CN102509919B

CN102509919B - Leakage protection socket with inverted wiring protection function

Info

Publication number: CN102509919B
Application number: CN 201110337548
Authority: CN
Inventors: 黄华道
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-10-31
Filing date: 2011-10-31
Publication date: 2013-08-28
Anticipated expiration: 2031-10-31
Also published as: CN102509919A

Abstract

The invention provides a leakage protection socket with an inverted wiring protection function. The leakage protection socket comprises a shell, a pair of output conductors with conductive plug bushes, a resetting button, a power input end, a power output end, a pair of input moving contacts electrically connected with the power input end, a pair of output moving contacts electrically connected with the power output end and an electromagnetic tripping mechanism, wherein an upper tripping piece and a lower tripping piece are arranged in the shell; a limiting part for linking the upper tripping piece and the lower tripping piece when the upper tripping piece and the lower tripping piece move in opposite directions to a certain distance and an elastic element for accumulating elastic potential energy when the upper tripping piece and the lower tripping piece move towards each other are arranged between the upper tripping piece and the lower tripping piece; the upper tripping piece can be pressed to move downwards by the resetting button; and the lower tripping piece overcomes the resistance of the elastic element through matched slopes and rises. The leakage protection socket has the advantages that: the upper tripping piece is matched with the lower tripping piece, so that the input moving contact and the output moving contact are driven to contact with or be separated from the output conductors, and the leakage protection function and the inverted wiring protection function are realized; furthermore, the leakage protection socket has a simple structure, and acts reliably.

Description

Have the earth leakage protective socket of backing protection function concurrently

Technical field

What the present invention relates to is a kind of supply socket, specifically refers to a kind of earth leakage protective socket that has backing protection function concurrently.

Background technology

Tripping operation outage in time when earth leakage protective socket in use leakage current occurs, be widely used, it is 200810104187.4 earth leakage protective socket as application number, comprise housing, the a pair of output conductor that has the conductor sleeve, reset button, power input, power output end, the a pair of input moving contact that links to each other with power input and, a pair of output moving contact and circuit board that power output end links to each other, also be provided with in the housing and can and be used for when producing leakage current the electromagnetic trip mechanism of latching device release etc. with the latching device of reset button hook location, under the initial condition, power line is inserted power input, this moment, output conductor was not charged, press reset button, produce moment simulation leakage current, the electromagnetic trip mechanism kinematic, originally snap close and the reset button lead with the dislocation of reset button lead aligns, behind reset button and the snap close hook location, the input moving contact contacts conducting with output conductor, and output conductor is charged; When leakage current occurring in the use, the electromagnetic trip mechanism kinematic, snap close and the reset button lead with reset button lead hook location aligns originally, and reset button is upspring, and input moving contact and output conductor disconnect.For prevent wrong when power line is inserted power output end (reversal connection line) do not have original creepage protection function, earth leakage protective socket also should have backing protection function, with the snap close locking position, forbids resetting when the reversal connection line.

Summary of the invention

The object of the present invention is to provide a kind of simple in structure, earth leakage protective socket that has backing protection function concurrently that operation precision is high.

For achieving the above object, the present invention institute is by the following technical solutions:

Have the earth leakage protective socket of backing protection function concurrently, comprise housing, conduct electricity the output conductor of sleeve a pair of having, reset button, power input, power output end, the a pair of input moving contact that is electrically connected with power input, the a pair of output moving contact that is electrically connected with power output end, can and be used for when producing leakage current electromagnetic trip mechanism with the snap close release with the snap close of reset button hook location, it is characterized in that: output conductor have two pairs be respectively up and down towards fixed contact, the input moving contact is positioned at output conductor fixed contact top up, and the output moving contact is positioned at output conductor fixed contact below and Elastic Contact down; Also be provided with the last dropout part that can drive the elevating movement of input moving contact and the following dropout part that can drive the elevating movement of output moving contact in the housing, be provided with between last dropout part and the following dropout part to move in the opposite direction and make the limiting component of the two interlock behind the certain distance and the flexible member of savings elastic potential energy when move toward one another, last dropout part and following dropout part are equipped with the through hole that passes for the reset button lead, the last dropout part button press that can be reset is descending, overcomes the flexible member resistance under following dropout part can drive by the domatic snap close in the unlocking direction horizontal movement that cooperatively interacts and rises; Described upward dropout part and following dropout part cooperate spacing by hook and the vertical slot that has limited step, be provided with back-moving spring between last dropout part and the following dropout part; Last dropout part and following dropout part drive respectively each self-corresponding moving contact under the driving of reset button respectively with the contact of fixed contact up and down of output conductor or separate.

Further, described electromagnetic trip mechanism comprises framework of trip coil, tripping coil, iron core, iron core return-spring and permanent magnet, and framework of trip coil has the iron core containing tube, and iron core containing tube outer wall coats tripping coil, and iron core is set in the pipe; The iron core front end has the driving groove, and snap close has the breach that snaps in for iron core driving groove.

Further, described iron core has the spring positioning step, and permanent magnet has the spring positioning step, and the iron core return-spring two ends are resisted against on two positioning steps.

Further, described housing comprises loam cake and drain pan, and circuit board is set in the drain pan; The circuit board top arranges capping; Framework of trip coil has downward opening storage tank, and framework of trip coil is fixedlyed connected with capping is removable.

Further, described dropout part down is arranged in the framework of trip coil storage tank, and following dropout part is provided with the snap close mounting groove; Framework of trip coil below storage tank has the transition of doing descending motion when can make snap close be pulled to the iron core containing tube by iron core at the edge towards the iron core containing tube domatic; Snap close is provided with the lockhole that can cooperate with reset button lead front end step hook.

Further, described dropout part down has fin, and storage tank inwall relevant position, framework of trip coil below arranges vertical slot, and following dropout part cooperates the liftable motion by fin with the vertical slot of framework of trip coil below storage tank inwall.

Further, described input moving contact stiff end is fixedly mounted in the mounting groove of framework of trip coil, by a pair of rib groove clamping of last dropout part and the interlock of last dropout part, input moving contact stiff end is electrically connected with power input and circuit board by flexible wire near free-ended position.

Further, described output moving contact is fixedly mounted on down in the mounting groove of dropout part, and the output moving contact is electrically connected with circuit board by flexible wire.

Further, also be provided with the simulation leakage current generating switch with the reset button interlock, simulation leakage current generating switch butt produced moment simulation leakage current and makes the electromagnetic trip mechanism action when reset button was pressed, and permission reset button lead passes the snap close lockhole and cooperates with lockhole edge hook.

Further, described simulation leakage current generating switch comprises the moving sheet metal that is set with back-moving spring and the quiet sheet metal that is plugged on the circuit board, back-moving spring is arranged in two extended mount pads of induction coil skeleton sidewall, and moving sheet metal has the presser feet that can contact with quiet sheet metal and the step of pressing that can contact cooperation with following dropout part.

Further, also be provided with a unit switch that function is two-in-one, comprise elastic sheet metal, be plugged on quiet sheet metal and the quiet sheet metal that is plugged on the framework of trip coil on the circuit board, two quiet sheet metals all are electrically connected with circuit board, the elastic sheet metal stiff end is plugged on the circuit board, free end is withheld with the insulating part of reset button interlock by one, the elastic sheet metal free end contacts with quiet sheet metal as power output end and output conductor a channel selector between mutually wherein under the nature, after reset button successfully resets, when the reset button lead is depressed insulating part elastic sheet metal is contacted with quiet sheet metal as the circuit board power switch.

Further, described reset button lead can contact cooperation with insulating part, and insulating part has fin, and the storage tank of following dropout part below is provided with the vertical slot with the insulating part fin, and insulating part is by storage tank and the elastic sheet metal of dropout part below cooperate the location down.

Further, comprise that also testing button reaches the Test Switchboard for generation of moment simulation leakage current, Test Switchboard comprises elastic sheet metal, drive Metallic rod and be plugged on quiet sheet metal on the circuit board, the elastic sheet metal stiff end is arranged on the housing fixed bit, it is spacing to be output one of conductor near free-ended position, free end is corresponding with testing button lead position, and elastic sheet metal is electrically connected with circuit board, drives Metallic rod and is electrically connected with quiet sheet metal by flexible wire.

Further, drive Metallic rod and have the kink that is with back-moving spring, kink and back-moving spring are arranged in the mount pad of framework of trip coil; Drive the Metallic rod lower end and have the step that cooperates away from iron core one side with snap close, it is domatic that the step of driving Metallic rod and snap fit has transition.

Compared with prior art, beneficial effect of the present invention is: drive the input moving contact and export moving contact with the output conductor contact or separate with following dropout part by being equipped with the dropout part, realize earth leakage protective and backing protection function, simple in structure, reliable in action; Realize life end checking function, safety easy to use by testing button and Test Switchboard; By driving testing button and driving Metallic rod and snap fit, when end-of-life, realize the machinery dropout quickly and easily; To thread off down part and insulating parts etc. of framework of trip coil and capping are enclosed in the storage tank, and compact mechanical structure is moved reliable and stable.

Description of drawings

Fig. 1 is the assembly structure schematic diagram of the embodiment of the invention one;

Fig. 2 is the decomposition texture schematic diagram of the embodiment of the invention one;

Fig. 3 is the output conductor of the embodiment of the invention one and the structural representation of input moving contact and output moving contact matching relationship;

Fig. 4 be the output conductor of embodiments of the invention one under another visual angle with the structural representation of input moving contact and output moving contact matching relationship;

Fig. 5 is the decomposition texture schematic diagram of the interior basic element of character of housing of the embodiment of the invention one;

Fig. 6 is the output conductor of the embodiment of the invention two and the structural representation of input moving contact and output moving contact matching relationship;

Fig. 7 be the output conductor of embodiments of the invention one under another visual angle with the structural representation of input moving contact and output moving contact matching relationship;

Fig. 8 is the decomposition texture schematic diagram of the interior basic element of character of housing of the embodiment of the invention two;

Fig. 9 is the A-A cutaway view of the present invention under initial condition;

Figure 10 is the B-B cutaway view of the present invention under initial condition;

Figure 11 presses A-A cutaway view when not resetting as yet for the present invention in reset button;

Figure 12 presses B-B cutaway view when not resetting as yet for the present invention in reset button;

Figure 13 for the present invention at the A-A cutaway view that successfully resets when namely exporting moving contact and output conductor conducting;

Figure 14 for the present invention at the B-B cutaway view that successfully resets when namely exporting moving contact and output conductor conducting;

Figure 15 for the present invention at false wiring and iron core by the A-A cutaway view of permanent magnet adhesive;

Figure 16 for the present invention at false wiring and iron core by the B-B cutaway view of permanent magnet adhesive;

Figure 17 is that the present invention is at the A-A of end-of-life status cutaway view;

Figure 18 presses the A-A cutaway view of to the second place forcing trip status with testing button for the present invention when end-of-life;

Figure 19 circuit diagram of the present invention.

Embodiment

The present invention is further detailed explanation below in conjunction with drawings and Examples:

Embodiment one

Referring to figs. 1 through shown in Figure 4, have the earth leakage protective socket of backing protection function concurrently, comprise housing, a pair of have conduct electricity sleeve output conductor (9,8), reset button 2, power input (14B, 14A), power output end (15B, 15A), a pair of input moving contact (18B, 18A) that is electrically connected with power input, a pair of output moving contact (24A, 24B) that is electrically connected with power output end, can and be used for when producing leakage current electromagnetic trip mechanism with the snap close release with the snap close 34 of reset button 2 hooks location; Output conductor (9,8) have two pairs be respectively up and down towards fixed contact, the input moving contact is positioned at output conductor fixed contact (9A, 8A) top up, the output moving contact is positioned at output conductor fixed contact (9B, 8B) below and Elastic Contact down; Also be provided with the last dropout part 19 that can drive the elevating movement of input moving contact and the following dropout part 33 that can drive the elevating movement of output moving contact in the housing, be provided with between last dropout part 19 and the following dropout part 33 to move in the opposite direction and make the limiting component of the two interlock behind the certain distance and the flexible member of savings elastic potential energy when move toward one another, last dropout part 19 and following dropout part 33 are equipped with the through hole that passes for the reset button lead, last dropout part 19 button 2 that can be reset is pressed descendingly, overcomes the flexible member resistance under following dropout part 33 can drive by the domatic snap close in the unlocking direction horizontal movement that cooperatively interacts and rises.

Electromagnetic trip mechanism comprises framework of trip coil 11, tripping coil, iron core 35, iron core return-spring 36 and permanent magnet 16, and framework of trip coil 11 has iron core containing tube 11B, and iron core containing tube outer wall coats tripping coil L3, and iron core 35 is set in the pipe.Iron core 35 has spring positioning step 35A, and permanent magnet 16 has spring positioning step 16A, and iron core return-spring 36 two ends are resisted against on two positioning steps.The iron core front end has the groove of driving 35B, and snap close 34 has the breach 34A that snaps in for iron core driving groove, and the both sides inwall that drives groove can drive with snap fit and latch in forward-reverse on the horizontal direction.

Housing comprises loam cake 1 and drain pan 43, connects by screw 44; Circuit board 68 is set in the drain pan 43; Circuit board 68 tops arrange capping 41; Framework of trip coil 11 has downward opening storage tank, framework of trip coil 11 and capping 41 removable fixedlying connected.Following dropout part 33 is arranged in the framework of trip coil storage tank, and following dropout part 33 is provided with the snap close mounting groove, snap close can be in the snap close mounting groove horizontal movement and the height of dropout part 33 under not influencing, snap close drives down 33 declines of dropout part simultaneously when descending; Framework of trip coil 11 below storage tanks have the transition of doing descending motion when can make snap close 34 be pulled to the iron core containing tube by iron core 35 at the edge towards the iron core containing tube domatic; Snap close has kink, and snap close is used for being positioned at snap close bending ridge position with the breach of iron core driving groove fit; Framework of trip coil is used for the domatic snap close bending ridge top that is arranged on of release; Snap close 34 is provided with the lockhole 34C that can cooperate with reset button lead front end step 2C hook.The reset button lead is with back-moving spring 4, and the reset button lead passes dropout part 19, framework of trip coil 11, following dropout part 33 and snap close 34 respectively.

In the present embodiment, following dropout part 33 has fin 33B, and storage tank inwall relevant position, framework of trip coil 11 below arranges vertical slot, and following dropout part 33 cooperates the liftable motion by fin 33B with the vertical slot of framework of trip coil 11 below storage tank inwalls.Following dropout part 33 belows arrange back-moving spring, and particularly, following dropout part 33 is provided with spring mounting seat 33E, are with spring 42 on the following dropout part spring mounting seat 33E, and spring 42 other ends and capping 41 offset.

The last dropout part 19 of present embodiment and following dropout part 33 cooperate spacing by hook and the vertical slot that has limited step, last dropout part 19 has vertical slot 19C, following dropout part 33 has hook 33D, framework of trip coil 11 has the through hole 11E that dropout part hook 33D passes under the confession, certainly, hook and vertical slot position can be changed, reset by back-moving spring 30 between last dropout part 19 and the following dropout part 33, back-moving spring 30 two ends can be resisted against respectively on dropout part and the following dropout part, also can be resisted against on dropout part and the framework of trip coil respectively; Last dropout part 19 drives

input moving contact

18B, 18A, and following dropout part 33 drives

output moving contact

24B, 24A contacts with the fixed contact up and down of output conductor respectively under the driving of reset button 2 or disconnect.

With reference to Fig. 3, Fig. 4 and circuit diagram Figure 19,

output conductor

8,9 following

fixed contact

8B, 9B and

output moving contact

24B, 24A form one group of normally closed switch (KR-3-1, KR-3-2), and

output conductor

8,9 last fixed

contact

8A, 9A and

input moving contact

18B, 18A form one group of normal open switch (KR-2-1, KR-2-2); Input moving contact 18B, the 18A stiff end is fixedly mounted in the mounting groove 11D of framework of trip coil 11, linked by a pair of rib groove 19D clamping of last dropout part 19 and last dropout part near free-ended position, input moving contact 18B, the 18A stiff end is by flexible wire and

power input

14B, 14A and circuit board 68 are electrically connected, particularly,

induction metal plate

17B, 17A is formed with a pair of pin 17F that passes for detection of two induction coils of leakage current, 17E, pin is plugged on the circuit board 68,

induction metal plate

17B, 17A is by flexible wire and input moving contact 18B, (lead fixed is at connecting hole 17D in the 18A electrical connection, in the 17C);

Output moving contact

24B, 24A are fixedly mounted on down in the mounting groove 33A of dropout part 33, the fluting 11A that the output moving contact mounting groove 33A of dropout part stretched out under framework of trip coil 11 had and supplies, the output mounting groove 33A of present embodiment is formed by four hooks,

output moving contact

24B, 24A are electrically connected with circuit board 68 by flexible wire, particularly,

output moving contact

24B, 24A link to each other with

output brace

23,22 by flexible wire,

output brace

23,22 is plugged on the circuit board 68, and is spacing by the breach 41A of framework of trip coil 11 storage tank inwalls and shrouding 41.

The present invention is provided with the simulation leakage current generating K switch 2 with reset button 2 interlocks, simulation leakage current generating K switch 2 butts produced moment simulation leakage current and make the electromagnetic trip mechanism action when reset button was pressed, permission reset button lead passes the snap close lockhole and cooperates with lockhole 34C edge hook, simulation leakage current generating K switch 2 comprises the moving sheet metal 27 that is set with back-moving spring 28 and the quiet sheet metal 29 that is plugged on the circuit board, back-moving spring 28 is arranged in two extended mount pad 26B of induction coil skeleton 26 sidewalls, and moving sheet metal 27 has the presser feet that can contact with quiet sheet metal 29 and the step of pressing that can contact cooperation with following dropout part 33.

With reference to Fig. 5, B-B cutaway view and Figure 19, the present invention is provided with a unit switch K3 that function is two-in-one, comprise elastic sheet metal 39, be plugged on circuit board 68(and pass shrouding 41) on quiet sheet metal 37 and be plugged on quiet sheet metal 40 on the framework of trip coil 11, quiet sheet metal 40 is electrically connected with circuit board through lead, elastic sheet metal 39 stiff ends are plugged on the circuit board, free end is withheld with the insulating part 38 of reset button 2 interlocks by one, elastic sheet metal 39 free ends contact with quiet sheet metal 40 as power output end and output conductor a channel selector between mutually wherein under the nature, reset button is pressed after success resets, when the reset button lead is depressed insulating part 38 elastic sheet metal 39 is contacted with quiet sheet metal 37 as the circuit board power switch.The reset button lead can contact cooperation with insulating part 38, insulating part 38 has fin 38B, the storage tank of following dropout part 33 belows is provided with the vertical slot with insulating part fin 38B, and insulating part 38 is by storage tank and the elastic sheet metal 39 of dropout part 33 belows cooperate the location down.

Earth leakage protective socket of the present invention also has life end checking function, this earth leakage protective socket also comprises testing button 3 and simulates the Test Switchboard K1 of leakage current for generation of moment, Test Switchboard K1 comprises elastic sheet metal 10, drive Metallic rod 31 and be plugged on quiet sheet metal 29 on the circuit board, elastic sheet metal 10 stiff ends are arranged on the housing fixed bit (middle layer bracket), be output one of conductor spacing (the output conductor relevant position is provided with stopper slot) near free-ended position, free end is corresponding with testing button lead position, elastic sheet metal 10 is electrically connected with output sleeve conductor, driving Metallic rod 31 is electrically connected with quiet sheet metal 29 by flexible wire, finally link to each other with input through resistance R 4, press testing button 3, the testing button lead is depressed moving sheet metal 10 and is contacted with driving Metallic rod 31, the closed simulation leakage current that produces of Test Switchboard K1; Drive Metallic rod 31 and have the kink that is with back-moving spring 32, kink and back-moving spring 32 are arranged in the mount pad of framework of trip coil 11; Drive Metallic rod 31 lower ends and have the step that cooperates away from iron core one side with snap close 34.

For easy to assembly, the mount pad 26B that is used for installing on the two induction coil skeletons 26 that move sheet metal 27 stretches in the framework of trip coil 11, be used for installing the framework of trip coil mount pad that drives Metallic rod 31 and be positioned at moving sheet metal 27 tops, snap close 34 has the breach that cooperates with mount pad 26B on two induction coil skeletons 26, also be provided with the flexible wire guide channel on two induction coil skeletons, it is stable to be convenient to assembling and parts.

If this earth leakage protective socket life-span stops; the akinesia of electromagnetic trip mechanism is tripped after the Test Switchboard K1 closure; for guaranteeing safety; the present invention also has hand-operated forced tripping function; realize by driving Metallic rod 31; it is domatic that the step that driving Metallic rod 31 cooperates with snap close 34 has transition; when testing button 3 is pressed in pressure to the second place; driving Metallic rod 31 declines makes snap close 34 move horizontally; the lockhole 34C of snap close 34 aligns with the reset button lead; reset button is upspring, and the input moving contact separates with fixed contact on the output conductor.

Course of action is with reference to Fig. 9 to Figure 18, initial condition such as Fig. 9 and shown in Figure 10, import fixed contact disconnection on moving

contact

18B, 18A and the output conductor this moment,

output moving contact

24B, 24A contact with fixed contact under the output conductor, and snap close 34 is in and reset button lead dislocation state under iron core 35 and iron core return-spring 36 effects;

With reference to Figure 11 and Figure 12, press reset button 2, last dropout part 19 descends and compresses spring 30, and then dropout part 33 is descended, the moving sheet metal 27 of simulation leakage current generating K switch 2 is pressed at following dropout part 33 edges, the presser feet of moving sheet metal 27 contacts with quiet sheet metal 29, produce the simulation leakage current, tripping coil produces the magnetic field relative with permanent magnet 16 like poles, because driving the part of groove, the iron core band is positioned at outside the magnetic field, the magnetic field that tripping coil produces spurs iron core to the right, and the left side wall driving snap close 34 that iron core drives groove moves right;

With reference to Figure 13 and Figure 14, when snap close 34 moves to and aligns with the reset button lead, continue to press down reset button 2, the detent 2C of reset button cooperates with snap close lockhole edge hook, the dropout part drives input moving contact 18B on this moment, 18A contacts with fixed contact on the output conductor, following dropout part 33 drives

output moving contact

24B, 24A separates (also can not separating) with fixed contact under the output conductor, simultaneously, insulating part 38 makes moving sheet metal 39 free ends of unit switch K3 contact with quiet sheet metal 37 under the effect of reset guide post, circuit board power switch closure, output conductor is charged;

With reference to Figure 15 and Figure 16, if mistake inserts power output end 15A with power line, 15B(is the reversal connection line states), this moment, the moving sheet metal 39 of unit switch K3 contacted with quiet sheet metal 40 on the framework of trip coil 11, power output end is through unit switch K3, tripping coil and output conductor directly form the loop, produce the moment leakage current, tripping coil produces the magnetic field relative with the permanent magnet synonyms pole, iron core under magnetic field effect with permanent magnet 16 adhesives, iron core drive snap close moves right and aligns with lockhole with the reset button lead, forbid resetting, during correct wiring, tripping coil magnetic field disappears again, iron core 35 is still by attracting state, press reset button, K switch 2 closures produce the simulation leakage current, iron core 35 moves to left under spring 36 effects, and snap close 34 drives under the effect of groove right side wall at iron core and moves to left;

With reference to Figure 17, for whether the detection life-span stops (electromagnetic trip mechanism is inoperative, as two induction coils, tripping coil, controllable silicon, IC damage etc.), if reset button has been in reset mode,

input moving contact

18B, 18A contact with

fixed contact

9A, 8A on the output conductor, testing button 3 by moving sheet metal 10 and the primary importance that driving Metallic rod 31 contacts to Test Switchboard K1, if can not trip, is illustrated that the life-span stops;

With reference to Figure 18; the earth leakage protective socket life-span stops; testing button 3 is pressed to the second place; namely drive step that Metallic rod 31 contacts with snap close along domatic decline; snap close leaves the sloping end of bench face until contacting with sloping end face; snap close 34 moves to right in this process; the snap close lockhole arrives and reset button lead positions aligning from the position that cooperates with reset button lead detent hook; reset button 2 is takeoff; input moving contact 18B; fixed contact 9A on 18A and the output conductor; 8A separates; output conductor is not charged; can not work owing to electromagnetic trip mechanism this moment; press reset button 2 and can not make snap close lockhole and reset button lead hook location, success therefore can't reset.

Embodiment two

The difference of present embodiment and embodiment one is: damage earth leakage protective socket in order to prevent thunderbolt; can a pair of discharge metal sheet be set at input; be provided with induction metal plate 17B in the housing; 17A; for saving mould; present embodiment induction metal plate 17B; the integrally formed discharge metal sheet 17M that is provided with of 17A; 17N; discharge metal sheet 17M; 17N has discharge tip or discharge cambered surface; discharge metal sheet 17M; the discharge tip of 17N or discharge cambered surface arrange in opposite directions and have a discharging gap; discharge metal sheet 17M; the sealing of big envelope that 17N is made up of base 13 and capping 12, big envelope effectively prevent from discharging sheet damage and have the effect of arc-extinguish chamber.

For further improving anti-thunderbolt effect,

input moving contact

18B, 18A are provided with a pair of discharge metal sheet 18N, the 18M that arranges in opposite directions,

discharge metal sheet

18N, 18M have discharge tip or discharge cambered surface, and the discharge tip of

discharge metal sheet

18N, 18M or discharge cambered surface arrange in opposite directions and have a discharging gap.

All the other structures and embodiment one are basic identical.

Though the present invention illustrates and describes by the reference preferred embodiment,, those of ordinary skills should understand, and can be not limited to the description of above-described embodiment, in the scope of claims, can do the various variations on form and the details.

Claims

1. have the earth leakage protective socket of backing protection function concurrently, comprise housing, conduct electricity the output conductor of sleeve a pair of having, reset button, power input, power output end, the a pair of input moving contact that is electrically connected with power input, the a pair of output moving contact that is electrically connected with power output end, can and be used for when producing leakage current electromagnetic trip mechanism with the snap close release with the snap close of reset button hook location, it is characterized in that: output conductor have two pairs be respectively up and down towards fixed contact, the input moving contact is positioned at output conductor fixed contact top up, and the output moving contact is positioned at output conductor fixed contact below and Elastic Contact down; Also be provided with the last dropout part that can drive the elevating movement of input moving contact and the following dropout part that can drive the elevating movement of output moving contact in the housing, be provided with between last dropout part and the following dropout part to move in the opposite direction and make the limiting component of the two interlock behind the certain distance and the flexible member of savings elastic potential energy when move toward one another, last dropout part and following dropout part are equipped with the through hole that passes for the reset button lead, the last dropout part button press that can be reset is descending, overcomes the flexible member resistance under following dropout part can drive by the domatic snap close in the unlocking direction horizontal movement that cooperatively interacts and rises; Described upward dropout part and following dropout part cooperate spacing by hook and the vertical slot that has limited step, be provided with back-moving spring between last dropout part and the following dropout part; Last dropout part and following dropout part drive respectively each self-corresponding moving contact under the driving of reset button respectively with the contact of fixed contact up and down of output conductor or separate.

2. the earth leakage protective socket that has backing protection function concurrently as claimed in claim 1, it is characterized in that: described electromagnetic trip mechanism comprises framework of trip coil, tripping coil, iron core, iron core return-spring and permanent magnet, framework of trip coil has the iron core containing tube, iron core containing tube outer wall coats tripping coil, and iron core is set in the pipe; The iron core front end has the driving groove, and snap close has the breach that snaps in for iron core driving groove.

3. the earth leakage protective socket that has backing protection function concurrently as claimed in claim 2, it is characterized in that: described iron core has the spring positioning step, and permanent magnet has the spring positioning step, and the iron core return-spring two ends are resisted against on two positioning steps.

4. the earth leakage protective socket that has backing protection function concurrently as claimed in claim 1, it is characterized in that: described housing comprises loam cake and drain pan, and circuit board is set in the drain pan; The circuit board top arranges capping; Framework of trip coil has downward opening storage tank, and framework of trip coil is fixedlyed connected with capping is removable.

5. the earth leakage protective socket that has backing protection function concurrently as claimed in claim 2 is characterized in that: described dropout part down is arranged in the framework of trip coil storage tank, and following dropout part is provided with the snap close mounting groove; Framework of trip coil below storage tank has the transition of doing descending motion when can make snap close be pulled to the iron core containing tube by iron core at the edge towards the iron core containing tube domatic; Snap close is provided with the lockhole that can cooperate with reset button lead front end step hook.

6. the earth leakage protective socket that has backing protection function concurrently as claimed in claim 2; it is characterized in that: described dropout part down has fin; storage tank inwall relevant position, framework of trip coil below arranges vertical slot, and following dropout part cooperates the liftable motion by fin with the vertical slot of framework of trip coil below storage tank inwall.

7. as each described earth leakage protective socket that has backing protection function concurrently of claim 2 to 6; it is characterized in that: described input moving contact stiff end is fixedly mounted in the mounting groove of framework of trip coil; by a pair of rib groove clamping of last dropout part and the interlock of last dropout part, input moving contact stiff end is electrically connected with power input and circuit board by flexible wire near free-ended position.

8. as each described earth leakage protective socket that has backing protection function concurrently of claim 2 to 6, it is characterized in that: described output moving contact is fixedly mounted on down in the mounting groove of dropout part, and the output moving contact is electrically connected with circuit board by flexible wire.

9. the earth leakage protective socket that has backing protection function concurrently as claimed in claim 1; it is characterized in that: also be provided with the simulation leakage current generating switch with the reset button interlock; simulation leakage current generating switch butt produced moment simulation leakage current and makes the electromagnetic trip mechanism action when reset button was pressed, and permission reset button lead passes the snap close lockhole and cooperates with lockhole edge hook.

10. the earth leakage protective socket that has backing protection function concurrently as claimed in claim 9; it is characterized in that: described simulation leakage current generating switch comprises the moving sheet metal that is set with back-moving spring and the quiet sheet metal that is plugged on the circuit board; back-moving spring is arranged in two extended mount pads of induction coil skeleton sidewall, and moving sheet metal has the presser feet that can contact with quiet sheet metal and the step of pressing that can contact cooperation with following dropout part.

11. as each described earth leakage protective socket that has backing protection function concurrently of claim 2 to 6; it is characterized in that: also be provided with a unit switch that function is two-in-one; comprise elastic sheet metal; be plugged on quiet sheet metal and the quiet sheet metal that is plugged on the framework of trip coil on the circuit board; two quiet sheet metals all are electrically connected with circuit board; the elastic sheet metal stiff end is plugged on the circuit board; free end is withheld with the insulating part of reset button interlock by one; the elastic sheet metal free end contacts with quiet sheet metal as power output end and output conductor a channel selector between mutually wherein under the nature; after reset button successfully resets, when the reset button lead is depressed insulating part elastic sheet metal is contacted with quiet sheet metal as the circuit board power switch.

12. the earth leakage protective socket that has backing protection function concurrently as claimed in claim 11; it is characterized in that: described reset button lead can contact cooperation with insulating part; insulating part has fin; the storage tank of following dropout part below is provided with the vertical slot with the insulating part fin, and insulating part is by storage tank and the elastic sheet metal of dropout part below cooperate the location down.

13. as each described earth leakage protective socket that has backing protection function concurrently of claim 2 to 6; it is characterized in that: comprise that also testing button reaches the Test Switchboard for generation of moment simulation leakage current; Test Switchboard comprises elastic sheet metal; drive Metallic rod and be plugged on quiet sheet metal on the circuit board; the elastic sheet metal stiff end is arranged on the housing fixed bit; it is spacing to be output one of conductor near free-ended position; free end is corresponding with testing button lead position; elastic sheet metal is electrically connected with circuit board, drives Metallic rod and is electrically connected with quiet sheet metal by flexible wire.

14. the earth leakage protective socket that has backing protection function concurrently as claimed in claim 13 is characterized in that: drive Metallic rod and have the kink that is with back-moving spring, kink and back-moving spring are arranged in the mount pad of framework of trip coil; Drive the Metallic rod lower end and have the step that cooperates away from iron core one side with snap close, it is domatic that the step of driving Metallic rod and snap fit has transition.

15. the earth leakage protective socket that has backing protection function concurrently as claimed in claim 1, it is characterized in that: be provided with the induction metal plate that passes two induction coils in the housing, the integrally formed discharge metal sheet that is provided with of induction metal plate, discharge metal sheet on the induction metal plate has discharge tip or discharge cambered surface, and the discharge tip of discharge metal sheet or discharge cambered surface arrange in opposite directions and have a discharging gap; The big envelope sealing that the discharge metal sheet is made up of base and capping.

16. the earth leakage protective socket that has backing protection function concurrently as claimed in claim 1; it is characterized in that: the input moving contact is provided with a pair of discharge metal sheet that arranges in opposite directions; the discharge metal sheet of input on the moving contact has discharge tip or discharge cambered surface, and the discharge tip of discharge metal sheet or discharge cambered surface arrange in opposite directions and have a discharging gap.

17. as claim 5 or the 6 described earth leakage protective sockets that have backing protection function concurrently, it is characterized in that: described snap close has kink, snap close is used for being positioned at snap close bending ridge position with the breach of iron core driving groove fit; Framework of trip coil is used for the domatic snap close bending ridge top that is arranged on of release.