CN201185273Y

CN201185273Y - Power-supply plug with cable earth leakage protection function

Info

Publication number: CN201185273Y
Application number: CNU2008200002596U
Authority: CN
Inventors: 吴立华
Original assignee: 苏春文
Priority date: 2008-01-21
Filing date: 2008-01-21
Publication date: 2009-01-21
Anticipated expiration: 2018-01-21

Abstract

The utility model relates to a power plug with the function of cable creepage protection, which is characterized in that the power plug consists of an outer shell component, a power connecting device, a disconnection device, a glutting and a creepage protection circuit used to detect the cable creepage of power output. The outer shell component consists of an upper cover, a lower cover I and a lower cover II; a power live wire pin, a neutral line pin and an earth wire pin are installed at the bottom of the lower cover I, with one end exposed outside the lower cover I and the other end fixed in the lower cover I; in addition, the power live wire pin, the neutral line pin and the earth wire pin are connected with the live wire and the neutral line of the power cable through the power connecting device arranged in the lower cover I and the creepage protection circuit used to detect the cable creepage of the power output. When the cable connected with the load suffers from creepage, the creepage protection circuit quickly cut off the connected between the power and the load through the disconnection mechanism, so as to protect personal and property safety.

Description

A kind of attaching plug with cable leakage defencive function

Technical field

The utility model relates to a kind of attaching plug (being called for short LCDI) with cable leakage defencive function, refers to a kind of attaching plug with cable leakage defencive function that is installed on the household electrical appliance such as air-conditioning, refrigerator especially.

Background technology

Universal day by day along with household electrical appliance, the safe in utilization of household electrical appliance is subject to people's attention day by day.At present, the electrical prong structure that people often use is all fairly simple, and function is also more single.

The attaching plug that people often use mainly is to be made of housing and two or three plug base pins that are installed on the housing, pin one end on the plug exposes the outside at housing, and the other end is connected by power firestreak, the neutral line, the ground wire input on the control circuit board in lead and the household electrical appliance.When using household electrical appliance, only need pin with plug to insert in supply socket or the common earth leakage protective socket hole and get final product.The effect of this attaching plug just is incorporated into the power supply in the socket on the household electrical appliance wiring board; make its charged work; and for the leak current fault between plug outlet side live wire, the neutral line, ground wire; and the infringement that causes to household electrical appliance of the short trouble of the plug outlet side live wire and the neutral line without any protective effect, the safeguard protection performance is relatively poor.Therefore, press for a kind of have cable leakage defencive function, easy to operate, attaching plug that the safeguard protection performance is good on the market.

Summary of the invention

In order to solve the problem that existing attaching plug function singleness, safeguard protection performance are poor, can't meet the need of market, the purpose of this utility model provide a kind of safeguard protection performance strong, can detect the feed cable leak current fault in real time and the attaching plug that is connected with load of in time cutting off the electricity supply with cable leakage defencive function.

For achieving the above object, the utility model is taked following design: a kind of attaching plug with cable leakage defencive function is characterized in that: it by casing assembly, electrical power connection device, trip gear, insert and the leakage protection circuit that is used to detect the cable leakage fault of power supply output constitutes;

Described casing assembly comprises that loam cake, lower cover I and lower cover II form, and a dividing plate is arranged in loam cake, and loam cake and dividing plate and lower cover I form the upper cavity of a sealing; Loam cake and dividing plate and lower cover II form the lower chamber of a sealing, also are provided with reset button, testing button and power supply indicator cover at last exterior surface;

Described electrical power connection device comprises power firestreak pin, neutral line pin, earth pin, a pair of movable contact spring and a feed cable that is used to be connected load, power firestreak pin, neutral line pin, earth pin are installed in the bottom of lower cover I, head exposes in lower cover I outside, power firestreak, the neutral line pin tails riveting respectively have fixed contact, the afterbody riveting of earth pin has ground strip, the front end of a pair of movable contact spring respectively riveting moving contact is arranged, and corresponding with the fixed contact of power firestreak pin, neutral line pin tails respectively, constitute two pairs of contacts that can contact/disconnect;

The afterbody of a pair of movable contact spring, ground strip stretches out from the reservation hole of dividing plate and lower cover I junction respectively, the terminals of feed cable live wire, the neutral line and ground wire are welded on respectively in the afterbody hole of the afterbody gap of movable contact spring and ground strip, and the lower chamber that places dividing plate and lower cover II to form;

Described trip gear comprises pull bar, is installed in pull-rod spring, dropout plate, the supporting plate of pull bar bottom and dropout iron core and the dropout spring that places tripping coil;

The hole that the top of pull bar is passed on the wiring board links to each other with reset button, is provided with a groove at the middle part of pull bar and contacts with slideway on the lower cover I pedestal, also is provided with two shoulder arms at the middle part of pull bar, and the bottom of pull bar is connected with pull-rod spring;

Be provided with two hooks at the top of dropout plate, corresponding with pull bar middle part two shoulder arms respectively, can catch on or throw off, there is a vertical draw-in groove to be connected at the middle part of dropout plate with the annular groove of dropout iron core one end, the bottom of dropout plate also is provided with the bottom that a boss is connected with the circular recess of supporting plate bottom and places lower cover I simultaneously, and the supporting plate two side arms places the below of the moving contact on a pair of movable contact spring respectively;

Described inserting places between tripping coil, lower cover I and power firestreak, the neutral line pin, and two fixed mounts are arranged at the top of inserting, and two inserted sheets of inserting are arranged at the bottom; Two location notchs of tripping coil below are separately fixed on two fixed mounts at the top of inserting, the both sides of power firestreak, neutral line pin respectively have two draw-in grooves to be embedded in respectively on two boss of lower cover I bottom, two inserted sheets of inserting bottom inserting insert respectively in two square holes of lower cover I bottom, in order to difference fixed power source live wire pin, neutral line pin;

Weld in the circuit board the top that is built-in with the tripping coil of dropout iron core and dropout spring; and the leakage protection circuit of the cable leakage fault by detecting power supply output is connected with live wire, the neutral line on the wiring board; there is being a pair of aperture to be riveted on respectively on two reference columns of lower cover I on a pair of movable contact spring; extend a support arm respectively in a pair of aperture one side; support arm is welded on respectively on two holes of wiring board, with thinking the wiring board power supply.

Described printing leakage protection circuit in the circuit board is by controllable silicon, diode, electric capacity, resistance, connecting line and be built-in with the dropout iron core and the tripping coil of dropout spring is formed; The silicon controlled control utmost point is continuous with the metal-shielded wire in the feed cable that is connected load by resistance, connecting line, tripping coil and controllable silicon, two ends, diode polyphone back are connected on respectively on the live wire and the neutral line of reset switch back, form a tripping coil work loop;

The upper cavity that described printing leakage protection circuit in the circuit board places loam cake and dividing plate and lower cover I to form.

The utility model has the advantages that: easy to use, simple to operate, dependable performance, can detect the leak current fault that the attaching plug cable causes because of reasons such as aging or breakages real-time, and the output of the plug of in time cutting off the electricity supply apace, avoid cable leakage because of attaching plug to the damage that power consumption equipment caused effectively, and the electric shock injury that human body is caused because of electric leakage.

Description of drawings

Fig. 1 is the utility model three-dimensional appearance structural representation;

The position of each assembly concerns schematic diagram to Fig. 2 behind the lower cover II for the utility model is removed;

Fig. 3 is the three-dimensional decomposition texture schematic diagram of the utility model;

Fig. 4 A is the utility model lower cover I structural representation;

Fig. 4 B is that the A-A of Fig. 4 A is to cross-sectional view;

Fig. 5 for the utility model be fixed in lower cover I and the lower cover II each module position concern schematic diagram;

Fig. 6 is that the A-A of Fig. 5 is to cross-sectional view;

Fig. 7 is that the B-B of Fig. 5 is to cross-sectional view;

Fig. 8 A is the utility model when normally using, power supply input and output side electric power connection status cross-sectional view;

Fig. 8 B is that the A-A of Fig. 8 A is to cross-sectional view;

Fig. 9 A is that the utility model detects deenergization input and output side electric power connection status cross-sectional view after the cable leakage fault;

Fig. 9 B is that the A-A of Fig. 9 A is to cross-sectional view;

Figure 10 is the utility model cable leakage protective circuit physical circuit figure.

Embodiment

As Fig. 1, Fig. 2, Fig. 3, shown in Figure 10; the disclosed a kind of attaching plug of the utility model with cable leakage defencive function, mainly by casing assembly, electrical power connection device, trip gear, insert and the leakage protection circuit that is used to detect the cable leakage fault of power supply output constitutes.

As shown in Figure 1, described casing assembly is combined by loam cake 1, lower cover I 2 and lower cover II 3; Be provided with reset button 17, testing button 18 and power supply indicator cover 19 at loam cake 1 outer surface;

As Fig. 2, Fig. 3, Fig. 9 A, Fig. 9 B, shown in, a dividing plate 14 is arranged in loam cake 1, loam cake 1 and dividing plate 14 and lower cover I 2 form the upper cavity of a sealing; Loam cake 1 forms a lower chamber that seals with dividing plate 14 and lower cover II 3; Electrical power connection device comprises power firestreak pin 6, neutral line pin 5, earth pin 4, a pair of

movable contact spring

50,49 and a feed cable 65 that is used to be connected load, power firestreak pin 6, neutral line pin 5, earth pin 4 are installed in the bottom of lower cover I 2, and head exposes the outside at lower cover I 2; The afterbody of power firestreak,

neutral line pin

6,5 riveting respectively has fixed

contact

46,45, the afterbody riveting of earth pin 4 has ground strip 7, the front end of a pair of

movable contact spring

50,49 respectively riveting moving

contact

56,55 is arranged, and corresponding with the fixed

contact

46,45 of power firestreak pin 6, neutral line pin 5 afterbodys respectively, constitute two pairs of contacts that can contact/disconnect;

As Fig. 2, shown in Figure 3, the afterbody of a pair of

movable contact spring

50,49, ground strip 7 stretches out from the reservation hole 11,10,12 of dividing plate 14 and lower cover I 2 junctions respectively, the live wire of feed cable 65, the neutral line,

ground wire terminals

67,66,68 are welded on respectively in the afterbody hole of the

afterbody gap

58,57 of

movable contact spring

50,49 and ground strip 7, and the lower chamber that places dividing plate 14 and lower cover II 3 to form;

Shown in Fig. 3, Fig. 9 A, Fig. 9 B, trip gear comprises pull bar 28, is installed in pull-rod spring 30, dropout plate 29, the supporting plate 59 of pull bar bottom and dropout iron core 36 and the dropout spring 37 that places tripping coil 38; The hole 27 that the top of pull bar 28 is passed on the wiring board 22 links to each other with reset button 17, be provided with a groove 31 contacts with slideway 61 on lower cover I 2 pedestals 62 at the middle part of pull bar 28, also be provided with two shoulder arms 32 at the middle part of pull bar 28, the bottom of pull bar 28 is connected with pull-rod spring 30; Be provided with two hooks 33 at the top of dropout plate 29, corresponding with the middle part two shoulder arms 32 of pull bar 28 respectively, can catch on or throw off, there is a vertical draw-in groove 34 to be connected at the middle part of dropout plate 29 with the annular groove of dropout iron core 36 1 ends, the bottom of dropout plate 29 also is provided with the bottom that a boss 35 is connected with the circular recess 60 of supporting plate 59 bottoms and places lower cover I 2 simultaneously, and supporting plate 59 two side arms place the below of the moving

contact

56,55 of a pair of

movable contact spring

50,49 respectively;

As Fig. 3, Fig. 4 A, Fig. 4 B, Fig. 5, shown in Figure 7, inserting 41 places between tripping coil 38, lower cover I 2 and power firestreak, the

neutral line pin

6,5, at 41 the top of inserting two fixed mounts 42 is arranged, and two inserted

sheets

43,44 of inserting are arranged at the bottom; Two location notchs 40 of tripping coil 38 belows are separately fixed on two fixed mounts 42 at 41 tops of inserting, the both sides of power firestreak,

neutral line pin

6,5 respectively have two draw-in

grooves

48,47 to be embedded in respectively on two

boss

71,70 of lower cover I 2 bottoms, two inserted

sheets

43,44 of inserting of 41 bottoms inserted insert respectively in the lower cover I 2 bottom

square holes

73,72, in order to fixed power source live wire pin 6, neutral line pin 5 respectively;

Shown in Fig. 3, Fig. 5, Fig. 9 A, Fig. 9 B, the top that is built-in with the tripping coil 38 of dropout iron core 36 and dropout spring 37 is welded on the wiring board 22, and wiring board 22 is placed on the pedestal 62 of lower cover I 2, and is fixed on the lower cover I 2 by two screws 24; There is being a pair of

aperture

54,53 to be riveted on respectively on two

reference columns

64,63 of lower cover I 2 on a pair of

movable contact spring

50,49, extend a

support arm

52,51 respectively in a pair of

aperture

54,53 1 sides,

support arm

52,51 is welded on respectively on two holes 26 of wiring board 22, with thinking the wiring board power supply.

As Fig. 9 A, Fig. 9 B, shown in Figure 10, the work display circuit of attaching plug is connected and is constituted with resistance R 4, diode D by LED, and the positive pole of LED is connected on the live wire HOT, and negative pole is connected between resistance R 4 and the resistance R 5; LED is fixed on the pedestal 39 behind the tripping coil 38, LED two pins are welded on the wiring board 22, its top sees through the power supply indicator cover 19 that a circular hole 23 on the wiring board 22 faces loam cake 1 outer surface, is used for the operating state of display power supply plug.

Shown in Fig. 3, Fig. 9 A, Fig. 9 B, below the testing button 18 of loam cake 1 outer surface, also be provided with U-shaped copper pin 20 and test spring 21, analogue test switch TEST is formed by two testing weld pads and U-shaped copper pin 20 in the below of corresponding in the circuit board U-shaped copper pin 20; As Fig. 2, shown in Figure 10, the end of this analogue test switch TEST links to each other with the live wire HOT of reset switch RESET back by resistance R 1, the connecting line 25 of the other end by stretching out from the reservation hole 13 of dividing plate 14 and lower cover I 2 junctions is connected on the metal-shielded wire 69 in the feed cable 65 of load.When pushing testing button 18, when it is moved down, U-shaped copper pin 20 makes two testing weld pad conductings, power supply outlet side live wire HOT is by resistance R 1, R2, the control utmost point of controllable silicon SCR, negative electrode, diode D constitutes the loop to neutral line WHITE, produce the simulation leakage current, and triggering controllable silicon SCR conducting, tripping coil 38 (SOL) gets electric and produces magnetic field, built-in dropout iron core wherein moves under the magnetic field force effect, pulling dropout plate 29, two hooks 33 at dropout plate 29 tops are thrown off from the middle part two shoulder arms 32 of pull bar 28 simultaneously, pull bar 28 pops up under the effect of pull-rod spring 30, dropout plate 29 and supporting plate 59 fall simultaneously, place a pair of movable contact spring 50 of supporting plate 59 two side arms top, 49 fall, and are riveted on a pair of movable contact spring 50, moving contact 56 on 49,55 be riveted on power firestreak, neutral line pin 6, fixed contact 46 on 5,45 disconnect; Thereby cut off the electricity supply and being connected of load.

Shown in Fig. 3, Fig. 9 A, Fig. 9 B, loam cake 1 outer surface also is provided with the waterproof jacket 15 of reset button 17, testing button 18, and this waterproof jacket 15 is riveted in the loam cake 1 by pressing plate 16; Also be provided with seal groove 8 on the edge of lower cover I 2, the corresponding Inlaid strip 9 that is provided with projection on the edge of lower cover II 3 is in the seal groove 8 that this Inlaid strip 9 inserts on the lower cover I 2.

Figure 10 is the utility model cable leakage protective circuit physical circuit figure.As shown in the figure, this leakage current detection protection circuit is made up of reset switch RESET, analogue test switch TEST, controllable silicon SCR, diode D, capacitor C, resistance R 1, R2, R3, R4, R5, LED, tripping coil 38 (SOL) and piezo-resistance RV1 and RV2; The control utmost point of controllable silicon SCR is continuous with the metal-shielded wire 69 on the feed cable 65 that is connected load by resistance R 2, tripping coil 38 (SOL) is connected on respectively on the live wire 67 and the neutral line 66 of reset switch RESET back with controllable silicon SCR, two ends, diode D polyphone back, form a tripping coil 38 (SOL) work loop, wherein diode D is used for the Leakage Current of detection streamer live wire 67; Resistance R 4, R5 are used for the Leakage Current of the detection streamer neutral line 66, and diode D and resistance R 4, LED are formed the work display circuit again.

Operation principle of the present utility model is shown in Fig. 6, Fig. 8 A, Fig. 8 B: after pressing reset button 17 (RESET), pull bar 28 compresses pull-rod springs 30 and moves downward, the middle part two shoulder arms 32 of pull bar 28 hold up two hooks 33 at dropout plate 29 tops, the boss 35 of dropout plate 29 bottoms has dragged supporting plate 59 again, place a pair of

movable contact spring

50,49 of supporting plate 59 two side arms tops to be raised, be riveted on the moving

contact

56,55 on a pair of

movable contact spring

50,49 and fixed

contact

46,45 closure simultaneously that is riveted on power firestreak, the

neutral line pin

6,5; Thereby energized is connected with load LOAD's.

When the live wire in the cable 65 67 has Leakage Current, the metal-shielded wire 69 that is wrapped in live wire 67 outsides detects Leakage Current, through R2, the control utmost point of controllable silicon SCR, diode D in the cable 65 the neutral line 66 and constitute the loop, the controllable silicon SCR conducting that is triggered, electric current from live wire 67 through tripping coil 38 (SOL), the SCR anode, negative electrode, diode D is to the neutral line 66, tripping coil 38 (SOL) gets electric generation magnetic field, the action of dropout iron core, as Fig. 9 A, shown in Fig. 9 B, pulling dropout plate 29, two hooks 33 at dropout plate 29 tops are thrown off from the middle part two shoulder arms 32 of pull bar 28 simultaneously, pull bar 28 pops up under the effect of pull-rod spring 30, dropout plate 29 and supporting plate 59 fall simultaneously, place a pair of movable contact spring 50 of supporting plate 59 two side arms top, 49 fall, and are riveted on a pair of movable contact spring 50, moving contact 56 on 49,55 be riveted on power firestreak, neutral line pin 6, fixed contact 46 on 5,45 disconnect; Thereby cut off the electricity supply and being connected of load LOAD.

When the neutral line in the cable 65 66 has Leakage Current, the metal-shielded wire 69 that is wrapped in the neutral line 66 outsides detects Leakage Current, through R2, the control utmost point of controllable silicon SCR, resistance R 4, R5 in the cable 65 live wire 67 and constitute the loop, the controllable silicon SCR conducting that is triggered, electric current from live wire 67 through tripping coil 38 (SOL), the SCR anode, negative electrode, diode D is to the neutral line 66, tripping coil 38 (SOL) gets electric generation magnetic field, the action of dropout iron core, as Fig. 9 A, shown in Fig. 9 B, pulling dropout plate 29, two hooks 33 at dropout plate 29 tops are thrown off from the middle part two shoulder arms 32 of pull bar 28 simultaneously, pull bar 28 pops up under the effect of pull-rod spring 30, dropout plate 29 and supporting plate 59 fall simultaneously, place a pair of movable contact spring 50 of supporting plate 59 two side arms top, 49 fall, and are riveted on a pair of movable contact spring 50, moving contact 56 on 49,55 be riveted on power firestreak, neutral line pin 6, fixed contact 46 on 5,45 disconnect; Thereby cut off the electricity supply and being connected of load LOAD.

The above is specific embodiment and the design principle that the utlity model has the attaching plug of cable leakage defencive function, and is any based on the equivalent transformation on the technical solutions of the utility model basis, all belongs within the protection range of the present utility model.

Claims

1, a kind of attaching plug with cable leakage defencive function is characterized in that: it by casing assembly, electrical power connection device, trip gear, insert and the leakage protection circuit that is used to detect the cable leakage fault of power supply output constitutes;

Described casing assembly comprises that loam cake (1), lower cover I (2) and lower cover II (3) form, and a dividing plate (14) is arranged in loam cake (1), and loam cake (1) forms a upper cavity that seals with dividing plate (14) and lower cover I (2); Loam cake (1) forms a lower chamber that seals with dividing plate (14) and lower cover II (3), also is provided with reset button (17), testing button (18) and power supply indicator cover (19) at last exterior surface;

Described electrical power connection device comprises power firestreak pin (6), neutral line pin (5), earth pin (4), a pair of movable contact spring (50,49), with a feed cable (65) that is used to be connected load, power firestreak pin (6), neutral line pin (5), earth pin (4) is installed in the bottom of lower cover I (2), head exposes in lower cover I (2) outside, power firestreak, neutral line pin (6,5) afterbody respectively riveting fixed contact (46 is arranged, 45), the afterbody riveting of earth pin (4) has ground strip (7), at a pair of movable contact spring (50,49) front end riveting respectively has moving contact (56,55), and respectively with power firestreak pin (6), the fixed contact (46 of neutral line pin (5) afterbody, 45) corresponding, constitute two pairs of contacts that can contact/disconnect;

The afterbody of a pair of movable contact spring (50,49), ground strip (7) stretches out from the reservation hole (11,10,12) of dividing plate (14) and lower cover I (2) junction respectively, the live wire of feed cable (65), the neutral line, ground wire terminals (67,66,68) are welded on respectively in the afterbody hole of the afterbody gap (58,57) of movable contact spring (50,49) and ground strip (7), and the lower chamber that places dividing plate (14) and lower cover II (3) to form;

Described trip gear comprises pull bar (28), is installed in pull-rod spring (30), dropout plate (29), the supporting plate (59) of pull bar bottom and dropout iron core (36) and the dropout spring (37) that places tripping coil (38);

The hole (27) that the top of pull bar (28) is passed on the wiring board (22) links to each other with reset button (17), be provided with a groove (31) contacts with slideway (61) on lower cover I (2) pedestal (62) at the middle part of pull bar (28), also be provided with two shoulder arms (32) at the middle part of pull bar (28), the bottom of pull bar (28) is connected with pull-rod spring (30);

Be provided with two hooks (33) at the top of dropout plate (29), corresponding with the middle part two shoulder arms (32) of pull bar (28) respectively, can catch on or throw off, there is a vertical draw-in groove (34) to be connected at the middle part of dropout plate (29) with the annular groove of dropout iron core (36) one ends, the bottom of dropout plate (29) also is provided with the bottom that a boss (35) is connected with the circular recess (60) of supporting plate (59) bottom and places lower cover I (2) simultaneously, and supporting plate (59) two side arms places the below of the moving contact (56,55) of a pair of movable contact spring (50,49) respectively;

Described inserting (41) places between tripping coil (38), lower cover I (2) and power firestreak, the neutral line pin (6,5), at the top of insert (41) two fixed mounts (42) arranged, and two inserted sheets of inserting (43,44) are arranged at the bottom; Two location notchs (40) of tripping coil (38) below are separately fixed on two fixed mounts (42) at (41) top of inserting, the both sides of power firestreak, neutral line pin (6,5) respectively have two draw-in grooves (48,47) to be embedded in respectively on two boss (71,70) of lower cover I (2) bottom, two inserted sheets of inserting (43,44) of (41) bottom inserted insert respectively in lower cover I (2) the bottom square hole (73,72), in order to fixed power source live wire pin (6), neutral line pin (5) respectively;

The top that is built-in with the tripping coil (38) of dropout iron core (36) and dropout spring (37) is welded on the wiring board (22); and the leakage protection circuit of the cable leakage fault by detecting power supply output and the live wire on the wiring board; the neutral line is connected; at a pair of movable contact spring (50; a pair of aperture (54 is arranged 49); 53) be riveted on two reference columns (64 of lower cover I (2) respectively; 63) on; at a pair of aperture (54; 53) side is extended a support arm (52 respectively; 51); support arm (52; 51) be welded on respectively on two holes (26) of wiring board (22), with thinking the wiring board power supply.

2, the attaching plug with cable leakage defencive function according to claim 1 is characterized in that: the described leakage protection circuit that is printed on the wiring board (22) is made up of controllable silicon (SCR), diode (D), electric capacity (C), resistance (R2, R3, R4, R5), connecting line (25), the tripping coil (38) that is built-in with dropout iron core (36) and dropout spring (37); The control utmost point of controllable silicon (SCR) is continuous with the metal-shielded wire (69) on the feed cable that is connected load (65) by resistance (R2), tripping coil (SOL) is connected on respectively on the live wire (HOT) and the neutral line (WHITE) of reset switch (RESET) back with controllable silicon (SCR), two ends, diode (D) polyphone back, forms a tripping coil (SOL) work loop;

The upper cavity that the described leakage protection circuit that is printed on the wiring board (22) places loam cake (1) and dividing plate (14) and lower cover I (2) to form.

3, the attaching plug with cable leakage defencive function according to claim 1 and 2, it is characterized in that: also be provided with U-shaped copper pin (20) and test spring (21) below the testing button (18) of described loam cake (1) outer surface, the below of corresponding in the circuit board U-shaped copper pin (20) has two testing weld pads and U-shaped copper pin (20) to form analogue test switch (TEST);

One end of this analogue test switch (TEST) links to each other with the live wire (HOT) of reset switch (RESET) back by resistance (R1), and the interior metal-shielded wire (69) of the other end and the feed cable that is connected load (65) is connected.

4, the attaching plug with cable leakage defencive function according to claim 3, it is characterized in that: described leakage protection circuit also comprises a work display circuit, this work display circuit is by light-emitting diode (LED) formation of connecting with described resistance (R4), diode (D), the positive pole of light-emitting diode (LED) is connected on the live wire (HOT), and negative pole is connected between resistance (R4) and the resistance (R5);

Described light-emitting diode (LED) is fixed on the pedestal (39) behind the tripping coil (38), light-emitting diode (LED) two pins are welded on the wiring board (22), and its top faces the power supply indicator cover (19) of loam cake (1) outer surface through the circular hole (23) on the wiring board (22).

5, the attaching plug with cable leakage defencive function according to claim 4 is characterized in that: described wiring board (22) is placed on the pedestal (62) of lower cover I (2), and is fixed on the lower cover I (2) by two screws (24);

Go up a connecting line (25) of welding at wiring board (22), it stretches out from the reservation hole (13) of dividing plate (14) and lower cover I (2) junction, and is connected with metal-shielded wire (69) in the feed cable (65).

6, the attaching plug with cable leakage defencive function according to claim 5; it is characterized in that: also be provided with the waterproof jacket (15) of reset button (17), testing button (18) at described loam cake (1) outer surface, this waterproof jacket (15) is riveted in the loam cake (1) by pressing plate (16).

7, the attaching plug with cable leakage defencive function according to claim 6; it is characterized in that: on the edge of described lower cover I (2), also be provided with seal groove (8); the corresponding Inlaid strip (9) that is provided with projection on the edge of lower cover II (3) is in the seal groove (8) on this Inlaid strip (9) insertion lower cover I (2).