CN221201693U - Structure improved leakage protection plug mechanism - Google Patents

Abstract

The utility model provides a leakage protection plug mechanism of institutional advancement, includes casing, circuit board, reset assembly, base, tripping unit, current transformer and participate in the unit; the circuit board is arranged in the shell, the reset component vertically penetrates through the circuit board and is in sliding connection with the circuit board, the base is arranged at the lower position of the circuit board, and the tripping unit is integrally arranged on the base and is electrically connected with the circuit board; the current transformer is arranged at a position on one side of the base opposite to the tripping unit and is electrically connected with the circuit board, and the current transformer body is transversely arranged along the horizontal direction; the pin unit is arranged at the lower position of the base and penetrates out of the shell, and the tripping unit is electrically connected with the pin unit and can be connected with or disconnected from the pin unit. The advantages are that: the plug structure has the advantages that the overall arrangement of the plug structure is more compact, the smaller height dimension is realized, the assembly efficiency is improved, the installation is convenient, the integration degree is enhanced, the joint is convenient to access, the space is effectively saved, and the use safety is improved.

Description

Structure improved leakage protection plug mechanism

Technical Field

The utility model belongs to the technical field of electrical equipment, and particularly relates to a leakage protection plug mechanism with an improved structure.

Background

The leakage protection plug device is an indispensable matching device for protecting electric appliances, wherein the application of the small-sized leakage protection plug device is particularly wide, and particularly, the small-sized leakage protection plug device can play a role in rapidly cutting off a power supply when the leakage condition occurs in the electric appliances in a power circuit with smaller power such as a circuit switch, a socket or a wiring board and the like and needing terminal leakage protection. In particular, the leakage protection plug device is widely used for the leakage protection of terminal appliances such as electric heating tables, water storage type water heaters, electric blowing cylinders, electric clamps, electric shears, dust collectors, electric bathtubs, electric water heaters, electric cookers, televisions, refrigerators, microwave ovens, washing machines, medical equipment, instruments and meters and the like. For example, the "a leakage protector" disclosed in chinese patent application publication No. CN107818890a is installed on a multipurpose socket or a power strip, and is connected to the socket through input and output terminals, and a plug is additionally installed on the socket, which may cause the disadvantages of large size, large space occupation and high cost of the whole leakage protector in use. The utility model document with the publication number of CN217362064U introduces a leakage protection plug mechanism, which comprises a tripping device, a pin assembly and a bottom plate, wherein the tripping device is used for rapidly cutting off a power supply when an electric appliance has a leakage condition, the pin assembly is used for being inserted into a socket so as to enable the electric appliance to be connected with a circuit, the tripping device and the pin assembly are combined into a whole through the bottom plate to form the leakage protection plug mechanism, so that the whole mechanism is compact and convenient to install, but a current transformer in the tripping device in the technical scheme is vertically arranged, so that a base is increased in height dimension for being matched with the current transformer, the height dimension of the whole mechanism is larger, the occupied space is large, and the integration degree of the structure is inconvenient to promote.

In view of the above-described prior art, there is a need for further improvements in the construction of earth leakage protectors. To this end, the inventors have advantageously devised that the technical solutions described below are created in this context.

Disclosure of utility model

The object of the utility model is to provide an earth leakage protection plug mechanism with improved structure, which is beneficial to realizing the compactness of the internal structure of the plug mechanism and reducing the overall height dimension by horizontally arranging and installing a current transformer at a position on one side of a base opposite to a tripping unit, thereby being convenient to install and use.

The task of the utility model is accomplished in that a leakage protection plug mechanism with improved structure comprises: the device comprises a shell with a shell inner cavity, a circuit board, a reset assembly, a base, a tripping unit, a current transformer and a pin unit; the circuit board is arranged at the upper position of the inner cavity of the shell, the reset component vertically penetrates through the circuit board, the base is arranged at the lower position of the circuit board, the tripping unit is integrally arranged on the base and is electrically connected with the circuit board, the tripping unit is used for cutting off the power supply when the electric appliance has the electric leakage condition, and the reset component is used for providing reset force for the tripping unit; the current transformer is arranged at one side of the base opposite to the tripping unit and is electrically connected with the circuit board, the current transformer body is transversely arranged along the horizontal direction, and the current transformer is used for generating induced current when a circuit has a leakage condition and driving the tripping unit to realize tripping action through the circuit board; the pin unit is arranged at the lower position of the base and penetrates out of the shell, the pin unit is used for being inserted into a jack of a socket and is powered on, and the tripping unit is electrically connected with the pin unit and can be connected with and disconnected from the pin unit.

In a specific embodiment of the utility model, the shell is provided with an upper cover and a base which are mutually buckled and butted, and fixing screws are respectively arranged at four corners of the base, penetrate through the base and are screwed with the upper cover, so that the upper cover and the base are fixedly connected.

In another specific embodiment of the present utility model, the reset assembly includes a reset fastener and a reset spring, the reset fastener has a circular cap-shaped reset button and a fastening shaft, the reset button is hollow and disposed above the circuit board, the reset button protrudes upward from the upper cover, a reset waterproof glue cap is further disposed at a position on the upper cover corresponding to the reset button, the bottom of the reset button is provided with an open hole, the fastening shaft extends downward from the top of the reset button and passes through the circuit board, the reset spring is sleeved on the shaft body of the fastening shaft, and the upper end and the lower end of the reset spring are respectively abutted to the top surface plate of the reset button and the circuit board; the buckling shaft extends downwards into the base.

In yet another specific embodiment of the present utility model, the trip unit includes a trip coil assembly, an armature assembly, a latch and a cross arm, the trip coil assembly is integrally disposed at an end portion of the base in a length direction, and the trip coil assembly includes a coil frame having a cylindrical shape and a coil sleeved in the coil frame, and the trip coil assembly is electrically connected to a circuit on the circuit board; the coil rack is arranged at the lower part of the circuit board, the armature assembly comprises an armature body and an armature spring which is abutted against one end part of the armature body, the armature body is arranged in the coil rack in a penetrating way, one end of the lock catch is a vertical U-shaped buckle which is vertically arranged, one end part of the armature body, far away from the armature spring, is buckled in the vertical U-shaped buckle of the lock catch, a horizontal U-shaped buckle which extends horizontally is also formed on the lock catch, a buckling shaft clamping groove is formed on the shaft body of the buckling shaft of the reset buckling piece, and the vertical U-shaped buckle is buckled in the buckling shaft clamping groove; the cross arm is sleeved on the transverse U-shaped buckle of the lock catch, and the buckling shaft is also arranged in the cross arm in a penetrating way.

In still another specific embodiment of the present utility model, the cross arm includes a block and cross bars formed at two sides of the block, the block is hollow and forms a hollow cavity, the transverse U-shaped buckle and the buckling shaft are both arranged in the hollow cavity of the block in a penetrating way, and the block is provided with a block sliding groove for the transverse U-shaped buckle to slide horizontally; and an N-end moving contact assembly and an L-end moving contact assembly are respectively arranged on the two cross bars, the N-end moving contact assembly comprises an N-end contact support plate and an N-end moving contact, the N-end moving contact is arranged at one end part position in the length direction of the N-end contact support plate, the other end part in the length direction of the N-end contact support plate is bent and extends upwards to pass through the circuit board, the L-end moving contact assembly also comprises an L-end contact support plate and an L-end moving contact, the L-end moving contact is also arranged at one end part position in the length direction of the L-end contact support plate, and the other end part in the length direction of the L-end contact support plate is bent and extends upwards to pass through the circuit board.

In still another specific embodiment of the present utility model, the current transformer is integrally provided in an annular structure, a current transformer through hole is formed at a central position of the current transformer, an N-end output support plate and an L-end output support plate are inserted in the current transformer through hole, and lower parts of the N-end output support plate and the L-end output support plate are bent and extended and electrically connected with an electric energy transmission wire of an output cable; the N-end output support plate upwards penetrates through the base and is matched with the base to be installed together, the top end of the N-end output support plate penetrates through the circuit board and is positioned and arranged at a position close to the top end of the N-end contact support plate, the top end of the N-end output support plate and the end of the N-end contact support plate far away from the N-end moving contact are electrically connected, the L-end output support plate upwards penetrates through the base and is matched with the base to be installed together, the top end of the L-end output support plate penetrates through the circuit board and is positioned and arranged at a position close to the top end of the L-end contact support plate, and the top end of the L-end output support plate and the end of the L-end contact support plate far away from the N-end moving contact are electrically connected.

In a further specific embodiment of the present utility model, the pin unit includes a pin base plate, an N-terminal pin, an L-terminal pin and a ground pin, which are cooperatively mounted on the pin base plate, wherein the ground pin is disposed between the N-terminal pin and the L-terminal pin, and the N-terminal pin and the L-terminal pin are symmetrically disposed with respect to the ground pin; an N-end fixed contact is further installed on the top end part of the N-end pin, an L-end fixed contact is installed on the top end part of the L-end pin, the N-end fixed contact is arranged at the lower position relative to the N-end moving contact, the N-end fixed contact and the N-end moving contact form on/off matching, the L-end fixed contact is arranged at the lower position relative to the L-end moving contact, and the L-end fixed contact and the L-end moving contact form on/off matching.

In a further specific embodiment of the present utility model, pin slots through which the N-terminal pins, the L-terminal pins, and the ground pins pass are provided in the pin base plate, three of the pin slots penetrate through the thickness direction of the pin base plate, and socket base plate pins for being clamped on the base are further protruded on a surface of the pin base plate opposite to the base.

The utility model has the beneficial effects that due to the adoption of the structure, the utility model has the following advantages: according to the technical scheme, the current transformer is horizontally arranged and installed at one side position of the base opposite to the tripping unit, so that the overall arrangement of the plug structure is more compact, the smaller height dimension is realized, meanwhile, the assembly efficiency can be remarkably improved, the installation is convenient, the integration degree is enhanced, the joint is conveniently accessed, the space can be effectively saved, and the use safety is improved.

Drawings

FIG. 1 is an exploded view of an embodiment of the present utility model;

FIG. 2 is an exploded view of an internal structure according to an embodiment of the present utility model;

FIG. 3 is a schematic perspective view illustrating an internal structure according to an embodiment of the present utility model;

FIG. 4 is a schematic perspective view of an internal structure at another angle according to an embodiment of the present utility model;

Fig. 5 is a cross-sectional view of the internal structure of an embodiment of the present utility model.

In the figure: 1. the device comprises a shell, a shell inner cavity, a shell upper cover, a reset waterproof rubber cap, a base and a fixing screw, wherein the shell is provided with a shell inner cavity, a shell upper cover, a shell lower cover and a reset waterproof rubber cap, the shell upper cover is provided with a shell upper cover, the reset waterproof rubber cap is provided with a shell upper cover, the shell upper cover is provided with a shell upper cover, the reset waterproof rubber cap is provided with a shell upper; 2. a circuit board; 3. reset component, 31, reset fastener, 311, reset button, 312, fastening shaft, 3121, fastening shaft clamping groove, 32, reset spring; 4. a base; 5. trip unit, 51, trip coil assembly, 511, coil form, 512, coil, 52, armature assembly, 521, armature body, 522, armature spring, 53, catch, 531, vertical U-shaped catch, 532, lateral U-shaped catch, 54, cross arm, 541, stop, 5411, stop slide slot, 542, cross bar, 55, 551, 552, 56, 561, 562. 6. A current transformer, 61. A current transformer through hole; 7. the pin unit, 71, the pin bottom plate, 711, the pin clamping groove, 712, the pin bottom plate clamping pin, 72, 721, 73, 731, 74, the grounding pin; outputting a support plate at the N end; 9.L ends output a support plate; 10. a three-core cable.

Detailed Description

The following detailed description of specific embodiments of the utility model, while given in connection with the accompanying drawings, is not intended to limit the scope of the utility model, and any changes that may be made in the form of the inventive concepts described herein, without departing from the spirit and scope of the utility model.

In the following description, any reference to the directions or azimuths of up, down, left, right, front and rear is based on the positions shown in the corresponding drawings, and therefore, should not be construed as a limitation on the technical solutions provided by the present utility model.

Referring to fig. 1 and 2, there is shown an improved earth leakage protection plug mechanism, which comprises a housing 1 having a housing cavity 11, a circuit board 2, a reset assembly 3, a base 4, a trip unit 5, a current transformer 6 and a pin unit 7; the circuit board 2 is arranged at the upper position of the inner cavity 11 of the shell, the reset component 3 vertically penetrates through the circuit board 2 and is in sliding connection with the circuit board 2, the base 4 is arranged at the lower position of the circuit board 2, the tripping unit 5 is integrally arranged on the base 4 and is electrically connected with the circuit board 2, the tripping unit 5 is used for cutting off the power supply when the electric appliance has electric leakage, and the reset component 3 is used for providing reset force for the tripping unit 5; the current transformer 6 is arranged at a position of one side of the base 4 opposite to the tripping unit 5 and is electrically connected with the circuit board 2, the current transformer 6 body is transversely arranged along the horizontal direction, and the current transformer 6 is used for generating induced current when the electric leakage condition occurs in the circuit and driving the tripping unit 5 to realize tripping action through the circuit board 2; the pin unit 7 is disposed below the base 4 and penetrates the housing 1, the pin unit 7 is configured to be plugged into a jack of a socket and is powered on, and the trip unit 5 is electrically connected to the pin unit 7 and is capable of being connected to and disconnected from the pin unit 7.

Further, the housing 1 is provided with an upper cover 12 and a base 13 that are engaged with each other in a snap-fit manner, and fixing screws 14 are disposed at four corners of the base 13, and the fixing screws 14 penetrate through the base 13 and are screwed with the upper cover 12, thereby fixedly connecting the upper cover 12 and the base 13 to form the housing 1.

Referring to fig. 1 and 2 in combination with fig. 3 to 5, the reset assembly 3 includes a reset fastener 31 and a reset spring 32, the reset fastener 31 has a circular cap-shaped reset button 311 and a fastening shaft 312, the inside of the reset button 311 is hollow and is disposed at an upper position of the circuit board 2, the reset button 311 protrudes upward from the upper cover 12, a reset waterproof cap 121 is further disposed at a position on the upper cover 12 corresponding to the reset button 311, the bottom of the reset button 311 is provided with an opening, the fastening shaft 312 extends downward from the top of the reset button 311 and passes through the circuit board 2, the reset spring 32 is sleeved on the shaft body of the fastening shaft 312, the upper end and the lower end of the reset spring 32 are respectively abutted to the top panel of the reset button 311 and the circuit board 2, and the reset spring 32 makes the reset fastener 31 have an upward lifting trend; the engagement shaft 312 extends downward into the base 4.

Further, the trip unit 5 includes a trip coil assembly 51, an armature assembly 52, a latch 53 and a cross arm 54, the trip coil assembly 51 is integrally disposed at one end of the base 4 in the length direction, the trip coil assembly 51 includes a coil frame 511 having a cylindrical shape and a coil 512 sleeved in the coil frame 511, and the trip coil assembly 51 is electrically connected to the circuit board 2; the coil frame 511 is disposed at the lower portion of the circuit board 2, the armature assembly 52 includes an armature body 521 and an armature spring 522 abutting against an end portion of the armature body 521, the armature body 521 is inserted into the coil frame 511, one end portion of the lock catch 53 is configured as a vertical U-shaped buckle 531 disposed vertically, an end portion of the armature body 521, far from the armature spring 522, is buckled into the vertical U-shaped buckle 531 of the lock catch 53, a horizontal U-shaped buckle 532 extending horizontally is further formed on the lock catch 53, a buckling shaft clamping groove 3121 is further formed on a shaft body of the buckling shaft 312 of the reset buckling member 31, and the vertical U-shaped buckle 531 is buckled and installed in the buckling shaft clamping groove 3121; the cross arm 54 is sleeved on a transverse U-shaped buckle 532 of the lock catch 53, and the buckling shaft 312 is also penetrated in the cross arm 54. It should be noted that: the trip coil assembly 51 cooperates with the reset assembly 3, when the coil 512 of the trip coil assembly 51 is energized, electromagnetic force is generated, the electromagnetic force overcomes the elastic force of the armature spring 522 to the armature body 521, so that the armature body 521 drives the transverse U-shaped buckle 532 on the lock catch 53 to disengage from the lock shaft clamping groove 3121 on the lock shaft 312, and at this time, the reset fastener 31 is wholly moved upwards under the drive of the reset spring 32; when the trip coil assembly 51 is powered off, the electromagnetic force is eliminated, and the armature spring 522 pushes the armature body 521 to move toward the reset clasp 31, so that the transverse U-shaped clasp 532 on the lock catch 53 is snapped into the clasp shaft clasp slot 3121 on the clasp shaft 312 again, thereby locking the reset clasp 31 and preventing it from moving.

Further, the cross arm 54 includes a block 541 and cross bars 542 formed on two sides of the block 541, the block 541 is hollow and forms a hollow cavity, the lateral U-shaped buckle 532 and the fastening shaft 312 are both inserted into the hollow cavity of the block 541, and a block sliding groove 5411 for horizontally sliding the lateral U-shaped buckle 532 is formed in the block 541; the two cross bars 542 are further provided with an N-end moving contact assembly 55 and an L-end moving contact assembly 56, wherein the N-end moving contact assembly 55 includes an N-end contact support plate 551 and an N-end moving contact 552, the N-end moving contact 552 is mounted at one end position of the N-end contact support plate 551 in the length direction, the other end of the N-end contact support plate 551 in the length direction is bent and extends upward through the circuit board 2, and similarly, the L-end moving contact assembly 56 also includes an L-end contact support plate 561 and an L-end moving contact 562, the L-end moving contact 562 is mounted at one end position of the L-end contact support plate 561 in the length direction, and the other end of the L-end contact support plate 561 in the length direction is bent and extends upward through the circuit board 2.

In this embodiment, the current transformer 6 is integrally provided in a ring structure, a current transformer through hole 61 is formed at a central position of the current transformer 6, an N-end output support plate 8 and an L-end output support plate 9 are inserted in the current transformer through hole 61, the lower parts of the N-end output support plate 8 and the L-end output support plate 9 are bent and extended and electrically connected with the power transmission wires of the output cables, specifically, please refer to fig. 1, a three-core cable 10 connected to the side of the housing 1 is also shown, the lower end part of the N-end output support plate 8 is an output end and is electrically connected with the N-wire of the three-core cable 10, and the lower end part of the L-end output support plate 9 is also an output end and is electrically connected with the L-wire of the three-core cable 10; the N-end output support plate 8 passes through the base 4 upwards and is mounted together with the base 4, the top end of the N-end output support plate 8 passes through the circuit board 2 and is positioned near the top end of the N-end contact support plate 551, the top end of the N-end output support plate 8 and the end of the N-end contact support plate 551 far away from the N-end moving contact 552 are electrically connected, the L-end output support plate 9 passes through the base 4 upwards and is mounted together with the base 4, the top end of the L-end output support plate 9 passes through the circuit board 2 and is positioned near the top end of the L-end contact support plate 561, and the top end of the L-end output support plate 9 and the end of the L-end contact support plate 561 far away from the N-end moving contact 552 are electrically connected.

Further, the pin unit 7 includes a pin base 71, an N-terminal pin 72, an L-terminal pin 73 and a ground pin 74 cooperatively mounted on the pin base 71, the ground pin 74 is disposed between the N-terminal pin 72 and the L-terminal pin 73, the N-terminal pin 72 and the L-terminal pin 73 are symmetrically disposed with respect to the ground pin 74, and the ground pin 74 is electrically connected to the ground wire of the three-wire cable 10; an N-terminal fixed contact 721 is further mounted on the top end of the N-terminal pin 72, an L-terminal fixed contact 731 is mounted on the top end of the L-terminal pin 73, the N-terminal fixed contact 721 is disposed at a lower position with respect to the N-terminal moving contact 552, the N-terminal fixed contact 721 and the N-terminal moving contact 552 form an on/off engagement, the L-terminal fixed contact 731 is disposed at a lower position with respect to the L-terminal moving contact 562, and the L-terminal fixed contact 731 and the L-terminal moving contact 562 form an on/off engagement.

Preferably, the pin base 71 is provided with pin grooves 711 through which the N-terminal pins 72, the L-terminal pins 73, and the ground pins 74 pass, three of the pin grooves 711 penetrate through the thickness direction of the pin base 71, and a socket base plate pin 712 for being engaged with the base 4 is further protruded from a surface of the pin base 71 opposite to the base 4.

With continued reference to fig. 1, 2 and reference to fig. 5, after the pin unit 7 is integrally inserted into the socket, the reset fastener 31 in the reset assembly 3 is pressed, the fastening shaft 312 moves downward, the reset spring 32 is compressed, the transverse U-shaped fastener 532 on the lock catch 53 is clamped into the fastening shaft clamping groove 3121 on the fastening shaft 312, when the reset fastener 31 is released, the reset spring 32 rebounds, so that the fastening shaft 312 drives the lock catch 53 and the cross arm 54 to integrally move, the cross arm 54, the N-end moving contact assemblies 55 and the L-end moving contact assemblies 56 located on the left and right sides thereof keep the upward movement trend, so that the N-end fixed contact 721 is connected with the N-end moving contact 552, and the L-end fixed contact 731 is connected with the L-end moving contact 562, thereby realizing the circuit conduction. When the circuit has leakage, the current transformer 6 generates induced current and outputs the induced current to the circuit board 2, the loop on the circuit board 2 is connected to enable the coil 512 in the trip coil assembly 51 to be electrified to generate a magnetic field, so that the armature body 521 overcomes the acting force of the armature spring 522 and moves towards a direction away from the buckling shaft 312, the armature body 521 drives the lock catch 53 to be separated from the buckling shaft 312, meanwhile, the lock catch 53 moves out of the stop sliding groove 5411, the cross arm 54 and the N-end moving contact assemblies 55 and L-end moving contact assemblies 56 positioned at the left side and the right side of the cross arm move downwards, the N-end fixed contact 721 is disconnected with the N-end moving contact 552, and the L-end fixed contact 731 is disconnected with the L-end moving contact 562, so that the circuit is disconnected and the leakage protection of the electrical appliance is completed.

In summary, the technical scheme provided by the utility model overcomes the defects in the prior art, successfully completes the task of the utility model, and faithfully honors the technical effects carried by the applicant in the technical effect column above.

Claims (8)

1. An improved earth leakage protection plug mechanism, comprising: a housing (1) with a housing cavity (11), a circuit board (2), a reset assembly (3), a base (4), a tripping unit (5), a current transformer (6) and a pin unit (7); the circuit board (2) is arranged at the upper position of the inner cavity (11) of the shell, the reset component (3) vertically penetrates through the circuit board (2), the base (4) is arranged at the lower position of the circuit board (2), the tripping unit (5) is integrally arranged on the base (4) and is electrically connected with the circuit board (2), the tripping unit (5) is used for cutting off the power supply when the electric appliance has the electric leakage condition, and the reset component (3) is used for providing reset force for the tripping unit (5); the current transformer (6) is arranged at a position on one side of the base (4) opposite to the tripping unit (5) and is electrically connected with the circuit board (2), the current transformer (6) body is transversely arranged along the horizontal direction, and the current transformer (6) is used for generating induced current when a circuit is in a leakage condition and driving the tripping unit (5) through the circuit board (2) to realize tripping action; the pin unit (7) is arranged at the lower position of the base (4) and penetrates out of the shell (1), the pin unit (7) is used for being inserted into a jack of a socket and is powered on, and the tripping unit (5) is electrically connected with the pin unit (7) and can be connected with and disconnected from the pin unit (7).

2. The structurally improved earth leakage protection plug mechanism of claim 1, wherein: the shell (1) is provided with an upper cover (12) and a base (13) which are mutually buckled and butted together, fixing screws (14) are respectively arranged at four corners of the base (13), and the fixing screws (14) penetrate through the base (13) and are screwed with the upper cover (12), so that the upper cover (12) and the base (13) are fixedly connected.

3. The structurally improved earth leakage protection plug mechanism of claim 2, wherein: the reset assembly (3) comprises a reset buckling piece (31) and a reset spring (32), the reset buckling piece (31) is provided with a round cap-shaped reset button (311) and a buckling shaft (312), the reset button (311) is hollow and arranged at the upper position of the circuit board (2), the reset button (311) protrudes upwards out of the upper cover (12), a reset waterproof rubber cap (121) is further arranged at the position, corresponding to the reset button (311), on the upper cover (12), the bottom of the reset button (311) is provided with an opening, the buckling shaft (312) extends downwards from the top of the reset button (311) and penetrates through the circuit board (2), the reset spring (32) is sleeved on the shaft body of the buckling shaft (312), and the upper end and the lower end of the reset spring (32) are respectively abutted to the board of the reset button (311) and the top surface of the circuit board (2); the fastening shaft (312) protrudes downward into the base (4).

4. A structurally improved earth leakage protection plug mechanism according to claim 3, characterized in that: the tripping unit (5) comprises a tripping coil assembly (51), an armature assembly (52), a lock catch (53) and a cross arm (54), wherein the tripping coil assembly (51) is integrally arranged at one end part position in the length direction of the base (4), the tripping coil assembly (51) comprises a coil frame (511) in a cylindrical structure and a coil (512) sleeved in the coil frame (511), and the tripping coil assembly (51) is electrically connected with a circuit on the circuit board (2); the coil rack (511) is arranged at the lower part of the circuit board (2), the armature assembly (52) comprises an armature body (521) and an armature spring (522) which is abutted against one end part of the armature body (521), the armature body (521) is penetrated into the interior of the coil rack (511), one end of the lock catch (53) is formed into a vertical U-shaped buckle (531) which is vertically arranged, one end part of the armature body (521) far away from the armature spring (522) is buckled in the vertical U-shaped buckle (531) of the lock catch (53), a horizontal U-shaped buckle (532) which horizontally extends is formed on the lock catch (53), a buckling shaft clamping groove (3121) is formed on the shaft body of the buckling shaft (312) of the reset buckling piece (31), and the vertical U-shaped buckle (531) is installed in the buckling shaft clamping groove (3121); the cross arm (54) is sleeved on a transverse U-shaped buckle (532) of the lock catch (53), and the buckling shaft (312) is also arranged in the cross arm (54) in a penetrating way.

5. The improved earth leakage protection plug mechanism of claim 4, wherein: the cross arm (54) comprises a block (541) and cross bars (542) formed on two sides of the block (541), the block (541) is hollow and forms a hollow cavity, the transverse U-shaped buckle (532) and the buckling shaft (312) are all arranged in the hollow cavity of the block (541) in a penetrating way, and the block (541) is provided with a block sliding groove (5411) for the transverse U-shaped buckle (532) to slide horizontally; the two cross bars (542) are further provided with an N-end moving contact assembly (55) and an L-end moving contact assembly (56), the N-end moving contact assembly (55) comprises an N-end contact support plate (551) and an N-end moving contact (552), the N-end moving contact (552) is mounted at one end position of the N-end contact support plate (551) in the length direction, the other end of the N-end contact support plate (551) is bent and extends upwards to pass through the circuit board (2), and similarly, the L-end moving contact assembly (56) also comprises an L-end contact support plate (561) and an L-end moving contact (562), the L-end moving contact (562) is mounted at one end position of the L-end contact support plate (561) in the length direction, and the other end of the L-end contact support plate (561) is bent and extends upwards to pass through the circuit board (2).

6. The improved earth leakage protection plug mechanism of claim 5, wherein: the current transformer (6) is integrally arranged in an annular structure, a current transformer through hole (61) is formed in the center of the current transformer (6), an N-end output support plate (8) and an L-end output support plate (9) are arranged in the current transformer through hole (61) in a penetrating mode, and the lower portions of the N-end output support plate (8) and the L-end output support plate (9) are bent and extended and are electrically connected with an electric energy transmission wire of an output cable; and N end output bracket board (8) upwards pass base (4) and with this base (4) cooperation installation together, and the top tip of this N end output bracket board (8) passes circuit board (2) and location setting are close to the top tip department of the top tip of N end contact bracket board (551), and the top tip of this N end output bracket board (8) and N end contact bracket board (551) keep away from the one end tip of N end moving contact (552) and realize electric connection, likewise, L end output bracket board (9) upwards pass base (4) and with this base (4) cooperation installation together, and the top tip of this L end output bracket board (9) passes circuit board (2) and location setting are in the position department of the top tip of being close to L end contact bracket board (561), and the top tip of this L end output bracket board (9) and the one end tip that L end contact bracket board (561) kept away from N end moving contact (552) realize electric connection.

7. The improved earth leakage protection plug mechanism of claim 5, wherein: the pin unit (7) comprises a pin base plate (71), an N-end pin (72), an L-end pin (73) and a grounding pin (74) which are matched and installed on the pin base plate (71), wherein the grounding pin (74) is arranged between the N-end pin (72) and the L-end pin (73), and the N-end pin (72) and the L-end pin (73) are symmetrically arranged relative to the grounding pin (74); an N-terminal static contact (721) is further mounted on the top end of the N-terminal pin (72), an L-terminal static contact (731) is mounted on the top end of the L-terminal pin (73), the N-terminal static contact (721) is disposed at a lower position relative to the N-terminal moving contact (552), the N-terminal static contact (721) and the N-terminal moving contact (552) form an on/off fit, the L-terminal static contact (731) is disposed at a lower position relative to the L-terminal moving contact (562), and the L-terminal static contact (731) and the L-terminal moving contact (562) form an on/off fit.

8. The improved earth leakage protection plug mechanism of claim 7, wherein: the pin base plate (71) is provided with pin clamping grooves (711) for the N-end pins (72), the L-end pins (73) and the grounding pins (74) to pass through, the three pin clamping grooves (711) penetrate through the thickness direction of the pin base plate (71), and socket base plate clamping pins (712) for being clamped on the base (4) are further arranged on the surface of one side, opposite to the base (4), of the pin base plate (71) in a protruding mode.