CN101645566A - Leakage protection socket - Google Patents
Leakage protection socket Download PDFInfo
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- CN101645566A CN101645566A CN 200810118069 CN200810118069A CN101645566A CN 101645566 A CN101645566 A CN 101645566A CN 200810118069 CN200810118069 CN 200810118069 CN 200810118069 A CN200810118069 A CN 200810118069A CN 101645566 A CN101645566 A CN 101645566A
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Abstract
The invention discloses a novel leakage protection socket, which is characterized in that: when a reset button is pressed down, the reset button and a test button are linked; an elastic sheet metal isarranged below the test button, and a test resistor is arranged below the elastic sheet metal; one end of the elastic sheet metal is positioned below the test button, while the other end is connectedwith a power live wire or a power zero line passing through a differential transformer; one end of the test resistor is positioned below the elastic sheet metal in a hanging way, while the other endis connected with the power zero line of a power input end; when the reset button is in a released state and a reset state, the test resistor and the elastic sheet metal are not contacted; and when the reset button is pressed down, the test resistor and the elastic sheet metal are contacted. When the power input end of the leakage protection socket is connected with a power cord in a wall, the test button is linked when the reset button is pressed, and the test button automatically detects timely whether the leakage protection socket still has a leakage protection function or not and displaysa detection result.
Description
Technical field
The present invention relates to a kind ofly have by pushing reset button interlock testing button, detect whether end-of-life and show the new type electric leakageproof socket of testing result of earth leakage protective socket automatically in the very first time by testing button.
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 invention 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 present invention 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 present invention 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 is pressed, reset button and testing button interlock;
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 power input of the present invention and the wall connects; whether interlock testing button when pushing reset button still has creepage protection function to earth leakage protective socket by testing button automatically in the very first time and detects and show testing result.Fail safe of the present invention 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 present invention;
Fig. 2 is a front view of the present invention;
Fig. 3 is the front view after the present invention removes loam cake;
Fig. 4-1, Fig. 4 the-the 2nd, the annexation schematic diagram between power supply input sheet metal of the present invention, power supply output sheet metal, the elastic sheet metal;
Fig. 5 is that each module position concerns schematic diagram on the circuit board of the present invention;
Fig. 6 is the present invention's 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 reset power 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 starting switch view resets;
Fig. 9-the 2nd, the A-A partial sectional view of Fig. 3, the moment that reset button is pressed, the starting switch view resets;
Fig. 9-the 3rd, the A-A partial sectional view of Fig. 3, during the reset button reset mode, the starting switch view resets;
Figure 10-the 1st, the embodiment of the invention one is pressed 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 embodiment of the invention two control circuit physical circuit figure;
Figure 10-the 3rd, the embodiment of the invention three control circuit physical circuit figure;
Figure 10-the 4th, the embodiment of the invention four control circuit physical circuit figure.
Embodiment
As shown in Figure 1, new type electric leakageproof socket disclosed by the invention 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 invention 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 contacts with a pair of fixed contact 16,15 on the power output end 81,80 or disconnects, and constitutes one group of live wire, zero line mains switch; On the power output end 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 group 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, 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, 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 starting switch 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, and 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, resetting pad 28A again can be separated from one another with release 28.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 (referring to Fig. 9-1～Fig. 9-3).
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.
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, shown in Fig. 6, Fig. 7-1, Fig. 8-1, Fig. 9-1, 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.As shown in Figure 6, 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.
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.
Sidewall at release 28 is provided with snap close 30.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 placed with spring 42A.
Shown in Fig. 6, Fig. 7-1, reset button 8 of the present invention 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 power firestreak that passes differential differentiating transformer 19 or zero-power line; 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 present invention presses reset button earlier.
Shown in Fig. 6, Fig. 7-1, Fig. 9-1, below release 28, be provided with a starting switch that resets that links with reset button (RESET) 8, this starting switch that resets is made of sheet metal 67,72 and hard contact 72A.
Above hard contact 72A, the lower surface of elastic sheet metal 72 1 ends is provided with a contact 72C, is provided with a contact 68A at the upper surface of elastic sheet metal 72 1 ends; Above the 68A of contact, the lower surface of sheet metal 67 is provided with a contact 67A.Shown in Figure 10-1～Figure 10-4, contact 67A, 68A constitute a K switch R-1, and contact 72A, 72C constitute another K switch R-4.
Shown in Fig. 7-1, Fig. 9-1, when reset button 8 was trip status, contact 67A, 68A, 72C, 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, contact 67A, 68A still are off-state, contact 72C, 72A contact conducting, and promptly K switch R-1 is off-state, and KR-4 is closure state, 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 was reset mode, contact 67A, 68A contacted conducting, and contact 72C, 72A are off-state, and promptly K switch R-1 is closure state, and 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, contact 67A, 68A, 72C, 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, elastic sheet metal 67 is provided with that an end of contact is unsettled, and the other end is welded on the circuit board, links to each other with the power input zero line with controllable silicon V4 series connection back on the control circuit board 18; It is unsettled that elastic sheet metal 72 is provided with an end of contact, 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; 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 starting switch 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 starting switch 67,72 that resets, 72A and tripping coil 26 with reset button 8 interlocks be connected mutually become one can the freedom activity integral body, they are fitted to each other, and are indispensable.
Fig. 6 is the present invention's 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.For example, 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 earth leakage protective socket control circuit physical circuit figure of the present invention.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; with the testing button TEST switch (46,47) of the reset button RESET interlock starting switch KR-1 that 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 starting switch 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; Constitute contact 72C, the 72A contact conducting of the starting switch that resets, 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; Contact 72A, the 72C of starting switch of resetting disconnects, and contact 67A contact conducting with 68A, K switch R-4 disconnection, 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 GFCI 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, and 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; the present invention extends discharge metal sheet 25A, the 24A of a right angle trigonometry shape that is used to discharge respectively on earth leakage protective socket and power supply input wires sheet 25,24 that power firestreak, zero line input wires screw 10,9 link to each other; the two metal sheets tip is staggered relatively, and keeps 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 embodiments of the invention, 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 present invention 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 present invention 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 embodiments of the invention and the know-why used, and is any based on the equivalent transformation on the technical solution of the present invention basis, all belongs within the protection range of the present invention.
Claims (9)
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, is used to detect leakage current, it is characterized in that:
When being pressed, reset button (8) and testing button (7) link in described reset button (8);
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, and earth leakage protective socket is carried out life-span stop detection.
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 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 reset button starting switch that resets interlock, surperficial 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 is characterized in that: the top diameter of described 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), is 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 starting switch that resets is positioned at the below of release (28), links with reset button (8);
This starting switch that resets is made of two sheet metals (67,72) and hard contact (72A);
Hard contact (72A) is positioned at below; In the middle of one of them sheet metal (72) was positioned at, this sheet metal can move up and down with release (28); Another sheet metal (67) is positioned at the top;
Be provided with a contact (72C) at the top of hard contact (72A), the lower surface of sheet metal (72) one ends, be provided with a contact (68A) at the upper surface of sheet metal (72) one ends; The lower surface of the top of (68A), sheet metal (67) is provided with a contact (67A) in the contact; Contact (67A, 68A) constitutes a switch (KR-1), and contact (72A, 72C) constitutes another switch (KR-4);
When being trip status, contact (67A, 68A, 72C, 72A) all is 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 interlock testing button moves down, elastic sheet metal (46) contacts with test resistance (47), contact (67A, 68A) still is an off-state, contact (72C, 72A) contact conducting, promptly switch (KR-1) is off-state, (KR-4) is closure state, the mechanical device that resets/trip action, supply socket still do not have power supply output;
When being reset mode, test resistance (47) and elastic sheet metal (46) disconnect in reset button (8), and contact (67A, 68A) contacts conducting, (72C, 72A) is off-state in the contact, 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: constituting sheet metal starting switch, that be positioned at the centre position (67) that resets, to be provided with an end of contact unsettled, the other end is welded on the circuit board, links to each other with the power input zero line with controllable silicon (V4) series connection on the control circuit board (18) is back; It is unsettled that elastic sheet metal (72) is provided with an end of contact, 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); 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 (81) is provided with two fixed contacts (53 and 16); Be provided with two fixed contacts (52 and 15) in the end of zero-power line output (80)
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 (14 and 13) respectively; An end of the conductive metal sheet of a side (14) riveted joint therein has 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) contacts with a pair of fixed contact (16,15) on the power output end (81,80) or disconnects, and constitutes one group of live wire, zero line mains switch; On the power output end (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 group 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: on earth leakage protective socket and power input that power firestreak, zero line input wires screw (10,9) link to each other, extend a point discharge sheet metal right angle trigonometry shape, that be used to discharge respectively; the two metal sheets tip is staggered relatively, and keeps certain intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810118069 CN101645566B (en) | 2008-08-07 | 2008-08-07 | Leakage protection socket |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810118069 CN101645566B (en) | 2008-08-07 | 2008-08-07 | Leakage protection socket |
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| Publication Number | Publication Date |
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| CN101645566A true CN101645566A (en) | 2010-02-10 |
| CN101645566B CN101645566B (en) | 2013-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810118069 Expired - Fee Related CN101645566B (en) | 2008-08-07 | 2008-08-07 | Leakage protection socket |
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| CN (1) | CN101645566B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102457042A (en) * | 2010-10-26 | 2012-05-16 | 黄华道 | Novel electricity leakage detection protection circuit |
| CN105161932A (en) * | 2015-08-26 | 2015-12-16 | 惠州Tcl移动通信有限公司 | Push-type switching device and electronic equipment |
| CN105322328A (en) * | 2015-11-12 | 2016-02-10 | 宁波瑞祥电器有限公司 | Wiring board |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2560125Y (en) * | 2002-08-07 | 2003-07-09 | 上海美好电器有限公司 | Leakage protection socket |
| CN2743962Y (en) * | 2004-10-30 | 2005-11-30 | 陈贵 | Socket type grounding damage line circuit breaker with reverse connecting protection function |
| CN101047294B (en) * | 2006-03-31 | 2010-12-01 | 黄华道 | Leakage protection socket |
-
2008
- 2008-08-07 CN CN 200810118069 patent/CN101645566B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102457042A (en) * | 2010-10-26 | 2012-05-16 | 黄华道 | Novel electricity leakage detection protection circuit |
| CN102457042B (en) * | 2010-10-26 | 2015-05-20 | 黄华道 | Novel electricity leakage detection protection circuit |
| CN105161932A (en) * | 2015-08-26 | 2015-12-16 | 惠州Tcl移动通信有限公司 | Push-type switching device and electronic equipment |
| CN105322328A (en) * | 2015-11-12 | 2016-02-10 | 宁波瑞祥电器有限公司 | Wiring board |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101645566B (en) | 2013-07-24 |
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