CN102237614B

CN102237614B - Electricity leakage protection socket

Info

Publication number: CN102237614B
Application number: CN 201010152951
Authority: CN
Inventors: 黄华道
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-04-22
Filing date: 2010-04-22
Publication date: 2013-02-13
Anticipated expiration: 2030-04-22
Also published as: CN102237614A

Abstract

The invention discloses a novel electricity leakage protection socket. The socket is characterized in that: two groups of metal sheets are fixed on left and right two sides lifting arms of a release of a reset / tripout mechanical device in the electricity leakage protection socket; one group of metal sheets is connected with power supply live wires and zero line input metal sheets; another group of the metal sheets is connected with the power supply live wires and a zero line output terminal; every ends of each metal sheet are provided with movable contacts; output conductor metal sheets, which are on left and right two sides of a middle support in the electricity leakage protection socket, are respectively provided with two stationary contacts; the movable contacts and the stationary contacts form a power switch. The invention has the following advantages that: the socket works stably and reliably; usage is safe.

Description

Leakage protection socket

Technical Field

The invention relates to a leakage protection socket.

Background

Currently, a common earth leakage protection socket is disclosed in patent No. 01226819.4; 00233169.1, it is composed of casing, reset button on the surface of casing, test button, differential transformer for detecting fault current, tripping coil with iron core, SCR, control chip, power input metal sheet, power output and reset guide module.

With the continuous development of the electric leakage protection socket industry, the requirements of people on the use safety and the service life of the electric leakage protection socket are higher and higher. This makes industry personnel constantly strive for research, improve earth leakage protection socket, make its function stronger, work safer, reliable.

Disclosure of Invention

In view of the above, it is a primary object of the present invention to provide an improved novel earth leakage protection outlet that is reliable and stable in operation.

Another object of the present invention is to provide an earth leakage protection socket with a forced mechanical trip function. When the service life of the leakage protection socket is ended, the reset button can be forcibly tripped through the mechanical device, and the power output of the leakage protection socket is cut off.

It is another object of the present invention to provide a leakage protection socket with a display function. At least two indicating lamps are arranged in the leakage protection socket to reflect the state of the leakage protection socket, such as before reset button reset, after reset button reset, input end wiring error and the like.

The invention further aims to provide a novel leakage protection socket which is provided with a safety baffle device of 1-shaped and T-shaped power output jacks and has good use safety. The safety baffle device for the power supply jacks can effectively prevent the occurrence of electric shock casualty accidents caused by mistakenly touching electrified bodies in the power supply output jacks of the power supply jacks, and improves the use safety.

In order to achieve the purpose, the invention adopts the following technical scheme: a novel leakage protection socket comprises a shell, a reset button and a test button which are arranged on the shell, a circuit board which is arranged in the shell and can realize the power output or no power output of the leakage protection socket, and at least one pair of output conductive metal sheets which are arranged in the shell, wherein the circuit board is provided with at least one pair of power live wires, zero line input metal sheets, at least one pair of power live wires, a zero line output end and a reset/trip mechanical device; the method is characterized in that:

one ends of the power live wire and zero line input metal sheets are bent downwards by 90 degrees, penetrate through the differential transformer and are welded on the circuit board, are connected with the power live wire and zero line input wiring screws and are connected with the power live wire and zero line in the wall through wires;

the other end of the power supply live wire input metal sheet is connected with one metal sheet through a bus; the other end of the power supply zero line input metal sheet is connected with the other metal sheet through a bus;

the output ends of the live wire and the zero wire of the power supply are welded at the other end of the circuit board and are contacted with the power supply output wiring screw; the output end of the live wire of the power supply is connected with the other metal sheet through a bus; the output end of the power supply zero line is connected with another metal sheet through a bus;

the metal sheet is fixed on the lifting arm at one side of the release; one end of the metal sheet is connected with the power supply live wire input metal sheet through a bus; a moving contact is welded/riveted at the end part of the other end of the metal sheet; a fixed contact is welded/riveted on the output conductive metal sheet arranged on one side of the middle layer bracket of the shell above the movable contact; the moving contact on the metal sheet is vertically corresponding to the fixed contact on the output conductive metal sheet, and the moving contact and the fixed contact are contacted or disconnected to form a power switch;

the other metal sheet is fixed on a lifting arm at one side of the release; one end of the metal sheet is connected with the output end of the power supply live wire through a bus; a moving contact is welded/riveted on the end part of the other end of the metal sheet, a static contact is welded/riveted on an output conductive metal sheet arranged on one side of the middle layer bracket of the shell above the moving contact, and the moving contact on the metal sheet is vertically corresponding to the static contact on the output conductive metal sheet to be contacted or disconnected to form another power switch;

the other metal sheet is fixed on the lifting arm at the other side of the release; one end of the metal sheet is connected with a power supply zero line input metal sheet through a bus; a moving contact is welded/riveted at the end part of the other end of the metal sheet; a fixed contact is welded/riveted on an output conductive metal sheet arranged on one side of the middle layer bracket of the shell above the movable contact; the moving contact on the metal sheet is vertically corresponding to the fixed contact on the output conductive metal sheet, and the moving contact and the fixed contact are contacted or disconnected to form a power switch;

the other metal sheet is fixed on the lifting arm at the other side of the release; one end of the metal sheet is connected with the output end of the power supply zero line through a bus; the other end of the metal sheet is welded/riveted with a moving contact, a fixed contact is welded/riveted on an output conductive metal sheet arranged on one side of the middle layer bracket of the shell above the moving contact, and the moving contact on the metal sheet is vertically corresponding to the fixed contact on the output conductive metal sheet to be contacted or disconnected to form another power switch.

The earth leakage protection socket is also provided with a life-span termination forced mechanical tripping device;

the forced mechanical tripping device is positioned below the test button and comprises a plastic pulling piece, an elastic steel sheet for fixing the plastic pulling piece and a spring; the plastic pulling piece, the elastic steel sheet for fixing the plastic pulling piece and the spring are arranged in the tripping coil framework;

the spring is arranged between the tripping coil framework and the position right below the plastic pulling piece, and the elastic steel sheet is clamped in the groove on the plastic pulling piece to fix the plastic pulling piece in the tripping coil framework;

a hook pin with a slope extends out of one side of the plastic pulling piece, which is close to the release; a mechanical tripping hole is formed on the top surface of the inner lock catch of the leakage protection socket below the hook foot;

pressing the test button downwards to a first position to enable a metal test sheet in the leakage protection socket to be in contact with a conducting sheet connected with a current limiting resistor for simulating leakage current to manually generate simulated leakage current; if the life of the earth leakage protection socket is ended, the reset button cannot be tripped or tripped; continuing to press the test button to a second position; the plastic pulling piece is enabled to move downwards, the spring is compressed, the elastic steel sheet is also compressed and deformed, the hook foot of the plastic pulling piece is inserted into the mechanical tripping hole on the top surface of the lock catch, the lock catch is pulled leftwards along with the insertion of the hook foot, the lock catch hole on the top surface of the lock catch is aligned with the reset guide post, the lock groove at the bottom of the reset guide post jumps out of the lock hole to be separated, the reset button trips/trips, the tripper moves downwards, the movable contact is separated from the fixed contact, and the power output end of the leakage protection socket has no power output.

The power input end circuit board of the earth leakage protection socket, which is connected with the live wire and zero wire input connection screws of the power supply, is respectively welded with a pointed discharge metal sheet which is in a right-angle triangle or isosceles triangle shape, is arranged in the fixed box and is used for discharging, the pointed ends of the two metal sheets are oppositely arranged and keep a certain interval, and the exposed heights of the head parts of the pointed ends of the two metal sheets are the same; the distance between the tops of the two metal sheets is less than half of the distance between the bottoms of the two metal sheets.

The earth leakage protection socket also comprises at least one group of power output jack safety baffle device; the safety baffle device of the power output jack is formed by combining a left slide block, a right slide block, a T-shaped small slide block and 2 springs;

the left sliding block and the right sliding block are arranged in a crossed mode, and the left sliding block, the right sliding block and the T-shaped small sliding block are placed above the live wire and zero wire output jacks of the power supply;

the spring is arranged between the left sliding block and the right sliding block which are arranged in a crossed mode;

when the power plug is not inserted into the earth leakage protection socket, the left sliding block, the right sliding block and the T-shaped small sliding block cover the power live wire and zero wire output conductive plug bush, when the power plug is inserted into the earth leakage protection socket, the left sliding block, the right sliding block and the T-shaped small sliding block move to expose the power live wire and zero wire output conductive plug bush below the left sliding block, the right sliding block and the T-shaped small sliding block under the action of the blades on the power plug, and the power plug is inserted into the power live wire and zero wire output conductive plug bush to output power. When the power plug is pulled out from the earth leakage protection socket, the left sliding block, the right sliding block and the T-shaped small sliding block are restored to the initial positions under the action of the spring, and the power live wire and the zero wire output conductive plug bush below the left sliding block, the right sliding block and the T-shaped small sliding block are covered.

The leakage protection socket also comprises two combined simulation leakage current generation switches which are linked with the reset button simultaneously;

the combined analog leakage current generating switch is arranged below or beside a release in the reset/trip mechanical tripping device; wherein,

a switch for generating analog leakage current comprises a conductive piece and a metal spring piece; the other analog leakage current generating switch consists of a conductive piece and a metal elastic piece;

one end of the conductive piece forming the analog leakage current generating switch is connected with a zero line of a power input end penetrating through the differential transformer through the controlled silicon, and the other end of the conductive piece is suspended below the metal elastic sheet; one end of the metal elastic sheet is suspended above the conductive piece, the other end of the metal elastic sheet is connected with one end of the metal elastic sheet forming another analog leakage current generating switch, and is connected with a zero line of a power input end penetrating through the differential transformer through a current-limiting resistor and a correct power-on indicator lamp, and is also connected with a live wire of the power input end penetrating through the differential transformer through a trip coil, and is also connected with a power input end (6) of the control chip through a rectifier diode and a resistor;

the other end of the metal elastic sheet forming the other analog leakage current generating switch is suspended above one end of the other conductive piece, and the other end of the conductive piece is connected with a zero line of the power supply input end through a current-limiting resistor;

when the reset button is in a tripping state and a resetting state, the 2 combined analog leakage current generation switches are simultaneously in an off state; when the reset button is pressed, the 2 combined analog leakage current generation switches are simultaneously closed to generate analog leakage current, and the analog leakage current generation switches are simultaneously and immediately disconnected at any time.

The earth leakage protection socket also comprises a circuit working switch linked with the reset button; the circuit working switch is composed of two metal sheets; wherein,

one end of the metal sheet is welded on the circuit board and is connected with a live wire which penetrates through the power input end of the differential transformer through a lead via a trip coil, and the other end of the metal sheet is riveted with a contact;

one end of the other metal sheet is suspended above the metal sheet, and a contact is riveted at the end part of the other metal sheet; the other end of the differential transformer is welded on the circuit board and is connected with a zero line passing through the power input end of the differential transformer through a silicon controlled rectifier;

when the reset button is in a tripping state, the circuit working switch is switched off, and the whole leakage detection protection circuit is not electrified; when the reset button is reset, the circuit working switch is closed, and the circuit working switch provides a working power supply for the whole leakage detection protection circuit.

Two indicator lamps are arranged in the leakage protection socket, one indicator lamp is used for correctly electrifying, and the other indicator lamp is used for working; before the reset button is reset, the correct power-on indicator lamp is on; after the reset button is reset, the two indicator lights are both on.

This earth leakage protection socket has the function of preventing the wiring mistake, if installer connects the power cord mistake in the wall on earth leakage protection socket power output, correctly goes up the electric status indicator lamp and does not shine, presses the reset button and can not reset all the time, proves wrong wiring, and only the wiring is correct, correctly goes up the electric status indicator lamp and lights, and the reset button can reset.

The leakage protection socket has three state display functions, wherein the first state display function is a power-on state display function, the second state display function is a normal working state display function, and the third state display function is a wrong reverse wiring display function;

before the reset button is reset correctly, the correct power-on indicator lamp is on, and after the reset button is reset, the working indicator lamp is on; when the reset button is prevented from being reset, the correct power-on indicator lamp is not on, and the wiring error is indicated.

The leakage protection socket is provided with three state switches linked with a reset button; a first analog leakage generation switch, a second circuit working switch and a third power supply main power switch;

when the reset button is in a tripping state, the power supply main power switch, the circuit working switch and the simulation leakage current generation switch are in a disconnection state;

when the reset button is pressed, the power supply main power switch and the circuit working switch are in an off state, and the simulation leakage current generation switch is closed;

after the reset button is reset, the simulation leakage current generation switch is in an off state, and the power supply main power switch and the circuit working switch are in an on state.

The forced mechanical tripping device for the service life termination of the leakage protection socket is characterized in that the top surface of an inner lock catch of the leakage protection socket is provided with at least two mechanical holes, one mechanical tripping hole and one lock catch hole;

the mechanical tripping hole is arranged below the hook foot of the plastic pulling piece in a direct alignment manner; when the reset button is in a tripping state, the lock catch hole and the bottom surface of the reset guide post are in a staggered shape.

The invention has the advantages that: stable and reliable operation and safe use.

Drawings

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

FIG. 2 is a front view of the present invention;

FIG. 3 is a front view of the present invention with the upper cover removed;

FIGS. 4-1 and 4-2 are schematic diagrams of the connection relationship between the power input metal sheet, the power output end and the two pairs of metal sheets according to the present invention;

FIG. 5-1 is a schematic diagram of the positional relationship of the components on the circuit board of the present invention as viewed from the right side;

FIG. 5-2 is a schematic view of the front view position relationship of the components on the circuit board of the present invention;

5-3 are schematic diagrams of the positional relationship of the components on the circuit board of the present invention viewed from the left;

fig. 6 is a schematic perspective exploded view of the reset/trip mechanism of the present invention;

FIG. 7-1 is a partial cross-sectional view B-B of FIG. 3, illustrating the position of the components of the earth leakage protection jack when the reset button is in the trip device and no power is output from the earth leakage protection jack, in an initial state;

fig. 7-2 is a partial sectional view B-B of fig. 3, showing the positional relationship of the components in the earth leakage protection socket when there is no power output from the earth leakage protection socket at the instant the reset button is pressed;

fig. 7-3 is a partial cross-sectional view B-B of fig. 3, illustrating the positional relationship of the components in the earth leakage protection socket when the reset button is reset and the earth leakage protection socket is operating normally with power output;

fig. 8-1 is a partial sectional view of B-B of fig. 3, where the test button is pressed to the first position to contact the metal test strip 46 with the conductive strip 47, the reset button is not released, and the earth leakage protection socket still has power output, which proves that when the life of the earth leakage protection socket is over, the positional relationship between the components in the earth leakage protection socket is schematic;

fig. 8-2 is a partial sectional view of part B-B of fig. 3, illustrating the positional relationship of the components in the earth leakage protection socket when the test button is continuously pressed to the second position to actuate the mechanical trip unit, the reset button is tripped, and the power output of the earth leakage protection socket is cut off;

fig. 9-1 is a partial cross-sectional view of C-C of fig. 3, with the reset button in a tripped state and the earth leakage protection receptacle having no power output, showing the positional relationship of the components within the earth leakage protection receptacle;

fig. 9-2 is a partial cross-sectional view of C-C of fig. 3, illustrating the positional relationship of the components within the earth leakage protection socket when the reset button is pressed and the earth leakage protection socket has no power output;

fig. 9-3 is a partial cross-sectional view of C-C of fig. 3, illustrating the positional relationship of various components within the earth leakage protection socket when the reset button is reset and the earth leakage protection socket has a power output;

fig. 10 is a specific circuit diagram of the leakage detection protection circuit incorporated in the present invention.

Detailed Description

As shown in fig. 1, the novel earth leakage protection socket disclosed by the invention mainly comprises a housing and a circuit board 18 which is installed in the housing and can realize the power output/non-power output of the earth leakage protection socket.

The shell is formed by combining an upper cover 2, an insulating middle layer bracket 3 and a base 4; a metal grounding installation plate 1 is arranged between the upper cover 2 and the insulating middle layer bracket 3; a circuit board 18 is mounted between the insulating middle layer support 3 and the base 4.

As shown in fig. 1 and 2, two groups of three-plug

power output jacks

5 and 6, a reset button hole 8-a, a test button hole 7-a and a status indicator light hole 30-a are formed in the upper cover 2. A RESET button (RESET)8 and a TEST button (TEST)7 are installed in the RESET button hole 8-a and the TEST button hole 7-a, and the RESET button 8 and the TEST button 7 are contacted with components on the circuit board 18 through the metal ground mounting plate 1 and the insulating mid-layer bracket 3. The side surface of the upper cover 2 is provided with four hooks 2-A which are used for being clamped and fixed with the clamping grooves 4-B on the inner side of the base 4, so that the upper cover 2 and the base 4 are clamped and fixed together.

The metal grounding installation plate 1 is positioned between the upper cover 2 and the insulating middle layer bracket 3 and is connected with the ground through a grounding screw 13-A or a grounding pressure plate 13E (see figure 3) and a lead. And grounding

blades

11 and 12 are arranged on the metal grounding mounting plate 1 and are vertical to the grounding holes of the

power output jacks

5 and 6 of the upper cover 2. Mounting holes 13-B and panel screw mounting holes 13-H are arranged at two ends of the metal grounding mounting plate 1.

As shown in fig. 1, 3, 4-1 and 4-2, an output

conductive metal sheet

14 and 13 is respectively placed on both sides of the insulating middle layer support 3. Sheet-shaped

clamp fins

60, 61, 62 and 63 are arranged at the upper and lower vertical positions of the zero line holes and the live line holes of the

power output jacks

5 and 6 of the upper cover 2 at the two ends of the output

conductive metal sheets

13 and 14.

As shown in fig. 1, the base 4 is used to accommodate the middle layer holder 3 and the circuit board 18. A pair of power supply neutral and live wire input binding screws 9 and 10 and a pair of power supply neutral and live wire output binding screws 109 and 110 are symmetrically arranged on two sides of the base 4.

The core component of the present invention is a circuit board 18 installed in the housing, which has the functions of making the

power output jacks

5, 6 on the socket upper cover 2, and the power output binding screws 109, 110 on both sides of the base 4 have/have no power output, detecting whether the service life of the earth leakage protection socket is over, displaying the detection result, and making the reset button reset/trip reliably and stably.

As shown in fig. 1, 5-2, 4-1 and 4-2, two power live and neutral

input metal sheets

51, 50 are provided on the circuit board 18. One end of the power live wire and zero wire

input metal sheets

51 and 50 is bent downwards by 90 degrees, penetrates through the differential transformer 19 and is welded on the circuit board 18, and is connected with the power live wire and zero wire input wiring screws 10 and 9 through the power

input wiring sheets

25 and 24, the power live wire input wiring screw 10 is connected with the power live wire in the wall through a wire, and the power zero wire input wiring screw 9 is connected with the power zero wire in the wall through a wire. The other end of the power supply live wire input metal sheet 51 is connected with one end (see fig. 6) of the metal sheet 23A through a bus 94A, and the other end of the metal sheet 23A is welded/riveted with a movable contact 23; the other end of the power neutral input blade 50 is connected to one end of another blade 22A (see fig. 6) via a bus bar 94C, and the other end of the blade 22A is soldered/riveted with a movable contact 22.

Of course, the other end of the power line input metal plate 51 can also be directly soldered on the circuit board 18, and connected to one end of the metal plate 23A through a wire on the circuit board. Similarly, the other end of the power neutral input metal strip 50 may also be soldered directly to the circuit board 18 and connected to one end of the metal strip 22A by a wire on the circuit board.

And a pair of power supply live wire and neutral wire output ends 81 and 80 which are contacted with power supply output binding screws 110 and 109 are welded at the other end of the circuit board 18. The live power output 81 is connected to one end of another metal sheet 55A (see fig. 6) via a bus bar 94B, and the other end of the metal sheet 55A is welded/riveted with a moving contact 55; the mains neutral output 80 is connected by a busbar 94D to one end of a further metal blade 54A (see figure 6) and the other end of the blade 54A is welded/riveted with a moving contact 54.

Of course, the power line outlet 81 can also be soldered directly to the circuit board 18 and connected to one end of the metal plate 55A via a wire on the circuit board. Similarly, the power neutral output 80 may be soldered directly to the circuit board 18 and connected to one end of the metal plate 54A by a wire on the circuit board.

As shown in fig. 6, the

metal pieces

23A and 55A are fixed to a lifting arm extending outward from the trip unit 28 side of the reset/trip mechanism. The

metal tabs

22A and 54A are secured to a lifting arm extending outwardly from the other side of the trip unit 28 of the reset/trip mechanism. The

metal sheets

22A, 23A, 55A, 54A move up and down along with the trip 28.

As shown in fig. 4-1, 4-2, 5-1, 5-2 and 5-3, a stationary contact 53 is provided on the corresponding output conductive metal piece 14 above the movable contact 23 at the end of the metal piece 23A, and the movable contact 23 and the stationary contact 53 are vertically corresponding to each other and are contacted or disconnected to form a power switch.

Similarly, a fixed contact 16 is provided on the output conductive metal sheet 14 above the movable contact 55 at the end of the metal sheet 55A, and the movable contact 55 and the fixed contact 16 are vertically corresponding to each other and are contacted or disconnected to form another power switch.

Similarly, a fixed contact 52 is arranged on the output conductive metal sheet 13 corresponding to the upper part of the movable contact 22 at the end part of the metal sheet 22A, and the movable contact 22 and the fixed contact 52 are vertically corresponding to each other and are contacted or disconnected to form a power switch.

Similarly, a fixed contact 15 is arranged on the output conductive metal sheet 13 corresponding to the movable contact 54 above the movable contact 54 at the end part of the metal sheet 54A, and the movable contact 54 and the fixed contact 15 are vertically corresponding to each other and are contacted or disconnected to form a power switch.

The advantages of this structural design: 1. the stress of a reset spring 91 which is sleeved on the reset guide post 35 in the reset/trip mechanism is reduced, and the contact is prevented from being not well contacted. 2. The unstable gauge between the movable contacts is avoided, and the reduction of withstand voltage is caused. 3. The temperature rise of the contacts of the movable contact and the fixed contact is reduced during the work. 4. In the resetting process, the four pairs of power contacts can be automatically adjusted, so that the contact is better. 5. Reducing the occurrence of tripping arcing. 6. The contact has long service life.

As shown in fig. 1, 5-2, 7-1, and 10, the circuit board 18 is further provided with a differential transformer 19 (coils L1, L2 in fig. 10) for detecting a fault current. The power live wire and zero wire

input metal sheets

51 and 50 pass through the differential transformer 19 and are connected with the power live wire and zero wire in the wall through the power input wiring screws 10 and 9. When the leakage phenomenon occurs in the power supply loop, the differential transformer outputs a signal to the control chip IC1, the control chip IC1 outputs a control signal to enable the thyristor V4 to be conducted, so that the trip coil 26 (coil L3 in fig. 10) automatically generates a magnetic field, the iron core 42 built in the trip coil is sucked and pulled to move transversely, the small end of the iron core 42 collides with the latch 30, the latch 30 acts to enable the reset/trip mechanism on the circuit board 18 to act, the reset button 8 is tripped, and the power output of the leakage protection socket is cut off.

As shown in fig. 1, 5-2, 6, 7-1 and 10, a reset/trip mechanism for the earth leakage protection socket with/without power output is also provided on the circuit board 18. The reset/trip mechanism mainly comprises a reset guide post 35 embedded below a reset button 8, a reset spring 91 and a quick trip spring 66-A sleeved on the reset guide post 35, a reset gasket 28A, a T-shaped tripper 28, a lock catch 30, two combined simulated leakage current generating switches 72A, 72, 88 and 66 (switches KR-4 and KR-6 in figure 10) linked with the reset button 8, circuit operating switches 88 and 67 (switch KR-2 in figure 10) and a trip coil 26.

The T-shaped release 28 is positioned below the reset button 8 and is linked with the reset button 8. The left and right sides of the T-shaped release 28 extend outwards to form lifting arms, and two metal sheets are respectively fixed on the lifting arms extending outwards on the left and right sides of the release 28. As shown in fig. 6 and 5-2, two

metal pieces

23A and 55A are fixed to the lifting arm on the trip unit 28 side. One end of the metal sheet 23A is connected with one end of the power supply live wire input metal sheet 51 through a bus 94A; one end of the other metal sheet 55A is connected to the live power output 81 via a bus bar 94B.

As shown in fig. 6 and 5-2, two

metal pieces

22A and 54A are also fixed to the other side of the trip unit 28. One end of the metal sheet 22A is connected with the power supply zero line input metal sheet 50 through a bus 94C; one end of the other metal sheet 54A is connected to the mains neutral output 80 by a busbar 94D.

The

metal pieces

23A, 22A, 54A, 55A are fixed to the arms on both sides of the trip unit 28, and move up and down together with the trip unit 28.

The advantages of this structural design: 1. the stress of the reset spring sleeved on the reset guide post 35 is reduced, and the contact is prevented from being in poor contact. 2. The unstable gauge between the movable contacts is avoided, and the reduction of withstand voltage is caused. 3. The temperature rise of the contacts of the movable contact and the fixed contact is reduced during the work. 4. In the resetting process, the four pairs of power contacts can be automatically adjusted, so that the contact is better. 5. Reducing the occurrence of tripping arcing. 6. The contact has long service life.

The reset pad 28A is located below the reset button 8 and above the "T" shaped trip 28. The reset pad 28A and the trip 28 may be combined to move up and down with the trip 28; at the same time, the reset washer 28A may be separated from the trip unit 28. The trip unit 28 is housed within the trip coil bobbin 26Z, and the reset washer 28A is placed at the trip coil bobbin 26H. Limit stop 26E on reset washer 28A limits the lowest point position of reset washer 28A that can move downward.

A longitudinal through hole 29A through which the reset guide post 35 passes is formed in the middle of the reset washer 28A, and a longitudinal central through hole 29 is also formed in the middle of the trip 28, as shown in fig. 7-1, the reset guide post 35, which is embedded in the bottom surface of the reset button 8 and is sleeved with the reset spring 91 and the quick trip spring 66-a, can move up and down along the through hole 29A and the central through hole 29 in the middle of the reset washer 28A and the trip 28. As shown in fig. 6, the diameter of the upper portion of the reset guide post 35 is larger than that of the lower portion thereof, and a step 35A is formed between the upper and lower portions; the reset spring 91 is sleeved on the upper part of the reset guide post 35 and is positioned between the reset button 8 and the insulated middle-layer bracket 3; a quick trip spring 66-a is sleeved on the lower portion of the reset guide post 35, and the quick trip spring 66-a is located between the step 35A of the reset guide post 35 and the reset washer 28A.

The quick trip spring 66-a enables the reset button 8 to be quickly and reliably tripped, so that the movable contact and the stationary contact are quickly separated, and the service life of the earth leakage protection socket is greatly prolonged.

The reset guide post 35 is provided with a concave locking groove 36 near the bottom thereof, the contact position of the bottom surface of the reset guide post 35 and the locking hole 31 is a plane 41, when the reset button 8 is in a tripping state, the bottom surface 41 of the reset guide post 35 is positioned on the locking buckle 30 and is in a dislocation shape with the locking hole 31 of the top surface 31A of the locking buckle 30.

The middle part of the release 28 is provided with a through hole 30E penetrating through the front and the back of the release, a movable lock catch 30 made of stainless steel material is arranged across the through hole 30E in the middle part of the release 28, and two holes are arranged on the top surface 31A of the lock catch 30, wherein one hole is a mechanical release hole 31B, and the other hole is a lock catch hole 31. When the reset button 8 is in a trip state, the bottom surface 41 of the reset guide post 35 accommodated in the reset spacer 28A, the through hole 29A in the middle of the trip 28, and the central through hole 29 is offset from the latch hole 31 of the top surface 31A of the latch 30.

A latch spring 34 is provided between the outer side wall of the trip unit 28 and the inner side wall of the latch 30. A trip coil 26 having a movable iron core 42 is disposed outside the side wall of the locking device 30, and the movable iron core 42 disposed inside the trip coil 26 faces the locking device 30. The latch 30 is laterally movable by the plunger 42 so that the bottom surface 41 of the reset guide post 35 under the reset button 8 passes into or out of the latch hole 31 of the top surface of the latch 30, and the reset button 8 is reset or tripped (tripped). A tower-shaped spring 42A is sleeved at the end of the step of the movable iron core 42.

As shown in fig. 6, 9-1 to 9-3, and 10, two combined analog leakage current generating switches KR-4 and KR-6, which are simultaneously linked with the RESET button (RESET)8, are provided below or near the tripper 28. Wherein, a simulation leakage current produces the switch KR-4 and is formed by conductive piece 72A and metal shrapnel 72; the other analog leakage current generating switch KR-6 is composed of a conductive member 66 and a metal dome 88.

One end of a conductive piece 72A forming the analog leakage current generating switch KR-4 is connected with a zero line of a power input end passing through the differential transformer 19 through a controllable silicon V4, and the other end is suspended below the metal elastic piece 72; one end of the metal elastic sheet 72 is suspended above the conductive element 72A, and the other end is connected with one end of a metal elastic sheet 88 forming another analog leakage current generating switch KR-6, and is connected with a power input end zero line passing through the differential transformer 19 through a current limiting resistor R6 and a correct power-on indicator lamp V5, and is connected with a power input end live line passing through the differential transformer 19 through a trip coil L3, and is connected with a power input end 6 of the control chip IC1 through a rectifier diode V1 and a resistor R1.

The other end of the metal spring 88 forming the analog leakage current generating switch KR-6 is suspended above one end of the conductive member 66, and the other end of the conductive member 66 is connected to the zero line of the power input terminal through the current limiting resistor R4.

As shown in fig. 9-1, when the reset button 8 is in the tripped state, both of the two analog leakage current generating switches KR-4 and KR-6 linked and combined with the reset button are in the off state.

As shown in fig. 9-2, when the reset button 8 is pressed, both of the two analog leakage current generation switches KR-4 and KR-6 linked and combined with the reset button are closed. As shown in fig. 10, the zero line of the power input end is connected to the live line of the power input end passing through the differential transformer through a resistor R4, a closed analog leakage current generating switch KR-6, and a trip coil L3, so as to form a closed loop to generate the analog leakage current. Because another simulation is leaked current and is produced switch KR-4 closure, the power input end live wire produces switch KR-4 through the simulation of closed leakage current and provides operating power for silicon controlled rectifier V4 and control chip IC1, and control circuit work. Then, the two simulation leakage current generation switches KR-4 and KR-6 are turned off, and the simulation leakage current disappears.

If the earth leakage protection socket has no end of life, the reset/trip mechanism in the earth leakage protection socket acts, the reset button can reset as shown in fig. 9-3, the power supply main power switches KR-2-1, KR-2-2, KR-3-1, KR-3-2 and the circuit working switch KR-2 are closed, and the power output end has power output.

On the contrary, if the service life of the leakage protection socket is ended, the reset/trip mechanism in the leakage protection socket does not act, the reset button cannot be reset all the time, and the power output end has no power output.

As shown in fig. 6, 9-1 to 9-3, and 10, a circuit operating switch KR-2 is provided near the trip unit 28, and the circuit operating switch KR-2 is composed of a metal piece 88 and a metal piece 67. One end of the metal sheet 88 is soldered to the circuit board 18 and connected to the live line through the trip coil L3 through a lead wire to the power input terminal of the differential transformer (L1, L2), and the other end of the metal sheet 88 is riveted with a contact 68A. One end of the metal sheet 67 is suspended above the metal sheet 88, and a contact 67A is riveted at the end part of the metal sheet; the other end of the metal sheet 67 is welded on the circuit board and is connected with the zero line of the power input end of the differential transformer (L1, L2) through the controlled silicon. As shown in fig. 9-1, when the RESET button RESET is in a trip state, the circuit operating switch KR-2 is turned off, and the whole leakage detection protection circuit shown in fig. 10 is not charged. As shown in fig. 9-3, when the reset button is reset, the

contacts

68A and 67A of the circuit operating switch KR-2 are closed, and the circuit operating switch KR-provides the operating power for the whole leakage detection protection circuit.

As shown in fig. 6, reset pad 28A, trip 28, latch 30, two combined analog leakage current generating switches KR-4(72, 72A) and KR-6(66, 88) in conjunction with reset button 8, and circuit operating switch KR-2(88, 67) are disposed within trip coil bobbin 26Z. A trip coil protective cover 41-C is arranged in the coil range of the trip coil 26; the left and right sides of the side surface are respectively provided with a hook foot 41-B for hooking the hole on the circuit board 18.

The reset guide post 35, the reset spring 91 and the fast tripping spring 66-A which are sleeved on the reset guide post 35, the reset gasket 28A, the T-shaped release 28, the lock catch 30, two analog leakage current generating switches KR-4(72, 72A) and KR-6(66, 88) linked with the reset button 8, the circuit working switch KR-2(88, 67) and the tripping coil 26 which form the reset/tripping mechanical device are mutually connected into a whole which can move freely, and the two switches are matched with each other but not matched with each other.

Fig. 6 is a schematic perspective exploded view of the reset/trip mechanism of the present invention. In the reset/trip mechanism shown in fig. 6, the diameters of the upper and lower portions of the reset guide post 35 fitted under the reset button 8 are different, but the diameters of the upper and lower portions of the reset guide post 35 may be the same. The reset spring 91 is sleeved on the upper part of the reset guide post 35 and is positioned between the reset button 8 and the insulated middle-layer bracket 3; a quick trip spring 66-a is fitted over the lower portion of the reset guide post 35, the quick trip spring 66-a being located between the lower portion of the insulated middle bracket 3 and the reset washer 28A.

As shown in fig. 1, fig. 6, and fig. 7-1, the present invention further provides an elastic metal sheet 46 for manually generating a simulated leakage current and a metal sheet 47 connected to the simulated leakage current limiting resistor below the test button 7. As shown in fig. 10, the elastic metal piece 46 and the metal piece 47 constitute a switch KR-5. One end of the elastic metal sheet 46 is connected with a live wire or a zero line of a LOAD at the power output end of the leakage protection socket, the other end of the elastic metal sheet is suspended, and a metal piece 47 connected with a current-limiting resistor for simulating leakage current is arranged below the elastic metal sheet; one end of the metal piece 47 is suspended below the elastic metal sheet 46 and is arranged above the plastic pulling piece 99, and the other end is connected with a zero line or a live line of the power input end through a simulated leakage current limiting resistor. As shown in fig. 8-1, the test button 7 is pressed downward to a first position, so that the elastic metal sheet 46 and the metal member 47 are in contact conduction, and a simulated leakage current is generated manually. As shown in fig. 7-1, the test button 7 is released, the elastic metal piece 46 is disconnected from the metal piece 47, and the simulated leakage current disappears.

As shown in fig. 8-1, pressing the test button 7 downward to the first position causes the elastic metal piece 46 to contact the metal piece 47 to manually generate the simulated leakage current. If the earth leakage protection outlet does not end its life, the reset/trip mechanism in the outlet operates to trip/trip the reset button, fig. 9-1, to cut off the power output of the earth leakage protection outlet. If the life of the earth leakage protection socket is over, i.e. the earth leakage protection socket does not have the earth leakage protection function, the reset/trip mechanism does not act, as shown in fig. 8-1, the reset button cannot be tripped or tripped, and the power output end of the earth leakage protection socket still has power output.

In order to forcibly cut off the power output of the earth leakage protection outlet in this case, the present invention also designs an end-of-life forced mechanical trip device, as shown in fig. 6, 8-2. The forced mechanical trip device is located below the test button and comprises a plastic pull member 99, a resilient steel plate 48 to which the plastic pull member is fixed, and a spring 99C. The plastic pulling piece 99, the elastic steel sheet 48 for fixing the plastic pulling piece and the spring 99C are arranged in the framework 83 at the other end of the tripping coil. The spring 99C is arranged between the chassis platform under the framework 83 and the plastic pulling piece 99, and the elastic steel sheet 48 is clamped in the groove 99B of the plastic pulling piece 99 to fix the plastic pulling piece 99 in the framework 83. A hook leg 99A with a ramp extends from the plastic pull member 99 adjacent the release 28. The hook foot 99A is located over the mechanical release hole 31B at the end of the top surface 31A of the shackle 30.

As shown in fig. 8-1, pressing the test button 7 downward to the first position causes the elastic metal piece 46 to contact the metal piece 47 to manually generate the simulated leakage current. If the earth leakage protection outlet does not end its life, the reset/trip mechanism in the outlet operates to trip/trip the reset button, cutting off the power output of the earth leakage protection outlet (fig. 9-1). If the life of the earth leakage protection socket is terminated, that is, if the earth leakage protection socket does not have the earth leakage protection function, the reset/trip mechanism does not operate, the reset button cannot trip/trip, and when the power output end of the earth leakage protection socket still has the power output, as shown in fig. 8-2, the test button 7 is continuously pressed to the second position, the plastic pulling member 99 moves downward, the spring 99C is compressed, the hook pin 99A of the plastic pulling member 99 is inserted into the mechanical trip hole 31B of the latch 30, the latch 30 is pulled leftward along with the insertion of the hook pin 99A, the lock hole 31 on the top surface of the latch 30 is aligned with the reset guide post 35, the lock groove 36 on the bottom of the reset guide post 35 jumps out of the lock hole 31, the reset button 8 trips/trips, the trip 28 moves downward, the movable contact is separated from the fixed contact, and the power output end.

The test button 7 is released, and under the action of the spring 99C, the plastic pulling piece 99 moves upwards, the hook leg 99A is separated from the hole 31B on the top surface of the lock catch 30, and the forced releasing function is realized.

As shown in FIG. 9-1, the present invention has an upper power indicator V5 and a working indicator V3 welded to a circuit board 18, and a light guide tube 77 is disposed above the two indicators and is disposed longitudinally, the light guide tube 77 passes through a middle bracket 3, and the top end thereof is located at the same level as an indicator hole 30-A on the surface of an upper cover 2. When the power input end of the earth leakage protection socket is connected with a power line in a wall, the power-on indicator lamp V5 is correctly turned on, when the reset button is reset and the earth leakage protection socket has power output, the power-on indicator lamp V5 is turned on, the other work indicator lamp V3 is also turned on, and 2 mixed lights are turned out from the surface of the upper cover of the socket through the light guide tube 77.

As shown in fig. 10, the present invention further includes two display circuits, one is a display circuit for correctly powering up, and the other is a display circuit for normal operation. The correct power-on display circuit consists of a power-on indicator lamp V5 and a current-limiting resistor R6. After the power-on indicator lamp V5, the display circuit and the current-limiting resistor R6 are connected in series, one end of the power-on indicator lamp is connected with a zero line of a power input end passing through the differential transformer, and the other end of the power-on indicator lamp is connected with a live line of the power input end passing through the differential transformer through the trip coil L3.

When the power input end of the leakage protection socket is correctly connected with the power line in the wall, the correct power-on indicator lamp V5 is on, which indicates that the power input end of the leakage detection protection circuit is correctly connected with the power line in the wall. If an operator mistakenly connects the live wire and the zero wire of the power supply in the wall with the live wire and the zero wire of the power output end LOAD of the leakage detection protection circuit, because the RESET button RESET is in a tripping state at the moment, the main power supply switches KR-2-1, KR-2-2, KR-3-1 and KR-3-2 linked with the RESET button RESET are in a disconnecting state, therefore, the two ends of the display circuit are not electrified when being correctly electrified, the indicating lamp V5 is not lightened when being correctly electrified, the work indicating lamp V3 is lightened, and the RESET button cannot be RESET at the same time, so that the leakage detection protection circuit is proved to be in a wrong wiring state, and whether the line connection is correct or not is checked in time.

As shown in fig. 10, the operation state display circuit includes an operation indicator lamp V3, a current limiting resistor R5, and a rectifier diode V2. After the work indicator lamp V3, the current-limiting resistor R5 and the rectifier diode V2 are connected in series, one end of the work indicator lamp is connected with a live wire of the power output end; the other end is connected with a zero line of the power output end.

When the RESET button is in a tripping state, the main power supply switches KR-2-1, KR-2-2, KR-3-1 and KR-3-2 linked with the RESET button are in a disconnecting state, the working state display circuit is in an open circuit, the working indicator lamp V3 is not lightened, and at the moment, the correct power-on indicator lamp V5 is lightened.

When the RESET button is pressed downwards, the main power supply switches KR-2-1, KR-2-2, KR-3-1 and KR-3-2 linked with the RESET button are still in an off state, and the work indicator lamp V3 is not lighted.

When the RESET button is in a RESET state, the circuit working switch KR-2 is closed, the main power supply switches KR-2-1, KR-2-2, KR-3-1 and KR-3-2 linked with the RESET button are closed, and the correct power-on indicator lamp V5 and the working indicator lamp V3 are both on.

According to the invention, through the on-off of the correct power-on display circuit and the working state display circuit, the correct power-on indicator lamp V5 is turned on or off, and the working indicator lamp V3 is turned on or off, so that the working state of the leakage protection socket is reflected. Namely, at least one indicator light is on before the reset button is reset, and at least two indicator lights are simultaneously on after the reset button is reset; if the installer connects the power line of the input end to the output end by mistake, the indicator lamp V5 of the correct power-on state is not lighted, the working indicator lamp V3 is lighted, the reset button is pressed to be not reset all the time, the wrong wiring is proved, only the correct wiring is realized, and the indicator lamp V5 of the correct power-on state is lighted; the reset button can reset, and the work indicator lamp can be lighted.

In a word, the leakage protection socket has three state display functions, wherein the first state display function is powered on, the second state display function is in a normal working state, and the third state display function is in a wrong reverse wiring state. Before the reset button is reset correctly, the correct power-on indicator lamp V5 is on, and after the reset button is reset, the working indicator lamp V3 and the power-on indicator lamp V5 are both on; when the reset button is prevented from being reset, the correct power-on indicator lamp V5 is not turned on, and the working indicator lamp V3 is turned on, indicating a wrong wiring state.

In the embodiment of the present invention, the indicator light V5 for correct power-on and the indicator light V3 for normal operation are two indicator lights with different colors.

As shown in FIGS. 9-1 to 9-3 and 10, the present invention comprises 7 switches, wherein 4 power supply main circuit switches KR-2-1, KR-2-2, KR-3-1 and KR-3-2, 2 combined analog leakage currents generate switches KR-4 and KR-6, and 1 circuit operation switch KR-2.

As shown in fig. 9-1 and 10, when the reset button is in the trip state and the earth leakage protection socket has no power output, the combination of the 4 power supply main loop switches KR-2-1, KR-2-2, KR-3-1 and KR-3-2, and the 1 circuit operating switch KR-2 and the 2 combined analog leakage current generation switches KR-4 and KR-6 in the earth leakage protection socket are all in the off state.

As shown in fig. 9-2 and 10, when the reset button is pressed, the earth leakage protection socket still has no power output, 4 power supply main loop switches KR-2-1, KR-2-2, KR-3-1, KR-3-2 and 1 circuit operating switch KR-2 in the earth leakage protection socket are in an off state, and 2 combined analog leakage current generation switches KR-4 and KR-6 are closed.

As shown in fig. 9-3 and 10, when the reset button is reset and the earth leakage protection socket has power output, the 2 combined simulated leakage current generation switches KR-4 and KR-6 in the earth leakage protection socket are in an off state, and the 4 power supply main circuit switches KR-2-1, KR-2-2, KR-3-1, KR-3-2 and 1 circuit operating switch KR-2 are in a closed state.

In order to prolong the service life of the leakage protection socket and avoid damage to the leakage protection socket caused by instantaneous high voltage generated by lightning stroke or other reasons, as shown in fig. 1 and 6, a pair of right-angled triangular or isosceles triangular discharging metal sheets 25A and 24A for discharging are respectively welded on circuits, connected with power input terminal strips 25 and 24, connected with power live wire and zero wire input terminal screws 10 and 9, of the leakage protection socket and a circuit board, the tips of the two metal sheets are oppositely arranged and keep a certain interval, and the distance between the tops of the two metal sheets is less than half of the distance between the bottoms of the two metal sheets. The discharge metal pieces 25A, 24A are placed in the fixing case 82. The advantages of this design: 1. the processing and the manufacturing are convenient; 2. the assembly is stable and the precision is high; 3. the manufacturing cost is low.

When instantaneous high voltage caused by lightning stroke or other reasons acts on the earth leakage protection socket, an air medium between the right-angle triangular discharge metal sheet connected to the live wire of the input end and the right-angle triangular discharge metal sheet connected to the zero line of the input end is broken down to form air discharge, most of the high voltage is consumed through the discharge metal sheets, and the rest of the high voltage is consumed through the trip coil SOL and the piezoresistor MOV, so that the earth leakage protection socket is protected from being damaged by the high voltage.

In a specific embodiment of the present invention, the varistor MOV is a surge suppressing varistor, so that it can also prevent electrophoresis.

In order to prevent the occurrence of electric shock casualty accidents caused by mistakenly touching live conductors in the power output jacks on the surface of the electric leakage protection socket, as shown in figure 1, the invention also arranges a safety baffle device of the power output jacks above the power output jacks. The safety baffle device for the power output jack is formed by combining a left sliding block 205, a right sliding block 206, a T-shaped small sliding

block

208 and 2 springs 207. When the power plug is not inserted into the earth leakage protection socket, the left slider 205, the right slider 206 and the T-shaped small slider 208 cover the live wire and zero wire output conductive plug bush, when the power plug is inserted into the earth leakage protection socket, the left slider 205, the right slider 206 and the T-shaped small slider 208 move to expose the live wire and zero wire output conductive plug bush below the left slider 205, the right slider 206 and the T-shaped small slider 208 under the action of the blades on the power plug, and the power plug is inserted into the live wire and zero wire output conductive plug bush and has power output. When the power plug is pulled out from the earth leakage protection socket, the left slider 205, the right slider 206 and the T-shaped small slider 208 are restored to the initial positions under the action of the spring 207, and the power live wire and zero wire output conductive plug bushes below the left slider 205, the right slider 206 and the T-shaped small slider are covered.

The above description is the specific embodiment of the present invention and the technical principle applied, and any equivalent transformation based on the technical scheme of the present invention is within the protection scope of the present invention.

Claims

1. A novel leakage protection socket comprises a shell, a reset button and a test button which are arranged on the shell, a circuit board which is arranged in the shell and can realize the power output or no power output of the leakage protection socket, and at least one pair of a first output conductive metal sheet (13) and a second output conductive metal sheet (14) which are arranged in the shell, wherein the circuit board is provided with at least one pair of power live wires, zero line input metal sheets (51, 50), at least one pair of power live wires, zero line output ends (81, 80) and a reset/trip mechanical device; the method is characterized in that:

one end of each of the power live wire and zero line input metal sheets (51 and 50) is bent downwards by 90 degrees, passes through a differential transformer (19) and is welded on a circuit board (18), is connected with power live wire and zero line input wiring screws (10 and 9), and is connected with the power live wire and zero line in the wall through wires;

the other end of the power supply live wire input metal sheet (51) is connected with one metal sheet (23A) through a bus (94A); the other end of the power supply zero line input metal sheet (50) is connected with the other metal sheet (22A) through a bus (94C);

the output ends (81, 80) of the live wire and the zero wire of the power supply are welded at the other end of the circuit board (18) and are contacted with the power output wiring screws (110, 109); the power supply live wire output end (81) is connected with another metal sheet (55A) through a bus (94B); the output end (80) of the power supply zero line is connected with another metal sheet (54A) through a bus (94D);

the metal sheet (23A) is fixed on a lifting arm at one side of the release (28); one end of the metal sheet (23A) is connected with the power supply live wire input metal sheet (51) through a bus (94A); a moving contact (23) is welded/riveted at the end part of the other end of the metal sheet (23A); a fixed contact (53) is welded/riveted on the second output conductive metal sheet (14) arranged on one side of the middle layer bracket (3) of the shell above the movable contact (23); the moving contact (23) on the metal sheet (23A) is vertically corresponding to the static contact (53) on the second output conductive metal sheet (14) and is contacted or disconnected to form a power switch;

the other metal sheet (55A) is fixed on a lifting arm at one side of the release (28); one end of the metal sheet (55A) is connected with the power supply live wire output end (81) through a bus (94B); a moving contact (55) is welded/riveted at the end part of the other end of the metal sheet (55A), a static contact (16) is welded/riveted on a second output conductive metal sheet (14) arranged on one side of the middle layer bracket (3) of the shell above the moving contact (55), and the moving contact (55) on the metal sheet (55A) is vertically corresponding to the static contact (16) on the second output conductive metal sheet (14) and is contacted or disconnected to form another power switch;

the other metal sheet (22A) is fixed on the lifting arm at the other side of the release (28); one end of the metal sheet (22A) is connected with the power supply zero line input metal sheet (50) through a bus (94C); a moving contact (22) is welded/riveted at the end part of the other end of the metal sheet (22A); a fixed contact (52) is welded/riveted on a first output conductive metal sheet (13) arranged on one side of the middle layer bracket (3) of the shell above the movable contact (22); a moving contact (22) on the metal sheet (22A) is vertically corresponding to a static contact (52) on the first output conductive metal sheet (13) and is contacted or disconnected to form a power switch;

the other metal sheet (54A) is fixed on the lifting arm at the other side of the release (28); one end of the metal sheet (54A) is connected with the output end (80) of the power supply zero line through a bus (94D); a moving contact (54) is welded/riveted at the end part of the other end of the metal sheet (54A), a static contact (15) is welded/riveted on a first output conductive metal sheet (13) arranged on one side of the middle layer bracket (3) of the shell above the moving contact (54), and the moving contact (54) on the metal sheet (54A) is vertically corresponding to the static contact (15) on the first output conductive metal sheet (13) and is contacted or disconnected to form a power switch.

2. A novel earth leakage protection socket according to claim 1, wherein: the earth leakage protection socket is also provided with a life-span termination forced mechanical tripping device;

the forced mechanical tripping device is positioned below the test button (7) and comprises a plastic pulling piece (99), an elastic steel sheet (48) for fixing the plastic pulling piece and a spring (99C); the plastic pulling piece (99), the elastic steel sheet (48) for fixing the plastic pulling piece and the spring (99C) are arranged in the tripping coil framework (83);

the spring (99C) is placed between the tripping coil framework (83) and the position right below the plastic pulling piece (99), the elastic steel sheet (48) is clamped in a groove (99B) on the plastic pulling piece (99), and the plastic pulling piece (99) is fixed in the tripping coil framework (83);

a hook foot (99A) with a slope extends from one side of the plastic pulling piece (99) close to the release (28); a mechanical tripping hole (31B) is formed on the top surface of the inner lock catch (30) of the earth leakage protection socket below the hook pin (99A);

pressing the test button (7) downwards to a first position to enable a metal test sheet (46) in the leakage protection socket to be in contact with a conducting sheet (47) connected with the current-limiting resistor for simulating leakage current to manually generate simulated leakage current; if the life of the earth leakage protection socket is ended, the reset button cannot be tripped or tripped; continuing to press the test button (7) to the second position; the plastic pulling piece (99) is enabled to move downwards, the spring (99C) is compressed, the elastic steel sheet (48) is also compressed and deformed, the hook pin (99A) of the plastic pulling piece (99) is inserted into the mechanical tripping hole (31B) on the top surface of the lock catch (30), the lock catch (30) is pulled leftwards along with the insertion of the hook pin (99A), the lock catch hole (31) on the top surface of the lock catch (30) is enabled to be aligned with the reset guide post (35), the lock groove (36) at the bottom of the reset guide post (35) jumps out of the lock catch hole (31) and is separated, the reset button (8) trips/trips, the tripper (28) moves downwards, the movable contact is separated from the static contact, and the power output end of the leakage protection socket has no power output.

3. A novel earth leakage protection socket according to claim 2, wherein: a straight-angle triangular or isosceles triangular pointed discharge metal sheet which is arranged in a fixed box and used for discharging is respectively welded on a power input end circuit board connected with live wire and zero wire input wiring screws (10 and 9) of a power supply of the leakage protection socket, the pointed discharge metal sheets are oppositely arranged and keep a certain interval, and the head parts of the pointed ends of the two metal sheets are exposed to the same height; the distance between the tops of the two metal sheets is less than half of the distance between the bottoms of the two metal sheets.

4. A novel earth leakage protection socket according to claim 3, wherein: the earth leakage protection socket also comprises at least one group of power output jack safety baffle device;

the safety baffle device for the power output jack is formed by combining a left sliding block (205), a right sliding block (206), a T-shaped small sliding block (208) and 2 springs (207);

when the power plug is not inserted into the earth leakage protection socket, the left sliding block (205), the right sliding block (206) and the T-shaped small sliding block (208) cover the power live wire and zero wire output conductive plug bush, when the power plug is inserted into the earth leakage protection socket, the left sliding block (205), the right sliding block (206) and the T-shaped small sliding block (208) move to expose the power live wire and zero wire output conductive plug bush below the left sliding block, the right sliding block (206) and the T-shaped small sliding block under the action of the blades on the power plug, the power plug is inserted into the power live wire and zero wire output conductive plug bush and has power output, when the power plug is pulled out of the earth leakage protection socket, the left sliding block (205), the right sliding block (206) and the T-shaped small sliding block (208) restore to the initial positions under the action of the spring (207) to cover the power live wire and zero wire output conductive plug bush below the power plug.

5. A novel earth leakage protection socket according to claim 4, wherein: the leakage protection socket also comprises two combined simulated leakage current generation switches (KR-4 and KR-6) which are linked with the reset button (8) simultaneously;

the combined simulated leakage current generating switches (KR-4 and KR-6) are arranged below or beside a release (28) in the reset/trip mechanical tripping device; wherein,

a simulated leakage current generating switch (KR-4) composed of a conductive piece (72A) and a metal elastic piece (72); the other analog leakage current generating switch (KR-6) consists of a conductive piece (66) and a metal elastic piece (88);

one end of the conductive piece (72A) forming the analog leakage current generating switch (KR-4) is connected with a zero line of a power input end passing through the differential transformer (19) through a silicon controlled rectifier (V4), and the other end is suspended below the metal elastic sheet (72); one end of the metal elastic sheet (72) is suspended above the conductive piece (72A), the other end of the metal elastic sheet is connected with one end of a metal elastic sheet (88) forming another analog leakage current generating switch (KR-6), and is connected with a zero line of a power input end penetrating through the differential transformer (19) through a current limiting resistor (R6) and a correct power-on indicator lamp (V5), and is also connected with a live wire of the power input end penetrating through the differential transformer (19) through a tripping coil (L3), and is also connected with the power input end (6) of the control chip (IC 1) through a rectifier diode (V1) and a resistor (R1);

the other end of the metal elastic sheet (88) forming the other analog leakage current generating switch (KR-6) is suspended above one end of the other conductive piece (66), and the other end of the conductive piece (66) is connected with the zero line of the power supply input end through a current limiting resistor (R4);

when the reset button is in a tripping state and a reset state, the 2 combined analog leakage current generation switches (KR-4 and KR-6) are simultaneously in an off state; when the reset button is pressed, the 2 combined analog leakage current generating switches (KR-4 and KR-6) are simultaneously closed to generate analog leakage current, and are simultaneously and immediately opened at any time.

6. A novel earth leakage protection socket according to claim 4 or 5, wherein: the earth leakage protection socket also comprises a circuit working switch (KR-2) linked with the reset button; the circuit working switch (KR-2) is composed of a fifth metal sheet (88) and a sixth metal sheet (67); wherein,

one end of the fifth metal sheet (88) is welded on the circuit board (18) and is connected with a live wire passing through a power input end of the differential transformer (19) through a trip coil (L3) by a lead, and the other end of the fifth metal sheet is riveted with a contact (68A);

one end of the sixth metal sheet (67) is suspended above the fifth metal sheet (88), and a contact (67A) is riveted at the end part of the sixth metal sheet; the other end is welded on the circuit board and is connected with a zero line passing through the power input end of the differential transformer (19) through a controlled silicon;

when the reset button is in a tripping state, the circuit working switch (KR-2) is switched off, and the whole leakage detection protection circuit is not electrified; when the reset button is reset, the circuit working switch (KR-2) is closed, and the circuit working switch (KR-2) provides a working power supply for the whole leakage detection protection circuit.

7. A novel earth leakage protection socket according to claim 6, wherein: two indicator lamps are arranged in the leakage protection socket, one indicator lamp is a correct power-on indicator lamp (V5), and the other indicator lamp is a working indicator lamp (V3); before the reset button is reset, the correct power-on indicator lamp (V5) is on; after the reset button is reset, the two indicator lights are both on.

8. A novel earth leakage protection socket according to claim 7, wherein: the leakage protection socket has the function of preventing wiring errors, if an installer connects a power line in a wall to the power output end of the leakage protection socket in an error manner, the power-on state indicator lamp (V5) is not on correctly, and the reset button is pressed to be not reset all the time, so that the wrong wiring is proved, and only if the wiring is correct, the power-on state indicator lamp (V5) is on correctly, and the reset button can be reset.

9. A novel earth leakage protection socket according to claim 8, wherein: the leakage protection socket has three state display functions, wherein the first state display function is a power-on state display function, the second state display function is a normal working state display function, and the third state display function is a wrong reverse wiring display function;

before the reset button is reset correctly, the correct power-on indicator lamp (V5) is on, and after the reset button is reset, the working indicator lamp (V3) is on; when the reset button is prevented from being reset, the correct power-on indicator lamp (V5) is not on, indicating that the wiring is wrong.

10. A novel earth leakage protection socket according to claim 9, wherein: the earth leakage protection socket has three state switches linked with a reset button: the circuit comprises analog leakage current generation switches (KR-4 and KR-6), a circuit working switch (KR-2) and a power supply main power switch (KR-2-1, KR-2-2, KR-3-1 and KR-3-2);

11. A novel earth leakage protection socket according to claim 10, wherein: the top surface of a lock catch (30) in the service life termination forced mechanical tripping device is provided with at least two mechanical holes, one mechanical tripping hole (31B) and one lock catch hole (31);

the mechanical tripping hole (31B) is arranged right below the hook leg 99A of the plastic pulling piece (99); when the reset button is in a tripping state, the locking hole (31) and the bottom surface (41) of the reset guide post (35) are in a dislocation shape.