CN2560124Y

CN2560124Y - Leakage protection socket

Info

Publication number: CN2560124Y
Application number: CN 02243496
Authority: CN
Inventors: 李成力
Original assignee: Shanghai Meihao Electric Inc
Current assignee: Shanghai Meihao Electric Inc
Priority date: 2002-08-07
Filing date: 2002-08-07
Publication date: 2003-07-09
Anticipated expiration: 2012-08-07

Abstract

The utility model discloses an electric leakage protection socket, comprising an upper cover, a middle support and a base seat. A grounding metal mounting panel is arranged between the upper cover and the middle support, and a circuit board is arranged between the middle support and the base seat; the two sides of the middle support are provided with a pair of socket output metal conductors; the circuit board is provided with an elastic input metal plate, a differential transformer used for detecting the leakage current, a coil internally provided with an iron core, a reset guide component and an elastic unlock switch. The elastic input metal plate connected with the power input terminal of the socket is provided with two pairs of electrical contacts; one pair of the electrical contacts corresponds to the electrical contact of the output metal conductor of the socket in the middle support, and the other pair corresponds to the electrical contact of the power output metal plate in the base seat. The utility model which is arranged in the output box on normal wall has the function of electric leakage protection and can avoid the security threat against human body and household appliance caused by damaged element or wrong installation and connection.

Description

Earth leakage protective socket

Technical field

The utility model relates to a kind of socket with creepage protection function, refers to a kind of being installed in the common metope especially, has the socket of creepage protection function.

Background technology

Along with improving constantly of people's living standard, the safe in utilization of household electrical appliance is subject to people's attention day by day, and when the hope that people are urgent was built in the room, the supply socket of reserving in the wall was the supply socket of safety.But the socket of being installed in the wall of present most of rooms is common socket, does not have creepage protection function, has hidden danger during use; Though the socket that has has creepage protection function, but still there is following shortcoming:

1, after the in use a certain component wear of earth leakage protective socket, the earth leakage protective socket escape, after depressing reset button and making it to reset, the input of earth leakage protective socket, output still can connect by electric power.

If 2 when mounted; installation personnel is the power input line reversal connection; that is to say and correctly to distinguish power input line and output line in the metope delivery casing; power input line is received the earth leakage protective socket output mistakenly; and when power supply output line received the earth leakage protective socket input; the input of earth leakage protective socket, output still can connect by electric power; but at this moment earth leakage protective socket not only can not play earth leakage protective function; and the easiest misleading user continues to use, and causes the damage of personal injury and household electrical appliance.

Summary of the invention

In view of the foregoing, the purpose of this utility model provides and a kind ofly is suitable for being installed in the common metope delivery casing, safe in utilization and has the earth leakage protective socket of creepage protection function.Wiring mistakenly when the inner a certain original paper of earth leakage protective socket damages or installs, this earth leakage protective socket can stop power input to be connected with the electric power of output; And when power line reversal connection during to output, the output of earth leakage protective socket output no-voltage, thereby the guiding setter just can reset only when correct wiring, and the socket output just has voltage output, guarantees to install correct, safe in utilization.

To achieve these goals, the utility model adopts following design: a kind of earth leakage protective socket, it is mainly combined by loam cake, middle layer bracket and base, and a metal mounting panel is installed between loam cake and middle layer bracket, and a circuit board is installed between middle layer bracket and base;

Cover on described and be provided with power output socket, analogue test button and reset button;

Described metal mounting panel is provided with grounding contact, and this grounding contact links to each other with the grounding pin of power output socket by the hole of loam cake;

The both sides of described middle layer bracket are placed with a pair of socket output metallic conductor; Two sockets output metallic conductor respectively with on live wire, the zero line jack of the power output socket that covers corresponding; Be respectively equipped with electrical contact on two metallic conductors, this electrical contact is corresponding with the electrical contact that the elasticity on the circuit board is imported on the sheet metal; Horizontal between power supply output metallic conductor and analogue test button have a test film;

Described circuit board is provided with a pair of four elasticity input sheet metal, and is used to detect the differential differentiating transformer of leakage current, the coil that is built-in with iron core, reset guide assembly and elasticity unlock switch;

Described elasticity input sheet metal is positioned at the both sides of reset guide assembly central perforation and passes differential differentiating transformer and links to each other with power input; Described elasticity input sheet metal is provided with two pairs of electrical contacts, a pair of electrical contact is corresponding with a pair of electrical contact that the socket in the described middle layer bracket is exported on the metallic conductor, and another is corresponding with a pair of electrical contact of the power output end sheet metal that is positioned at described base to electrical contact;

Described base is used to place described circuit board and middle layer bracket; The both sides of base are respectively equipped with a pair of power supply input wires screw and a pair of power supply output connection screw of symmetry; Described power supply input wires screw is imported sheet metal with the elasticity on the circuit board and is linked to each other; Described power supply output connection screw links to each other with power output end sheet metal in the base.

Described reset guide assembly is a cylinder, and it is positioned at described reset button below; Its top is provided with a central perforation; Its underpart is provided with " L " type of movably being made by metal material and locks as parts, and the central authorities of lock buckling part are provided with a perforation; In the reset guide component internal, vertically run through central perforation, be provided with a guiding lock; The bottom of guiding lock is the plane, near the bottom the one calm groove that caves in is arranged, and the top of guiding lock is with a spring and embeds reset button inside;

Between side of described reset guide assembly and lock buckling part, be provided with a spring.

Described unlock switch is between reset guide assembly and wiring board, and it is made by elastic metallic material, and the one end welds in the circuit board, and the other end dashes the round dot that convex is arranged, and the contact that this round dot and is fixed on the circuit board is corresponding; The two ends of described unlock switch are passed differential differentiating transformer and are connected on the earth leakage protective socket power input zero line by a resistance.

Be provided with a test resistance below described analogue test button, an end of resistance links to each other with power supply input zero line.

Because the utility model adopts above technical scheme, make earth leakage protective socket in use and when mounted, can protect the safety of the person and household electrical appliance more reliably.

Description of drawings

Fig. 1 is a perspective exploded view of the present utility model

Fig. 2 is the utility model front view

Fig. 3 removes front view behind the loam cake for the utility model

Fig. 4 is the utility model interior circuit board assembly schematic diagram

Fig. 5 among Fig. 3 along A-A to cutaway view promptly stop power input and output electric power catenation principle figure

Fig. 5 B among Fig. 3 along B-B to cutaway view promptly stop power input and output electric power catenation principle figure

Fig. 6 among Fig. 3 along A-A to cutaway view be power input and output electric power catenation principle figure

Fig. 6 B among Fig. 3 along B-B to cutaway view be power input and output electric power catenation principle figure

Fig. 7 among Fig. 3 along A-A to cutaway view be power input and output disconnection catenation principle figure

Fig. 7 B among Fig. 3 along B-B to cutaway view be power input and output disconnection catenation principle figure

Fig. 8 is the utility model circuit board physical circuit schematic diagram

Embodiment

As shown in Figure 1, the utility model is mainly combined by loam cake 2, middle layer bracket 3 and base 4; One metal mounting panel 1 is installed between loam cake 2 and middle layer bracket 3, a circuit board 18 is installed between middle layer bracket 3 and base 4.Wherein:

As shown in Figure 2, loam cake 2 is provided with two power output sockets 5 and 6, analogue test buttons 7 (TEST) and a reset button 8 (RESET);

Be provided with a metal mounting panel 1 between loam cake 2 and middle layer bracket 3, mounting panel is provided with grounding

contact

11 and 12, and its hole by loam cake 2 links to each other with the grounding pin of power output socket 5,6.

As shown in Figure 3, be respectively equipped with a pair of socket output

metallic conductor

13,14 in the both sides of middle layer bracket 3, the

corresponding metal blade

60,61,62,63 in power output socket 5,6 phase line holes being respectively equipped with on the

output conductor

13,14 on a pair of and the loam cake 2 also is respectively equipped with

electrical contact

15,16 on the

metallic conductor

13,14; Horizontal between output conductor 14 bottoms and analogue test button 7 in addition have a test film 40;

As shown in Figure 1, base 4 is used to hold middle layer bracket 3 and circuit board as shown in Figure 4 18.Monosymmetric a pair of power supply input wires screw 9 (HOT), 10 (WHITE) and a pair of power supply output connection screw 109 (HOT), 110 (WHIIE) of being provided with at base 4.In base 4, be provided with a pair of power output

end sheet metal

80,81 that links to each other with power supply output connection screw 109,110, on 80,81, be provided with two

electrical contacts

52,53.

As Fig. 4, shown in Figure 5, the circuit board 18 that is installed in the base 4 is provided with the differential differentiating transformer 19 that can detect leakage current; A pair of four power supply input

flexibility sheet metals

20,50,21,51; One is built-in with the coil 26 of iron core 42; An one reset guide assembly 28 and a flexible type unlock switch 37.Wherein:

One end of four power supply input

flexibility sheet metals

20,50,21,51 is respectively equipped with

electrical contact

22,55,23,54, and the other end passes differentiating transformer 19 and is connected with power

supply input screw

9,10 by input terminal 24,25;

Electrical contact

22,23 on the power supply input flexibility sheet metal is corresponding with the

electrical contact

15,16 that the socket on the middle layer bracket 3 is exported

metallic conductor

13,14;

Electrical contact

55,54 on the power supply input flexibility sheet metal is corresponding with the

electrical contact

52,53 on base 4 interior power output end (LOAD)

sheet metals

80,81.

Also be provided with the coil 26 that inside is placed with iron core 42 on wiring board 18, be provided with a test resistance 27 below loam cake analogue test button 7, an end of resistance links to each other with power supply input zero line;

With reference to shown in figure 5, Fig. 5 B, the reset guide assembly 28 on the circuit board 18 is positioned at the below of reset button 8, the below of input

flexibility sheet metal

20,50,21,51 again, and reset guide assembly 28 tops are provided with a central perforation 29; Reset guide assembly 28 bottoms are provided with " L " type lock buckling part 30 of movably being made by metal material; The central authorities of lock buckling part 30 are provided with a perforation 31; Between side of reset guide assembly 28 and lock buckling part 30, be provided with a circular recess 33, a built-in spring 34; In reset guide assembly 28 inside, vertically run through in the central perforation 29, be provided with a guiding lock 35, the bottom of guiding lock 35 is plane 41, near the bottom lock slots 36 of one depression is arranged, the top of guiding lock 35 is with a spring 91, and embeds reset key 8 inside.

With reference to shown in the figure 5B, be provided with the unlock switch 37 that a usefulness elastic metallic material is made between reset guide assembly 28 and wiring board 18 again, the one end is welded on the wiring board 18, and the other end dashes the round dot 39 that convex is arranged, round dot 39 following corresponding contacts 38.Unlock switch 37, contact 38 are passed on the zero line (WHITE) 10 that differentiating transformer is connected earth leakage protective socket power input (LINE), are used for checking whether the earth leakage protective socket inner member damages, whether power supply input, output wiring obscure.

Fig. 5～Fig. 8 realizes the principle schematic that earth leakage protective and input, output power connect for the utility model.

As Fig. 5, Fig. 5 B, Fig. 6, Fig. 6 B, shown in Figure 8, during the utility model operate as normal, pressing reset button 8 moves down the guiding lock 35 that is attached thereto, and drive reset guide assembly 28 moves down, the plane 41 of guiding lock 35 just is pressed on the lock buckling part 30, because reset guide assembly 28 moves downward, and makes the

round dot

39 and 38 conductings of flexible unlock switch 37.As shown in Figure 8, because unlock switch 37 passes differential differentiating transformer, the closure of switch 37 makes differential differentiating transformer detect and produce voltage output, make the controllable silicon SCR conducting by integrated electric IC output control signal, coil 26 is charged, produces magnetic field, attracts iron core 42 bump lock buckling parts 30, make it mobile, the central perforation 31 that the base plane 41 of guiding lock 35 is passed lock buckling part; Simultaneously, because the inertia of

elasticity unlock switch

37,37 pop up, and the two ends 39 of

unlock switch

37 and 38 disconnect, and no current passes through in the coil 26, and magnetic field disappears; Spring 34 between lock buckling part 30 and the reset guide assembly 28 back moves lock buckling part 30; Because the shell fragment 39 of elasticity unlock switch 37 pops up, make the central perforation 31 of lock buckling part 30 be slipped in the lock slots 36 of guiding lock 35, again because the release of the spring 91 on guiding lock 35 tops, reset guide assembly 28 moves up, contact 22,55,23,54 on the input

flexibility sheet metal

20,50,21,51 and output on the

metallic conductor

13,14

electrical contact

15,16 and the

electric contact

52,53 on the power output end (LOAD) 80,81 link to each other simultaneously, realize the electric power connection of power input, output;

Fig. 5, Fig. 5 B, Fig. 8 are that earth leakage protective socket stops power input and output electric power catenation principle schematic diagram when exporting reversal connection when a certain component wear in the utility model earth leakage protective socket or with the power supply input with power supply.When a certain component wear of earth leakage protective socket itself; for example the capacitor C among Fig. 85 is damaged; even press reset button 8;

unlock switch contact

39 and 38 closures; controllable silicon SCR can not conducting; coil 26 does not have electric current to flow through; iron core 42 can not clash into lock buckling part 30; the plane 41 of guiding lock 35 is pressed on the snap close 30 all the time like this; the unlock switch 37 reset guide assembly 28 of can not upspringing makes the flexure strip 20 of input; 50; 21; contact 22 on 51; 55; 23; 54 and socket output conductor 13; contact 15 on 14; 16 and output (LOAD) conductor 80; contact 52 on 81; 53 remain off-state.See Fig. 8 again; if earth leakage protective socket when mounted; mistake a pair of power supply input lead is connected on power output end (LOAD) 109; on 110; even earth leakage protective socket itself is intact; depress two

ends

39 and 38 closures that the knob 8 that resets makes unlock switch 37; SCR can not conducting; coil 26 no currents flow through; inner iron core 42 can not clash into lock buckling part 30; the plane 41 of guiding lock 35 is pressed on the lock buckling part 30 all the time like this; the unlock switch 37 reset guide assembly 28 of can not upspringing; make input flexibility sheet metal 20; 50; 21; 51 contact 22; 55; 23; 54 with output conductor 13; contact 15 on 14; 16 and power supply output (LOAD) conductor 80; contact 52 on 81; 53 remain off-state, and power supply input (LINE) end is connected with socket output unregulated power.

As Fig. 7, Fig. 7 B, shown in Figure 8, when the utility model utilizes differential differentiating transformer to detect leakage current, the controllable silicon SCR conducting, coil 26, produce magnetic field, iron core 42 bump lock buckling parts 30, promoting lock buckling part 30 moves, lock slots 36 on the guiding lock 35 skids off from the medium pore 31 of lock buckling part 30, reset button 8 led the lock 35 top springs 91 effect takeoff, reset guide assembly 28 falls, input

flexibility sheet metal

20,50,21, contact 22 on 51,55,23,54 with socket output conductor 13, contact 15 on 14,16 and power supply output conductor (10AD) 80, contact 52 on 81,53 separate, thereby have interrupted the power supply input, the electric power of output connects.

When the user wants to disconnect the input of earth leakage protective socket power supply; when the electric power of output connects; depress analogue test button 7; make test film 40 and test resistance 27 conductings; when differential differentiating transformer detects the simulation leakage current; the controllable silicon SCR conducting; coil 26; produce magnetic field; iron core 42 bump lock buckling parts 30; promoting lock buckling part 30 moves; lock slots 36 on the guiding lock 35 skids off from the medium pore 31 of lock buckling part 30; reset button 8 led the lock 35 top springs effect takeoff; reset guide assembly 28 falls input flexibility sheet metal 20; 50; 21; contact 22 on 51; 55; 23; 54 with output conductor 13; contact 15 on 14; 16 and power supply output (LOAD) conductor 80; contact 52 on 81; 53 separate, thereby have interrupted the power supply input; the electric power of output connects.

Claims

1, a kind of earth leakage protective socket is characterized in that: it is mainly combined by loam cake, middle layer bracket and base, and a metal mounting panel is installed between loam cake and middle layer bracket, and a circuit board is installed between middle layer bracket and base;

2, earth leakage protective socket according to claim 1 is characterized in that: described reset guide assembly is a cylinder, and it is positioned at described reset button below; Its top is provided with a central perforation; Its underpart is provided with " L " type of movably being made by metal material and locks as parts, and the central authorities of lock buckling part are provided with a perforation; In the reset guide component internal, vertically run through central perforation, be provided with a guiding lock; The bottom of guiding lock is the plane, near the bottom the one calm groove that caves in is arranged, and the top of guiding lock is with a spring and embeds reset button inside;

3, earth leakage protective socket according to claim 2, it is characterized in that: described unlock switch is between reset guide assembly and wiring board, it is made by elastic metallic material, the welding of one end in the circuit board, the other end dashes the round dot that convex is arranged, and the contact that this round dot and is fixed on the circuit board is corresponding; The two ends of described unlock switch are passed differential differentiating transformer and are connected on the earth leakage protective socket power input zero line by a resistance.

4, earth leakage protective socket according to claim 1 is characterized in that: be provided with a test resistance below described analogue test button, an end of resistance links to each other with power supply input zero line.