CN200969524Y

CN200969524Y - Charger

Info

Publication number: CN200969524Y
Application number: CN 200620136110
Authority: CN
Inventors: 杨志刚; 王望球
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-11-01
Filing date: 2006-11-01
Publication date: 2007-10-31
Anticipated expiration: 2016-11-01

Abstract

A charging device comprises a steady voltage circuit IC1, a transferring switch K, a current-limiting resistance R1, R2, a led LED and a charging switch J1. The character of the charging device is that the charging switch J1 is a ordinary open touching spot of a relay J. The anode of a direct current power is serially connected with a capacitor C by a button switch A and then connected with the ground. The base of a triode Q1 is connected with a connection spot between the button switch A and the capacitor C. The collector of the triode Q1 is connected with the anode of the direct current power and the emitter of the triode Q1 is connected with the ground through the transferring switch K2 and a timing resistance R4 or R5. At the same time the emitter of the triode Q1 is connected with an inputting end of a time-base circuit IC2 and the inputting end of the time-base circuit IC2 is connected with the base of the triode Q2 through a resistance R3. The emitter of the triode Q2 is connected with the anode of the power and the collector of the triode Q2 is connected with the ground through the relay J. the transferring switch K is linked with the transferring switch K2.

Description

A kind of charging device

Technical field the utility model relates to a kind of charging device.

Background technology is present, and commercially available charger has multiple.But generally all do not have timing device and timing function, must remember Chu's charging interval during use, will cause unless you give your whole attention to it and overcharge, make troubles to the user.The content the purpose of this utility model of invention is that a kind of timing function that has will be provided, and need not remember the charging interval during use, stops automatically charging and charging device simple in structure, that cost is low after charging is finished.

The technical solution of the utility model is: this charging device comprises voltage stabilizing circuit IC1, change over switch K, current-limiting resistance R1, R2, LED and charge switch J1, and its characteristics are that charge switch J1 is the normally opened contact of relay J; The positive pole of DC power supply is ground connection behind push-button switch A, series capacitor C, the base stage of triode Q1 connects the contact between push-button switch A and the capacitor C, the collector electrode of triode Q1 connects the positive pole of power supply, the emitter of triode Q1 is through change over switch K2, again through timing resistor R4 or R5 ground connection, the emitter of triode Q1 connects the input of time-base circuit IC2 simultaneously, the output of time-base circuit IC2 connects the base stage of triode Q2 through resistance R 3, triode Q2 emitter connect the positive pole of power supply, the collector electrode of triode Q2 ground connection after relay J; The cathode power supply of time-base circuit IC2 inserts the positive pole of termination power, the negative power supply incoming end ground connection of time-base circuit IC2; Change over switch K and change over switch K2 interlock.

Advantage of the present utility model and effect are: at first, the utility model has been realized the regularly function of charging.Secondly, because charging current switch and timing switch interlock, so have the function that the automatic realization large current charge time is short, low current charge is long.Once more, the utility model is simple in structure, with low cost.At last, provide a kind of simple and practical charging device for little educational herdsman.

Description of drawings

Accompanying drawing is the utility model structural representation.

Embodiment

As shown in the figure, during charging, press the button switch A, triode Q1 conducting, capacitor C is through power source charges, and time-base circuit IC2 (555) exports a low level, and triode Q2 conducting, the coil adhesive of relay J make its normally opened contact J1 closure; At this moment, from the electric current of DC power supply output behind voltage stabilizing circuit IC1 (7805 integrated package of pressure-stabilizing or with the identical integrated package of other functions), again through change over switch K, current-limiting resistance R1 or R2, be battery charge behind charge switch J1 again.Along with the continuous reduction of capacitor C both end voltage, when the capacitor C both end voltage was reduced to the following voltage of 0.7V, triode Q1 ended, time-base circuit 555 outputs one high level, and triode Q2 ends, the relay J outage, J1 disconnects, and charging finishes.Select resistance R 2 or R2 by adjusting change over switch K, just can select different charging currents.The charging timing is that the time constant by capacitor C and timing resistor R4, R5 decides.Because so change over switch K and change over switch K2 interlock are when having selected charging current also just to select the charging timing.

Claims

1, a kind of charging device comprises voltage stabilizing circuit (IC1), change over switch (K), current-limiting resistance (R1), (R2), light-emitting diode (LED) and charge switch (J1), it is characterized in that charge switch (J1) is the normally opened contact of relay (J); The positive pole of DC power supply is through push-button switch (A), series capacitor (C) back ground connection, the base stage of triode (Q1) connects the contact between push-button switch (A) and the capacitor (C), the collector electrode of triode (Q1) connects the positive pole of power supply, the emitter of triode (Q1) is through change over switch (K2), again through timing resistor (R4) or (R5) ground connection, the emitter of triode (Q1) connects the input of time-base circuit (IC2) simultaneously, the output of time-base circuit (IC2) connects the base stage of triode (Q2) through resistance (R3), the emitter of triode (Q2) connects the positive pole of power supply, and the collector electrode of triode (Q2) is ground connection behind relay (J); The cathode power supply of time-base circuit (IC2) inserts the positive pole of termination power, the negative power supply incoming end ground connection of time-base circuit (IC2); Change over switch (K) and change over switch (K2) interlock.