JPS6028745U

JPS6028745U - Electronic flash device for camera

Info

Publication number: JPS6028745U
Application number: JP11966983U
Authority: JP
Inventors: 井川　一夫; 渡辺　公
Original assignee: キヤノン株式会社
Priority date: 1983-07-30
Filing date: 1983-07-30
Publication date: 1985-02-26

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は従来の電子閃光装普を示す回路図、第２図は従
来の電源補助スイッチの一例を示す断面図、第３図は本
考案の一実施例を示す回路である。１・・・電池、３・・・発振トランジスタ、５・・・発
振トランス、７・・・高圧整流ダイオード、訃・・主キ
ャパシタ、９・・・電源主スィッチ、９　ａｓ　　９　
ｂ、９　ｃ・・・電極、９ｓ・・・接片、１０・・・電
源補助スイッチ、１０ａ、１０ｃ・・・電極、１４・・
・ネオランプ、１５・・・抵抗、１６・・・ダイオード
、２６・・・露出制御回路、Ａ、Ｂ−・・ライン、ａ、
ａ’　、ｂ、ｂ’　、ｃ、ｃ’・・・信号端子、■・・
・昇圧回路、Ｓ・・・二次巻線。FIG. 1 is a circuit diagram showing a conventional electronic flash device, FIG. 2 is a sectional view showing an example of a conventional power supply auxiliary switch, and FIG. 3 is a circuit showing an embodiment of the present invention. 1...Battery, 3...Oscillation transistor, 5...Oscillation transformer, 7...High voltage rectifier diode, 2...Main capacitor, 9...Power supply main switch, 9 as 9
b, 9 c...electrode, 9s...contact piece, 10...power supply auxiliary switch, 10a, 10c...electrode, 14...
- Neo lamp, 15...Resistor, 16...Diode, 26...Exposure control circuit, A, B-...Line, a,
a', b, b', c, c'...signal terminal, ■...
・Boost circuit, S...secondary winding.

Claims

[Scope of utility model registration request]

In a closed circuit that includes a battery as a power source, a secondary winding of an oscillation transformer in a booster circuit that oscillates and boosts the power supply voltage, a high-voltage rectifier diode that rectifies the secondary voltage of the oscillation transformer, and a main capacitor, Insert an auxiliary power switch that is turned on when attached to the main power supply inch and camera, and a signal terminal connected to the negative electrode of the main capacitor via a circuit element.
A signal terminal connected to one electrode of the auxiliary power switch is provided, and an electrode that comes into contact with the contact piece when the main power switch is turned off is attached to the main power switch, and the electrode is connected to the high voltage side terminal of the charging completion indicator light. In the connected camera electronic flash device, connect the power supply auxiliary switch in series with the power supply main switch so that it is located on the side farther from the negative electrode of the battery than the power supply main switch, and connect the power supply auxiliary switch connected to the signal terminal. The electrode is connected to the negative electrode of the main capacitor, and - a unidirectional semiconductor element is connected in parallel to the auxiliary power switch so that the forward direction corresponds to the direction of shorting the charging completion indicator light. Electronic flash device for cameras.