CN2728103Y

CN2728103Y - Time delay energy-saving switch

Info

Publication number: CN2728103Y
Application number: CN 200420053308
Authority: CN
Inventors: 张静; 张娜; 洪明君
Original assignee: 张静
Priority date: 2004-08-20
Filing date: 2004-08-20
Publication date: 2005-09-21
Anticipated expiration: 2014-08-20

Abstract

The utility model relates to a time delay energy-saving switch, particularly an energy-saving lamp switch. The utility model comprises an alternating current/direct current conversion circuit. A bridge rectifier circuit is used for converting alternating current into direct current to provide power supply for the control circuit. When the control circuit is used for controlling open and closure of the switch, the function of deferring current supply is realized. Particularly, between the positive and the negative poles of the direct current power supply, a timing circuit is formed by connecting a resistance (R1), a switch (K) and a capacitance (C) in series and in proper order. An adjustable resistor (R3), the first switch triode (T1) and the second switch triode (T2) between the nodes of the switch (K) and the capacitance (C) and the silicon control SCR connected with the direct current circuit, so as to realize control to the timing circuit. By directly joining in alternating current and providing an inertia switch which can freely control delaying time and has simple structure and low cost, the beneficial effect is the function that lamp can still provide illumination in a period of time after the switch is closed under some special situations.

Description

The time-delay power down switch

One, technical field:

The utility model relates to a kind of by switch, particularly a kind of energy-conservation light switch.

Two, background technology:

Existing energy-conservation delay switch, the structure more complicated, if one of them or several pipe have been broken, delay switch just can't be worked, and is easy to be out of order, and simultaneously, uses electronic component a lot, cost is higher, is unfavorable for promoting the use of; Existing delay switch generally is not provided with the function that can regulate delay time yet in addition, thereby when ought needing the illumination of long period sometimes, can seem loaded down with trivial details especially.

Three, summary of the invention:

The purpose of this utility model is exactly the above-mentioned defective that exists at prior art, the time-delay power down switch that provides a kind of delay time to regulate.

Its technical scheme is: comprise ac-dc conversion circuit, utilize bridge rectifier that alternating current is become direct current, for control circuit provides power supply; Control circuit when being used for the open and close of control switch, realizes postponing the function of power supply; Especially series resistance (R1), switch (K) and electric capacity (C) are formed timing circuit successively between the both positive and negative polarity of DC power supply; Connect adjustable resistance (R3), first switch triode (T1) and second switch triode (T2) between the controllable silicon SCR that in the node of switch (K) and electric capacity (C) and DC loop, is connected, realize control timing circuit.

Particularly the base stage of first switch triode (T1) connects adjustable resistance (R3), emitter connects the direct current negative pole, collector electrode connects the base stage of second switch triode (T2) by current-limiting resistance (R4), the emitter of second switch triode (T2) connects negative pole, and collector electrode is connected with the negative electrode of controllable silicon SCR.

The beneficial effects of the utility model are by direct incoming transport, and design provides a kind of energy free adjustment delay time, simple in structure, delay switch with low cost, make the people can be under some specific occasions, satisfy people after off switch, lamp also provides the function of illumination a period of time.

Four, description of drawings:

Circuit structure diagram of the present utility model.

Five, embodiment

Further illustrate the utility model below in conjunction with accompanying drawing embodiment, when K switch is closed, by diode D1, D2, the voltage that D3 and D4 constitute behind the bridge full-wave rectifier passes through resistance R, fair to capacitor C, capacitor C powers on voltage rise when the triode T1 conducting saturated voltage, triode T1 is full to be closed, full the closing of T1 ended triode T2, and the T2 current collection is high level very, makes the controllable silicon SCR conducting, constitute a path, electric light W is lighted, and after switch disconnected, the electric charge on the capacitor C was by resistance R 3, triode T1 discharge, along with the discharge T1 of capacitor C is become by making T2 saturated by saturated, the T2 collector potential descends, and the control controllable silicon SCR is ended, and electric light W extinguishes because of the no current path, resistance R 2, R5, R6 is a biasing resistor, resistance R 4 is a current-limiting resistance, changes the resistance of resistance R 3 or the appearance value of capacitor C, changes delay time.

Claims

1, a kind of time-delay power down switch comprises:

Ac-dc conversion circuit utilizes bridge rectifier that alternating current is become direct current, for control circuit provides power supply;

Control circuit when being used for the open and close of control switch, realizes postponing the function of power supply;

It is characterized in that series resistance (R1), switch (K) and electric capacity (C) are formed timing circuit successively between the both positive and negative polarity of DC power supply; Connect adjustable resistance (R3), first switch triode (T1) and second switch triode (T2) between the controllable silicon SCR that in the node of switch (K) and electric capacity (C) and DC loop, is connected, realize control timing circuit.

2, time-delay power down switch according to claim 1, the base stage that it is characterized in that first switch triode (T1) connects adjustable resistance (R3), emitter connects the direct current negative pole, collector electrode connects the base stage of second switch triode (T2) by current-limiting resistance (R4), the emitter of second switch triode (T2) connects negative pole, and collector electrode is connected with the negative electrode of controllable silicon SCR.