CN2230484Y

CN2230484Y - Electronic touch-type switch

Info

Publication number: CN2230484Y
Application number: CN 94237774
Authority: CN
Inventors: 陈启义
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-07-18
Filing date: 1994-07-18
Publication date: 1996-07-03
Anticipated expiration: 2004-07-18

Abstract

The utility model relates to a power switch, particularly an electronic touch-type switch. The electronic touch-type switch is characterized in that a bridge rectifier is adopted to provide 2V working voltage; a switch-on working circuit which is composed of triodes BG1, BG2, a diode of a controllable silicon SCR, resistors R1, R2, a capacitance C1 and a metal sheet K1 is utilized to realize switching on the diode SCR of the controllable silicon, so as to cause lighting fixtures to brighten; besides, a resistor R5 is connected in series between the collecting electrode of the BG2 and the base electrode of the BG1 to keep the diode SCR of the controllable silicon switching on all the time. At the same time, the collecting electrode of the BG2 is connected in parallel with an unlocking discharging circuit which is composed of a triode BG3, a diode D1, a resistor R7 and a metal sheet K2 to realize the stopping of the diode SCR of the controllable silicon, so as to cause lighting fixtures to extinguish.

Description

The electronic touch switch

The utility model relates to a kind of mains switch, refers in particular to the electronic touch switch that is used on the lighting.

At present, the electronic touch switch that uses on the lighting generally adopts a plurality of integrated packages and peripheral cell to form, and provides operating voltage by bridge rectifier, the circuit complexity, and connector lug is many, and the cost height is not susceptible to user acceptance.

The purpose of this utility model provide a kind of simple, valency is low, be used for the electronic touch switch on the lighting.

The scheme that realizes above-mentioned purpose is: be connected on the controllable silicon diode in the electric power loop of light fixture by bridge rectifier, conducting by the controllable silicon diode and end and control light fixture and open and close like this, principle according to the controllable silicon diode, as long as control the voltage that utmost point adds a variation, just can realize at it., the control utmost point of this controllable silicon diode is connected with an operating circuit of being made up of two triodes, electric capacity, resistance, sheet metals that opens, civil power is put forward the operating voltage from 2V through bridge rectifier for this reason.When touching this sheet metal with hand, because of human body sensing makes a triode conducting, the electric capacity charging, another triode ends, cause the controllable silicon diode current flow, lighting is shinny, in order to make the work of turn-on transistor normally, electric capacity keeps charging normal, and resistance of polyphone plays the feedback auto-lock function between the transistor base of transistor collector that ends and conducting, the triode of remain off ends all the time, the conducting all the time of the triode of conducting, thus the conducting all the time of controllable silicon diode caused, and lighting continues shinny.In addition, discharge circuit of forming by triode, diode, resistance, sheet metal of unblanking in parallel on the transistor collector that in opening operating circuit, ends, when touching this sheet metal with hand, because of human body sensing causes the triode conducting, diode is conducting also, opens the transistor collector high potential that ends in the operating circuit and is discharged, and the controllable silicon diode ends, lighting extinguishes, and reaches to close purpose.

The electronic touch switch that adopts this programme to obtain, easy for installation, highly sensitive, dependable performance, cost be low, can adapt to users.

Embodiment of the present utility model now is described in detail in detail in conjunction with the accompanying drawings.

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

According to accompanying drawing, this switch comprises bridge rectifier, opens operating circuit, the discharge circuit of unblanking, and latching circuit four parts are formed.Civil power is by lighting L, enter bridge rectifier D, obtain A, the 2V operating voltage of B end, when hand touches the sheet metal K1 that opens in the operating circuit, because of human body sensing passes through resistance R 1, advance to put triode BG1 base stage, make it conducting, capacitor C 1 is recharged, it is 0.3V by the R3 step-down that the conducting of triode BG1 makes its collector voltage, and close with the direct lotus root of the base stage of triode BG2, triode BG2 base voltage ends because of corresponding decline, triode BG2 collector potential is raised to 1.8V by original 0.5V, controllable silicon diode SCR obtains behind the 1.8V and conducting, lighting L is shinny, in order to make triode BG1 keep conducting, capacitor C 1 normally discharges and recharges, triode BG2 remain off, controllable silicon diode SCR conducting, the feedback resistance R5 that connects between triode BG2 collector electrode and triode BG1 base stage forms latching circuit, makes triode BG2 collector voltage 1.8V reduce to 0.5V by resistance R 5 and supplies with triode BG1 base stage, keep triode BG1 conducting all the time and entire circuit operate as normal, lighting is shinny all the time.Unblank discharge circuit by triode BG3, diode D1, resistance R 7, sheet metal K2 forms, this circuit is attempted by on the triode BG2 collector electrode, when touching sheet metal K2 with hand, because of human body sensing makes triode BG3 conducting by resistance R 7, also conducting of diode D1, triode BG2 collector electrode high potential 1.8V is discharged, and controllable silicon diode SCR ends, and lighting L extinguishes, light-emitting diode D2 is bright, reaches to touch the purpose of closing.

Claims

A kind of mains switch, refer in particular to the electronic touch switch on the lighting, utilize a bridge rectifier D that 2V is provided operating voltage, feature of the present utility model is: controllable silicon diode SCR is clever in the electric power loop of light fixture L by bridge rectifier D string, the control utmost point of controllable silicon diode SCR can be by triode BG1, BG2, resistance R 1, R2, capacitor C 1, the operating circuit that opens that sheet metal K1 forms provides operating circuit to connect, form latching circuits in adopting of the triode BG2 resistance R 5 of connecting between electrode and the triode BG1 base stage, triode BG2 adopt on the electrode in parallel one by triode BG3, resistance R 7, diode D1, the discharge circuit of unblanking that sheet metal K2 forms.