CN210723572U

CN210723572U - Leakage protection plug with magnetic ring clip

Info

Publication number: CN210723572U
Application number: CN201922110679.0U
Authority: CN
Inventors: 杨爱国
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-30
Filing date: 2019-11-30
Publication date: 2020-06-09
Anticipated expiration: 2029-11-30

Abstract

The utility model relates to a take earth leakage protection plug of magnetic ring checkpost, including plug body and connecting wire, the plug body includes casing, circuit board and participates in the subassembly, the circuit board is fixed in the casing, participate in the subassembly embedding casing and be connected with the circuit board electricity, the connecting hole has been seted up on the casing, this connecting hole inner wall department is fixed with the magnetic ring checkpost, the connecting wire passes the magnetic ring checkpost and is connected with the circuit board, and this magnetic ring checkpost overcoat is equipped with insulating protective sheath, and this insulating protective sheath one end is connected with the casing, and the insulating protective sheath other end is fixed at the connecting wire outside, can shield external magnetic field through setting up the magnetic ring checkpost, has improved plug interference.

Description

Leakage protection plug with magnetic ring clip

Technical Field

The utility model relates to a plug especially relates to a take earth leakage protection plug of magnetic ring checkpost.

Background

The external magnetic field and the magnetic field of the electric equipment can form an interference magnetic field, the existing plug is simple in structure and does not have an anti-interference function, external electromagnetic waves can enter the plug from a power line joint to cause interference on electronic components inside the plug, normal operation of the equipment is affected, functions of the plug cannot be achieved, and even the equipment is damaged.

SUMMERY OF THE UTILITY MODEL

To the current situation of above-mentioned prior art, the utility model aims to solve the technical problem that a take earth leakage protection plug of magnetic ring checkpost is provided to solve prior art problem.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

the utility model provides a take earth leakage protection plug of magnetic ring checkpost, includes plug body and connecting wire, the plug body includes casing, circuit board and participates in the subassembly, the circuit board is fixed in the casing, it is connected with the circuit board electricity to participate in the subassembly embedding casing, set up the connecting hole on the casing, this connecting hole inner wall department is fixed with the magnetic ring checkpost, the connecting wire passes the magnetic ring checkpost and is connected with the circuit board, and this magnetic ring checkpost overcoat is equipped with insulating protective sheath, and this insulating protective sheath one end is connected with the casing, and the insulating protective sheath other end is fixed outside the connecting wire, can shield external magnetic field through setting up the magnetic.

Preferably, the pin assembly includes a live pin, a neutral pin and a ground pin.

Preferably, the connecting wires comprise a live wire, a neutral wire and a ground wire.

Preferably, the circuit board comprises a board body, an electric leakage protection device, a relay K1 and a relay K2, the electric leakage protection device, the relay K1 and the relay K2 are all embedded on the board body, the input end of the electric leakage protection device is respectively electrically connected with the live wire pin and the zero wire pin, the coil of the relay K1 is connected with the coil of the relay K2 in series, the output end of the electric leakage protection device is respectively electrically connected with the coil of the relay K1 and the coil of the relay K2, the contact end of the relay K1 is respectively electrically connected with the live wire pin and the live wire pin, the contact end of the relay K2 is respectively electrically connected with the zero wire pin and the zero wire, and the electric leakage protection device can detect whether electric leakage occurs in a circuit and control the relay K1 and the relay K2 to be disconnected, so that the electric.

Preferably, an optocoupler U1, a triode Q2, a capacitor C12, a resistor R16 and a relay K3 are further embedded in the board body, the capacitor C12 and the resistor R16 are connected in series, the capacitor C12 is electrically connected with the live pin, the resistor R16 is electrically connected with the ground pin, the emitter output end of the optocoupler U1 is electrically connected with the neutral pin, the emitter input end of the optocoupler U1 is electrically connected with the resistor R16, the receiver input end of the optocoupler U1 is electrically connected with the live pin, the receiver output end of the optocoupler U1 is grounded, the triode Q2C is electrically connected with the live pin, the triode Q2E is electrically connected with the coil input end of the relay K3, the triode Q2B is electrically connected with the receiver output end of the optocoupler U1, the coil output end of the relay K3 is grounded, the relay K3 contact ends are respectively electrically connected with the ground pin and the ground pin, the capacitor C56, the resistor R16 and the U1 are matched to detect whether the optocoupler can use the ground pin for normal detection, the optocoupler U1 indirectly controls the on-off of the relay K3 by controlling the on-off of the triode Q2, if the ground wire cannot be used, the connection between the electrical appliance and the ground wire is disconnected, and the electric shock accident caused by the fact that the shell of the electrical appliance is electrified due to the fact that the ground wire cannot be normally used is avoided.

Compared with the prior art, the utility model has the advantages of:

the interference killing feature of plug has been increased through setting up the magnetic ring checkpost, can avoid external magnetic field to cause the interference to the inside electronic components of plug, make plug even running, the life of plug has been prolonged, make the plug can carry out earth leakage protection to electrical apparatus through setting up earth leakage protection device, the operation of electrical apparatus continuous safety and stability has been guaranteed, through opto-coupler U1, triode Q2, electric capacity C12, mutually supporting between resistance R16 and the relay K3 can judge whether normal use can be to the ground wire, avoided making electrical equipment shell electrified because of the ground wire can not normal use, the emergence of the electric shock accident that leads to, the utility model relates to a rationally, accord with market demand, be fit for promoting.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic circuit diagram of the present invention.

Detailed Description

As shown in fig. 1-2, the plug comprises a plug body and a connecting wire 2, the plug body comprises a casing 1, a circuit board 8 and a pin assembly, the circuit board 8 is fixed in the casing 1, the pin assembly is embedded in the casing 1 and is electrically connected with the circuit board 8, a connecting hole is formed in the casing 1, a magnetic ring clip 4 is fixed on the inner wall of the connecting hole, the connecting wire 2 penetrates through the magnetic ring clip 4 to be connected with the circuit board 8, an insulating protective sleeve 3 is sleeved outside the magnetic ring clip 4, one end of the insulating protective sleeve 3 is connected with the casing 1, the other end of the insulating protective sleeve 3 is fixed outside the connecting wire 2, and the external magnetic field can be shielded by arranging the magnetic ring.

When the earth leakage protection device detects circuit leakage, the earth leakage protection device is disconnected with a coil of a relay K1 and a coil of a relay K2, so that a contact end of a relay K1 is disconnected with a contact end of a relay K2, thereby cutting off the connection between the live wire 7 of the pins and the live wire, the zero wire pin 5 and the zero wire, and achieving the purpose of protecting an electric appliance, when the earth wire can be normally used, a part of current directly flows out from the earth wire through a capacitor C12 and a resistor R16, at this time, the light emitter of the optocoupler U1 is not powered, the light receiver of the optocoupler U1 is not powered, the current flows into the B pole of the triode Q2 from the live wire pin 7, the B pole of the triode Q2 is high level, the C pole and the E pole of the triode Q2 are conducted, the coil end of the relay K3 is powered, the contact end of the relay K3 is closed, the ground wire is conducted with the ground wire pin 6, if the ground wire in the socket cannot be used normally, the current flows into the light emitter of the optocoupler U1 from the capacitor C12 and the resistor R16, the light emitter of the optocoupler U1 starts to emit light, the light receiver of the optocoupler U1 is powered, the current flows into the light receiver from the live wire pin 7 and directly flows out from the light receiver, the B pole of the triode Q2 is low level at this time, the C pole and the E pole of the triode Q2 are not conducted, the coil end of the relay K3 is not powered, the contact of the relay K3 is separated from the ground, the occurrence of electric shock is prevented.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in the embodiments and modifications thereof may be made, and equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a take earth leakage protection plug of magnetic ring checkpost, its characterized in that, includes plug body and connecting wire (2), the plug body includes casing (1), circuit board (8) and participates in the subassembly, circuit board (8) are fixed in casing (1), it is connected with circuit board (8) electricity to participate in the subassembly embedding casing (1), the connecting hole has been seted up on casing (1), and this connecting hole inner wall department is fixed with magnetic ring checkpost (4), connecting wire (2) pass magnetic ring checkpost (4) and are connected with circuit board (8), and this magnetic ring checkpost (4) overcoat is equipped with insulating protective sheath (3), and this insulating protective sheath (3) one end is connected with casing (1), and the insulating protective sheath (3) other end is fixed in connecting wire (2) outside.

2. A earth leakage protection plug with a magnetic ring clip according to claim 1, characterized in that said pin assembly comprises a live pin (7), a neutral pin (5) and a ground pin (6).

3. A earth leakage protection plug with a magnetic ring clip as claimed in claim 2, characterized in that said connection line (2) comprises live, neutral and earth.

4. A leakage protection plug with a magnetic ring clip according to claim 3, wherein said circuit board (8) comprises a board body, a leakage protection device, a relay K1 and a relay K2, said leakage protection device, relay K1 and relay K2 are embedded on the board body, the input terminals of said leakage protection device are electrically connected with the live pin (7) and the neutral pin (5), respectively, the coil of said relay K1 is connected in series with the coil of relay K2, the output terminals of said leakage protection device are electrically connected with the coil of relay K1 and the coil of relay K2, respectively, the contact terminals of said relay K1 are electrically connected with the live pin (7) and the live pin, respectively, and the contact terminals of said relay K2 are electrically connected with the neutral pin (5) and the neutral pin, respectively.

5. A leakage protection plug with a magnetic ring clip as claimed in claim 4, wherein said plate body is further embedded with an optocoupler U1, a transistor Q2, a capacitor C12, a resistor R16 and a relay K3, said capacitor C12 is connected in series with the resistor R16, said capacitor C12 is electrically connected with the live pin (7), said resistor R16 is electrically connected with the ground pin (6), the light emitter output terminal of said optocoupler U1 is electrically connected with the neutral pin (5), the light emitter input terminal of said optocoupler U1 is electrically connected with the resistor R16, the light receiver input terminal of said optocoupler U1 is electrically connected with the live pin (7), the light receiver output terminal of said optocoupler U1 is grounded, the C pole of said transistor Q2 is electrically connected with the live pin (7), the E pole of said transistor Q2 is electrically connected with the coil input terminal of the relay K3, the B pole of said transistor Q2 is electrically connected with the light receiver output terminal of said U1, and the coil output terminal of said relay K3 is grounded, the contact ends of the relay K3 are electrically connected to the ground pin (6) and the ground, respectively.