CN2443578Y

CN2443578Y - Searchlight

Info

Publication number: CN2443578Y
Application number: CN 00258826
Authority: CN
Inventors: 梁标富
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-09-28
Filing date: 2000-09-28
Publication date: 2001-08-15
Anticipated expiration: 2010-09-28

Abstract

The utility model relates to a circuit of a searchlight. A light touch switching control circuit composed of a resistor R2, a capacitor C3, a light touch switch S1 and an integrated circuit U1, an over-charging over-discharging protection circuit composed of diodes (D3, D4, D2), triodes (BG1, BG2, BG3), a voltage stabilizing tube D1 and resistors (R8, R5, R6, R11, R, R9, R10), and a pulse width light-modulating mode composed of resistors (R3, R7, R4), capacitors (C5, C6, C4), an oscillator U2 and a diode D5 can jointly prolong the service life of products. The utility model solves the problem that the existing searchlight has large power loss, low light-modulating efficiency, and no over-discharging and over-charging protection.

Description

Searchlight

The utility model belongs to the chargeable searchlight of hand-hold type, particularly its circuit diagram.

General searchlight should throw light at a distance, and light is eager to excel, and also wants low light level illumination for a long time continuously.And in the prior art, be to adopt the high-power above-mentioned functions that realizes, but powerful searchlight is when realizing dimming function, be to adopt resistance or diode step-down to realize, light fixture will produce power loss on these voltage drop elements when work, light modulation efficient is low, and voltage drop element damages easily; Above-mentioned light fixture adopts mechanical switch control; because the power of bulb is big; the electric current that flows through switch contact is very big; so in use the contact of switch is easy to damage; because the circuit over that simply do not overcharge, the user will make light fixture overcharge or over-discharge can in use slightly because of carelessness, the very fast reduction of light fixture internal battery usefulness again; even lost efficacy, do not ensure the useful life of light fixture.

The purpose of this utility model is to design long searchlight in a kind of useful life.

The positive pole of battery G1 and lamp L1 join in the utility model, and the collector electrode of the other end of lamp L1 and power tube BG4 joins, and the negative pole of the emitter of power tube BG4 and battery G1 joins; Touch-switch S1 be connected between the positive pole and negative pole of battery G1 after resistance R 2 is connected, touch-switch S1 is also in parallel with capacitor C 3, touch-switch S1 links to each other with clock control end 14 pin of integrated circuit U1 with contact between the resistance R 2, also be connected between the positive pole and negative pole of battery G1 behind the integrated circuit U1 series resistor R1, the contact between integrated circuit U1 and the resistance R 1 is connected with the capacitor C 1 of earth connection; The control end Q2 of integrated circuit U1 is connected with the anode of diode D5, is connected in series by resistance R 4 between the base stage of the negative electrode of diode D5 and power tube BG4; The control end Q1 of integrated circuit U1 links to each other with oscillator U2, oscillator U2 joins with the negative pole of battery G1 again, resistance R 3, resistance R 7, oscillating capacitance C5 series connection, be connected between the negative pole of control end Q1 and battery G1, resistance R 3 is connected with oscillator U2 respectively with the contact of oscillating capacitance C5 with resistance R 7 with contact between the resistance R 7, be connected anti-self-excitation capacitance C6 between the negative pole of oscillator U2 and battery G1, be connected capacitor C 4 between the negative electrode of oscillator U2 and diode D5; The control end Q1 of integrated circuit U1 is connected with the anode of diode D3 and the anode of diode D4 respectively with control end Q2, the negative electrode of the negative electrode of diode D3 and diode D4 links to each other and joins with resistance R 8, the base stage of resistance R 8 other ends and triode BG3 is joined, link to each other with the base stage of triode BG2 again after the collector series connection resistance R 5 of triode BG3, the negative pole of the emitter of triode BG3 and battery G1 joins, the positive pole of the emitter of triode BG2 and battery G1 joins, resistance R 6, voltage-stabiliser tube D1, resistance R 11 series connections are between the negative pole of the collector electrode of triode BG2 and battery G1, voltage-stabiliser tube D1 is connected with the base stage of triode BG1 with the contact of resistance R 11, the collector electrode of triode BG2 is connected with resistance R with the collector electrode of triode BG1, the negative pole of the emitter of triode BG1 and battery G1 joins, the collector electrode of triode BG1 is connected with the anode of diode D2 with contact between the resistance R, reset terminal 15 pin of the negative electrode of diode D2 and integrated circuit U1 join, resistance R 10 is connected between the negative pole and reset terminal 15 pin of battery G1, resistance R 9 is connected between the positive pole and reset terminal 15 pin of charging connector M, and reset terminal 15 pin join with control end Q3 by capacitor C 2; The control end Q0 of integrated circuit U1 is unsettled.

The utility model prolongs lamp life by three aspects, and the one, adopt the touch-switch control circuit of forming by resistance R 2, capacitor C 3, touch-switch S1, integrated circuit U1, make operation more reliable; The 2nd, set up the over circuit of forming by diode (D3, D4, D2), triode (BG1, BG2, BG3), voltage-stabiliser tube D1 and resistance (R8, R5, R6, R11, R, R9, R10) that overcharges, make the light fixture internal battery be protected longer service life; The 3rd, adopt the pulsewidth dimming mode of forming by resistance (R3, R7, R4), electric capacity (C5, C6, C4), oscillator U2 and diode D5, light modulation efficient is high and durable.

Fig. 1: the circuit theory diagrams of a kind of embodiment

Be described further below in conjunction with accompanying drawing.

As shown in Figure 1: present embodiment comprises integrated circuit U1, oscillator U2 and bulb L1, battery G1 and charging connector M.

Integrated circuit U1 is the CMOS integrated circuit of little power consumption, can finish touch-switch and logic control, the positive pole of battery G1 and lamp L1 join in the present embodiment, the collector electrode of the other end of lamp L1 and power tube BG4 joins, the negative pole of the emitter of power tube BG4 and battery G1 joins, and the base stage of power tube BG4 links to each other with resistance R 4; Touch-switch S1 be connected between the positive pole and negative pole of battery G1 after resistance R 2 is connected, touch-switch S1 is also in parallel to eliminate the false triggering that switch causes because of contact resistance with capacitor C 3, touch-switch S1 links to each other with clock control end 14 pin of integrated circuit U1 with contact between the resistance R 2, R2 is the pull-up resistor of clock control end 14 pin, also be connected between the positive pole and negative pole of battery G1 behind the integrated circuit U1 series resistor R1, contact between integrated circuit U1 and the resistance R 1 is connected with the capacitor C 1 of earth connection, resistance R 1 and capacitor C 1 are formed the filter circuit of integrated circuit U1, the control end Q2 of integrated circuit U1 is connected with the anode of diode D5, and the negative electrode of diode D5 and resistance R 4 are joined; Press touch-switch S1, clock control end 14 pin of integrated circuit U1 can be received the fluctuating signal that height changes; Control end Q0, the Q1 of integrated circuit U1, Q2, Q3 can export high level successively.Circuit is when quiescent operation, and control end Q0 exports high level, and all the other control end Q1, Q2, Q3 are low level, is in turn-off this moment.

The control end Q1 of integrated circuit U1 links to each other with oscillator U2, oscillator U2 joins with battery G1 negative pole again, resistance R 3, resistance R 7, oscillating capacitance C5 series connection, be connected between control end Q1 and the battery G1 negative pole, resistance R 3 is connected with oscillator U2 respectively with the contact of oscillating capacitance C5 with resistance R 7 with contact between the resistance R 7, be connected anti-self-excitation capacitance C6 between the negative pole of oscillator U2 and battery G1, be connected capacitor C 4 between the negative electrode of oscillator U2 and diode D5; Oscillator U2 finishes vibration and pulse-width regulated by external resistance R 3, resistance R 7 and oscillating capacitance C5, the size of oscillating capacitance C5 influences the frequency of oscillation of oscillator, adjusting resistance R 7 can change the duty ratio of oscillator pulses, and anti-self-excitation capacitance C6 makes the square-wave signal of oscillator U2 outputting standard.

The control end Q1 of integrated circuit U1 is connected with the anode of diode D3 and the anode of diode D4 respectively with control end Q2, the negative electrode of the negative electrode of diode D3 and diode D4 links to each other and joins with resistance R 8, the base stage of resistance R 8 other ends and triode BG3 is joined, link to each other with the base stage of triode BG2 again after the collector series connection resistance R 5 of triode BG3, the negative pole of the emitter of triode BG3 and battery G1 joins, the positive pole of the emitter of triode BG2 and battery G1 joins, resistance R 6, voltage-stabiliser tube D1, resistance R 11 series connections are between the negative pole of the collector electrode of triode BG2 and battery G1, voltage-stabiliser tube D1 is connected with the base stage of triode BG1 with the contact of resistance R 11, the collector electrode of triode BG2 is connected with resistance R with the collector electrode of triode BG1, the negative pole of the emitter of triode BG1 and battery G1 joins, the collector electrode of triode BG1 is connected with the anode of diode D2 with contact between the resistance R, reset terminal 15 pin of the negative electrode of diode D2 and integrated circuit U1 join, resistance R 10 is connected between the negative pole and reset terminal 15 pin of battery G1, R10 is the pull down resistor of reset terminal 15 pin, when the circuit operate as normal, the current potential of reset terminal 15 pin is an electronegative potential; Resistance R 9 is connected between storage battery M positive pole and reset terminal 15 pin, and reset terminal 15 pin join with control end Q3 by capacitor C 2.The control end Q0 of integrated circuit U1 is unsettled.

The present embodiment light modulation is performed such:

Press for the first time touch-switch S1, clock control end 14 pin of integrated circuit U1 are received a fluctuating signal, make control end Q1 output high level, and all the other control ends all become low level, the high level of control end Q1 output makes oscillator U2 get electric work for oscillator U2 provides working power.Regulating resistance R 7, to make oscillator U2 output duty cycle be 50% square-wave signal is added to power tube BG4 through capacitor C 4, resistance R 4 base stage, make power tube BG4 be operated on off state, conducting and time of ending respectively are half in a cycle of oscillation, the average voltage level that bulb L1 two ends obtain is half of battery G1 voltage, and at this moment bulb L1 is operated in low light level mode.

Press for the second time touch-switch S1, the control end Q2 output high level of integrated circuit U1, this high level is added to the base stage of power tube BG4 through diode D5, resistance R 4, makes power tube BG4 saturation conduction, and at this moment bulb L1 is operated in the high light mode.

Press touch-switch S1 for the third time, the control end Q3 output high level of integrated circuit U1, this high level process capacitor C 2 is added to reset terminal 15 pin of integrated circuit U1, and integrated circuit U1 is resetted, and circuit is got back to initial quiescent operation state.

The over circuit is made up of two partial circuits; the battery G1 voltage detecting circuit that a part is made up of voltage-stabiliser tube D1, triode BG1, resistance R, resistance R 6, resistance R 11, another part are that the switching circuit of triode BG2, triode BG3, resistance R 5, resistance R 8, diode D3, diode D4 composition is the voltage detecting circuit power supply.When circuit working during in the low light level or high light mode, the high level of the control end Q1 of integrated circuit U1, control end Q3 output makes its conducting through the base stage that diode D3 or diode D4, resistance R 8 are added to triode BG3 respectively, triode BG2 also is the testing circuit power supply with the work conducting also, when battery G1 is enough electric, the voltage of triode BG2 punctures voltage-stabiliser tube D1 through resistance R 6, triode BG1 conducting and its collector electrode low level, at this moment protective circuit is to the not influence of operate as normal of circuit; When the voltage of battery G1 slowly reduces; when the voltage of triode BG2 output is lower than the voltage stabilizing value of voltage-stabiliser tube D1; voltage-stabiliser tube D1 ends; triode BG1 by and the high level of its collector electrode output is added to reset terminal 15 pin of integrated circuit U1 through diode D2; integrated circuit U1 is resetted; circuit is got back to quiescent operation state (turn-off), thereby plays over.

Resistance R 9 is to turn off the light for charging to establish; in use which kind of mode no matter circuit be operated in as long as connect charger at charging connector M place; the high potential of charger output is added to integrated circuit U1 reset terminal 15 pin through resistance R 9; integrated circuit U1 is resetted; circuit is got back to quiescent operation state (turn-off), thereby realizes additives for overcharge protection.

Claims

1, a kind of searchlight, the positive pole of battery G1 and lamp L1 join, and it is characterized in that: the collector electrode of the other end of lamp L1 and power tube BG4 joins, and the negative pole of the emitter of power tube BG4 and battery G1 joins; Touch-switch S1 be connected between the positive pole and negative pole of battery G1 after resistance R 2 is connected, touch-switch S1 is also in parallel with capacitor C 3, touch-switch S1 links to each other with clock control end 14 pin of integrated circuit U1 with contact between the resistance R 2, also be connected between the positive pole and negative pole of battery G1 behind the integrated circuit U1 series resistor R1, the contact between integrated circuit U1 and the resistance R 1 is connected with the capacitor C 1 of earth connection; The control end Q2 of integrated circuit U1 is connected with the anode of diode D5, is connected in series by resistance R 4 between the base stage of the negative electrode of diode D5 and power tube BG4; The control end Q1 of integrated circuit U1 links to each other with oscillator U2, oscillator U2 joins with the negative pole of battery G1 again, resistance R 3, resistance R 7, oscillating capacitance C5 series connection, be connected between the negative pole of control end Q1 and battery G1, resistance R 3 is connected with oscillator U2 respectively with the contact of oscillating capacitance C5 with resistance R 7 with contact between the resistance R 7, be connected anti-self-excitation capacitance C6 between the negative pole of oscillator U2 and battery G1, be connected capacitor C 4 between the negative electrode of oscillator U2 and diode D5; The control end Q1 of integrated circuit U1 is connected with the anode of diode D3 and the anode of diode D4 respectively with control end Q2, the negative electrode of the negative electrode of diode D3 and diode D4 links to each other and joins with resistance R 8, the base stage of resistance R 8 other ends and triode BG3 is joined, link to each other with the base stage of triode BG2 again after the collector series connection resistance R 5 of triode BG3, the negative pole of the emitter of triode BG3 and battery G1 joins, the positive pole of the emitter of triode BG2 and battery G1 joins, resistance R 6, voltage-stabiliser tube D1, resistance R 11 series connections are between the negative pole of the collector electrode of triode BG2 and battery G1, voltage-stabiliser tube D1 is connected with the base stage of triode BG1 with the contact of resistance R 11, the collector electrode of triode BG2 is connected with resistance R with the collector electrode of triode BG1, the negative pole of the emitter of triode BG1 and battery G1 joins, the collector electrode of triode BG1 is connected with the anode of diode D2 with contact between the resistance R, reset terminal 15 pin of the negative electrode of diode D2 and integrated circuit U1 join, resistance R 10 is connected between the negative pole and reset terminal 15 pin of battery G1, resistance R 9 is connected between the positive pole and reset terminal 15 pin of charging connector M, and reset terminal 15 pin join with control end Q3 by capacitor C 2; The control end Q0 of integrated circuit U1 is unsettled.