JPS595855Y2 - flash camera - Google Patents
flash cameraInfo
- Publication number
- JPS595855Y2 JPS595855Y2 JP1981085756U JP8575681U JPS595855Y2 JP S595855 Y2 JPS595855 Y2 JP S595855Y2 JP 1981085756 U JP1981085756 U JP 1981085756U JP 8575681 U JP8575681 U JP 8575681U JP S595855 Y2 JPS595855 Y2 JP S595855Y2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- flash device
- power supply
- electronic
- power source
- 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
Links
Landscapes
- Indication In Cameras, And Counting Of Exposures (AREA)
- Exposure Control For Cameras (AREA)
- Stroboscope Apparatuses (AREA)
Description
【考案の詳細な説明】
本考案は電子シャツタ回路と電子閃光装置とを組合せた
フラッシュカメラに関する。[Detailed Description of the Invention] The present invention relates to a flash camera that combines an electronic shutter circuit and an electronic flash device.
従来から被写体輝度を検出して、その被写体輝度に応じ
て自動的に露出量を制御できるカメラでは、露出インタ
ーバルを作り出すための電子シャツタ回路の駆動に電源
電池が用いられている。Conventionally, cameras that can detect the brightness of a subject and automatically control the amount of exposure according to the brightness of the subject use a power battery to drive an electronic shutter circuit for creating exposure intervals.
そしてこのカメラには電源電池の寿命を撮影者に事前に
知らせしめる必要から、電源電池の端子電圧を検出して
電池寿命の限界を表示する検知装置が設けられている。Since it is necessary to inform the photographer in advance of the lifespan of the power supply battery, this camera is equipped with a detection device that detects the terminal voltage of the power supply battery and displays the limit of the battery life.
係るカメラと電子閃光装置とを組み合せた場合、電池の
検知装置は撮影者にとって有効なものとなるが、カメラ
と電子閃光装置用の電源電池を共用した場合、電子シャ
ツタ回路の動作限界電圧と電子閃光装置の動作限界電圧
との間に差異があるため、一つの電源電池を電子シャツ
タ回路と電子閃光装置の両者に使用させる電子閃光装置
を動作させての撮影時と電子シャツタ回路のみを動作さ
せての自然光撮影時とで検知電圧に差を持たせることが
必要になる。When such a camera and electronic flash device are combined, the battery detection device becomes effective for the photographer, but when the camera and electronic flash device share a power supply battery, the operating limit voltage of the electronic flash device Because there is a difference between the operating limit voltage of the flash device, one power battery is used for both the electronic shutter circuit and the electronic flash device.When shooting with the electronic flash device operating, and when only the electronic shutter circuit is activated. It is necessary to create a difference in the detection voltage between natural light photography and natural light photography.
ところで異なる二つの負荷の使用条件を考慮して電源電
池を検出するものとして実公昭
４８−３２３３６号公報があり、このものは異なる負荷
の第１と第２の使用条件に対応させて電池電圧の検出回
路を構或して電圧を検出している。By the way, there is Japanese Utility Model Publication No. 48-32336 which detects the power supply battery considering the usage conditions of two different loads. A detection circuit is configured to detect the voltage.
しかしながら、この装置では電圧検出するのに負荷を電
源電池から切り離し、次いで負荷の使用条件に対応して
電圧検出回路を形或して電圧検出を行っており、操作性
を欠いている。However, in order to detect voltage, this device disconnects the load from the power source battery, and then configures a voltage detection circuit in accordance with the usage conditions of the load to perform voltage detection, and thus lacks operability.
このことは、例えば負荷がストロボ装置における閃光放
電管に発光のエネルギーを与える容量値の大きいコンデ
ンサの充電途上において電池の検知を行うといった場合
には電池の接続を切り離し、電池の検知を行い、その後
再度電池接続を行うという操作が必要となり操作性の悪
さからコンデンサの充電に時間を要し写真撮影のチャン
スを逸することにもなりかねない。This means that, for example, when the load is to detect a battery while it is charging a capacitor with a large capacity that provides energy for light emission to a flash discharge tube in a strobe device, the battery is disconnected, the battery is detected, and then the battery is detected. It is necessary to reconnect the battery, and due to the poor operability, it takes time to charge the capacitor, which may result in a missed photo opportunity.
したがって、電池の電圧検知動作は電源に負荷を接続し
た場合と同様の状態で行うことが好ましく、特に上述し
たように電子閃光装置の場合には必要となる。Therefore, it is preferable to perform the battery voltage detection operation in the same state as when a load is connected to the power source, and this is especially necessary in the case of an electronic flash device as described above.
本考案はかかる点に鑑みてなされたもので、電子シャツ
タ回路、電子閃光装置を備え単一電源を使用するフラッ
シュカメラにおいて、電源の負荷への供給を制御すると
同時に検知電圧レベルの異なる電圧検出回路への接続状
態をも制御する如くの単一のスイッチを備え、かつ電圧
検出回路は電源がシャツタ回路又は電子閃光装置に接続
された状態で動作するフラッシュカメラを提供するもの
で以下、図面と共に説明する。The present invention has been made in view of the above points, and is intended to be used in a flash camera that is equipped with an electronic shutter circuit and an electronic flash device and uses a single power supply. The present invention provides a flash camera that is equipped with a single switch that also controls the connection state to the shutter circuit, and the voltage detection circuit operates with the power supply connected to the shutter circuit or the electronic flash device. do.
第１図は本考案の一実施例を示したもので、１は電子シ
ャツタ回路であり、２は電子閃光装置である。FIG. 1 shows an embodiment of the present invention, where 1 is an electronic shutter circuit and 2 is an electronic flash device.
今、切換スイッチ４を接点イ側に切換えて電源電池３を
電子シャツタ回路１に接続して電源を供給する。Now, changeover switch 4 is switched to contact A side, power supply battery 3 is connected to electronic shutter circuit 1, and power is supplied.
そして電子シャツタ回路の動作限界電圧をＥ１とする。The operating limit voltage of the electronic shutter circuit is assumed to be E1.
また、前記切換スイッチ４のイ側への切換えによって、
これと連動して切換スイッチ４を接点ハ側に切換えて電
圧検出回路５にも電源を供給する。Moreover, by switching the changeover switch 4 to the A side,
In conjunction with this, the changeover switch 4 is switched to the contact C side, and power is also supplied to the voltage detection circuit 5.
しかして、抵抗６と抵抗７との分割電圧によってシャツ
タ回路と電子閃光装置に共用する電源電池３の端子電圧
がＥ０以上の場合にはトランジスタＢが動作して発光ダ
イオード等の発光表示素子９が点灯するので、電源電池
３の端子電圧は電子シャツタ回路１を動作するに可能な
電圧にさることがわかる。Therefore, when the terminal voltage of the power supply battery 3 shared by the shutter circuit and the electronic flash device is equal to or higher than E0 due to the divided voltage between the resistor 6 and the resistor 7, the transistor B operates and the light emitting display element 9 such as a light emitting diode is activated. Since the light is on, it can be seen that the terminal voltage of the power supply battery 3 is higher than the voltage possible to operate the electronic shutter circuit 1.
一方、切換スイッチ４を接点口側に切換えて電子閃光装
置２に電源の供給を行なうと、電子閃光装置２はコンテ
゛ンサ負荷である関係から切換スイッチの投入時、すな
わちコンデンサ１０への充電が行なわれている間におい
て負荷が一番重くなり、その後コンデンサ１０の充電が
進行して行くに従って負荷が軽くなる（第２図曲線Ａ参
照）。On the other hand, when the changeover switch 4 is switched to the contact port side to supply power to the electronic flash device 2, since the electronic flash device 2 is a capacitor load, when the changeover switch is turned on, that is, the capacitor 10 is not charged. The load is at its heaviest while the capacitor 10 is charging, and then becomes lighter as the capacitor 10 is charged (see curve A in FIG. 2).
従って電源電池３の端子電圧は曲線Ａに示す負荷特性に
対応して曲線Ｂに示す如き負荷が重い場合には低く、負
荷が軽くなるに従って高くなる傾向を示す。Accordingly, the terminal voltage of the power supply battery 3 tends to be low when the load is heavy as shown by the curve B, and to increase as the load becomes lighter, corresponding to the load characteristic shown by the curve A.
ところで、電子閃光装置２には、コンデンサ１０への充
電電圧が所定値に達するとネオン管等の表示素子１１に
よって使用可能な状態を表示する充電表示回路を有して
おり、この充電表示電圧に所定の充電時間を経ても達し
なくなる状態を電源電池の寿命（以下表示限界電圧と称
す）としている関係から、先に説明したコンデンサ負荷
による変動分と閃光表示限界電圧とを考慮して特定の動
作限界電圧Ｅ２ （以下電子閃光装置の使用限界電圧Ｅ
２と称する）を設定する必要がある。By the way, the electronic flash device 2 has a charging display circuit that displays a usable state using a display element 11 such as a neon tube when the charging voltage to the capacitor 10 reaches a predetermined value. Since the life of the power supply battery (hereinafter referred to as the display limit voltage) is defined as the state in which the state is not reached even after a predetermined charging time, certain operations are performed taking into account the fluctuations due to the capacitor load and the flash display limit voltage explained earlier. Limit voltage E2 (hereinafter referred to as the operating limit voltage E of the electronic flash device)
2) must be set.
今、仮にＥ２を第２図点線Ｃに示す電圧と仮定すると、
切換スイッチ４の口側の切換えに連動して切換えられた
接点二側を介して接続された抵抗１２の抵抗値を調整す
ることでトランジスタ８をＥ２の電源電圧以上の場合に
は導通させることができ、発光表示素子９を点灯させて
電子閃光装置の使用限界にあたる電源電池３の端子電圧
を表示させることができる。Now, if we assume that E2 is the voltage shown by the dotted line C in Figure 2,
By adjusting the resistance value of the resistor 12 connected through the contact 2 side which is switched in conjunction with the switching of the opening side of the changeover switch 4, the transistor 8 can be made conductive when the voltage is equal to or higher than the power supply voltage of E2. By lighting the light-emitting display element 9, it is possible to display the terminal voltage of the power supply battery 3, which is at the limit of use of the electronic flash device.
以上説明したように、本考案は使用限界電圧を互いに異
にするそれぞれの負荷への電源の供給を切換える切換ス
イッチに連動して別設のスイッチ回路によって電圧検出
回路の表示レベルを切換え、それぞれの負荷に対応した
共用電源電池の端子電圧の検出を行なうものである。As explained above, the present invention switches the display level of the voltage detection circuit using a separate switch circuit in conjunction with the changeover switch that switches the supply of power to each load with different service limit voltages. This detects the terminal voltage of the shared power supply battery corresponding to the load.
この電池電圧検出回路による電圧検出は、電子シャツタ
回路または電子閃光装置の使用中に行うことができるの
で電圧検出に際しては電源供給を停止するといった操作
の必要もなく電圧検出ができ操作性の優れたものにする
ことができる。Voltage detection using this battery voltage detection circuit can be performed while the electronic shutter circuit or electronic flash device is in use, so there is no need to stop the power supply when detecting the voltage, and the voltage can be detected with excellent operability. can be made into something.
また電子シャツタ回路または電子閃光装置への電源供給
スイッチと電池電圧検出回路の電圧検出動作を連動させ
ているので使用者に電子シャツタ回路あるいは電子閃光
装置いずれの電圧検出かを識別させる必要がない。Further, since the power supply switch to the electronic shutter circuit or the electronic flash device and the voltage detection operation of the battery voltage detection circuit are linked, there is no need for the user to identify which voltage is being detected by the electronic shutter circuit or the electronic flash device.
第１図は本考案の一実施例であるフラッシュカメラの回
路図、第２図は電源電池の負荷による端子電圧の変動を
示す特性図である。
１・・・・・・電子シャツタ回路、２・・・・・・電子
閃光装置、３・・・・・・電源電池、４・・・・・・切
換スイッチ、５・・・・・・電圧検出回路、６，７・・
・・・・抵抗、８・・・・・・トランジスタ、９・・・
・・・発光表示素子、１０・・・・・・コンテ゛ンサ、
１２・・・・・・抵抗。FIG. 1 is a circuit diagram of a flash camera which is an embodiment of the present invention, and FIG. 2 is a characteristic diagram showing variations in terminal voltage due to load on a power source battery. 1...Electronic shutter circuit, 2...Electronic flash device, 3...Power battery, 4...Selector switch, 5...Voltage Detection circuit, 6, 7...
...Resistor, 8...Transistor, 9...
...Light-emitting display element, 10...Container,
12...Resistance.
Claims (1)
ャツタ回路と電子閃光装置とを組み合わせ、同一電源に
て前記電子シャツタ回路、電子閃光装置を駆動するフラ
ッシュカメラにおいて、前記電子シャツタ回路または前
記電子閃光装置への前記電源の接続の切換えを行なう電
源スイッチと、前記電子シャツタ回路に対する前記電源
の第１の動作限界電圧または前記電子閃光装置に対する
前記電源の第２の動作限界電圧を検出する電圧検出回路
とを備え、前記電圧検出回路は前記電源に並列接続され
る発光素子と半導体スイッチ素子との直列体と、前記電
源電圧を分割した電圧を前記半導体スイッチ素子の制御
電極に与え前記電源電圧が前記第１の動作限界電圧以上
のときに前記半導体スイッチ素子が導通する分割電圧を
発生する第１の分割抵抗と、前記電源電圧を分割した電
圧を前記半導体スイッチの素子の制御電極に与え前記電
源電圧が前記第２の動作限界電圧以上のときに前記半導
体スイッチ素子が導通する分割電圧を発生する第２の分
割抵抗と、前記電源が前記電子シャツタ回路に接続され
ている時に前記第１の分割抵抗を前記電源に接続し、前
記電源が前記電子閃光装置に接続されている時に前記第
２の分割抵抗を前記電源に接続するように前記電源スイ
ッチに連動して前記第１の分割抵抗または前記第２の分
割抵抗を前記電源に切替接続するスイッチとからなり、
前記電子シャツタ回路または前記電子閃光装置へ前記電
源を供給時にも前記電源電圧の検出を可能としたフラッ
シュカメラ。In a flash camera that combines an electronic shutter circuit and an electronic flash device that can automatically control the amount of exposure according to subject brightness, the electronic shutter circuit or the electronic flash device is driven by the same power source. a power switch for switching the connection of the power source to the electronic flash device; and a voltage detector for detecting a first operating limit voltage of the power source for the electronic shutter circuit or a second operating limit voltage of the power source for the electronic flash device. The voltage detection circuit includes a series body of a light emitting element and a semiconductor switch element connected in parallel to the power supply, and a voltage obtained by dividing the power supply voltage to a control electrode of the semiconductor switch element so that the power supply voltage is a first divided resistor that generates a divided voltage that makes the semiconductor switch element conductive when the voltage is equal to or higher than the first operating limit voltage; and a voltage that is obtained by dividing the power supply voltage and applies the divided voltage to the control electrode of the semiconductor switch element. a second divided resistor that generates a divided voltage that makes the semiconductor switch element conductive when the voltage is equal to or higher than the second operating limit voltage; A resistor is connected to the power source, and when the power source is connected to the electronic flash device, the first divided resistor or the second divided resistor is connected to the power source in conjunction with the power switch. a switch for selectively connecting the second divided resistor to the power supply,
A flash camera capable of detecting the power supply voltage even when the power is supplied to the electronic shutter circuit or the electronic flash device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981085756U JPS595855Y2 (en) | 1981-06-11 | 1981-06-11 | flash camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981085756U JPS595855Y2 (en) | 1981-06-11 | 1981-06-11 | flash camera |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5723532U JPS5723532U (en) | 1982-02-06 |
| JPS595855Y2 true JPS595855Y2 (en) | 1984-02-22 |
Family
ID=29448003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1981085756U Expired JPS595855Y2 (en) | 1981-06-11 | 1981-06-11 | flash camera |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS595855Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4832336U (en) * | 1971-08-20 | 1973-04-19 |
-
1981
- 1981-06-11 JP JP1981085756U patent/JPS595855Y2/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4832336U (en) * | 1971-08-20 | 1973-04-19 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5723532U (en) | 1982-02-06 |
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