CN211238593U

CN211238593U - Leakage protection plug

Info

Publication number: CN211238593U
Application number: CN202020099373.XU
Authority: CN
Inventors: 刘勇; 沈中明
Original assignee: Foshan Shunde City Xinhuida Electronics Co ltd
Current assignee: Foshan Shunde City Xinhuida Electronics Co ltd
Priority date: 2020-01-17
Filing date: 2020-01-17
Publication date: 2020-08-11
Anticipated expiration: 2030-01-17

Abstract

The utility model relates to a leakage protection plug, which comprises a shell, a live wire static contact piece, a zero line static contact piece, a live wire pin, a zero line pin, a live wire movable contact piece, a zero line movable contact piece, a mounting rack, a relay assembly and a circuit board; the relay assembly is characterized by further comprising a swinging pressing block, wherein a first mounting position and a second mounting position are arranged on the mounting frame, the swinging pressing block is rotatably mounted on the second mounting position and comprises a cross arm, the extending end of an iron core of the relay assembly is matched with the cross arm, a live wire pressing arm and a zero wire pressing arm are respectively arranged on the cross arm, an upward extending bulge is arranged in the middle of the cross arm, and a reflecting layer is coated on the upper surface of the bulge; the advantages are that: under the condition of no fault, when the power supply is switched on, the live wire movable contact piece is automatically switched on with the live wire static contact piece, and the zero line movable contact piece is automatically switched on with the zero line static contact piece, so that the power supply is convenient to use and compact in structure, and has the function of memorizing the previous action; when the reset button is switched on all the time, the zero fire and two poles are not switched on, and a relay type free tripping mode is realized.

Description

Leakage protection plug

Technical Field

The utility model relates to a leakage protection plug.

Background

The existing leakage protection plug comprises a shell, a reset button, a live wire static contact, a zero line static contact, a live wire pin, a zero line pin, a live wire movable contact, a zero line movable contact, a mounting rack, a relay assembly, a tripping card and a circuit board, wherein an iron core of the relay assembly is matched with the tripping card to drive a cross arm to move up and down, so that the live wire movable contact is switched on and off with the live wire static contact, and the zero line movable contact is switched on and off with the zero line static contact; under the condition of no fault, when the power supply is switched on, the live wire movable contact piece and the live wire static contact piece can not be automatically switched on, and the zero line movable contact piece and the live wire static contact piece can not be automatically switched on, so that the use is inconvenient.

Disclosure of Invention

The utility model aims at overcoming the defects of the prior art and providing a leakage protection plug, under the condition of no fault, when the power is switched on, the live wire movable contact piece is automatically switched on with the live wire static contact piece, and the zero line movable contact piece is automatically switched on with the zero line static contact piece, thereby having convenient use, compact structure and the function of memorizing the previous action; when the reset button is switched on all the time, the zero fire and two poles are not switched on, and a relay type free tripping mode is realized.

In order to achieve the purpose, the utility model discloses a realize like this, it is a leakage protection plug, including shell, live wire static contact, zero line static contact, live wire base pin, zero line base pin, live wire movable contact, zero line movable contact, mounting bracket, relay subassembly and circuit board; the relay assembly comprises a coil, an iron core and a spring; it is characterized by also comprising a swinging pressing block; the shell is provided with a light hole A, the mounting frame is mounted in the shell, and the circuit board is mounted on the mounting frame; a first mounting position and a second mounting position are respectively arranged on the mounting rack; the relay assembly is arranged on the first installation position; the swing pressing block is rotatably installed on the second installation position and comprises a cross arm, the extending end of an iron core of the relay assembly is matched with the cross arm so as to drive the swing pressing block to swing left and right, a fire wire pressing arm and a zero wire pressing arm which extend downwards are arranged on the front side and the rear side of the cross arm respectively, an upward extending bulge is arranged in the middle of the cross arm, a reflecting layer is coated on the upper surface of the bulge, the reflecting layer on the bulge can correspond to the light transmission hole A, and the fire wire pressing arm and the zero wire pressing arm are located on the front side and the rear side of the second installation position respectively; the live wire static contact and the zero line static contact are respectively positioned on the front side and the rear side of the mounting rack, one end of the live wire static contact is provided with a live wire static contact, and one end of the zero line static contact is provided with a zero line static contact; the live wire movable contact piece is installed on the upper portion of the live wire plug pin and is electrically connected with the live wire plug pin, one end of the live wire movable contact piece is electrically connected with the circuit board, the lower end of the live wire pressing arm abuts against the live wire movable contact piece so that the other end of the live wire movable contact piece is in contact electrical connection with the live wire stationary contact, the other end of the live wire movable contact piece corresponds to the live wire stationary contact, and the creepage distance is 3mm +/-0.5 mm; the zero line movable contact piece is arranged on the upper part of the zero line pin and is electrically connected, one end of the zero line movable contact piece is electrically connected with the circuit board, the lower end of the zero line pressure arm is abutted against the zero line movable contact piece so as to push the zero line movable contact piece to enable the other end of the zero line movable contact piece to be in contact with and electrically connected with the zero line static contact, the other end of the zero line movable contact piece corresponds to the zero line static contact, and the creepage distance is 3mm +/-0.5 mm;

in the technical scheme, the left side surface and the right side surface of the bottom of the live wire pressure arm are both inclined upwards to form a triangular shape so as to push the live wire movable contact piece to move, and the left side surface and the right side surface of the bottom of the zero line pressure arm are both inclined upwards to form a triangular shape so as to push the zero line movable contact piece to move.

In the technical scheme, the LED lamp further comprises a light-transmitting cover and an indicator light, wherein the light-transmitting cover is arranged on the light-transmitting hole A, and the reflecting layer on the upper surface of the protrusion transmits light through the light-transmitting cover and the light-transmitting hole A; the indicating lamp is arranged on the circuit board and electrically connected with the circuit board, and the upper part of the indicating lamp extends out of the shell.

In the technical scheme, the live wire movable contact piece is bent and comprises a live wire longitudinal piece and a live wire transverse piece; the lower part of the live wire longitudinal piece is arranged on the upper part of the live wire pin, the upper part of the live wire longitudinal piece is inserted on the circuit board and is electrically connected, the live wire transverse piece tilts upwards to enable the creepage distance between the end part of the live wire transverse piece and the live wire stationary contact to be 3mm +/-0.5 mm, and the lower end of the live wire pressing arm abuts against the live wire transverse piece to push the live wire transverse piece to swing downwards; the zero line movable contact spring is the form of buckling, and it includes that interconnect's zero line indulges piece and zero line cross piece, the zero line is indulged the piece and is installed on the upper portion that the zero line was participated in, and the zero line is indulged the upper portion of piece and is inserted on the circuit board and the electricity is connected, the zero line cross piece upwards perk makes the creepage distance between the tip of zero line cross piece and the zero line stationary contact be 3mm 0.5mm, thereby the lower extreme of zero line pressure arm leans on with zero line cross piece counterbalance and promotes the zero line cross piece and swings downwards.

In the technical scheme, the grounding wire device further comprises a grounding wire static contact piece, a grounding wire pin and a grounding wire movable contact piece; the ground wire static contact piece is arranged in the shell and positioned between the live wire static contact piece and the zero line static contact piece, one end of the ground wire static contact piece is provided with a ground wire static contact, the upper part of the ground wire pin is arranged in the shell and positioned between the live wire pin and the zero line pin, and the lower part of the ground wire pin extends out of the shell; the ground wire moving contact piece is bent and comprises a ground wire transverse piece and a ground wire longitudinal piece, the ground wire longitudinal piece is installed on the upper portion of the ground wire plug pin, the upper portion of the ground wire longitudinal piece is inserted into the circuit board and electrically connected, and the ground wire transverse piece is tilted upwards to enable the creepage distance between the end portion of the ground wire transverse piece and the ground wire static contact to be 3mm +/-0.5 mm; and the second mounting position is provided with a swinging hole, the middle part of a cross arm of the swinging pressing block extends downwards to form a ground wire pressing arm, the ground wire pressing arm is positioned in the swinging hole and can swing, and the lower end of the ground wire pressing arm is abutted against a ground wire cross piece so as to push a ground wire movable contact piece to be in contact electrical connection with a ground wire static contact.

In the technical scheme, the left side surface and the right side surface of the lower part of the ground wire pressure arm are inclined upwards to form a triangle shape so as to push the ground wire movable contact piece to move.

In the technical scheme, a live wire protrusion is arranged at the upper part of the live wire pin, a live wire insertion port is arranged on the live wire longitudinal sheet, and the live wire insertion port is inserted on the live wire protrusion, so that the live wire movable contact sheet is fixed on the live wire pin; the upper part of the zero line pin is provided with a zero line bulge, the zero line longitudinal piece is provided with a zero line plug-in port, and the zero line plug-in port is plugged in the zero line bulge, so that the zero line movable contact piece is fixed on the zero line pin.

In the technical scheme, the upper part of the ground wire pin is provided with a ground wire bulge, the ground wire longitudinal piece is provided with a ground wire inserting port, and the ground wire inserting port is inserted into the ground wire bulge so as to fix the ground wire movable contact piece on the ground wire pin.

In the technical scheme, a live wire static contact mounting position for mounting a live wire static contact, a ground wire static contact mounting position for mounting a ground wire static contact, a zero line static contact mounting position for mounting a zero line static contact, a live wire pin mounting position for mounting a live wire pin, a ground wire pin mounting position for mounting a ground wire pin, a zero line pin mounting position for mounting a zero line pin and a mounting frame mounting position for mounting a mounting frame are respectively arranged at the bottom in the shell.

Compared with the prior art, the utility model the advantage do: after zero-fire power loss, the three-pole linked switch can be immediately disconnected, so that the use safety of a user is guaranteed; under the condition of no fault, when a power supply is switched on, the live wire movable contact piece is automatically switched on with the live wire static contact piece, and the zero line movable contact piece is automatically switched on with the zero line static contact piece.

Drawings

Fig. 1 is a perspective view of the present invention;

fig. 2 is an exploded view of the present invention;

FIG. 3 is a perspective view of the present invention with the outer shell removed;

FIG. 4 is a top view of FIG. 1

FIG. 5 is a sectional view A-A of FIG. 4;

FIG. 6 is a cross-sectional view B-B of FIG. 4;

FIG. 7 is a schematic structural view of the present invention with the housing, the circuit board, the test button, the reset button, the indicator light and the light-shielding cover removed;

FIG. 8 is a schematic view of the FIG. 7 construction with the mounting bracket removed;

FIG. 9 is a schematic diagram of the relay assembly and the wobble block of FIG. 8 with the relay assembly removed;

figure 10 is a schematic view of the lower half of the housing;

fig. 11 shows the matching between the swing pressing block and the iron core.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Furthermore, the technical features mentioned in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

In the description of the present invention, the terms "front", "rear", "right", "left", "lower" and "upper" indicate the position or positional relationship based on the position or positional relationship shown in the drawings, and are only for convenience of description of the present invention rather than for requirement that the present invention must be constructed and operated in a specific position, and thus, should not be construed as limiting the present invention.

Example one

As shown in fig. 1 to 11, it is an earth leakage protection plug, which includes a housing 1, a live wire static contact 6, a zero line static contact 8, a live wire pin 9, a zero line pin 11, a live wire movable contact 12, a zero line movable contact 14, a mounting bracket 15, a relay assembly 17 and a circuit board 19; the relay assembly 17 comprises a coil, an iron core and a spring; it is characterized by also comprising a swinging pressing block 16; a light hole 1A is formed in the shell 1, the mounting frame 15 is installed in the shell 1, and the circuit board 19 is installed on the mounting frame 15; the mounting frame 15 is respectively provided with a first mounting position 151 and a second mounting position 152; the relay assembly 17 is mounted on the first mounting position 151; the swing pressing block 16 is rotatably mounted on the second mounting position 152, the swing pressing block 16 comprises a cross arm, the extending end of an iron core 173 of the relay assembly 17 is matched with the cross arm to drive the swing pressing block 16 to swing left and right, a fire wire pressing arm 161 and a zero wire pressing arm 162 which extend downwards are respectively arranged on the front side and the rear side of the cross arm, an upward extending bulge 165 is arranged in the middle of the cross arm, a reflective layer is coated on the upper surface of the bulge 165, the reflective layer on the bulge 165 can correspond to the light transmission hole 1A, and the fire wire pressing arm 161 and the zero wire pressing arm 162 are respectively located on the front side and the rear side of the second mounting position 152; the live wire static contact 6 and the zero line static contact 8 are respectively positioned on the front side and the rear side of the mounting frame 15, one end of the live wire static contact 6 is provided with a live wire static contact 61, and one end of the zero line static contact 8 is provided with a zero line static contact 81; the live wire movable contact piece 12 is arranged at the upper part of the live wire pin 9 and is electrically connected, one end of the live wire movable contact piece 12 is electrically connected with the circuit board 19, the lower end of the live wire pressure arm 161 is abutted against the live wire movable contact piece 12 so as to push the live wire movable contact piece 12 to enable the other end of the live wire movable contact piece 12 to be in contact with and electrically connected with the live wire fixed contact 61, the other end of the live wire movable contact piece 12 corresponds to the live wire fixed contact 61, and the creepage distance is 3.5 mm; the zero line movable contact piece 14 is installed on the upper portion of the zero line pin 11 and electrically connected, one end of the zero line movable contact piece 14 is electrically connected with the circuit board 19, the lower end of the zero line pressure arm 162 abuts against the zero line movable contact piece 14 to push the zero line movable contact piece 14 to enable the other end of the zero line movable contact piece 14 to be in contact with and electrically connected with the zero line stationary contact 81, the other end of the zero line movable contact piece 14 corresponds to the zero line stationary contact 81, and the creepage distance is 3.5 mm.

The leakage plug has the power-off protection function, and when the power is lost due to zero fire (including power failure and too low voltage), the leakage protection switch cuts off the power supply, so that the use safety of a user is guaranteed; under the condition of no fault, when the power supply is switched on, the live wire movable contact piece is automatically switched on with the live wire static contact piece, and the zero line movable contact piece 14 is automatically switched on with the zero line static contact piece 8.

The coil 172 of the relay assembly 17 is mounted in the first mounting location 151 and electrically connected to the circuit board 19, the iron core 173 and the spring 174 are provided in the coil 172, the iron core 173 can be horizontally moved in the coil 172, the right end of the spring 174 abuts on the coil 172, the left end of the spring 174 abuts on the right end of the iron core 173, an annular bulge 1731 is arranged at the right end of the iron core 173, the annular bulge 1731 is clamped on the swinging press block 16, the iron core 173 moves to drive the swinging press block 16 to swing, the live wire press arm 161 pushes the live wire movable contact 12 to enable the live wire movable contact 12 to be electrically contacted with the live wire fixed contact 61, the zero line press arm 162 pushes the zero line movable contact 14 to enable the zero line movable contact 14 to be electrically contacted with the zero line fixed contact 81, the swinging pressing block 16 is provided with a U-shaped groove 164, the iron core 173 is provided with an annular protrusion 1731, and the annular protrusion 1731 is clamped in the U-shaped groove 164.

The circuit board 19 is also provided with a reset button 4 and a test button 3; the upper part of the reset button 4 extends out of the shell 1, and the reset button 4 controls the relay assembly 17 to reset; the upper part of the test button 3 extends out of the shell 1, when the leakage protection load is used or is not used for a long time, the test button can be pressed to enable the leakage protection plug to automatically cut off the power supply, and the power supply is switched on to recover power supply by pressing the reset button after the leakage protection plug is used for the next time; when the reset button 4 is always switched on, the zero-fire two poles can not be switched on, and the relay type free tripping mode is realized

In this embodiment, the left and right sides of the bottom of the live line pressure arm 161 are both inclined upward to form a triangle shape so as to push the live line moving contact 12 to move, and the left and right sides of the bottom of the neutral line pressure arm 162 are both inclined upward to form a triangle shape so as to push the neutral line moving contact 14 to move.

In this embodiment, the light-transmitting cover further comprises a light-transmitting cover 2 and an indicator lamp 5, wherein the light-transmitting cover 2 is installed on the light-transmitting hole 1A, and the reflective layer on the upper surface of the protrusion 165 transmits light through the light-transmitting cover 2 and the light-transmitting hole 1A; the indicator lamp 5 is mounted on the circuit board 19 and electrically connected with the circuit board 19, and the upper part of the indicator lamp 5 extends out of the shell 1.

In this embodiment, the live wire moving contact 12 is bent, and includes a live wire longitudinal piece 121 and a live wire transverse piece 122; the lower part of the live wire longitudinal piece 121 is arranged on the upper part of the live wire pin 9, the upper part of the live wire longitudinal piece 121 is inserted on the circuit board 19 and is electrically connected, the live wire transverse piece 122 tilts upwards to enable the creepage distance between the end part of the live wire transverse piece 122 and the live wire stationary contact 61 to be 3.5mm, and the lower end of the live wire pressure arm 161 abuts against the live wire transverse piece 122 to push the live wire transverse piece 122 to swing downwards; the neutral moving contact 14 is bent and comprises a neutral longitudinal piece 141 and a neutral cross piece 142 which are connected with each other, the neutral longitudinal piece 141 is installed on the upper part of the neutral pin 11, the upper part of the neutral longitudinal piece 141 is inserted on the circuit board 19 and electrically connected, the neutral cross piece 142 is tilted upwards to enable the creepage distance between the end part of the neutral cross piece 142 and the neutral stationary contact 81 to be 3.5mm, and the lower end of the neutral pressing arm 162 abuts against the neutral cross piece 142 to push the neutral cross piece 142 to swing downwards.

In this embodiment, the ground wire device further comprises a ground wire static contact piece 7, a ground wire pin 10 and a ground wire movable contact piece 13; the ground wire static contact piece 7 is arranged in the shell 1 and is positioned between the live wire static contact piece 6 and the zero line static contact piece 8, one end of the ground wire static contact piece 7 is provided with a ground wire static contact 71, the upper part of the ground wire pin 10 is arranged in the shell 1 and is positioned between the live wire pin 9 and the zero line pin 11, and the lower part of the ground wire pin 10 extends out of the shell 1; the ground moving contact piece 13 is bent and comprises a ground transverse piece 132 and a ground longitudinal piece 131, the ground longitudinal piece 131 is installed on the upper part of the ground pin 10, the upper part of the ground longitudinal piece 131 is inserted on the circuit board 19 and is electrically connected, and the ground transverse piece 132 is tilted upwards to ensure that the creepage distance between the end part of the ground transverse piece 132 and the ground static contact 71 is 3.5 mm; a swing hole 153 is formed at the second mounting position 152, a ground wire pressure arm 163 extends downwards from the middle of the cross arm of the swing pressing block 16, the ground wire pressure arm 163 is located in the swing hole 153 and can swing, and the lower end of the ground wire pressure arm 163 abuts against the ground wire cross piece 132 so as to push the ground wire movable contact piece 13 to be in contact and electrical connection with the ground wire stationary contact 71.

In this embodiment, both left and right sides of the lower portion of the ground pressing arm 163 are inclined upward to form a triangle shape so as to push the ground moving contact 13 to move.

In this embodiment, a live wire protrusion 91 is disposed on the upper portion of the live wire pin 9, a live wire insertion port 124 is disposed on the live wire longitudinal sheet 121, and the live wire insertion port 124 is inserted on the live wire protrusion 91, so that the live wire movable contact 12 is fixed on the live wire pin 9; a neutral wire bulge 111 is arranged at the upper part of the neutral wire pin 11, a neutral wire insertion port 144 is arranged on the neutral wire longitudinal piece 141, and the neutral wire insertion port 144 is inserted on the neutral wire bulge 111, so that the neutral wire movable contact 14 is fixed on the neutral wire pin 11.

In this embodiment, a ground protrusion 101 is disposed on the upper portion of the ground pin 10, a ground plug 134 is disposed on the ground longitudinal piece 131, and the ground plug 134 is plugged into the ground protrusion 101, so that the ground moving contact piece 13 is fixed on the ground pin 10.

In this embodiment, a live wire static contact mounting position 112 for mounting the live wire static contact 6, a ground wire static contact mounting position 113 for mounting the ground wire static contact 7, a neutral wire static contact mounting position 114 for mounting the neutral wire static contact 8, a live wire pin mounting position 115 for mounting the live wire pin 9, a ground wire pin mounting position 116 for mounting the ground wire pin 10, a neutral wire pin mounting position 117 for mounting the neutral wire pin 11, and a mounting bracket mounting position 118 for mounting the mounting bracket 15 are provided on the bottom portion inside the housing 1, respectively.

Example two

As shown in fig. 1 to 11, it is an earth leakage protection plug, which includes a housing 1, a live wire static contact 6, a neutral wire static contact 8, a live wire pin 9, a neutral wire pin 11, a live wire moving contact 12, a neutral wire moving contact 14, a mounting bracket 15, a relay assembly 17, a normally closed contact 166 and a circuit board 19; the relay assembly 17 includes a coil 172, an iron core 173 and a spring 174; it is characterized by also comprising a swinging pressing block 16; a light hole 1A is formed in the shell 1, the mounting frame 15 is installed in the shell 1, and the circuit board 19 is installed on the mounting frame 15; the mounting frame 15 is respectively provided with a first mounting position 151 and a second mounting position 152; the relay assembly 17 is mounted on the first mounting position 151; the swing pressing block 16 is rotatably mounted on the second mounting position 152, the swing pressing block 16 comprises a cross arm, the extending end of an iron core 173 of the relay assembly 17 is matched with the cross arm to drive the swing pressing block 16 to swing left and right, a fire wire pressing arm 161 and a zero wire pressing arm 162 which extend downwards are respectively arranged on the front side and the rear side of the cross arm, an upward extending bulge 165 is arranged in the middle of the cross arm, a reflective layer is coated on the upper surface of the bulge 165, the reflective layer on the bulge 165 can correspond to the light transmission hole 1A, and the fire wire pressing arm 161 and the zero wire pressing arm 162 are respectively located on the front side and the rear side of the second mounting position 152; the live wire static contact 6 and the zero line static contact 8 are respectively positioned on the front side and the rear side of the mounting frame 15, one end of the live wire static contact 6 is provided with a live wire static contact 61, and one end of the zero line static contact 8 is provided with a zero line static contact 81; the live wire movable contact piece 12 is arranged at the upper part of the live wire pin 9 and is electrically connected, one end of the live wire movable contact piece 12 is electrically connected with the circuit board 19, the lower end of the live wire pressure arm 161 is abutted against the live wire movable contact piece 12 so as to push the live wire movable contact piece 12 to enable the other end of the live wire movable contact piece 12 to be in contact with and electrically connected with the live wire fixed contact 61, the other end of the live wire movable contact piece 12 corresponds to the live wire fixed contact 61, and the creepage distance is 3 mm; the zero line movable contact piece 14 is installed on the upper portion of the zero line pin 11 and electrically connected, one end of the zero line movable contact piece 14 is electrically connected with the circuit board 19, the lower end of the zero line pressure arm 162 abuts against the zero line movable contact piece 14 to push the zero line movable contact piece 14 to enable the other end of the zero line movable contact piece 14 to be in contact with and electrically connected with the zero line stationary contact 81, the other end of the zero line movable contact piece 14 corresponds to the zero line stationary contact 81, and the creepage distance is 3 mm.

The leakage plug has the power-off protection function, and when the power is lost due to zero fire (including power failure and over-high and over-low voltage), the leakage protection switch cuts off the power supply, so that the use safety of a user is guaranteed; under the condition of no fault, when the power supply is switched on, the live wire movable contact piece is automatically switched on with the live wire static contact piece, and the zero line movable contact piece 14 is automatically switched on with the live wire static contact piece 8, so that the device is convenient to use and compact in structure.

The circuit board 19 is also provided with a reset button 4 and a test button 3; the upper part of the reset button 4 extends out of the shell 1, and the reset button 4 controls the relay assembly 17 to reset; the upper part of the test button 3 extends out of the shell 1, when the leakage protection load is used up or is not used for a long time, the test button can be pressed, the leakage protection plug automatically cuts off the power supply, the power supply is switched on and is recovered to supply power after the leakage protection plug is used for the next time, and the reset button is pressed.

In this embodiment, the live wire moving contact 12 is bent, and includes a live wire longitudinal piece 121 and a live wire transverse piece 122; the lower part of the live wire longitudinal piece 121 is arranged on the upper part of the live wire pin 9, the upper part of the live wire longitudinal piece 121 is inserted on the circuit board 19 and is electrically connected, the live wire transverse piece 122 tilts upwards to enable the creepage distance between the end part of the live wire transverse piece 122 and the live wire stationary contact 61 to be 3mm, and the lower end of the live wire pressure arm 161 abuts against the live wire transverse piece 122 to push the live wire transverse piece 122 to swing downwards; the neutral moving contact 14 is bent and comprises a neutral longitudinal piece 141 and a neutral transverse piece 142 which are connected with each other, the neutral longitudinal piece 141 is installed on the upper portion of the neutral pin 11, the upper portion of the neutral longitudinal piece 141 is inserted on the circuit board 19 and electrically connected, the neutral transverse piece 142 is tilted upwards to enable the creepage distance between the end of the neutral transverse piece 142 and the neutral stationary contact 81 to be 3mm, and the lower end of the neutral pressing arm 162 abuts against the neutral transverse piece 142 to push the neutral transverse piece 142 to swing downwards.

In this embodiment, the ground wire device further comprises a ground wire static contact piece 7, a ground wire pin 10 and a ground wire movable contact piece 13; the ground wire static contact piece 7 is arranged in the shell 1 and is positioned between the live wire static contact piece 6 and the zero line static contact piece 8, one end of the ground wire static contact piece 7 is provided with a ground wire static contact 71, the upper part of the ground wire pin 10 is arranged in the shell 1 and is positioned between the live wire pin 9 and the zero line pin 11, and the lower part of the ground wire pin 10 extends out of the shell 1; the ground moving contact piece 13 is bent and comprises a ground transverse piece 132 and a ground longitudinal piece 131, the ground longitudinal piece 131 is installed on the upper part of the ground pin 10, the upper part of the ground longitudinal piece 131 is inserted on the circuit board 19 and is electrically connected, and the ground transverse piece 132 is tilted upwards to ensure that the creepage distance between the end part of the ground transverse piece 132 and the ground static contact 71 is 3 mm; a swing hole 153 is formed at the second mounting position 152, a ground wire pressure arm 163 extends downwards from the middle of the cross arm of the swing pressing block 16, the ground wire pressure arm 163 is located in the swing hole 153 and can swing, and the lower end of the ground wire pressure arm 163 abuts against the ground wire cross piece 132 so as to push the ground wire movable contact piece 13 to be in contact and electrical connection with the ground wire stationary contact 71.

EXAMPLE III

As shown in fig. 1 to 11, it is an earth leakage protection plug, which includes a housing 1, a live wire static contact 6, a zero line static contact 8, a live wire pin 9, a zero line pin 11, a live wire movable contact 12, a zero line movable contact 14, a mounting bracket 15, a relay assembly 17 and a circuit board 19; the relay assembly 17 includes a coil 172, an iron core 173 and a spring 174; it is characterized by also comprising a swinging pressing block 16; a light hole 1A is formed in the shell 1, the mounting frame 15 is installed in the shell 1, and the circuit board 19 is installed on the mounting frame 15; the mounting frame 15 is respectively provided with a first mounting position 151 and a second mounting position 152; the relay assembly 17 is mounted on the first mounting position 151; the swing pressing block 16 is rotatably mounted on the second mounting position 152, the swing pressing block 16 comprises a cross arm, the extending end of an iron core 173 of the relay assembly 17 is matched with the cross arm to drive the swing pressing block 16 to swing left and right, a fire wire pressing arm 161 and a zero wire pressing arm 162 which extend downwards are respectively arranged on the front side and the rear side of the cross arm, an upward extending bulge 165 is arranged in the middle of the cross arm, a reflective layer is coated on the upper surface of the bulge 165, the reflective layer on the bulge 165 can correspond to the light transmission hole 1A, and the fire wire pressing arm 161 and the zero wire pressing arm 162 are respectively located on the front side and the rear side of the second mounting position 152; the live wire static contact 6 and the zero line static contact 8 are respectively positioned on the front side and the rear side of the mounting frame 15, one end of the live wire static contact 6 is provided with a live wire static contact 61, and one end of the zero line static contact 8 is provided with a zero line static contact 81; the live wire movable contact piece 12 is arranged at the upper part of the live wire pin 9 and is electrically connected, one end of the live wire movable contact piece 12 is electrically connected with the circuit board 19, the lower end of the live wire pressure arm 161 is abutted against the live wire movable contact piece 12 so as to push the live wire movable contact piece 12 to enable the other end of the live wire movable contact piece 12 to be in contact with and electrically connected with the live wire fixed contact 61, the other end of the live wire movable contact piece 12 corresponds to the live wire fixed contact 61, and the creepage distance is 2.5 mm; the zero line movable contact piece 14 is installed on the upper portion of the zero line pin 11 and electrically connected, one end of the zero line movable contact piece 14 is electrically connected with the circuit board 19, the lower end of the zero line pressure arm 162 abuts against the zero line movable contact piece 14 to push the zero line movable contact piece 14 to enable the other end of the zero line movable contact piece 14 to be in contact with and electrically connected with the zero line stationary contact 81, the other end of the zero line movable contact piece 14 corresponds to the zero line stationary contact 81, and the creepage distance is 2.5 mm.

The leakage plug has the power-off protection function, and when the power is lost due to zero fire (including power failure and too low voltage), the leakage protection switch cuts off the power supply, so that the use safety of a user is guaranteed; under the condition of no fault, when the power supply is switched on, the live wire movable contact piece and the live wire static contact piece are automatically switched on, the zero line movable contact piece 14 and the live wire static contact piece 8 are automatically switched on, the use is inconvenient, and the structure is compact.

In this embodiment, the left and right sides of the bottom of the live line pressure arm 161 are both inclined upward to form a triangle shape to push the live line moving contact 12 to move, the left and right sides of the bottom of the zero line pressure arm 162 are both inclined upward to form a triangle shape to push the zero line moving contact 14 to move, and if the switch is to be switched off, the live line moving contact is kept in contact with the normally closed contact 166 to form a normally closed switch.

In this embodiment, the live wire moving contact 12 is bent, and includes a live wire longitudinal piece 121 and a live wire transverse piece 122; the lower part of the live wire longitudinal piece 121 is arranged on the upper part of the live wire pin 9, the upper part of the live wire longitudinal piece 121 is inserted on the circuit board 19 and is electrically connected, the live wire transverse piece 122 tilts upwards to enable the creepage distance between the end part of the live wire transverse piece 122 and the live wire stationary contact 61 to be 2.5mm, and the lower end of the live wire pressure arm 161 abuts against the live wire transverse piece 122 to push the live wire transverse piece 122 to swing downwards; the neutral moving contact 14 is bent and comprises a neutral longitudinal piece 141 and a neutral cross piece 142 which are connected with each other, the neutral longitudinal piece 141 is installed on the upper part of the neutral pin 11, the upper part of the neutral longitudinal piece 141 is inserted on the circuit board 19 and electrically connected, the neutral cross piece 142 is tilted upwards to enable the creepage distance between the end part of the neutral cross piece 142 and the neutral stationary contact 81 to be 2.5mm, and the lower end of the neutral pressing arm 162 abuts against the neutral cross piece 142 to push the neutral cross piece 142 to swing downwards.

In this embodiment, the ground wire device further comprises a ground wire static contact piece 7, a ground wire pin 10 and a ground wire movable contact piece 13; the ground wire static contact piece 7 is arranged in the shell 1 and is positioned between the live wire static contact piece 6 and the zero line static contact piece 8, one end of the ground wire static contact piece 7 is provided with a ground wire static contact 71, the upper part of the ground wire pin 10 is arranged in the shell 1 and is positioned between the live wire pin 9 and the zero line pin 11, and the lower part of the ground wire pin 10 extends out of the shell 1; the ground moving contact piece 13 is bent and comprises a ground transverse piece 132 and a ground longitudinal piece 131, the ground longitudinal piece 131 is installed on the upper part of the ground pin 10, the upper part of the ground longitudinal piece 131 is inserted on the circuit board 19 and is electrically connected, and the ground transverse piece 132 is tilted upwards to ensure that the creepage distance between the end part of the ground transverse piece 132 and the ground static contact 71 is 2.5 mm; a swing hole 153 is formed at the second mounting position 152, a ground wire pressure arm 163 extends downwards from the middle of the cross arm of the swing pressing block 16, the ground wire pressure arm 163 is located in the swing hole 153 and can swing, and the lower end of the ground wire pressure arm 163 abuts against the ground wire cross piece 132 so as to push the ground wire movable contact piece 13 to be in contact and electrical connection with the ground wire stationary contact 71.

The embodiments of the present invention are described in detail with reference to the drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention.

Claims

1. A leakage protection plug comprises a shell (1), a live wire static contact piece (6), a zero line static contact piece (8), a live wire pin (9), a zero line pin (11), a live wire movable contact piece (12), a zero line movable contact piece (14), a mounting rack (15), a relay assembly (17) and a circuit board (19); the relay assembly (17) comprises a coil, an iron core and a spring; it is characterized by also comprising a swinging pressing block (16); a light hole (1A) is formed in the shell (1), the mounting frame (15) is installed in the shell (1), and the circuit board (19) is installed on the mounting frame (15); a first mounting position (151) and a second mounting position (152) are respectively arranged on the mounting rack (15); the relay assembly (17) is mounted on a first mounting position (151); the swing pressing block (16) is rotatably installed on the second installation position (152), the swing pressing block (16) comprises a cross arm, the extending end of an iron core (173) of the relay assembly (17) is matched with the cross arm to drive the swing pressing block (16) to swing left and right, a fire wire pressing arm (161) and a zero wire pressing arm (162) which extend downwards are respectively arranged on the front side and the rear side of the cross arm, an upward extending bulge (165) is arranged in the middle of the cross arm, a light reflecting layer is coated on the upper surface of the bulge (165), the light reflecting layer on the bulge (165) can correspond to the light transmitting hole (1A), and the fire wire pressing arm (161) and the zero wire pressing arm (162) are respectively located on the front side and the rear side of the second installation position (152); the live wire static contact piece (6) and the zero line static contact piece (8) are respectively positioned on the front side and the rear side of the mounting frame (15), a live wire static contact (61) is arranged at one end of the live wire static contact piece (6), and a zero line static contact (81) is arranged at one end of the zero line static contact piece (8); the live wire movable contact piece (12) is arranged at the upper part of the live wire plug pin (9) and is electrically connected, one end of the live wire movable contact piece (12) is electrically connected with the circuit board (19), the lower end of the live wire pressure arm (161) is abutted against the live wire movable contact piece (12) so as to push the live wire movable contact piece (12) to enable the other end of the live wire movable contact piece (12) to be in contact and electrical connection with the live wire stationary contact (61), the other end of the live wire movable contact piece (12) corresponds to the live wire stationary contact (61), and the creepage distance is 3mm +/-0.5 mm; the zero line movable contact piece (14) is installed on the upper portion of the zero line pin (11) and electrically connected, one end of the zero line movable contact piece (14) is electrically connected with the circuit board (19), the lower end of the zero line pressure arm (162) abuts against the zero line movable contact piece (14) to push the zero line movable contact piece (14) to enable the other end of the zero line movable contact piece (14) to be in contact electrical connection with the zero line stationary contact (81), the other end of the zero line movable contact piece (14) corresponds to the zero line stationary contact (81), and the creepage distance is 3mm +/-0.5 mm.

2. A residual current protection plug according to claim 1, characterized in that the left and right sides of the bottom of said live wire pressing arm (161) are both inclined upward to form a triangle shape so as to push the live wire moving contact (12) to move, and the left and right sides of the bottom of said neutral wire pressing arm (162) are both inclined upward to form a triangle shape so as to push the neutral wire moving contact (14) to move.

3. A leakage protection plug according to claim 1, further comprising a light-transmitting cover (2) and an indicator light (5), wherein the light-transmitting cover (2) is mounted on the light-transmitting hole (1A), and the light-reflecting layer on the upper surface of the protrusion (165) transmits light through the light-transmitting cover (2) and the light-transmitting hole (1A); the indicating lamp (5) is installed on the circuit board (19) and electrically connected with the circuit board (19), and the upper portion of the indicating lamp (5) extends out of the shell (1).

4. A residual current protective plug as claimed in claim 1, characterized in that said live movable contact (12) is of a bent shape comprising a live longitudinal piece (121) and a live transverse piece (122); the lower part of the live wire longitudinal piece (121) is arranged on the upper part of the live wire plug pin (9), the upper part of the live wire longitudinal piece (121) is inserted on the circuit board (19) and is electrically connected, the live wire transverse piece (122) tilts upwards to enable the creepage distance between the end part of the live wire transverse piece (122) and the live wire stationary contact (61) to be 3mm +/-0.5 mm, and the lower end of the live wire pressure arm (161) abuts against the live wire transverse piece (122) to push the live wire transverse piece (122) to swing downwards; zero line movable contact (14) are the form of buckling, and it includes that interconnect's zero line indulges piece (141) and zero line horizontal piece (142), the upper portion at zero line base pin (11) is installed to zero line indulge piece (141), and the upper portion that zero line indulged piece (141) is inserted on circuit board (19) and is connected electrically, zero line horizontal piece (142) upwards perk makes the creepage distance between tip and zero line stationary contact (81) of zero line horizontal piece (142) be 3mm 0.5mm, thereby the lower extreme of zero line pressure arm (162) offsets with zero line horizontal piece (142) and leans on and promote zero line horizontal piece (142) and swing downwards.

5. A residual current protection plug as claimed in claim 1, characterized by further comprising a ground static contact (7), a ground pin (10) and a ground moving contact (13); the ground wire static contact (7) is arranged in the shell (1) and is positioned between the live wire static contact (6) and the zero line static contact (8), one end of the ground wire static contact (7) is provided with a ground wire static contact (71), the upper part of the ground wire pin (10) is arranged in the shell (1) and is positioned between the live wire pin (9) and the zero line pin (11), and the lower part of the ground wire pin (10) extends out of the shell (1); the ground wire moving contact piece (13) is bent and comprises a ground wire transverse piece (132) and a ground wire longitudinal piece (131), the ground wire longitudinal piece (131) is installed on the upper portion of the ground wire pin (10), the upper portion of the ground wire longitudinal piece (131) is inserted into the circuit board (19) and electrically connected, and the ground wire transverse piece (132) tilts upwards to enable the creepage distance between the end portion of the ground wire transverse piece (132) and the ground wire stationary contact (71) to be 3mm +/-0.5 mm; the second mounting position (152) is provided with a swinging hole (153), the middle of a cross arm of the swinging pressing block (16) extends downwards to form a ground wire pressure arm (163), the ground wire pressure arm (163) is positioned in the swinging hole (153) and can swing, and the lower end of the ground wire pressure arm (163) abuts against a ground wire cross piece (132) so as to push the ground wire movable contact piece (13) to be in contact electrical connection with a ground wire static contact (71).

6. A residual current leakage protection plug according to claim 5, wherein the left and right side faces of the lower portion of said ground voltage arm (163) are both inclined upward to form a triangular shape so as to push the ground moving contact (13) to move.

7. A residual current protection plug as claimed in claim 4, characterized in that a live wire protrusion (91) is provided on the upper portion of said live wire pin (9), a live wire insertion port (124) is provided on said live wire longitudinal piece (121), said live wire insertion port (124) is inserted on said live wire protrusion (91) so as to fix said live wire moving contact piece (12) on said live wire pin (9); the upper part of the neutral pin (11) is provided with a neutral protrusion (111), the neutral longitudinal piece (141) is provided with a neutral plug-in port (144), and the neutral plug-in port (144) is plugged in the neutral protrusion (111) so that the neutral movable contact piece (14) is fixed on the neutral pin (11).

8. A residual current protection plug as claimed in claim 5, characterized in that a ground projection (101) is provided on the upper part of said ground pin (10), and a ground plug-in opening (134) is provided on said ground longitudinal piece (131), said ground plug-in opening (134) being inserted into said ground projection (101) so as to fix said ground moving contact piece (13) to said ground pin (10).

9. A residual current protection plug as claimed in claim 1, characterized in that said housing (1) is provided at its bottom with a live wire static contact mounting location (112) for mounting a live wire static contact (6), a ground wire static contact mounting location (113) for mounting a ground wire static contact (7), a neutral wire static contact mounting location (114) for mounting a neutral wire static contact (8), a live wire pin mounting location (115) for mounting a live wire pin (9), a ground wire pin mounting location (116) for mounting a ground wire pin (10), a neutral wire pin mounting location (117) for mounting a neutral wire pin (11) and a mounting bracket mounting location (118) for mounting a mounting bracket (15), respectively.