk of explosion. Therefore, such a situation is prevented by the backflow prevention diode D1.
また、電流制限抵抗Ｒ１は、第１電源１より第２電源２
に流入する充電電流１１が第２電源２として使用される
充電可能電池の種類によって定まる最高充電電流を超え
ないようにするために挿入された抵抗で、定電流回路等
に置換されれば、なお好ましい。Further, the current limiting resistor R1 is connected to the second power source 2 from the first power source 1.
If it is replaced with a constant current circuit or the like with a resistor inserted to prevent the charging current 11 flowing into the second power source 2 from exceeding the maximum charging current determined by the type of rechargeable battery used as the second power source 2, it will be even better. preferable.
そして、上記充電回路３の出力端は、第２電源２の電極
端子に接続され、同第２電源２の出力端は電子カメラ用
電源ライン７によって撮像系、記録系、 ７Ｉｌｌｌ光
系等で構成される電子カメラの駆動回路系４に接続され
ている。The output terminal of the charging circuit 3 is connected to the electrode terminal of the second power supply 2, and the output terminal of the second power supply 2 is connected to the electronic camera power supply line 7, and is configured with an imaging system, a recording system, a 7Ill light system, etc. It is connected to a drive circuit system 4 of an electronic camera.
このように構成された本実施例の動作を第３図のタイミ
ングチャートによって説明すると、電子カメラの電源ス
ィッチ（図示せず）が時刻ｔ１て投入されると、第２電
源２から電子カメラ駆動回路４に給電され、同回路４の
撮像系、記録系、 ７１１１１光系等か所定のシーケン
スに従ってカメラ動作を開始する。この時点ては、朱た
ストロボ充電指令か出されていないので、接続切換回路
６はコモン端子Ｔｃと端子Ｔ２がメイクした充電回路３
側にある。従って、ストロボ駆動回路５は作動せず、第
２電源２には充電回路３を介して第１電源より充電され
ている。つまり、第２電／ｒｊ、２は第１電源１により
フローティング充電されなから電子カメラ駆動回路４に
給電する。The operation of this embodiment configured in this way will be explained with reference to the timing chart of FIG. 3. When the power switch (not shown) of the electronic camera is turned on at time t1, the electronic camera drive circuit is 4, and the imaging system, recording system, optical system 71111, etc. of the same circuit 4 start camera operation according to a predetermined sequence. At this point, the red strobe charging command has not been issued, so the connection switching circuit 6 is connected to the charging circuit 3 with the common terminal Tc and terminal T2 connected.
It's on the side. Therefore, the strobe drive circuit 5 does not operate, and the second power source 2 is charged from the first power source via the charging circuit 3. In other words, the second electric current /rj,2 is not floatingly charged by the first power source 1 and is then fed to the electronic camera drive circuit 4.
時刻ｔ２になると、ストロホを充電させる指令か電子カ
メラ側から出力され、これによって接続切換回路６が作
動し、コモン端子Ｔｃと端子Ｔ１とがメイクしストロボ
駆動回路５側に切換わる。At time t2, a command to charge the strobe is output from the electronic camera side, which activates the connection switching circuit 6, connects the common terminal Tc and the terminal T1, and switches to the strobe drive circuit 5 side.
するとストロボ駆動回路５には第１電源］より給電され
るのでストロボの充電が開始される。この充電開始によ
り第２電源２は第１電源１によるフローティング充電が
断たれるが、自己の電池容量により電子カメラ駆動回路
４には給電を持続するので、これによってカメラ動作は
継続する。Then, the strobe drive circuit 5 is supplied with power from the first power supply, and charging of the strobe is started. As a result of this start of charging, the floating charging of the second power source 2 by the first power source 1 is cut off, but the electronic camera drive circuit 4 continues to be powered by its own battery capacity, so that the camera operation continues.
ストロボ充電が完了する時刻ｔ３になると、接続切換回
路６が再び充電回路３側に切換わるので、第２電源２は
再度第１電源１からフローティング充電され、次にスト
ロボを発光させる指令があるまでこの状態を継続する。When the strobe charging is completed at time t3, the connection switching circuit 6 switches again to the charging circuit 3 side, so the second power source 2 is floating-charged again from the first power source 1 until the next command to fire the strobe is received. Continue this state.
次で発光指令があると、時刻ｔ４．ｔ５に示すようにス
トロボの発光が行なわれ、ここに同調撮影が行なわれる
。Next, when a light emission command is issued, time t4. As shown at t5, the strobe light is emitted, and synchronized photographing is performed at this time.
［発明の効果］
以上述べたように本発明によれば、次のような顕著な効
果が発揮される。即ち、ストロボ充電期間中を除けば、
充電可能電池からなる第２電源を、第１電源でフローテ
ィング充電しながら使用しているので、第１電源と第２
電源の消耗度合が何れか一方に著しく片寄ることがなく
、両型源を総合的に見たとき寿命（充電間隔）か延長さ
れ、しかも第２電源の容量値を小さくすることができ、
従って小型化を図ることかできる。そして、ストロボ充
電期間中は、第１電源からストロボ駆動回路に、第２電
源から電子カメラ駆動回路に、それぞれ独立に給電する
ので、ストロボ充電期間中に発生するノイズが電子カメ
ラ駆動回路に悪影響を与える虞れがなく、ストロボ充電
期間中も正常なカメラ動作か得られる。[Effects of the Invention] As described above, according to the present invention, the following remarkable effects are exhibited. That is, except during the strobe charging period,
Since the second power source consisting of a rechargeable battery is used while floating charging with the first power source, the first power source and the second power source are
The degree of consumption of the power source is not significantly biased towards one side, the lifespan (charging interval) is extended when looking at both types of power sources comprehensively, and the capacity value of the second power source can be reduced.
Therefore, miniaturization can be achieved. During the strobe charging period, power is supplied to the strobe drive circuit from the first power supply and to the electronic camera drive circuit from the second power supply, respectively, so that noise generated during the strobe charging period has an adverse effect on the electronic camera drive circuit. There is no risk of damage, and normal camera operation can be obtained even during the strobe charging period.
第１図は、本発明の一実施例を示す電源切換装置の電気
回路の構成ブロック図、
第２図は、上記第１図における充電回路の具体例を示す
電気回路線図、
第３図は、上記第１図の電源切換装置における各部の動
作を示すタイミングチャート、第４図、第５図は、従来
の電源切換装置の構成をそれぞれ示すブロック図、
第６図は、上記第５図に示す従来の電源切換装置のタイ
ミングチャートである。
］０
１・・・・・・・・第１電源
２・・・・・・・第２電源
５・・・・・・・・・ストロボ駆動回路６・・・・・・
・・・接続切換回路FIG. 1 is a block diagram illustrating the configuration of an electric circuit of a power supply switching device according to an embodiment of the present invention, FIG. 2 is an electric circuit diagram illustrating a specific example of the charging circuit in FIG. 1, and FIG. , a timing chart showing the operation of each part in the power switching device shown in FIG. 1, FIGS. 4 and 5 are block diagrams showing the configuration of a conventional power switching device, and FIG. 2 is a timing chart of a conventional power supply switching device shown in FIG. ]0 1......First power supply 2...Second power supply 5...Strobe drive circuit 6...
...Connection switching circuit
Claims (1)
子カメラ用電源ラインに接続可能となされ充電可能な第
２電源と、 上記第１電源がストロボ駆動回路に接続されている期間
以外は上記第１電源により第２電源を充電すべく回路の
切換を行なう接続切換回路と、を具備したことを特徴と
する電源切換装置。(1) A first power source that can be connected to the strobe drive circuit; a second power source that can be connected to the electronic camera power line and is rechargeable; except for the period when the first power source is connected to the strobe drive circuit; A power supply switching device comprising: a connection switching circuit that switches a circuit to charge a second power supply with a first power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63157452A JP2641508B2 (en) | 1988-06-24 | 1988-06-24 | Power supply switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63157452A JP2641508B2 (en) | 1988-06-24 | 1988-06-24 | Power supply switching device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH025036A true JPH025036A (en) | 1990-01-09 |
| JP2641508B2 JP2641508B2 (en) | 1997-08-13 |
Family
ID=15649968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63157452A Expired - Fee Related JP2641508B2 (en) | 1988-06-24 | 1988-06-24 | Power supply switching device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2641508B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000166434A (en) * | 1998-12-02 | 2000-06-20 | Shimano Inc | Electric source device in fishing reel |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000305145A (en) * | 1999-04-20 | 2000-11-02 | Olympus Optical Co Ltd | Camera |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5339738A (en) * | 1976-09-24 | 1978-04-11 | Konishiroku Photo Ind Co Ltd | Camera with secondary battery |
-
1988
- 1988-06-24 JP JP63157452A patent/JP2641508B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5339738A (en) * | 1976-09-24 | 1978-04-11 | Konishiroku Photo Ind Co Ltd | Camera with secondary battery |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000166434A (en) * | 1998-12-02 | 2000-06-20 | Shimano Inc | Electric source device in fishing reel |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2641508B2 (en) | 1997-08-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |