CN201369472Y - Grounding conduction state detection device for plug or socket - Google Patents

Abstract

The utility model relates to a ground connection on-state detection device of plug or socket, live wire, zero line and ground wire in including plug or socket ontology and the access this body are connected with an pilot lamp between this live wire and the ground wire. The detection function of the grounding conduction state is realized by connecting an indicator lamp between a live wire and a ground wire, the lamp is on, namely the grounding of a power supply circuit is normal, and the lamp is not on, namely the grounding is abnormal or is not grounded. Therefore, the detection function of the grounding conduction state can be realized by using one indicator lamp, and the device has the characteristics of simple structure, low cost, economy and practicality, and can be widely applied to the detection of the grounding conduction states of various plugs or sockets.

Description

Ground continuity detection device for plug or socket

technical field

The utility model relates to the field technology of grounding detection devices, in particular to a simple-structured, economical and practical grounding conduction state detection device for plugs or sockets.

Background technique

At present, household appliances and office appliances have been popularized in various fields of daily life, such as refrigerators, washing machines, televisions, video recorders, rice cookers, electric water heaters, computers, printers, etc., which have become indispensable in people's work and life. Powerful tool.

According to relevant national regulations, all electrical appliances with a metal casing must use single-phase three-wire AC power plugs and sockets. These AC power plugs or sockets are usually equipped with live wires, neutral wires and ground wires. The ground wire is part of the leakage protection device of the electrical appliance. It does not constitute an electrical circuit. Under normal circumstances, no current flows through it. One end of it is connected to the metal shell of the electrical appliance, and the other end is grounded. Generally, the grounding end should be more than 1m deep into the ground. Connect the metal casing of the appliance to earth. When an electrical appliance breaks down, the power supply may break down or destroy some components, making the casing of the appliance electrified. At this time, the electromotive force of the casing can be guided into the ground by the ground wire, preventing people from getting an electric shock due to accidental contact with the casing of the appliance, and achieving the effect of leakage protection.

However, people tend to ignore the function of the grounding wire. Although some plugs or sockets are provided with a grounding wire, the grounding wire is not properly grounded at all, which is useless. This is a serious safety hazard for people and electrical appliances. .

Utility model content

In view of this, the utility model aims at the shortcomings of the prior art, and its main purpose is to provide a simple-structured, economical and practical device for detecting the grounding conduction state of a plug or socket.

In order to achieve the above object, the utility model adopts the following technical solutions:

A detection device for the grounding continuity state of a plug or socket, including live wires, neutral wires and ground wires inserted into the body of the plug or socket, and a device for detecting the grounding conduction of the ground wires is connected between the live wires and the ground wires. Status indicator light.

As a preferred solution, the indicator light is a neon lamp or an LED lamp, and a voltage dividing resistor is further connected between the neon lamp or the LED lamp and the live wire.

After the utility model adopts the above technical scheme, its beneficial effect is that the detection function of the grounding conduction state is realized by connecting an indicator light between the live wire and the ground wire. When the light is on, the power supply circuit is grounded normally; or no ground. Thereby, the detection function of the grounding conduction state can be realized by using one indicator light, which has the characteristics of simple structure, low cost, economical and practical, and can be widely applied to the detection of the grounding conduction state of various plugs or sockets.

The utility model is described in detail below in conjunction with accompanying drawing and specific embodiment:

Description of drawings

Fig. 1 is the schematic circuit diagram of the embodiment of the utility model;

Fig. 2 is the top view of the plug in the embodiment of the utility model;

FIG. 3 is a side perspective view of FIG. 2 .

Detailed ways:

Please refer to Figures 1 to 3, which show the specific structure of a preferred embodiment of the present invention, including a plug body 10 and live wire L, neutral wire N and ground wire G inserted into the body 10, In particular, an indicator light 20 is connected between the live wire L and the ground wire G, and the indicator light 20 is used to detect and indicate whether the power supply circuit is normally grounded. The live wire L, the indicator light 20, the ground wire G and the earth form a complete ground continuity detection loop. When the ground wire G is connected to the earth normally, a current flows through the ground continuity detection loop, and the indicator light 20 uses this current to emit light. and when the ground line G is not normally connected to the earth, the ground conduction state detection loop is disconnected, no current passes through the loop, and the indicator light 20 does not emit light.

Wherein, when the indicator light 20 adopts neon lamps and LED lamps, a voltage dividing resistor R needs to be connected between the neon lamps, LEDs and the live line L to ensure the voltage required by the neon lamps and LED lamps to emit light normally.

Certainly, the plug body 10 in the foregoing embodiments is not limited to the plug structure shown in the figure, and is also suitable for any other plugs or sockets with live wires, neutral wires and ground wires, without limitation.

The key point of the design of the utility model is to realize the detection function of the grounding conduction state by connecting an indicator light between the live wire and the ground wire. When the light is on, the power supply circuit is normally grounded; Thereby, the detection function of the grounding conduction state can be realized by using one indicator light, which has the characteristics of simple structure, low cost, economical and practical, and can be widely applied to the detection of the grounding conduction state of various plugs or sockets.

The above are only preferred embodiments of the present utility model, and do not limit the technical scope of the present utility model, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present utility model , all still belong to the scope of the technical solution of the utility model.

Claims (2)

1, the earth-continuity condition checkout gear of a kind of plug or socket is characterized in that: include the live wire, zero line and the ground wire that insert in plug or the jack body, and be connected with an indicator light that is used to detect ground wire grounded conducting state between this live wire and ground wire.

2, the earth-continuity condition checkout gear of plug according to claim 1 or socket is characterized in that: described indicator light is neon lamp or LED lamp, further is connected with a divider resistance between this neon lamp or LED lamp and the live wire.

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