CN201303151Y

CN201303151Y - Leakage protection socket

Info

Publication number: CN201303151Y
Application number: CNU2008201100844U
Authority: CN
Inventors: 蔡静; 林雪莲
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-08-20
Filing date: 2008-08-20
Publication date: 2009-09-02
Anticipated expiration: 2018-08-20

Abstract

The utility model discloses a novel leakage protection socket which is characterized in that when a reset button is pressed, a linkage test button is moved simultaneously; an elastic metal sheet is arranged below the test button, and a testing resistor is arranged below the elastic metal sheet; one end of the elastic metal sheet is arranged below the test button, and the other end of the elastic metal sheet is connected with a power supply live wire or a power supply naught wire which passes through a differential transformer; one end of the testing resistor is hung below the elastic metal sheet, and the other end of the testing resistor is connected with a power supply naught wire of a power supply input end; when the reset button is in tripping state or reset state, the testing resistor is not contacted with the elastic metal sheet; and when the reset button is pressed, the testing resistor is contacted with the elastic metal sheet; after the power supply input end is well connected with the power cord in the wall, and the reset button is pressed while linking the test button, whether the leakage protection socket still has the leakage protection function is automatically tested the first time by the test button, and the test result is displayed as well.

Description

Earth leakage protective socket

Technical field

The utility model relates to and a kind ofly having by pushing reset button interlock testing button, detects whether end-of-life and show the new type electric leakageproof socket of testing result of earth leakage protective socket by testing button automatically in the very first time.

Background technology

Along with the continuous development of earth leakage protective socket industry, people require more and more higher to the safety in utilization of earth leakage protective socket.Hope when its inner components and parts lost efficacy the forfeiture creepage protection function when its end-of-life, can in time be reminded the user in the use of earth leakage protective socket, change new product.

Yet; common in the market earth leakage protective socket; not only do not have life end checking function; and, when its end-of-life, concerning the user without any prompt facility; its reset button still can reset; the single-phase three-wire power supply output plughole of the load output of earth leakage protective socket and receptacle face still has power supply output, misleads the user and continues to use, and security reliability is poor.When leaky occurring, this earth leakage protective socket does not have any protective effect, very easily causes the get an electric shock generation of dead accident of user.

Summary of the invention

In view of the foregoing; main purpose of the present utility model provides a kind of by pushing reset button interlock testing button, detects whether end-of-life and show the new type electric leakageproof socket of testing result of earth leakage protective socket by testing button automatically in the very first time.After the power input of this earth leakage protective socket and the power line in the wall connect; when pushing reset button, automatically whether earth leakage protective socket is still had creepage protection function by testing button in the very first time and detect and show testing result.When the earth leakage protective socket inner member is intact when not having end-of-life, can set up correct reset mechanism automatically, reset button is resetted, after resetting, the power supply output indicator is bright, shows that earth leakage protective socket can operate as normal, and power supply output is arranged; When earth leakage protective socket inner member fault or open circuit or short circuit are current leakage jack life termination; the utility model resets by automatic prevention reset button and points out user this earth leakage protective socket end-of-life; make the single-phase three-wire power supply output plughole of the load output of earth leakage protective socket and receptacle face all not have power supply output, avoid when leaky occurs because of earth leakage protective socket end-of-life but it still has power supply to export the get an electric shock generation of dead accident of the user who causes.

For achieving the above object; the utility model is by the following technical solutions: a kind of earth leakage protective socket; it comprises housing, be installed in the reset button of surface of shell, testing button, be installed in the earth leakage protective socket realized in the housing and have/control circuit board of non-transformer output; on this control circuit board, be provided with the differential differentiating transformer that at least one pair of elasticity power supply is imported sheet metal, a pair of power supply output sheet metal, is used to detect leakage current, it is characterized in that:

When described reset button startup work, whether the interlock testing button still has creepage protection function to earth leakage protective socket is earlier detected, and detecting successfully afterwards, reset button just can reset;

Below described testing button, be provided with an elastic sheet metal, below elastic sheet metal, be provided with a test resistance;

One end of elastic sheet metal is positioned at the below of testing button, and the other end links to each other with power firestreak that passes differential differentiating transformer or zero-power line; The unsettled below that is positioned at elastic sheet metal of one end of test resistance, the other end links to each other with the zero-power line of power input;

When reset button was trip status and reset mode, test resistance did not contact with elastic sheet metal; When reset button was pressed, test resistance contacted with elastic sheet metal.

After the power line in the utility model power input and the wall connects; when pushing reset button, drive testing button; automatically whether earth leakage protective socket is still had creepage protection function by testing button in the very first time and detect and show testing result, detect the success that resets of successful reset button.The utility model fail safe is good, and is safe and reliable, and function is complete, and long service life reduces and uses element, carves the consumed power situation of saving that detects when not required constantly; Working stability, reliable, safety; Has automatic life end checking function; Anti-lightning strike function.

Description of drawings

Fig. 1 is the three-dimensional decomposition texture schematic diagram of the utility model;

Fig. 2 is a front view of the present utility model;

Fig. 3 is the front view after the utility model removes loam cake;

Fig. 4-1, Fig. 4 the-the 2nd, the annexation schematic diagram between the utility model power supply input sheet metal, power supply output sheet metal, the elastic sheet metal;

Fig. 5 is that each module position concerns schematic diagram on the utility model circuit board;

Fig. 6-the 1st, the utility model three-dimensional decomposition texture schematic diagram of mechanical device that resets/trip;

Fig. 6-the 2nd, the utility model another kind three-dimensional decomposition texture schematic diagram of mechanical device that resets/trip;

Fig. 7-the 1st, the B-B partial sectional view of Fig. 3, each module position concerns schematic diagram during the output of socket initial condition non-transformer;

Fig. 7-the 2nd, the B-B partial sectional view of Fig. 3, be pressed moment each module position of reset button concerns schematic diagram;

Fig. 7-the 3rd, the B-B partial sectional view of Fig. 3, reset button resets, and supply socket is working properly when power supply output is arranged, and each module position concerns schematic diagram;

Each module position concerned schematic diagram when Fig. 7-the 4th, the B-B partial sectional view of Fig. 3, testing button were pressed the output of reset button dropout supply socket non-transformer;

Fig. 8-the 1st, the C-C partial sectional view of Fig. 3, after reset button resetted, each module position concerned schematic diagram when supply socket had power supply output;

Fig. 8-the 2nd, the C-C partial sectional view of Fig. 3 is pushed testing button, and reset button is threaded off, and each module position did not concern schematic diagram when supply socket had power supply output;

Fig. 9-the 1st, the A-A partial sectional view of Fig. 3, during the reset button trip status, the startup that resets/coupling cock view;

Fig. 9-the 2nd, the A-A partial sectional view of Fig. 3, the moment that reset button is pressed, the startup that resets/coupling cock view;

Fig. 9-the 3rd, the A-A partial sectional view of Fig. 3, during the reset button reset mode, the startup that resets/coupling cock view;

Figure 10-the 1st, the utility model embodiment one presses reset button interlock testing button and automatically whether earth leakage protective socket is still had the control circuit physical circuit figure that creepage protection function detected and showed testing result in the very first time after the power input of earth leakage protective socket and the power line in the wall connect;

Figure 10-the 2nd, the utility model embodiment two control circuit physical circuit figure;

Figure 10-the 3rd, the utility model embodiment three control circuit physical circuit figure;

Figure 10-the 4th, the utility model embodiment four control circuit physical circuit figure.

Embodiment

As shown in Figure 1, the disclosed new type electric leakageproof socket of the utility model mainly by housing, be installed in the earth leakage protective socket realized in the housing and have/control circuit board 18 of non-transformer output constitutes.

Described housing is combined by the middle layer bracket 3 and the base 4 of loam cake 2, insulation; Between the middle layer bracket 3 of loam cake 2 and insulation, metal ground connection mounting panel 1 is installed; Between middle layer bracket 3 that insulate and base 4, control circuit board 18 is installed.

As shown in Figure 1 and Figure 2, on loam cake 2, have power

supply output plughole

5,6, reset button hole 8-A, testing button hole 7-A and status indicator lamp hole 30-A.Reset button (RESET) 8 and testing button (TEST) 7 are installed in reset button hole 8-A and testing button hole 7-A, and reset button 8 and testing button 7 pass metal ground connection mounting panel 1 and insulation middle layer bracket 3 and contact with assembly on the circuit board 18.Be provided with four grab 2-A in the side of loam cake 2, be used for fixing, loam cake 2 is fixed with base 4 be in the same place with the draw-in groove 4-B of base 4 inboards.

Metal ground connection mounting panel 1 links to each other with the earth by earthing screw 13-A, lead between the middle layer bracket 3 of loam cake 2 and insulation.On metal ground connection mounting panel 1, locate to be provided with

ground connection blade

11,12 with the ground hole of loam cake 2 power

supply output plugholes

5,6 is vertical up and down.Two ends at metal ground connection mounting panel 1 are provided with installing hole 13-B.

As Fig. 1, shown in Figure 3, be placed with a

conductive metal sheet

14 and 13 respectively in the both sides of the middle layer bracket 3 that insulate.At the two ends of

conductive metal sheet

13,14, locate to be provided with sheet

clip leaf wing

60,61,62,63 with null line hole, the live wire hole of loam cake 2 power

supply output plugholes

5,6 are vertical up and down.

As shown in Figure 1, base 4 is used to hold middle layer bracket 3 and control circuit board 18.The bilateral symmetry of base 4 be provided with a pair of zero-power line, live wire input wires screw 9,10 and a pair of zero-power line, live wire output connection screw 109,110.

Core component of the present utility model is mounted in the control circuit board 18 in the housing, the power supply output connection screw 109,110 that it has the power

supply output plughole

5,6 that makes on the socket loam cake 2, base 4 both sides has/or non-transformer output and detect earth leakage protective socket whether end-of-life, show testing result, make reset button reliably, stably reset/or dropout, anti-lightning strike function.

As Fig. 1, shown in Figure 5, on circuit board 18, be provided with two elasticity power firestreaks, zero line input sheet metal 51,50.One end of power supply

input sheet metal

51,50 is bent downwardly 90 degree, passing differential differentiating transformer 19 is welded on the circuit board 18, link to each other with power firestreak, zero line input wires screw 10,9 by power supply input wires sheet 25,24, power firestreak input wires screw 10 links to each other with power firestreak in the wall by lead, and zero-power line input wires screw 9 links to each other with zero-power line in the wall by lead; The other end of power supply

input sheet metal

51,50 is respectively equipped with moving

contact

55 and 54.

The other end at circuit board 18 is welded with a pair of power firestreak that contacts with power supply output connection screw 110,109, zero line output sheet metal 81,80.End at power firestreak output sheet metal 81 is provided with two

fixed contacts

53 and 16; End at zero-power line output sheet metal 80 is provided with two

fixed contacts

52 and 15.

Shown in Fig. 4-1, Fig. 4-2, the end riveted joint that is installed in the conductive metal sheet 14 close power supply input sheet metals of middle layer bracket 3 one sides has an elastic sheet metal 21, is provided with a moving contact 23 in the end of elastic sheet metal 21.Equally, the end riveted joint that is installed in the conductive metal sheet 13 close power supply input sheet metals of middle layer bracket 3 opposite sides has an elastic sheet metal 20, is provided with a moving contact 22 in the end of elastic sheet metal 20.

As shown in Figure 5, a pair of moving

contact

55,54 on the elasticity power supply

input sheet metal

51,50 and power supply are exported a pair of fixed

contact

16,15 on the

sheet metal

81,80 and are contacted or disconnect, and constitute one group of live wire, zero line mains switch; On the power supply

output sheet metal

81,80 another contacts with a pair of moving

contact

23,22 on the

elastic sheet metal

21,20 fixed

contact

53,52 or disconnects, and constitutes another and organizes live wire, zero line mains switch.Moving contact, fixed contact on above-mentioned power supply

input sheet metal

51,50, the

elastic sheet metal

21,20 that links to each other with

conductive metal sheet

14,13, the power supply

output sheet metal

81,80 constitute two groups of four pairs of live wires, zero

line mains switch

55 and 16,54 and 15,23 and 53,22 and 52 altogether, correspond respectively to the K switch R-2-1 among circuit diagram 10-1～Figure 10-4, KR-2-2, KR-3-1, KR-3-2.

Shown in Fig. 1, Fig. 5, Fig. 7-1, on circuit board 18, also be provided with the differential differentiating transformer 19 that is used to detect leakage current.Shown in Figure 10-1～Figure 10-4, power firestreak HOT, zero line WHITE pass differential differentiating transformer 19 (L1 among the figure, L3).When leaky occurring in the current supply circuit; differential differentiating transformer will detect control chip IC1 (model is RV4145) to leakage current by output voltage signal; the pin 5 output control signals of chip IC 1 make controllable silicon (SCR) V4 conducting; make resetting on the circuit board 18/mechanical device that trips action by controllable silicon (SCR) V4; make reset button 8 reset/or thread off, earth leakage protective socket has/or non-transformer output.

Shown in Fig. 1, Fig. 5, Fig. 6-1, Fig. 7-1, Fig. 8-1, Fig. 9-1, on circuit board 18, be provided with power supply

input sheet metal

50,51 is connected with power supply

output sheet metal

81,80,

conductive metal sheet

13,14 electric power/or disconnection, thereby, supply socket is had/mechanical device that resets/trip of non-transformer output.

This mechanical device that resets/trip comprises the reset guide post 35 that is embedded in below the reset button 8, be enclosed within back-moving spring 91 on the reset guide post 35 and fast trip spring 66-A, the pad 28A that resets, " T " font release 28, snap close 30, with reset startup/

coupling cock

67,72,72A and the tripping coil 26 of reset button 8 interlocks.

" T " font release 28 is positioned at the below of reset button 8, with reset button 8 interlocks." T " font release 28 left and right sides stretch out to form and carry arm.The pad 28A that resets is positioned at the below of reset button 8, the top of " T " font release 28.Reset pad 28A and release 28 can be combined, and moves up and down with release 28; Simultaneously, reset pad 28A again can with release 28 (referring to Fig. 9-1～Fig. 9-3) separated from one another.Be provided with in the framework of trip coil 26K of ccontaining reset pad 28A and release 28 and be used to limit the pad 28A positive stop 26H of minimum removable point downwards that resets, four angle 26E of the pad 28A that resets are against positive stop 26H place.

Shown in Fig. 9-1, when assembling release 28 and resetting pad 28A, with power supply

import sheet metal

50,51,

elastic sheet metal

20,21 is placed on the top that arm is carried in release 28 left and right sides respectively, makes power supply

input sheet metal

50,51 carry moving up and down of arm with release about 28 and move.

Shown in Fig. 6-1, Fig. 7-1, Fig. 8-1, Fig. 9-1, have a vertical clear opening 29A that reset guide post 35 is passed in the centre of the pad 28A that resets, also have a central perforation longitudinally 29 in the centre of release 28, the reset guide post 35 that is with back-moving spring 91, fast trip spring 66-A that is embedded in reset button 8 bottom surfaces can move up and down along clear opening 29A, the central perforation 29 in the middle of the pad 28A that resets, the release 28.

Shown in Fig. 6-1, Fig. 7-1, Fig. 8-1, Fig. 9-1, the top diameter of reset guide post 35 forms step 35A greater than its underpart diameter between the upper and lower part; Back-moving spring 91 is enclosed within the top of reset guide post 35, between the middle layer bracket 3 of reset button 8 and insulation; Be with a fast trip spring 66-A in the lower part of reset guide post 35, this fast trip spring 66-A is at the step 35A of reset guide post 35 and reset between the pad 28A.This fast trip spring 66-A can make reset button 8 quickly and reliably thread off, and moving contact and fixed contact are disconnected apace, thereby, prolong useful life of earth leakage protective socket greatly.

Reset guide post 35 has the locked groove 36 of a depression near its place, bottom, the bottom surface of reset guide post 35 is plane 41, when reset button 8 is in trip status, the bottom surface 41 of reset guide post 35 be positioned at snap close 30 planes above, and be the dislocation shape with bonnet lock hole 31 on the snap close 30.

Have a through hole 30E who runs through before and after it at the middle part of release 28, cross release 28 middle part through hole 30E and be provided with a snap close 30 of movably making, be provided with a bonnet lock hole 31 at the end face of snap close 30 by metal material.When reset button 8 is in trip status, is contained in the clear opening 29A of the pad 28A that resets, release 28 centres, the bottom surface 41 of the reset guide post 35 in the central perforation 29 and the bonnet lock holes 31 of snap close 30 end faces and is the dislocation shape.

Be provided with a tripping coil 26 that is built-in with movable core 42 in the outside of snap close 30 sidewalls, tripping coil 26 built-in movable cores 42 face snap close 30.Snap close 30 can laterally move under the effect of iron core 42, thereby makes the bottom surface 41 of the reset guide post 35 under the reset button 8 penetrate or pass in the bonnet lock hole 31 of snap close 30 end faces, and reset button 8 resets or threads off (tripping operation).On movable core 42, be with spring 42A.

Shown in Fig. 6-1, Fig. 7-1, the utility model reset button 8 is stretched out a protruding 8B in the side near testing button 7, also stretches out a protruding 7B in the corresponding section with it at testing button 7.The protruding 7B of testing button 7 is positioned at the protruding 8B below of reset button 8, and when reset button 8 was pressed, the protruding 8B of reset button 8 moved down together by the protruding 7B drive testing button 7 of testing button 7.Be provided with an elastic sheet metal 46 below testing button 7, be provided with a test resistance 47 below elastic sheet metal 46, when reset button 8 was trip status and reset mode, test resistance 47 did not contact with elastic sheet metal 46.Shown in Figure 10-1～Figure 10-4, an end of elastic sheet metal 46 is positioned at the below of testing button 7, and the other end links to each other with the power firestreak or the zero-power line that pass differential differentiating transformer L1, L2 (19); The unsettled below that is positioned at elastic sheet metal 46 of one end of test resistance 47, the other end links to each other with the zero-power line of power input.

Shown in Fig. 7-2, when user's desire is used supply socket, pushing reset button 8 makes supply socket that power supply when output be arranged, when pushing reset button 8, testing button 7 is pressed, the elastic sheet metal 46 of its below contacts with test resistance 47, and the power firestreak or the zero-power line that pass differential differentiating transformer link to each other with the zero-power line of power input, produces leakage current.If earth leakage protective socket is intact, still have creepage protection function, the mechanical device that then resets/trip action resets reset button; If current leakage jack life termination; no longer has creepage protection function; the mechanical device that then resets/trip is failure to actuate; reset button can not reset all the time, and supply socket does not have power supply output, shows the state of earth leakage protective socket simultaneously; remind the user to note; in time change earth leakage protective socket,, make its drive testing button just can detect whether end-of-life and show testing result of earth leakage protective socket automatically so the utility model is pressed reset button earlier.

Shown in Fig. 6, Fig. 7-1, Fig. 9-1, below release 28, be provided with a startup/coupling cock that resets that links with reset button (RESET) 8, this startup/coupling cock that resets is made of metallic conduction spare 67, elastic sheet metal 72 and hard contact 72A.

Hard contact 72A is positioned at below; In the middle of elastic sheet metal 72 was positioned at, metallic conduction spare 67 was positioned at the top.

Hard contact 72A is positioned at below; In the middle of elastic sheet metal 72 was positioned at, metallic conduction spare 67 was positioned at the top.The top of hard contact 72A is an elastic sheet metal 72, is metallic conduction spare 67 above elastic sheet metal 72.Shown in Figure 10-1-Figure 10-4, metallic conduction spare 67, elastic sheet metal 72 constitute a K switch R-1, and hard contact 72A, elastic sheet metal 72 constitute another K switch R-4.

Shown in Fig. 7-1, Fig. 9-1, when reset button 8 was trip status, metallic conduction spare 67, elastic sheet metal 72, hard contact 72A all were off-state, and promptly K switch R-1, KR-4 all are off-state, and supply socket does not have power supply output.Shown in Fig. 7-2, Fig. 9-2, in the moment that reset button 8 is pressed, metallic conduction spare 67, elastic sheet metal 72 still are off-state, hard contact 72A contacts conducting with elastic sheet metal 72 lower surfaces, be that K switch R-1 is off-state, KR-4 is closure state, and the mechanical device that resets/trip action, supply socket still do not have power supply output.

Shown in Fig. 7-3, Fig. 8-1, Fig. 9-3, when reset button 8 is reset mode, metallic conduction spare 67, elastic sheet metal 72 upper surfaces contact conducting, elastic sheet metal 72 lower surfaces, hard contact 72A are off-state, be that K switch R-1 is closure state, K switch R-4 is off-state, and supply socket has power supply output.

Be pressed at testing button 7 and produce the simulation leakage current, supply socket detects this state, make to reset/mechanical device that trips action, when reset button 8 is threaded off tripping operation, shown in Fig. 7-4, Fig. 8-2, metallic conduction spare 67, elastic sheet metal 72, hard contact 72A all are off-state, and promptly K switch R-1, KR-4 are off-state, linked switch KR-2-1, KR-2-2, KR-3-1, KR-3-2 also are off-state, and supply socket does not have power supply output.

Shown in Figure 10-1～Figure 10-4, an end of metallic conduction spare 67 is unsettled, and the other end is welded on the circuit board, links to each other with the power input zero line with the controllable silicon V4 series connection on the control circuit board 18 is back; One end of elastic sheet metal 72 is unsettled, and the other end is welded on the circuit board and links to each other with the live wire of power input by tripping coil SOL; Hard contact 72A also is welded on the circuit board and links to each other with the power input zero line by controllable silicon.

As shown in Figure 6, reset pad 28A, release 28, snap close 30, all place in the framework of trip coil 26K with the startup/

coupling cock

67,72 that resets, the 72A of reset button 8 interlocks.Outside the coil of tripping coil 26, be provided with a tripping coil protective cover 41-C; Respectively be provided with a hook pin 41-B who is used to hook the hole on the circuit board 18 about its side.

Constitute the mechanical device that resets/trip reset guide post 35, be enclosed within back-moving spring 91 on the reset guide post 35 and fast trip spring 66-A, the pad 28A that resets, " T " font release 28, snap close 30, the startups/

coupling cock

67,72 that resets, 72A and tripping coil 26 with reset button 8 interlocks mutual be connected become one can the freedom activity integral body, they are fitted to each other, and are indispensable.

Fig. 6-the 1st, the utility model three-dimensional decomposition texture schematic diagram of mechanical device that resets/trip; Certainly the structure of mechanical device of resetting/trip is not limited to this.Shown in Fig. 6-2, the diameter of upper and lower part that is embedded in the reset guide post 35 of reset button 8 belows also can be identical; Back-moving spring 91 is enclosed within the top of reset guide post 35, between the middle layer bracket 3 of reset button 8 and insulation; Fast trip spring 66-A is enclosed within the lower part of reset guide post 35, this fast trip spring 66-A the insulation middle layer bracket 3 and reset between the pad 28A.

Figure 10-1 is the utility model earth leakage protective socket control circuit physical circuit figure.As shown in the figure; this control circuit is mainly by the differential differentiating transformer L1 (1000: 1) that is used to detect leakage current; L3 (200: 1); control chip IC1 (RV4145); be built-in with the tripping coil L3-1 (SOL) of iron core; controllable silicon V4; with earth leakage protective socket reset button RESET interlock; be connected on the K switch R-2-1 in the supply line; KR-2-2; KR-3-1; KR-3-2; testing button TEST switch (46,47) with reset button RESET interlock; startup/coupling cock KR-1 resets; KR-4; power supply output indicator LED1 and the diode that some are relevant; resistance; compositions such as electric capacity.

After the live wire HOT of earth leakage protective socket power input LINE, zero line WHITE pass differential differentiating transformer L1, L3, link to each other with live wire HOT, the zero line WHITE of earth leakage protective socket power output end (load link) LOAD by K switch R-2-1, KR-2-2 with reset button RESET interlock; Simultaneously, the output of live wire HOT, the zero line WHITE in the single-phase three-wire power supply output plughole on earth leakage protective socket surface conduction sleeve links to each other with power output end live wire HOT, the zero line WHITE of earth leakage protective socket by K switch R-3-1, the KR-3-2 of another group with reset button RESET interlock again.

The leakage current detection signal output of differential differentiating transformer L1, L3 links to each other with the

signal input part

1,2,3,7 of control chip IC1, and the control signal output ends 5 of control chip IC1 extremely links to each other with the control of controllable silicon V4.The working power input 6 of control chip IC1 links to each other with the live wire HOT of earth leakage protective socket power input LINE by resistance R 1, diode V1, tripping coil L3-1.The place of working pin 4 of control chip IC1 links to each other with the zero line WHITE of earth leakage protective socket power input LINE.

The negative electrode of controllable silicon V4 links to each other with the zero line WHITE of earth leakage protective socket power input LINE, the anode of controllable silicon V4 through and reset startup/coupling cock KR-1/KR-4, tripping coil L3-1 of the formation of reset button RESET interlock link to each other with power input live wire HOT.

The iron core that is built in the tripping coil L3-1 makes reset button RESET reset/or thread off by resetting in the earth leakage protective socket/mechanical device that trip, thereby makes and K switch R-2-1, the KR-2-2 of reset button RESET interlock, KR-3-1, KR-3-2, KR-1, KR-4 closure/or disconnection.

Between the live wire of earth leakage protective socket power output end LOAD and zero line, be connected with one and be used to represent whether earth leakage protective socket has the power supply output indicator LED1 of power supply output.When power supply output was arranged after earth leakage protective socket resets, LED1 was bright; Otherwise LED1 does not work.When earth leakage protective socket is in tripped condition, if socket is reversed wiring, the LED1 lamp will light, the expression false wiring, and reset/tripgear stops reset button to reset automatically.

Shown in Fig. 7-2, Fig. 9-2, when pressing reset button 8, reset button 8 drives testing button 7 and moves down together, elastic sheet metal 46 is contacted with test resistance 47, power input zero line and the power output end live wire or the zero line short circuit that pass differential differentiating transformer produce the simulation leakage current; The elastic sheet metal 72 that constitutes the startup/coupling cock that resets contacts conducting with hard contact 72A, K switch R-4 closure among Figure 10-1, A point among Figure 10-1 and B point short circuit, the voltage at former AB two ends is added on tripping coil (SOL) L3, making has certain electric current to flow through and produces magnetic field in the tripping coil, inner iron core is done ballistic motion, by the mechanical device that resets/trip reset button can be resetted shown in Fig. 7-3, Fig. 8-1, supply socket has power supply output, and LED1 is bright for the power supply output indicator; Simultaneously, because reset button RESET resets, testing button 7 is also together moved up, elastic sheet metal 46 disconnects with test resistance 47, and the simulation leakage current disappears; The hard contact 72A and the elastic sheet metal 72 that constitute the startup/coupling cock that resets disconnect, and metallic conduction spare 67 contacts conducting with elastic sheet metal 72, and K switch R-4 disconnects, the KR-1 closure.After reset button RESET resets, Lian Dong K switch R-2-1 with it, KR-2-2; KR-3-1, the KR-3-2 closure, earth leakage protective socket has power supply output; LED1 is bright for the power supply output indicator, shows that the single-phase three-wire jack of receptacle face and load output all have power supply output.

When the earth leakage protective socket function is intact, after earth leakage protective socket correctly inserts power supply, press reset button RESET drive testing button circuit is detected, detect successful earth leakage protective socket and just can reset.Load end LOAD and receptacle face have electric power output, socket operate as normal.This moment is when having leakage current generating in the circuit, because power firestreak HOT and zero line WHITE pass differential differentiating transformer L1 (1000: 1) and the L3 (200: 1) that is used to detect leakage current simultaneously, pass current phasor in two power lines of differential differentiating transformer L1 and L3 and non-vanishing in the circuit, the voltage signal that differential differentiating transformer L1 and L3 induce certain value at once is input to IC1, output a control signal to the gate pole of controllable silicon V4 from 5 pin of IC1, controllable silicon V4 is triggered, positive pole and negative pole conducting, the two ends of tripping coil L3-1 will obtain the voltage of certain value, there is certain electric current to flow through, produce magnetic field, its inner iron core is done ballistic motion, by the mechanical device that resets/trip reset button RESET is threaded off, moving in the supply socket, fixed contact disconnects, the output of cutting off the electricity supply, power supply output indicator LED1 extinguishes.

In above various situations, the control signal of exporting from 5 pin of IC1 must suppress the generation of false triggering through being attempted by the filtering of the anti-interference capacitor C 5 between silicon controlled gate pole and the ground.

When earth leakage protective socket is working properly in power supply when output, arranged; want to cut off its power supply output; shown in Fig. 7-4, Fig. 8-2; push testing button 7; elastic sheet metal 46 is contacted with test resistance 47, produce the simulation leakage current, make to reset/mechanical device that trips action; thereby make reset button 8 tripping operations thread off the output of cutting off the electricity supply.

Shown in Fig. 9-1, the power supply output indicator is arranged on the control circuit board 18, be provided with a light lead pipe 77 of vertically placing on indicator light 56, this light lead pipe 77 passes the hole D (as shown in Figure 3) on the middle layer bracket 3, and its top is positioned at the below of the indicator lamp hole 30-A on loam cake 2 surfaces.

In order to improve the useful life of earth leakage protective socket, avoid because the instantaneous pressure that thunderbolt or other reasons produce damages earth leakage protective socket, as Fig. 7-1, Fig. 8-1, shown in Figure 5, one end of the utility model power firestreak, zero line

input sheet metal

51,50 passes behind the differential differentiating transformer respectively with the pin of, power supply input wires sheet, the point discharge sheet metal 25A right angle trigonometry shape, that be used to discharge, 24A and links to each other, and is welded on together on the circuit board 18; The sheet metal 25A, the 24A tip that are used to discharge are staggered relatively, and keep certain intervals.

In addition, the live wire HOT of power input also links to each other with the zero line WHITE of power input through tripping coil SOL, a piezo-resistance MOV.

When acting on earth leakage protective socket owing to the instantaneous pressure that is struck by lightning or other reasons causes; the discharge metal sheet and the air dielectric that is connected between the discharge metal sheet of right angle trigonometry shape at input zero line place of right angle trigonometry shape that is connected to input live wire place is breakdown; form atmospherical discharges; most of high pressure consumes by the discharge metal sheet; the residue sub-fraction consumes by tripping coil SOL, piezo-resistance MOV, thereby has protected earth leakage protective socket not broken by high pressure.

In specific embodiment of the utility model, described piezo-resistance MOV selects surge inhibition type piezo-resistance for use, makes it can also play the effect that prevents electrophoresis.

Shown in Figure 10-1～Figure 10-4, the utility model also has the defencive function that stops the reverse wiring mistake.As shown in the figure, link to each other by K switch R-3-1, KR-3-2 between the single-phase three-wire supply hub of earth leakage protective socket load output LOAD and receptacle face with reset button RESET interlock; The live wire of earth leakage protective socket input LINE; the live wire of the single-phase three-wire supply hub of zero line and receptacle face; between the zero line also be by with the K switch R-2-1 of reset button RESET interlock; KR-2-2 links to each other; so; when the installer links to each other the power line in the wall mistakenly with earth leakage protective socket load output LOAD; the utility model can't produce leakage current; control chip IC1 can't export control signal; not conducting of controllable silicon V4; there is not electric current to flow through in the tripping coil SOL; can't produce magnetic field and promote built-in iron core action wherein; the mechanical device that resets/trip is failure to actuate; automatically stop reset button to reset; K switch R-2-1 with reset button RESET interlock; KR-2-2; KR-3-1; KR-3-2 is in off-state all the time; can't be closed; the equal non-transformer output of the input LINE of earth leakage protective socket and the supply hub of receptacle face; homing light LED1 is bright, shows wiring error.After the erector had only wiring correct, testing button (TEST) could detect all normal reset button and just can reset, and the earth leakage protective socket load just has power supply output.

The above is specific embodiment of the utility model and the know-why used, and is any based on the equivalent transformation on the technical solutions of the utility model basis, all belongs within the utility model protection range.

Claims

1, a kind of earth leakage protective socket; it comprises housing, be installed in the reset button of surface of shell (8), testing button (7), be installed in the earth leakage protective socket realized in the housing and have/control circuit board (18) of non-transformer output; on this control circuit board, be provided with the differential differentiating transformer that at least one pair of elasticity power supply is imported sheet metal, a pair of power supply output sheet metal (81,80), is used to detect leakage current, it is characterized in that:

When described reset button (8) started work, whether interlock testing button (7) still has creepage protection function to earth leakage protective socket was earlier detected, and detecting successfully, the back reset button just can reset;

Be provided with an elastic sheet metal (46) in the below of described testing button (7), be provided with a test resistance (47) in the below of elastic sheet metal (46);

One end of elastic sheet metal (46) is positioned at the below of testing button (7), and the other end links to each other with the power firestreak or the zero-power line that pass differential differentiating transformer (19); The unsettled below that is positioned at elastic sheet metal (46) of one end of test resistance (47), the other end links to each other with the zero-power line of power input;

When reset button (8) was trip status and reset mode, test resistance (47) did not contact with elastic sheet metal (46); When being pressed, test resistance (47) contacts with elastic sheet metal (46) in reset button (8).

2, earth leakage protective socket according to claim 1 is characterized in that: described reset button (8) is stretched out a projection (8B) in the side near testing button (7); In the below of this projection (8B), also stretch out a projection (7B) on the testing button (7);

When described reset button (8) was pressed, the projection (8B) of reset button (8) moved down together by projection (7B) the drive testing button (7) of testing button (7); Described elastic sheet metal (46) also moves down with test resistance (47) and contacts conducting, makes testing button carry out life-span stop detection to earth leakage protective socket in the very first time; Detect successful reset button (8) and reset, (LED1) is bright for the power supply output indicator, otherwise stops reset button (8) to reset, and power supply output indicator (LED1) does not work.

3, earth leakage protective socket according to claim 1 and 2 is characterized in that: be provided with on described control circuit board described power supply input sheet metal, elastic sheet metal, power supply output sheet metal (81,80) electric power are connected/or the mechanical device that resets/trip that disconnects;

This mechanical device that resets/trip comprises the reset guide post (35) that is embedded in below the earth leakage protective socket reset button (8), be enclosed within back-moving spring (91) on the reset guide post (35), fast trip spring (66-A), the pad that resets (28A), " T " font release (28), snap close (30), tripping coil (26), with the startup/coupling cock that the resets reset button interlock, expression reset button state;

Described back-moving spring (91) and fast trip spring (66-A) all are enclosed within on the reset guide post (35); Reset guide post (35) has a locked groove (36) that caves near its place, bottom, and the bottom surface of reset guide post (35) is plane (41);

Have a through hole (30E) that runs through before and after it at the middle part of release (28), cross release (28) middle part through hole (30E) and be provided with a snap close of movably making (30), be provided with a bonnet lock hole (31) at the end face of snap close (30) by metal material; In reset button (8) when being in trip status, the bottom surface (41) of reset guide post (35) be positioned at snap close (30) plane above, and be the dislocation shape with bonnet lock hole (31) on the snap close (30).

4, earth leakage protective socket according to claim 3, it is characterized in that: the top diameter of described reset guide post (35) is greater than its underpart diameter, form the top that step (35A) back-moving spring (91) is enclosed within reset guide post (35) between the upper and lower part, be positioned between the middle layer bracket (3) of reset button (8) and insulation;

Described fast trip spring (66-A) is enclosed within the lower part of reset guide post (35), is positioned between the step (35A) of reset guide post (35) and the pad that resets (28A).

5, earth leakage protective socket according to claim 3, it is characterized in that: described reset guide post (35) is upper and lower equally thick, back-moving spring (91) is enclosed within the top of reset guide post (35), is positioned between the middle layer bracket (3) of reset button (8) and insulation;

The fast trip spring housing is positioned between the middle layer bracket (3) of insulation and the pad that resets (28A) in the lower part of reset guide post.

6, new type electric leakageproof socket according to claim 3 is characterized in that: the described startup/coupling cock that resets is positioned at the below of release (28), links with reset button (8);

This startup/coupling cock that resets is made of metallic conduction spare (67), elastic sheet metal (72) and hard contact (72A);

Hard contact (72A) is positioned at below; In the middle of elastic sheet metal (72) was positioned at, this elastic sheet metal can move up and down with release (28); Metallic conduction spare (67) is positioned at the top; Metallic conduction spare (67), elastic sheet metal (72) constitute a switch (KR-1), and hard contact (72A), elastic sheet metal (72) constitute another switch (KR-4);

When being trip status, metallic conduction spare (67), elastic sheet metal (72), hard contact (72A) all are off-state in reset button (8), and promptly switch (KR-1, KR-4) all is off-state, and supply socket does not have power supply output;

In the moment that reset button (8) is pressed, the drive testing button moves down, elastic sheet metal (46) contacts with test resistance (47), metallic conduction spare (67), elastic sheet metal (72) still are off-state, hard contact (72A) contacts conducting with elastic sheet metal (72) lower surface, be that switch (KR-1) is off-state, (KR-4) being the closure state supply socket does not still have power supply output;

In reset button (8) when being reset mode, test resistance (47) and elastic sheet metal (46) disconnect, metallic conduction spare (67), elastic sheet metal (72) upper surface contact conducting, elastic sheet metal (72) lower surface, hard contact (72A) are off-state, be that switch (KR-1) is closure state, switch (KR-4) is off-state, and supply socket has power supply output.

7, new type electric leakageproof socket according to claim 6, it is characterized in that: an end that constitutes metallic conduction spare startup/coupling cock, that be positioned at uppermost position (67) that resets is unsettled, the other end is welded on the circuit board, links to each other with the power input zero line; One end of elastic sheet metal (72) is unsettled up and down, and the other end is welded on the circuit board and links to each other with the live wire of power input by tripping coil (SOL); Hard contact (72A) also is welded on the circuit board and links to each other with the power input zero line by controllable silicon.

8, earth leakage protective socket according to claim 7 is characterized in that: the end of described power firestreak output sheet metal (81) is provided with two fixed contacts (53 and 16); End at zero-power line output sheet metal (80) is provided with two fixed contacts (52 and 15);

One end of described elasticity power firestreak, zero line input sheet metal (51,50) is bent downwardly 90 degree, passing differential differentiating transformer (19) is welded on the circuit board, link to each other with power firestreak, zero line input wires screw (10,9), power firestreak input wires screw (10) links to each other with power firestreak in the wall by lead, and zero-power line input wires screw (9) links to each other with zero-power line in the wall by lead; The other end of power supply input sheet metal (51,50) is respectively equipped with moving contact (55 and 54);

The both sides of the insulation middle layer bracket in the earth leakage protective socket housing are placed with a conductive metal sheet (the 14 and 13) end riveted joint of the conductive metal sheet of a side (14) therein respectively an elastic sheet metal (21), is provided with a moving contact (23) in the end of elastic sheet metal (21); End riveted joint at the conductive metal sheet (13) of opposite side has an elastic sheet metal (20), is provided with a moving contact (22) in the end of elastic sheet metal (20);

A pair of moving contact (55,54) on the described elasticity power supply input sheet metal (51,50) and power supply are exported a pair of fixed contact (16,15) on the sheet metal (81,80) and are contacted or disconnect, and constitute one group of live wire, zero line mains switch; On the power supply output sheet metal (81,80) another contacts with a pair of moving contact (23,22) on the elastic sheet metal (21,20) fixed contact (53,52) or disconnects, and constitutes another and organizes live wire, zero line mains switch;

Above-mentioned power supply input sheet metal (51,50), the elastic sheet metal (21,20) that links to each other with conductive metal sheet (14,13), moving contact, fixed contact on the power output end (81,80) constitute two groups of four pairs of live wires, zero line mains switch (55 and 16,54 and 15,23 and 53,22 and 52) altogether.

9, new type electric leakageproof socket according to claim 8, it is characterized in that: an end of described power firestreak, zero line input sheet metal (51,50) links to each other with the pin of the point discharge sheet metal right angle trigonometry shape, that be used to discharge (25A, 24A) respectively, is welded on together on the circuit board (18); The sheet metal that is used to discharge (25A, 24A) is most advanced and sophisticated staggered relatively, and keeps certain intervals.