CN2235173Y - Touch delay dimming switch - Google Patents

Abstract

The utility model relates to a touch delay dimming switch, belonging to the technical field of a household small electric appliance. The circuit of the utility model is composed of a full-wave rectifying circuit, a gyrator circuit, and a control circuit composed of three transistors and one capacitor, and an overvoltage protective device is provided. The utility model realizes the function that the time delay lighting time is controlled by the length of the touching time by a hand. The utility model is free from the interference of the outside body resistance, having overvoltage automatic protection, and having the advantages of sensitivity, electricity saving, high safety and convenient operation. The utility model is suitable for the night illumination of the corridors of buildings, the accesses of stair channels, and other similar places.

Description

Touch time-delay is flush type switch gradually

A kind of touch time-delay is flush type switch gradually, belongs to family expenses small electric apparatus field.

Corridor, stair road junction at building are provided with illuminating lamp, for electrical energy saving, accomplish to turn off the light when you leave, use touch time-delay gradually flush type switch be best choice, time-delay in the prior art is the circuit of flush type switch gradually, the use relay or the transformer that have, volume is bigger, shorter service time because of heating, the circuit that has is to go to touch transistor turns by human body sensing, but not accurate enough sensitivity, power consumption is big, sometimes circuit uses integrated package and high-power silicon controlled rectifier, the circuit complexity, and the circuit that also has is easy to generate spark and uses safety inadequately.

The purpose of this utility model provides gradually flush type switch of a kind of touch time-delay that has improved, and overcomes above-mentioned shortcoming, makes its volume little, little power consumption, and the long then illumination time-delay of touch time is long, and the time-delay of throwing light at least of touch time is short, and safety precautions is arranged.

Used technical scheme is to use by three transistor V1, V2, V3, a capacitor C, a thyristor, the circuit that a voltage stabilizing didoe, a light-emitting diode and five crystal diodes, some resistance and incandescent lamps etc. are formed.The base stage of V2 links to each other with the emitter of V1, and the base stage of V3 links to each other with the collector electrode of V2, V1 and V2, and V2 and V3 all adopt direct coupling system.

Capacitor C is connected between the emitter and ground of V1.

The collector electrode of V3 is connecting the gate pole of thyristor.

Voltage stabilizing crystal diode and light-emitting diode all are connected between the collector electrode and ground of V1.

It is three parts that entire circuit is divided into, and is full-wave bridge rectifier circuit successively, and thyristor circuit (be used for controlling electric light and power supply and constitute path) and the control circuit of being made up of three transistors and electric capacity (are used for controlling the current potential of gate circuit transistor gate.)

Common emitter circuit is adopted in the input and output loop of V1.

Common emitter circuit is adopted in the input and output loop of V2,

Common emitter circuit is adopted in the input and output loop of V3,

On the power connection line, be provided with over-pressure safety device zho.

The touch time-delay that the utility model provides is flush type switch gradually; realized the function that the time-delay lighting hours is decided by staff soft-touch control time length; can not be subjected to the interference of extraneous human body resistance size and all can start; and the overvoltage automatic protection functions is arranged; and not polarity of two alternating current wires is all used in the load input and output, has sensitivity, power saving, safety, advantage such as easy to install.

Accompanying drawing is circuit theory diagrams of the present utility model.

Respectively form the electrical equipment original paper symbol that original paper has all adopted national Specification among the figure, this specification is explanation no longer one by one.

Now narrate its operation principle.

When staff touches the M point, power supply is given electric current of base stage of transistor V1 by the induced current of staff, make the V1 conducting, after the V1 conducting, electric current flows out to capacitor C from V1 and charges, the current potential at C two ends will slowly raise, when height arrived certain value, triode V2 was with conducting, and the collector potential of V2 will be low by hypermutation, thereby V3 is ended, V3 is conducting before the V2 conducting always, and after the V2 conducting, V3 is become by conducting and ends, so the collector potential of V3 is by the low height that becomes, this high potential is added in the silicon controlled gate pole, thereby makes controllable silicon become conducting by ending, after the controllable silicon conducting, to make electric light Z and power supply constitute path, thereby electric light is lighted.After staff left the M point, V1 was become by conducting and ends, and at this moment capacitor C is discharged by V2, after the electricity on the capacitor C has all been put, V2 is become by conducting and ends, so the collector potential of V2 becomes height by low, thereby makes V3 by by becoming conducting, after the V3 conducting, the V3 collector potential is low by hypermutation, thereby is added in reverse voltage of controllable silicon gate pole, controllable silicon is become by conducting end, thereby make electric light Z and power supply not constitute path, electric light is extinguished.Because capacitor C charging and discharge will take a moment, so the electric light time-delay is extinguished.

Claims (1)

1. touch time-delay flush type switch gradually, it is characterized in that: form in the original paper at it, comprise three transistor V1, V2, V3, a capacitor C, a thyristor, a voltage stabilizing didoe, a light-emitting diode, five crystal diodes and resistance, incandescent lamp etc., the base stage of V2 links to each other with the emitter of V1, the base stage of V3 links to each other with the collector electrode of V2, V1 and V2, and V2 and V3 all adopt direct coupling system.

Capacitor C is connected between the emitter and ground of V1,

The collector electrode of V3 is connecting the gate pole of thyristor,

Voltage stabilizing crystal diode and light-emitting diode all are connected between the collector electrode and ground of V1,

Entire circuit and to be divided into be three parts is a full-wave bridge rectifier circuit from power connection successively, thyristor circuit and by three transistors and the control circuit that electric capacity can be formed,

Common emitter circuit is adopted in the input and output loop of V1,

Common emitter circuit is adopted in the input and output loop of V2,

Common emitter circuit is adopted in the input and output loop of V3,

On the power connection line, be provided with overvoltage protection zhO.