CN217508264U - Electric leakage protection circuit of plug - Google Patents
Electric leakage protection circuit of plug Download PDFInfo
- Publication number
- CN217508264U CN217508264U CN202221612090.6U CN202221612090U CN217508264U CN 217508264 U CN217508264 U CN 217508264U CN 202221612090 U CN202221612090 U CN 202221612090U CN 217508264 U CN217508264 U CN 217508264U
- Authority
- CN
- China
- Prior art keywords
- circuit
- protection branch
- plug
- protection
- diode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model provides a leakage protection circuit of plug belongs to plug technical field. It has solved the problem that the contact appears easily when current plug is in the plug. The earth leakage protection circuit of this plug includes the zero line circuit of being connected with participating in, live wire circuit and ground wire circuit, still including the protection branch road one of connection between live wire circuit and ground wire circuit, connect protection branch road two and protection branch road three between live wire circuit and zero line circuit, and connect protection branch road four between zero line circuit and ground wire circuit, protection branch road one, protection branch road two, protection branch road three and protection branch road four all include the resistance that connects gradually, diode and load, the one end of each resistance corresponds and connects live wire circuit and zero line circuit, the other end of each resistance corresponds the positive pole of connecting the diode, the negative pole of each diode is connected with the one end of load, the other end of each load corresponds respectively and connects zero line circuit, live wire circuit and ground wire circuit. The utility model discloses can improve the security of plug.
Description
Technical Field
The utility model belongs to the technical field of the plug, a earth leakage protection circuit of plug is related to.
Background
A power plug refers to a device for connecting an appliance such as an electric appliance to a power source. At present, the metal of the power plug of selling on the market is participated in and is all exposed completely, can not realize keeping apart user's hand and metal when using completely, when plug power plug, because socket electrode contact is electrified all the time, just make the plug at the in-process of extracting or inserting, it also can be electrified to participate in on the plug, and participate in do not insert the socket completely or expose when extracting the socket completely at the plug, user's finger is very easy direct or indirect touch does not insert the participate in part in the socket, cause the electric shock accident. Particularly, as water is a conductive medium, the plug is easy to leak electricity when being used by wet hands, and potential safety hazards are caused.
Disclosure of Invention
The utility model aims at the above-mentioned problem that prior art exists, provide an earth leakage protection circuit of plug, its technical problem that solves is: how to improve the safety of plug insertion and extraction.
The purpose of the utility model can be realized by the following technical proposal: the leakage protection circuit of the plug comprises a zero line circuit, a live line circuit and a ground line circuit which are connected with pins, and further comprises a first protection branch circuit connected between the live line circuit and the ground line circuit, a second protection branch circuit connected between the live line circuit and the zero line circuit and used for flowing from a live line to a zero line, a third protection branch circuit connected between the live line circuit and the zero line circuit and used for flowing from the zero line to the live line, and a fourth protection branch circuit connected between the zero line circuit and the ground line circuit, wherein the first protection branch circuit, the second protection branch circuit, the third protection branch circuit and the fourth protection branch circuit respectively comprise resistors, diodes and loads used for playing a circuit current limiting role, one ends of the resistors are correspondingly connected with the live line and the zero line circuit, the other ends of the resistors are correspondingly connected with anodes of the diodes, the cathodes of the diodes are connected with one ends of the loads, and the other ends of the loads are correspondingly connected with the zero line circuit and the ground line circuit respectively, A hot line and a ground line.
When the leakage protection circuit of the plug is used, one path of the alternating current live wire passes through two protection branch circuits to the zero line, the other path of the alternating current live wire passes through one protection branch circuit to the ground wire, the zero line of the alternating current passes through three protection branch circuits to the live wire, the other path of the alternating current live wire passes through four protection branch circuits to the ground wire, the four protection branch circuits comprise resistors, diodes and loads, the resistors are used for playing a role in limiting current, the diodes are used for rectifying, the loads are used for playing a role in limiting current, each protection branch circuit is enabled to have stable current, the design is realized, no matter how the plug is plugged, the four circuits always have mutually balanced current to pass through, the circuit forms a current difference, people can not have the electric shock feeling when touching the alternating current live wire carelessly, and the plugging safety of the plug is improved.
In the leakage protection circuit of the plug, the load is a light emitting diode. When the load adopts emitting diode, can also play the effect of monitoring each protection branch road operating condition, when emitting diode is not bright in which way, can know which protection branch road has appeared the problem.
In the leakage protection circuit of the plug, the leakage protection circuit further comprises a controller U1 and an alarm connected with the controller U1, pin 2 of the controller U1 is connected with a diode in the first protection branch, pin 3 of the controller U1 is connected with a diode in the second protection branch, pin 7 of the controller U1 is connected with a diode in the third protection branch, pin 5 of the controller U1 is connected with a diode in the fourth protection branch, and a capacitor C2 is connected between the VDD terminal and the VSS terminal of the controller U1. The controller U1 is connected with protection branch one, protection branch two, protection branch three and protection branch four respectively for the working condition of every way of control, if branch breaks down, can report to the police through the alarm and instruct.
In the leakage protection circuit of the plug, the controller U1 is a single chip microcomputer.
In the leakage protection circuit of the plug, the alarm is a buzzer.
In the leakage protection circuit of the plug, the ground line is connected with a resistor R5 and a capacitor C1, one end of the resistor R5 is connected with the input end of the ground line, the other end of the resistor R5 is connected with one end of the capacitor C1, and the other end of the capacitor C1 is connected with the output end of the ground line. The application of the resistor R5 and the capacitor C1 can play a role of ground wire isolation, so that the circuit work is more stable.
Compared with the prior art, the leakage protection circuit of the plug has the advantages that no matter how the plug is plugged, the balanced currents flow inside the plug, a current difference is formed in the circuit, so that people can not get an electric shock feeling even if touching the plug pins carelessly when plugging the plug, and the use safety of the plug is improved.
Drawings
Fig. 1 is a schematic diagram of the circuit structure of the present invention.
In the figure, 1, a live line; 2. a zero line; 3. a ground line; 4. a first protection branch; 5. a protection branch II; 6. a protection branch circuit III; 7. a protection branch circuit IV; 8. an alarm.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, the leakage protection circuit of the plug includes a zero line 2 connected to the pin, a live line 1, a ground line 3, a controller U1, an alarm 8 connected to a controller U1, a first protection branch 4 connected between the live line 1 and the ground line 3, a second protection branch 5 connected between the live line 1 and the zero line 2 and used for flowing from the live line to the zero line, a third protection branch 6 connected between the zero line and the ground line 3, and a fourth protection branch 7 connected between the zero line 2 and the ground line 3, where the first protection branch 4, the second protection branch 5, the third protection branch 6, and the fourth protection branch 7 each include a resistor, a diode, and a load connected in sequence, and in this example, the load is a light emitting diode. Specifically, the first protection branch 4 comprises a resistor R1, a diode D1 and a light emitting diode LED1, one end of the resistor R1 is connected with the live wire line 1, the other end of the resistor R1 is connected with the anode of a diode D1, the cathode of a diode D1 is connected with the anode of a light emitting diode LED1, and the cathode of the light emitting diode LED1 is connected with the input end of the ground wire line 3; the second protection branch 5 comprises a resistor R2, a diode D2 and a light-emitting diode LED2, one end of the resistor R2 is connected with the live wire line 1, the other end of the resistor R2 is connected with the anode of a diode D2, the cathode of a diode D2 is connected with the anode of a light-emitting diode LED2, and the cathode of the light-emitting diode LED2 is connected with the neutral wire line 2; the protection branch circuit III 6 comprises a resistor R3, a diode D3 and a light-emitting diode LED3, one end of the resistor R3 is connected with the zero line circuit 2, the other end of the resistor R3 is connected with the anode of a diode D3, the cathode of a diode D3 is connected with the anode of a light-emitting diode LED3, and the cathode of the light-emitting diode LED3 is connected with the live line circuit 1; the protection branch circuit four 7 comprises a resistor R4, a diode D4 and a light-emitting diode LED4, one end of the resistor R4 is connected with the zero line 2, the other end of the resistor R4 is connected with the anode of a diode D4, the cathode of a diode D4 is connected with the anode of a light-emitting diode LED4, and the cathode of the light-emitting diode LED4 is connected with the input end of the ground line 3; the input end of the ground line 3 is also connected in series with a resistor R5 and a capacitor C1, and the connected capacitor C1 is connected with the output end of the ground line 3. A pin 2 of the controller U1 is connected with a diode D1 in the first protection branch 4, a pin 3 of the controller U1 is connected with a diode D2 in the second protection branch 5, a pin 7 of the controller U1 is connected with a diode D3 in the third protection branch 6, a pin 5 of the controller U1 is connected with a diode D4 in the fourth protection branch 7, a capacitor C2 is connected between a VDD end and a VSS end of the controller U1, and a VDD end of the controller U1 is connected with the live wire 1.
In this embodiment, the controller U1 is a single chip microcomputer. The alarm 8 can adopt a buzzer.
When the plug with the leakage protection circuit is used, one path of an alternating current live wire is from a live wire line 1 to a ground wire through a resistor R1, a diode D1 and a light emitting diode LED1, the other path of the alternating current live wire is from a resistor R2, a diode D2 and a light emitting diode LED2 to a zero wire line 2, one path of an alternating current zero wire is from the zero wire line 2 to the live wire line 1 through a resistor R3, a diode D3 and a light emitting diode LED3, and the other path of the alternating current live wire is from the resistor R4, a diode D4 and a light emitting diode LED4 to the ground wire.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (6)
1. A leakage protection circuit of a plug comprises a zero line circuit (2), a live line circuit (1) and a ground line circuit (3) which are connected with pins, and is characterized by further comprising a first protection branch (4) connected between the live line circuit (1) and the ground line circuit (3), a second protection branch (5) connected between the live line circuit (1) and the zero line circuit (2) and used for flowing from a live line to a zero line, a third protection branch (6) connected between the zero line circuit (2) and the ground line (3), and a fourth protection branch (7) connected between the zero line circuit (2) and the ground line (3), wherein the first protection branch (4), the second protection branch (5), the third protection branch (6) and the fourth protection branch (7) respectively comprise resistors, diodes and loads used for playing a circuit role, one ends of the resistors are correspondingly connected with the live line circuit (1) and the zero line circuit (2), the other end of each resistor is correspondingly connected with the anode of a diode, the cathode of each diode is connected with one end of a load, and the other end of each load is correspondingly connected with a zero line circuit (2), a live line circuit (1) and a ground line circuit (3).
2. The earth leakage protection circuit of a plug of claim 1, wherein said load is a light emitting diode.
3. The leakage protection circuit of the plug according to claim 1 or 2, further comprising a controller U1 and an alarm (8) connected with the controller U1, wherein pin 2 of the controller U1 is connected with the diode in the first protection branch (4), pin 3 of the controller U1 is connected with the diode in the second protection branch (5), pin 7 of the controller U1 is connected with the diode in the third protection branch (6), pin 5 of the controller U1 is connected with the diode in the fourth protection branch (7), and a capacitor C2 is connected between the VDD terminal and the VSS terminal of the controller U1.
4. The plug leakage protection circuit of claim 3, wherein said controller U1 is a single chip microcomputer.
5. A leakage protection circuit for a plug according to claim 3, characterised in that said alarm (8) is a buzzer.
6. The leakage protection circuit of plug according to claim 1, wherein a resistor R5 and a capacitor C1 are connected in said ground line (3), one end of said resistor R5 is connected to the input end of ground, the other end of resistor R5 is connected to one end of capacitor C1, and the other end of said capacitor C1 is connected to the output end of ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221612090.6U CN217508264U (en) | 2022-06-23 | 2022-06-23 | Electric leakage protection circuit of plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221612090.6U CN217508264U (en) | 2022-06-23 | 2022-06-23 | Electric leakage protection circuit of plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217508264U true CN217508264U (en) | 2022-09-27 |
Family
ID=83338924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221612090.6U Active CN217508264U (en) | 2022-06-23 | 2022-06-23 | Electric leakage protection circuit of plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217508264U (en) |
-
2022
- 2022-06-23 CN CN202221612090.6U patent/CN217508264U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN217508264U (en) | Electric leakage protection circuit of plug | |
| CN207662993U (en) | A kind of detection device of feeder ear wiring condition, conduction charging system and electric vehicle | |
| CN104422839A (en) | Ethernet power supply function test circuit and tool | |
| CN207559200U (en) | A kind of USB switching switches | |
| CN2409659Y (en) | Electrical safety experiment case for single-phase three-hole planar electrode socket and electric leakage protector | |
| CN203385776U (en) | Single-phase electric energy meter capable of recognizing electricity theft through reverse connection of live and neutral wires and neutral wire cutting-off | |
| CN108519535A (en) | A kind of detection method of single-phase three-wire formula wall socket ground wire, zero curve and phase line | |
| CN107968643A (en) | A kind of DC load singly-bound touch control on-off circuit | |
| CN202421457U (en) | Motor over-current detection circuit | |
| CN208862296U (en) | A kind of insertion seat board | |
| CN202949098U (en) | Universal alternating current/direct current plug with lamp within wide voltage range | |
| CN208461444U (en) | The leakage protection circuit of household electrical appliance | |
| CN207528809U (en) | A kind of non-isolated Switching Power Supply zero cross detection circuit | |
| CN205265967U (en) | Touch lighting circuit of double key | |
| CN105116200A (en) | Detection circuit compatible with switching value and level amount | |
| CN209400594U (en) | A kind of time switch structure with function displaying voltage | |
| CN204925225U (en) | Detection circuitry of compatible switching value and level volume | |
| CN204966871U (en) | Safe socket with earthleakage protective equipment | |
| CN103336157A (en) | Single-phase electric energy meter capable of identifying electricity stealing of reverse neutral and fire wire connection and neutral wire disconnection | |
| CN203951174U (en) | A kind of lithium battery protection board circuit based on 0 Europe resistive element | |
| CN212627133U (en) | Portable double-wire leakage protection device | |
| CN211377089U (en) | Five-hole socket with voltmeter | |
| CN209596406U (en) | Electrode control circuit and electrode slice | |
| CN207490228U (en) | Power outlet superpressure indicating circuit | |
| CN217062732U (en) | Remote control's wireless socket |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |