CN2114267U

CN2114267U - Flash lamp

Info

Publication number: CN2114267U
Application number: CN 92203431
Authority: CN
Inventors: 周双; 吴岩; 韩廷强
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-03-04
Filing date: 1992-03-04
Publication date: 1992-08-26

Abstract

The utility model relates to a flash lamp which comprises shell body, a bottom board and an electronic circuit. The electronic circuit comprises a voltage boosting rectification circuit, an indicating circuit and a triggering circuit, wherein, the voltage boosting rectification circuit comprises a battery, a transistor, capacitance, a resistor, a transformer and a rectification tube. The secondary output terminal of the transformer is connected with the rectification tube in series, the output of the rectification tube is connected with the triggering circuit and a charge discharge capacitor, and the other end of the capacitor is a communal grounding terminal for three circuits. When the utility model is adopted, the voltage of the grounding point and the battery terminal is not more than 6V, so the safety is realized, and the electric shock hazard is not caused. The electronic circuit of the utility model is suitable for the transistors of different model numbers and the flash lamps of different types.

Description

Flash lamp

The utility model belongs to the photograph light fixture.

Existing photoflash lamp is varied, they are made up of housing, base plate and electronic circuit, the minus earth (see figure 1) of the charge and discharge capacitance device of these electronic circuits, when people contact battery cathode (being capacitor anode), because of the contact voltage be high pressure, dangerous, therefore be necessary to study a kind of safe photoflash lamp.

The utility model purpose provides a kind of photoflash lamp, this photoflash lamp better performances, and circuit is safe to operating personnel.

For achieving the above object, the utility model adopts following structure, it comprises: housing, base plate and electronic circuit, described electronic circuit comprises boost rectifying circuit, indicating circuit and circuits for triggering, boost rectifying circuit comprises: battery, triode, electric capacity, resistance, transformer, rectifying tube, transformer secondary output output serial connection rectifying tube, rectifying tube output connecting triggering circuit and charge and discharge capacitance device, the capacitor other end are the public earth terminal of three circuit.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 has the photoflash lamp internal circuit

A kind of safety-type photoflash lamp of Fig. 2 internal circuit

A kind of safety-type photoflash lamp of Fig. 3 internal circuit

A kind of safety-type photoflash lamp of Fig. 4 internal circuit

Fig. 5 photoflash lamp outline drawing

Among Fig. 1, the termination battery cathode of capacitor C2, and the other end ground connection of capacitor, when the people contacted battery cathode, what be subjected to was high-tension electricity, very dangerous.

Triode V, C among Fig. 2 ₁, R1, transformer B1, D1 constituted boost rectifying circuit, R ₂Q forms indicating circuit, and R3, C3, B2 and K switch constitute circuits for triggering, and wherein transformer secondary output meets rectifying tube D1, and the rectifying tube output connecting triggering circuit reaches and meets charge and discharge capacitance device C by D2 ₄, the other end of capacitor C4 is the public earth terminal of three circuit.

After the photoflash lamp energized, the V conducting obtains ac high-voltage after B1 boosts, behind D1, C2 rectifying and wave-filtering, obtain high direct voltage, charge to C4 through D2, finish by the transfer process of dc low-voltage, charge to C3 through R3 simultaneously, when K is closed to high direct voltage, the elementary formation LC vibration of C3 and B2, the high pressure that the B2 secondary induction goes out nearly volts up to ten thousand is added on the flash tube, makes gas ionization in the flash tube, the flash tube conducting, C4 makes flash tube send strong flash of light through the flash tube discharge, finishes flash function.

R2Q plays the charging indicative function, when charging reaches required value, and the luminous indication of Q.

Adorn a D2 in the circuit, purpose is to stop C4 by circuit discharging, thereby the energy of C4 is preserved, and has saved electric energy, because electric capacity has part energy, when using next time, can accelerate charging rate greatly, shorten the charging interval, bring convenience, prolonged battery useful life again to use.

In the circuit behind the rectifier diode D1 can and on C2, strobe.

Among Fig. 3, Fig. 4 each component symbol identical with Fig. 2, be that employed triode is different, the connection of its public earth terminal is different and connect voluntarily according to triode.The applicable different photoflash lamps of these circuit.

Fig. 5 is the photoflash lamp outline drawing, and 1 is housing among the figure, 2 batteries, 3 charge and discharge capacitances, 4 base plates, 5 nuts, 6 contacts.

The utility model has the advantages that: because the flash lamp internal circuit adopts public earth terminal, make that the voltage of earth terminal and battery-end is the highest can not to surpass 6V, safe and reliable, can not cause Danger Electric shock risk, this circuit is applicable to the triode of different model, is suitable for multi-form flash lamp, and this flash lamp is except safety, performance is better, power saving.

Claims

1, a kind of photoflash lamp is characterized in that it comprises: housing, base plate and electronic circuit, described electronic circuit comprises boost rectifying circuit.Indicating circuit, circuits for triggering, wherein boost rectifying circuit comprises: battery, triode, electric capacity, resistance, transformer, rectifying tube, transformer secondary output output serial connection rectifying tube, rectifying tube output connecting triggering circuit and charge and discharge capacitance device, the other end of capacitor are the public earth terminal of three circuit.

2, by the described photoflash lamp of claim 1, it is characterized in that described rectifying tube output connecting triggering circuit and connect the charge and discharge capacitance device by diode D2, and on rectification circuit and connect a capacitor.