CN2144909Y

CN2144909Y - AC and DC dual-purpose flash lamp group

Info

Publication number: CN2144909Y
Application number: CN 92237220
Authority: CN
Inventors: 蔡生
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-12-05
Filing date: 1992-12-05
Publication date: 1993-10-27
Anticipated expiration: 2002-12-05

Abstract

The utility model discloses an AC and DC dual-purpose flash lamp group used for photography creation. A power source self coupling transformer is connected with the AC input end. An oscillator is connected with the DC input end. The coil of the oscillator and the coil of the power source self coupling transformer form another transformer. The utility model is also provided with a triggering control circuit which is composed of a photoelectric coupler, a control switch and controllable silicon. The output end of a voltage dividing circuit, which is connected with the both ends of a charging capacitor in a charging circuit unit, is also connected with a charging indicating circuit. The utility model has the advantages of alternating-current and direct-current dual-purpose and low cost, can be matched with and connected with the original single body light control flash lamp, and can adjust flash index. The AC and DC dual-purpose flash lamp group can ensure that the exposure amount of photographs is also the same, and the triggering is not influenced by environment.

Description

AC and DC dual-purpose flash lamp group

The utility model belongs to camera, particularly a kind of AC/DC photoflash lamp group who is used for photography creation.

At present, the photoflash lamp group who is used for the studio creation, major part is made up of the light-controlled electronic photoflash lamp that uses alternating current, when taking, often need on camera, add a photoflash lamp that is used to trigger in addition, the trigger flashing lamp group thereupon glistening, if use the photoflash lamp of high-grade camera institute adapted to should be low pressure trigger flashing lamp, only to be used for trigger flashing lamp group obviously be uneconomic to Ang Gui device like this, and such photoflash lamp group has certain requirement to indoor light, owing to adopt light-operated mode, every lamp and the distance that triggers light source, angle also has certain requirement, it almost can't with electric light, natural daylight is used, more impossiblely be used for artistic creation outdoor, with regard to every lamp, when using the 220V alternating current, after halfwave rectifier, voltage on the storage capacitor has only that the 330V of 311V and this electric capacity is withstand voltage to differ greatly, fail this electric capacity is made full use of, to the guide number influence greatly, in addition, the operating state of every lamp is by a neon bulb indication, at 290V left and right sides build-up of luminance, and whether the pairing photoflash lamp of this neon bulb is full of electricity have no way of learning, this just causes the photo lithography amount of taking inconsistent, and the operating state of checking in use, every lamp is also very inconvenient; Existing in addition photoflash lamp group all adopts AC power, and this has just limited its scope of application.

The purpose of this utility model provide a kind of simple in structure, cost is low, be easy to carry, and is not affected by environment, can with natural daylight, electric light mating reaction, and can make the AC/DC photoflash lamp group of the exposure basically identical of being taken a picture.

The utility model is achieved in that it has a charging circuit that is made of at least two charging circuit unit and by diode, the circuits for triggering that current-limiting resistance and triggering autotransformer constitute, it is connected to another power supply autotransformer at ac power input end, be connected to oscillator at dc supply input, coil in the said oscillator and this power supply autotransformer coil constitute another transformer, it also has one by rectifying tube, storage capacitor, be connected on the current-limiting resistance at storage capacitor two ends, photoelectrical coupler and control switch, be connected on output and the current-limiting resistance between the silicon controlled control end and the above-mentioned photoelectrical coupler of bleeder circuit, with trigger the trigger control circuit that controllable silicon that autotransformer and AC power negative terminal link constitutes, the power end of said trigger control circuit links to each other with coil two ends in the oscillator with DC power supply respectively by AC-DC conversion switch, to realize AC-DC conversion.

According to above-mentioned AC/DC photoflash lamp group, the two ends of charging capacitor are connected to bleeder circuit respectively in the charging circuit unit, output at bleeder circuit is in series with inverter and light-emitting diode respectively, link by direct current regulation circuit and power supply autotransformer again, constitute charging indication, behind convenient fluorescent tube full charge, pairing lumination of light emitting diode indication.

According to above-mentioned AC/DC photoflash lamp group, it also has a DC charging control circuit that is made of NOR gate, current-limiting resistance and another photoelectrical coupler, the input of said NOR gate links by the output of change over switch and AC power negative terminal and inverter respectively, the output of said photoelectrical coupler is connected between the control end and power supply negative terminal of oscillator, when using direct current, behind the lamp group full charge, make oscillator stop swinging, thereby save direct current energy.

That advantage of the present utility model is is simple in structure, be easy to carry and cost low, but and AC/DC, when can be used for having a power failure and in outdoor creation, when using alternating current, can make it work in line voltage or raise 5%, thereby adjusted guide number, and had AC power output, can connect the light-operated photoflash lamp of original monomer; When using direct current, can save direct current energy, owing to adopt the operating state of every lamp of luminous tube indication, thereby the exposure basically identical of the photo that assurance is taken, in addition, this photoflash lamp group's triggering is that camera shutter directly triggers and adopts photoelectricity coupling low pressure triggering mode, thereby not affected by environment, can be used with natural daylight, electric light and safe and reliable.

The drawing explanation:

Fig. 1 is circuit theory diagrams of the present utility model;

As shown in drawings, the utility model has one by diode D1, linked switch K31, and lamp body (charging capacitor C1, fluorescent tube DL) charging circuit (can adopt 2 or 3 unit 1) that the charging circuit unit of forming 1 constitutes, the power end 7 of said charging circuit links with ac power input end 1 by current-limiting resistance R1 and lead and the AC-DC conversion switch K21 back that links respectively, it also has one by diode D2, storage capacitor C2, trigger the circuits for triggering that autotransformer L1 constitutes, this circuit is drawn trigger end by linked switch K32, between ac power input end 1 and power end 8, also be connected to power supply autotransformer L2, the tap 6 of said autotransformer L2 links to each other with ac power input end 2 by boost conversion K switch 1 with power end 8, this photoflash lamp group also has one by triode T3, capacitor C 7, resistance R 10 and coil L3, the oscillator that L4 constitutes, said coil L3, the coil of L4 and power supply autotransformer L2 also constitutes transformer, it also has one by rectifier diode D5, storage capacitor C6, be connected on the current-limiting resistance R8 at capacitor C 6 two ends, photoelectrical coupler T1, trigger switch K and current-limiting resistance R9, and be connected on by capacitor C 4 and C3, photoelectrical coupler T1 between the output 9 of the dividing potential drop branch road that resistance R 5 and R6 constitute and the control end 10 of controllable silicon SCR, resistance R 7 and the trigger control circuit of forming with the controllable silicon SCR that autotransformer L1 and power supply negative terminal 8 link, the two ends of the capacitor C 1 in charging circuit unit 1 are connected to another dividing potential drop branch road that is made of resistance R 2 and potentiometer R3 respectively, at the output 11 of this dividing potential drop branch road with by by diode D4, be serially connected with inverter ic 1 and light-emitting diode D3 respectively between the tap 6 of the autotransformer L2 that the direct current regulation circuit that capacitor C 5 and pressurizer IC3 constitute is drawn, constitute charging indication, it also has one by NOR gate IC2, the DC charging control circuit that current-limiting resistance R11 and another photoelectrical coupler T2 constitute, the input of said NOR gate IC2 links by the output and the power end 8 of linked switch K33 and inverter ic 1 respectively, and the output of said photoelectrical coupler T2 is connected between the control end 5 and DC power supply negative terminal 4 of oscillator.

When reality is used, this photoflash lamp group's trigger switch K is camera shutter, when (1) adopting alternating current, linked switch K21 and K22 are removed to exchanging shelves, and the K3(K31 that closes a switch, K32 and K33), begin capacitor C 1 charging, when voltage reaches set point on the capacitor C 1, connect charging indication, the luminous indication of luminous tube D3 of corresponding every lamp, after pressing camera shutter, the voltage at capacitor C 6 two ends makes photoelectrical coupler T1 conducting, connects trigger control circuit, the controllable silicon SCR conducting, connect circuits for triggering again, make the fluorescent tube flash of light; (2) if adopt direct current, AC-DC conversion switch K21 and K22 are removed to zero frequency span, oscillator starting oscillation then, make power supply autotransformer coil L2 induce voltage, make the charging circuit conducting, and then connect charging indication, the luminous indication of luminous tube D3, press shutter again, make trigger control circuit and circuits for triggering conducting again, make the fluorescent tube flash of light.In above-mentioned charging process, behind capacitor C 1 full charge, make inverter ic 1 output low level, make NOR gate IC2 output high level again, make photoelectrical coupler T2 conducting, and then make the blocking of oscillator, thereby save direct current energy.

Claims

1, a kind of AC/DC photoflash lamp group who is used for photography creation, comprise a charging circuit that constitutes by the charging circuit unit and by diode, the circuits for triggering that current-limiting resistance and triggering autotransformer constitute, it is characterized in that, between this photoflash lamp group's ac power input end 1 and 2, be connected to a power supply autotransformer L2, on dc supply input 3 and 4, be connected to oscillator, coil L4 in the said oscillator and power supply autotransformer L2 coil constitute another transformer, it also has one by rectifying tube D5, storage capacitor C6, be connected on the current-limiting resistance R8 and the R9 at storage capacitor C6 two ends, photoelectrical coupler T1 and trigger switch K, be connected on resistance R 7 and above-mentioned photoelectrical coupler T1 between the control end 10 of the output 9 of the bleeder circuit of forming by capacitor C 4 and C3 and resistance R 5 and R6 and controllable silicon SCR, with trigger the trigger control circuit that controllable silicon SCR that autotransformer L1 and AC power negative terminal 8 link constitutes, the power end of said trigger control circuit by AC-DC conversion switch K22 respectively with DC power supply two ends 3,4 link to each other with coil L4 two ends in the oscillator.

2, AC/DC photoflash lamp group according to claim 1, it is characterized in that, the two ends of charging capacitor C1 are connected to the bleeder circuit of being made up of resistance R 2 and R3 respectively in charging circuit unit 1, be in series with inverter ic 1 and light-emitting diode D3 on the output 11 of this bleeder circuit, link by the direct current regulation circuit formed by diode D4, capacitor C 5 and pressurizer IC3 and the tap 6 of power supply autotransformer L2 again, constitute charging indication.

3, AC/DC photoflash lamp group according to claim 1 and 2, it is characterized in that, it also has a DC charging control circuit that is made of NOR gate IC2, current-limiting resistance R11 and another photoelectrical coupler T2, the input of said NOR gate IC2 links by the output of linked switch K33 and AC power negative terminal 8 and inverter ic 1 respectively, and the output of said photoelectrical coupler T2 is connected between the control end 5 and power supply negative terminal 4 of oscillator.

4, AC/DC photoflash lamp group according to claim 1 and 2 is characterized in that, described ac power input end 2 links to each other with tap 6 with the tail end 8 of autotransformer L2 by boost conversion K switch 1.

5, AC/DC photoflash lamp group according to claim 3 is characterized in that, described ac power input end 2 links to each other with tap 6 with the tail end 8 of autotransformer L2 by boost conversion K switch 1.