CN2136478Y

CN2136478Y - Multifunctional electroscope

Info

Publication number: CN2136478Y
Application number: CN 92227414
Authority: CN
Inventors: 陈缵光
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-07-09
Filing date: 1992-07-09
Publication date: 1993-06-16
Anticipated expiration: 2002-07-09

Abstract

The utility model relates to a multifunctional electroscope. The two light emitting diodes of a dichromatic light emitting diode are respectively connected with a shunt resistor in parallel and then respectively connected with a dropping current-limiting resistor to form two electroscopes. One electroscope is connected between a phase line contact of a three-wire plug and an earth line contact, and the other electroscope is connected between a zero line contact and the earth line contact. The utility model is used to detect if the earth line of a power socket earths well, if the phase line and the zero line are toned to the wrong position and if the power socket has electricity. The utility model has the advantages of novel structure, multiple function, simple circuit and low cost.

Description

Multifunctional electroscope

The utility model relates to a kind of electroscopic device.

The electroscope of Shi Yonging can only be checked that object is whether charged and judge and distinguish phase line and zero line whether ground connection is good but can not check ground wire easily for a long time.A kind of earth detector appears recently, be the earth connection point of three pin plug be connected in series an electroscope of forming by neon bulb and resistance mutually between the wire terminal and form.If make phase line and zero line on the socket transfer wrong position for some reason, then this earth detector can't correctly be judged.

The purpose of this utility model provides a kind of like this electroscopic device, and it can check whether supply socket has electricity, and whether the ground wire whether good and phase line of ground connection and zero line transfers wrong position.

The utility model is achieved in that behind each bypass resistance in parallel on two light emitting diodes of a dichromatic LED, the step-down current-limiting resistance of connecting respectively again constitutes two electroscopes, two electroscopes are connected on respectively between the phase wire terminal and earth connection point on the three pin plug again, and between zero phase joint and the earth connection point.

Be further described below in conjunction with accompanying drawing.

Fig. 1 is an electrical schematic diagram of the present utility model.

Fig. 2 is an appearance assumption diagram of the present utility model.

In the circuit diagram shown in Figure 1, D ₁And D ₂Be the light emitting diode of two different colours (as red, green), both are integrated to be commercially available dichromatic LED.D ₁With bypass resistance R ₁Back in parallel and step-down current-limiting resistance R ₃Connect an electroscope, in the phase wire terminal (L) that these electroscope two ends are connected to three pin plug respectively and the earth connection point (E).Equally, D ₂With R ₂And R ₄Constitute another electroscope, its two ends are connected to respectively in zero line joint (N) and the earth connection point (E).The used three pin plug of the utility model is made by China's national standard or relevant state standard-required, and plug table lid (1) has an aperture (2), as the position of dichromatic LED, as shown in Figure 2.

During use, the utility model is inserted in the power supply three-plug connector.(1) if ground wire grounded good, and phase line and zero line connection are correct, then D ₁The electric current that passes through is obviously than D ₂Greatly, thus this moment two-colour tube send D ₁The light of color; (2) if ground wire grounded good, and that phase line and zero line wiring are transferred is wrong, then D at this moment ₂The electric current that passes through is obviously than D ₁Greatly, this moment, two-colour tube sent D ₂The light of color; (3) when ground wire imperfect earth, no matter whether phase line and zero line connection be wrong, as long as electricity is arranged, because bypass resistance R ₁And R ₂Existence, make D ₁And D ₂All have less current to pass through, this moment two-colour tube send more weak, D ₁And D ₂The light of two-tone color mixture.

The utility model is not limited to make pure electroscope.The auxiliary indication unit on other electrical equipment can be made according to actual needs, for example the attaching plug of electrical equipment structure of the present utility model can be made.

Characteristics of the present utility model are its novel structure, and function is many, and circuit is simple, and cost is more cheap, thereby are widely used.

Claims

1, a kind of multi-functional electroscope is made up of three pin plug, dichromatic LED and resistance, it is characterized in that a light emitting diode (D of dichromatic LED ₁) and a bypass resistance (R ₁) back in parallel and a step-down current-limiting resistance (R ₃) series connection formation one electroscope, and these electroscope two ends are connected to respectively in the phase wire terminal (L) and earth connection point (E) of three pin plug; Another light emitting diode D of dichromatic LED ₂With a bypass resistance R ₂A back in parallel and a step-down current-limiting resistance R ₄Series connection constitutes another electroscope, again with in this galvanoscopic two zero line joint (N) that terminates at plug and the earth connection point (E); The plug table is stamped an aperture, as the position of dichromatic LED.