JPH0239223U - - Google Patents
Info
- Publication number
- JPH0239223U JPH0239223U JP11771088U JP11771088U JPH0239223U JP H0239223 U JPH0239223 U JP H0239223U JP 11771088 U JP11771088 U JP 11771088U JP 11771088 U JP11771088 U JP 11771088U JP H0239223 U JPH0239223 U JP H0239223U
- Authority
- JP
- Japan
- Prior art keywords
- converter
- battery
- oscillation
- primary winding
- oscillation transformer
- 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
Landscapes
- Stroboscope Apparatuses (AREA)
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
- Dc-Dc Converters (AREA)
Description
第１図は本考案を適用したカメラ用電子閃光装
置の電気回路図、第２図は第１図示の主コンデン
サの充電特性図、第３図は第１図示電池から流れ
る出力電流の特性図、第４図は他の実施例に係る
電子閃光装置の電気回路図、第５図は従来の電子
閃光装置の回路図である。
１は電池、２は発振トランジスタ、７，９は発
振トランス、２４はインピーダンス切換用スイツ
チである。
Fig. 1 is an electric circuit diagram of an electronic flash device for cameras to which the present invention is applied, Fig. 2 is a charging characteristic diagram of the main capacitor shown in Fig. 1, Fig. 3 is a characteristic diagram of the output current flowing from the battery shown in Fig. 1, FIG. 4 is an electric circuit diagram of an electronic flash device according to another embodiment, and FIG. 5 is a circuit diagram of a conventional electronic flash device. 1 is a battery, 2 is an oscillation transistor, 7 and 9 are oscillation transformers, and 24 is an impedance switching switch.
Claims (1)
し、二次側に接続された低インピーダンス素子に
電気エネルギーを供給するＤＣ―ＤＣコンバータ
において、前記素子への給電開始後で、かつ給電
終了前の所定時期に前記一次側インピーダンスを
高インピーダンスから低インピーダンスに切り換
える手段を設けたことを特徴とするＤＣ―ＤＣコ
ンバータ。 (2) 発振トランジスタと、該トランジスタを介
して電池から給電される発振トランスとを有し、
該発振トランスの二次巻線出力により主コンデン
サを充電するＤＣ―ＤＣコンバータにおいて、前
記発振トランスの一次巻線と前記電池との直列回
路に直列接続される第２の一次巻線と、前記主コ
ンデンサの充電開始後で、かつ充電完了までの間
の所定時期に前記第２の一次巻線を短絡する手段
とを設けたことを特徴とするＤＣ―ＤＣコンバー
タ。 (3) 前記請求項(1)記載のＤＣ―ＤＣコンバータ
を具備することを特徴とする電子閃光装置。 (4) 前記発振トランジスタは前記電池と前記発
振トランスの一次巻線との間に接続されることを
特徴とする請求項(3)記載の電子閃光装置。[Claims for Utility Model Registration] (1) A DC-DC converter that converts the output voltage of a battery connected to the primary side and supplies electrical energy to a low impedance element connected to the secondary side. A DC-DC converter comprising means for switching the primary side impedance from high impedance to low impedance at a predetermined time after the start of power supply and before the end of power supply. (2) It has an oscillation transistor and an oscillation transformer that is supplied with power from a battery via the transistor,
In a DC-DC converter that charges a main capacitor by a secondary winding output of the oscillation transformer, a second primary winding connected in series with a series circuit of the primary winding of the oscillation transformer and the battery, A DC-DC converter comprising means for short-circuiting the second primary winding at a predetermined time after the start of charging of the capacitor and until the end of charging. (3) An electronic flash device comprising the DC-DC converter according to claim (1). (4) The electronic flash device according to claim (3), wherein the oscillation transistor is connected between the battery and the primary winding of the oscillation transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11771088U JPH0239223U (en) | 1988-09-06 | 1988-09-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11771088U JPH0239223U (en) | 1988-09-06 | 1988-09-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0239223U true JPH0239223U (en) | 1990-03-15 |
Family
ID=31361406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11771088U Pending JPH0239223U (en) | 1988-09-06 | 1988-09-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0239223U (en) |
-
1988
- 1988-09-06 JP JP11771088U patent/JPH0239223U/ja active Pending
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