CN200953413Y - Electrical leakage protection socket with service life stopping detection and detection result prompting function - Google Patents
Electrical leakage protection socket with service life stopping detection and detection result prompting function Download PDFInfo
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- CN200953413Y CN200953413Y CN 200620007903 CN200620007903U CN200953413Y CN 200953413 Y CN200953413 Y CN 200953413Y CN 200620007903 CN200620007903 CN 200620007903 CN 200620007903 U CN200620007903 U CN 200620007903U CN 200953413 Y CN200953413 Y CN 200953413Y
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Abstract
The utility model discloses an electric leakage protection socket with the EOL detection function, which is characterized in that the a socket circuit board is added with a pair of elastic metal pieces connected with the power output end, and the metal piece is provided with a pair of moving contacts; the power output conductor is provided with two pairs of fixed contacts; the two pairs of fixed contacts of the power output conductor are respectively corresponding with the moving contact of the power input metal piece and the moving contact of the elastic metal piece to form two groups, namely four pairs of switches. The circuit board is also provided with a tripping device which can make the socket release or trip to order to cut off the power output of the socket. The circuit board is also added with an EOL detection circuit, and the test button TEST must be firstly pressed to detect whether the electric leakage protection socket is EOL when the socket is connected to the power supply; whether the user hears the voice of ''Da'', the reset button is prevented to reset if the EOL of the socket is found. The utility model has the complete function, the good security and the convenient use, and therefore can assuredly ensure the personnel safety of the user and the electrical safety.
Description
Technical field
The utility model relates to a kind of earth leakage protective socket, refers to a kind of earth leakage protective socket life end checking function and testing result prompt facility, that also can use mechanical structure to thread off by force that has especially.
Background technology
Along with the continuous development of earth leakage protective socket (being called for short GFCI) industry, people require more and more higher to the safety in utilization of earth leakage protective socket.Hope is in the earth leakage protective socket use, and its inner components and parts lost efficacy when its end-of-life, during the forfeiture creepage protection function, can in time remind the user, changes new product.Yet; common in the market earth leakage protective socket does not have life end checking function; whether the user can't detect its end-of-life before using earth leakage protective socket; so; occurred when earth leakage protective socket end-of-life; the user is still still unaware; continue to use; push its reset button; 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.When leaky occurring,, very easily cause the get an electric shock generation of dead accident of user because this earth leakage protective socket do not had any protective effect.
Summary of the invention
In view of the foregoing, main purpose of the present utility model provides a kind of earth leakage protective socket with life end checking function and testing result prompt facility.Specifically, before the user uses this earth leakage protective socket, must push testing button earlier, the earth leakage protective socket inner member is detected, detect whether end-of-life of earth leakage protective socket; When earth leakage protective socket is intact, working properly, then can send the sound of " rattling away ", show that earth leakage protective socket passes through to detect, push reset button again, reset button can reset, and the single-phase three-wire power supply output plughole of the load output of earth leakage protective socket and receptacle face all has power supply output; After pushing testing button; do not send the sound of " rattling away "; show that promptly this earth leakage protective socket is not by detecting; this earth leakage protective socket has not had creepage protection function, end-of-life; the utility model stops reset button to reset; 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, avoided when leaky occurring because of earth leakage protective socket end-of-life the generation of dead accident but its user who still has power supply output to cause gets an electric shock.
Another purpose of the present utility model provides a kind of earth leakage protective socket with mechanical tripping function.In use, components and parts burn-out life in earth leakage protective socket stops, and can not can make earth leakage protective socket tripping operation/dropout mechanically when pushing testing button simulation leakage current and make it to trip, and cuts off its power supply by force and exports.
For achieving the above object, the utility model is by the following technical solutions: a kind of earth leakage protective socket with life-span stop detection and testing result prompt facility, it by housing, be installed in the earth leakage protective socket realized in the housing and have/circuit board of unregulated power output constitutes; It is characterized in that: the differential differentiating transformer that elasticity power firestreak input sheet metal, elasticity zero-power line input sheet metal are installed, is used to detect leakage current on described circuit board with control the tripgear whether this elasticity power firestreak, zero line input sheet metal and socket power output conductor contact;
Described socket power output conductor comprises the power firestreak output that is with power firestreak output connection screw that is welded on the circuit board, be welded on the zero-power line output that is with zero-power line output connection screw on the circuit board and be arranged on power firestreak output conductor, the zero-power line output conductor of housing middle layer bracket both sides;
One end of power firestreak input sheet metal passes described differential differentiating transformer and is welded on the circuit board, links to each other with power firestreak in the wall by power firestreak input wires screw, and the other end is provided with a moving contact; One end of zero-power line input sheet metal passes described differential differentiating transformer and is welded on the circuit board, links to each other with zero-power line in the wall by zero-power line input wires screw, and the other end is provided with a moving contact;
The power firestreak output is welded on the circuit board with the elastic sheet metal contact that is arranged on circuit board top, and links to each other with power firestreak output connection screw, is provided with a moving contact at the other end of elastic sheet metal; The zero-power line output is welded on the circuit board with the elastic sheet metal contact that is arranged on circuit board top, and links to each other with zero-power line output connection screw, is provided with a moving contact at the other end of elastic sheet metal;
The power firestreak output conductor that is arranged on housing middle layer bracket both sides is provided with two sheet clip leaf wings, and two sheet clip leaf wings pass from the firewire jack of two supply hubs of receptacle face respectively; Be arranged on the zero-power line output conductor of housing middle layer bracket both sides and also be provided with two sheet clip leaf wings, two sheet clip leaf wings pass from the zero line jack of two supply hubs of receptacle face respectively;
On the power firestreak output conductor, be provided with two fixed contacts; On the zero-power line output conductor, be provided with two fixed contacts;
Moving contact on the power firestreak input sheet metal contact with the fixed contact on the power firestreak output conductor/or a pair of mains switch of disconnection formation; Moving contact on the elastic sheet metal contacts with fixed contact on the power firestreak output conductor/or disconnect and constitute a pair of mains switch; Moving contact on the zero-power line input sheet metal contact with the fixed contact on the zero-power line output conductor/or a pair of mains switch of disconnection formation; Moving contact on the elastic sheet metal contacts with fixed contact on the zero-power line output conductor/or disconnect and constitute a pair of mains switch; Come to four pairs of contacts and constitute live wire, two groups of four pairs of switches of zero line;
Power firestreak input sheet metal and elastic sheet metal are positioned at a side of tripgear; Zero-power line input sheet metal and elastic sheet metal are positioned at the opposite side of tripgear; And can be with the tripgear upper and lower displacement.
Position above moving contact on the described power firestreak input sheet metal and the moving contact on the elastic sheet metal are carried arm in the tripgear side is cross one another; Position above moving contact on the described zero-power line input sheet metal and the moving contact on the elastic sheet metal are carried arm in the tripgear side also is mutual intersection.
The utility model is provided with a switch of being made by elastic metallic material between the bottom surface and circuit board of described release; This switch and reset button interlock, when reset button is pressed, switch closure, when reset button was released, switch disconnected;
On the earth leakage protective socket circuit board design have a leakage current detect control circuit, a life-span stop detection circuit and-startup/trip circuit resets;
Described switch series is associated in the current supply circuit of life-span stop detection circuit; The signal output part that leakage current detects control circuit links to each other with the leakage current signal input part of life-span stop detection circuit, and the control signal output ends of life-span stop detection circuit links to each other with the startup/trip circuit that resets, and controls the startup that resets/trip circuit action;
Push testing button earlier, it is working properly that described leakage current detects control circuit, its signal output part output high level; The life-span stop detection circuit working, its control signal output ends output high level is given the startup/trip circuit that resets, and makes its work, sends the sound of " rattling away ", pushes reset button again, makes it to reset, and power supply output is arranged; Otherwise life-span stop detection circuit control signal output output low level is given the startup/trip circuit that resets, and the startup/trip circuit that resets is not worked, and stops reset button to reset, non-transformer output.
Because the utility model adopts above technical scheme; make the utility model not only have creepage protection function; and; after power firestreak in the utility model and wall, zero line are connected; must push testing button earlier; detect earth leakage protective socket and whether still have creepage protection function, whether end-of-life.When earth leakage protective socket is intact, working properly, then can send the sound of " rattling away ", show that earth leakage protective socket passes through to detect, push reset button again, reset button can reset, and the single-phase three-wire power supply output plughole of the load output of earth leakage protective socket and receptacle face all has power supply output; After pushing testing button; do not send the sound of " rattling away "; show that promptly this earth leakage protective socket is not by detecting; this earth leakage protective socket has not had creepage protection function, end-of-life; the utility model just stops reset button to reset; 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, avoided when leaky occurring because of earth leakage protective socket end-of-life the generation of dead accident but its user who still has power supply output to cause gets an electric shock.In addition; in use; when certain the spare and accessory parts fault in the earth leakage protective socket,, can cut off the power supply output of socket mechanically by force by pushing testing button by force particularly when the tripping coil fault or controllable silicon opens circuit or the leakage current detecting element damages can't operate as normal the time.The utility model function is complete, fail safe good, and is safe and convenient to use, can guarantee user's personal safety and security appliance really.
Description of drawings
Fig. 1 is the three-dimensional decomposition texture schematic diagram of the utility model
Fig. 2 is a front view of the present utility model
Fig. 3 removes front view behind the loam cake for the utility model
Fig. 4 is that each module position concerns schematic diagram on the utility model circuit board
Fig. 5-1 is the C-C partial sectional view of Fig. 3, the socket starting state schematic diagram that resets
Fig. 5-2 is the C-C partial sectional view of Fig. 3, socket normal operating conditions schematic diagram
Fig. 5-3 is the C-C partial sectional view of Fig. 3, pushes testing button socket tripped condition schematic diagram
Fig. 5-4 is the C-C partial sectional view of Fig. 3, pushes testing button and makes socket trip status schematic diagram by force
Fig. 6 is the A-A partial sectional view of Fig. 3, pushes testing button socket tripped condition schematic diagram
Fig. 7 is the utility model control circuit physical circuit figure
Embodiment
As shown in Figure 1, the disclosed earth leakage protective socket of the utility model mainly by housing, be installed in the earth leakage protective socket realized in the housing and have/unregulated power output and by push testing button detect earth leakage protective socket whether the circuit board 18 of end-of-life constitute.
Described housing is combined by loam cake 2, insulation middle layer bracket 3 and base 4; Between loam cake 2 and middle layer bracket 3, be provided with metal ground connection mounting panel 1; Between middle layer bracket 3 and base 4, be provided with circuit board 18.
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.Be provided with reset button (RESET) 8 and testing button (TEST) 7 in reset button hole 8-A and testing button hole 7-A, reset button 8 and testing button 7 pass metal ground connection mounting panel 1 and 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 base 4 on groove 4-B fix.
Metal ground connection mounting panel 1 links to each other with the earth by earthing screw 13-A (as figure, 1 shown in Figure 2), lead.On metal ground connection mounting panel 1, be provided with ground connection blade 11,12 with the ground hole corresponding section of loam cake 2 power supply output plugholes 5,6.
As Fig. 1, shown in Figure 3, a power firestreak output conductor 14 and a zero-power line output conductor 13 are installed in the both sides of the middle layer bracket 3 that insulate.At the two ends of power supply output conductor 13,14, be provided with sheet clip leaf wing 60,61,62,63 with null line hole, the corresponding section, live wire hole of loam cake 2 power supply output plugholes 5,6.On power supply output conductor 13,14, be respectively equipped with fixed contact 15,52 and 16,53, form two pairs of fixed contacts 15,16 and 52,53.
Also be welded with a green indicating lamp G on middle layer bracket 3, this indicator light G is embedded in the loam cake 2 status indicator lamp hole 30-A.The two ends of indicator light G link to each other (as shown in Figure 7) with zero line with the live wire of earth leakage protective socket power output end (load output), are used to indicate the operating state of earth leakage protective socket.
As shown in Figure 1, base 4 is used to hold middle layer bracket 3 and circuit board 18.The bilateral symmetry of base 4 be provided with a pair of zero-power line, live wire input wires screw 9,10 and a pair of zero-power line, live wire output connection screw 109,110.
Core component of the present utility model is mounted in the circuit board 18 in the housing, and 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, detect whether end-of-life and send information and the machinery function of threading off by force of earth leakage protective socket.
As Fig. 1, shown in Figure 4, this circuit board 18 is provided with two elasticity zero-power lines, live wire input sheet metal 50,51.One end of elasticity power supply input sheet metal 50,51 is bent downwardly 90 degree, passing differential differentiating transformer 19 is welded on the circuit board 18, link to each other with zero-power line, live wire input wires screw 9,10 by input wires sheet 24,25, zero-power line input wires screw 9 links to each other with zero-power line in the wall by lead, and power firestreak input wires screw 10 links to each other with power firestreak in the wall by lead; The other end of elasticity power supply input sheet metal 50,51 is respectively equipped with moving contact 54 and 55. Moving contact 54,55 respectively be arranged on middle layer bracket 3 on power supply output conductor 13,14 on fixed contact 52,53 (as shown in Figure 3) corresponding.Above circuit board 18, both sides also are provided with two elastic sheet metals 20,21; One end of elastic sheet metal 20,21 is welded on the circuit board, and links to each other with the power supply output connection screw 109,110 that is arranged on base 4 both sides with zero-power line, 80,81 contacts of live wire output; The other end is provided with moving contact 22,23, this moving contact 22,23 respectively with power supply output conductor 13,14 on fixed contact 15,16 corresponding (as shown in Figure 3).Moving contact, fixed contact on above-mentioned power supply input sheet metal 50,51, power supply output conductor 13,14 and the elastic sheet metal 20,21 constitute zero line, two groups of four pairs of mains switches 54 of live wire and 52,22 and 15,55 and 53,23 and 16 altogether.
On circuit board 18, also be provided with the differential differentiating transformer 19 that is used to detect leakage current; as shown in Figure 7; power firestreak HOT, zero line WHITE pass differential differentiating transformer 19; when leaky occurring in the current supply circuit; differential differentiating transformer will detect control chip IC1 (model RV4145) to leakage current by output voltage signal; chip IC 1 output control signal makes the tripgear action on the circuit board 18, earth leakage protective socket tripping operation, the output of cutting off the electricity supply.
Shown in Fig. 1, Fig. 4, Fig. 5-1, on circuit board 18, also be provided with can make elasticity power supply input sheet metal 50,51 is connected with power supply output conductor 13,14 electric power/or disconnect and by power supply output conductor 13,14 make elastic sheet metal 20,21 charged/or cut off the power supply, and then make the power supply output plughole of power output end 80,81, receptacle face 5,6 charged/or the tripgear that cuts off the power supply.This tripgear comprises release 28, snap close 30, latch spring 34, dropout lever 37 and tripping coil 26.
Be provided with a vertical central perforation 29 at the top of release 28, the reset guide post 35 that is with back-moving spring 91 that is embedded in reset button 8 bottom surfaces can move up and down along central perforation 29.Have the locked groove 36 of a circle depression in the bottom of reset guide post 35, near its bottom.In the bottom of release 28, cross release 28 and be provided with " L " shape snap close 30 of movably making by metal material.End face at snap close 30 is provided with bonnet lock hole 31.Between the sidewall of release 28 and snap close 30 inboards, be provided with a circular recess 33, be built-in with latch spring 34.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 the sidewall of snap close 30.Be provided with a protective cover 41 above tripping coil 26, middle layer bracket one end is pushed down protective cover 41.
Be provided with a hole 32 in the end of snap close 30 end faces, in hole 32, be installed with one " 7 " font dropout lever 37, dropout lever 37 be positioned at testing button 7 below, be provided with a fulcrum 28-A at release 28 near on the sidewall of dropout lever 37, dropout lever 37 leans against on the fulcrum 28-A of release 28 sidewalls.
As Fig. 5-1, shown in Figure 7, the utility model is provided with a K switch 3 of being made by elastic metallic material between the bottom surface and circuit board 18 of release 28, two contacts 67,68 are arranged on it.This K switch 3 and reset button (RESET) 8 interlocks, when reset button RESET is pressed, K switch 3 closures, when reset button (RESET) 8 was released, K switch 3 disconnected.In the utility model specific embodiment, the signal input tube pin 7 of life-span stop detection control chip IC2 (model MH0310) by with the K switch 3 and DC power supply V of reset button RESET interlock
CCLink to each other.
Fig. 7 is the utility model control circuit physical circuit figure.As shown in the figure, two of differential differentiating transformer 19 magnetic test coils, leakage current detection control chip IC1 (model RV4145), resistance R 2, R3, capacitor C 2～C5 constitute leakage current detection circuit.When leakage current occurring in the current supply circuit, pass the power firestreak HOT of differential differentiating transformer 19, the current imbalance between the zero line WHITE, differential differentiating transformer 19 is exported a voltage signal immediately and is given control chip IC1, the 5 pin output high level of chip IC 1.
Testing button (TEST) 7 and resistance R 4 constitute simulation leakage current generating circuit, and the end of testing button TEST links to each other with power firestreak HOT, and the other end links to each other with zero-power line WHITE by resistance R 4.When testing button TEST was pressed, power firestreak and zero line short circuit produced leakage current.If earth leakage protective socket is intact, working properly, 5 pin of chip IC 1 should be exported high level.
Controllable silicon SCR, the tripping coil SOL that is built-in with iron core and capacitor C 7 constitute the startup/trip circuit that resets.The end of tripping coil SOL links to each other with the live wire HOT of socket power input LINE, and the other end links to each other with the anode of controllable silicon SCR, and the negative electrode of controllable silicon SCR links to each other with ground.When the control of controllable silicon SCR very during high level, the controllable silicon SCR conducting that is triggered, there is electric current to flow through in the tripping coil SOL, produce magnetic field, make the iron core action that is built in the tripping coil SOL, iron core promotes snap close 30 actions in the tripgear, thereby, reset button RESET is resetted or thread off tripping operation.When reset button RESET was reset, socket load output LOAD was that three plug-and- socket holes 5,6 of power output end 109,110 and receptacle face all have power supply output.When reset button RESET threaded off tripping operation, three plug-and- socket holes 5,6 of socket load output LOAD and receptacle face did not all have power supply output.
Life-span stop detection control chip IC2 (model MH0310), constituted the life-span stop detection circuit with K switch 3, triode Q1, resistance R 7, R16, R19, the C8-C12 of reset button RESET interlock.1 pin of life-span stop detection control chip IC2 links to each other by the dc power anode of resistance R 7 with diode rectifier bridge D1-D4 output, and produces a constant voltage dc source V by resistance R 7, D5, C8
CC, for chip IC 2, triode Q1 provide working power.2 pin of control chip IC2 link to each other with 5 pin of chip IC 1 by resistance R 12, are used to receive the control signal from chip IC 1 output.3 pin of control chip IC2 link to each other with ground with R16 by the C10 of parallel connection.4 pin of control chip IC2 link to each other with ground.5 pin of control chip IC2 link to each other with ground by capacitor C 11, the resistance R 19 of parallel connection.6 pin of control chip IC2 link to each other with 5 pin by capacitor C 12; The instantaneous high level signal of 6 pin output when being used to eliminate the earth leakage protective socket energising with 5 pin of control chip IC2, C11, C12 that 6 pin link to each other and R19, and can adjust the setting-up time of monostable circuit.The test signal input pin 7 of control chip IC2 by with the K switch 3 and DC power supply V of reset button RESET interlock
CCLink to each other.The control signal output pin 8 of control chip IC2 links to each other with the base stage of triode Q1, the collector electrode of triode Q1 and DC power supply V
CCLink to each other; The emitter of triode Q1 extremely links to each other with the control of controllable silicon SCR by resistance R 11, and the emitter of triode Q1 also links to each other with ground by resistance R 10, C9 simultaneously.
The life-span stop detection control chip IC2 (model MH0310) that the utility model is selected for use is an integrated circuit: it is made of inverter NOT1-NOT5, NAND gate NAND, two electronic analog swtich K1, K2, the control circuit U1 of control electronic analog swtich K1 cut-off/close, the control unit U2 of control electronic analog swtich K2 cut-off/close.Its inner annexation: 2 pin of control chip IC2 link to each other with 5 pin of IC1 by resistance R 12, be used to receive from the control signal of chip IC 1 output and then with two inverter NOT1, NOT2 and link to each other, link to each other with the control unit U2 of control electronic analog swtich K2 closure/disconnection by delay circuit, the resistance R of forming by R15, D7, C10, R16 8 again, with the cut-off/close of control electronic analog swtich K2; Link to each other with the control unit U1 of control electronic analog swtich K1 cut-off/close by resistance R of serial connection 17, two reverser NOT3, NOT4, diode D8, R21, NAND gate NAND, inverter NOT5, resistance R 20 again.
The resistance R 8 of control chip IC2 inside is used to eliminate noise signal; The unidirectional conducting of diode D6 control electronic analog swtich K1; Resistance R 9, triode Q1 and resistance R 10 are formed an emitter follower, to drive SCR; Resistance R 11 and C9 are used for filtering, to eliminate interference signal and noise; R15, D7, C10 and R16 constitute a delay circuit; The instantaneous high level signal of NOT5 output when C11, C12 and R19 are used to eliminate the earth leakage protective socket energising, and available its adjusted the setting-up time of monostable circuit.
The utility model control chip IC2 detect earth leakage protective socket whether the principle of end-of-life be:
(1), after live wire HOT, the zero line WHITE of the utility model earth leakage protective socket power input LINE and power firestreak, zero line in the wall connect; Open general supply; Control circuit input LINE just is applied with an alternating voltage, and direct voltage of output detects control chip IC1 to leakage current after this alternating current pressuring meridian rectification circuit D1～D4 rectification; Simultaneously, this direct voltage provides operating voltage V for 1 pin of life-span stop detection control chip IC2 through the voltage stabilizing circuit of R7, D5 and C8 composition
CCAt this moment, the pin one of life-span stop detection control chip IC2 is a high level, and pin two is a low level, and the simulant electronic switch K1 of control chip IC2 inside is in off-state, and K switch 2 is in closure state.Because the pin two of IC2 is a low level, so, the pin 8 of IC2 also is a low level, triode Q1 ends, not conducting of controllable silicon SCR, no current flows through in the coil SOL, does not produce magnetic field, its built-in iron core is failure to actuate, and is failure to actuate by the tripgear that release 28, snap close 30, latch spring 34 constitute.
(2), at this moment, if directly push reset button RETEST, because the pin 8 of control chip IC2 is a low level, triode Q1 ends, not conducting of controllable silicon SCR, and no current flows through in the coil SOL, do not produce magnetic field, its built-in iron core is failure to actuate, and is failure to actuate by the tripgear that release 28, snap close 30, latch spring 34 constitute, and reset button RETEST can not reset; The power supply output plughole 5,6 of earth leakage protective socket load output LOAD and receptacle face does not all have power supply output; socket stably is connected in the supply line; so; must push testing button TEST earlier; detect earth leakage protective socket and whether still have creepage protection function, detect its whether end-of-life.
(3), so, must push testing button TEST earlier, detect whether end-of-life of earth leakage protective socket.
Push testing button TEST and produce the simulation leakage current, make the power firestreak HOT that passes differential differentiating transformer 19, the current imbalance between the zero line WHITE; If earth leakage protective socket is intact, there is not end-of-life, differential differentiating transformer 19 is exported a voltage signal immediately and is given chip IC 1; The 5 pin output high level of chip IC 1; the pin two of chip IC 2 becomes high level from low level; the pin 8 of chip IC 2 also becomes high level from low level; triode Q1 conducting; the controllable silicon SCR conducting that is triggered; the tripping coil SOL and the capacitor C 7 that are built-in with iron core constitute the startup/trip circuit conducting that resets; coil SOL produces magnetic field; its built-in iron core action; iron core promotes snap close 30 actions, and the sound of " rattling away " is sent in earth leakage protective socket inside, shows that earth leakage protective socket is intact; do not have end-of-life, can use.
Otherwise; if earth leakage protective socket is end-of-life; can't detect leakage current; 5 pin of chip IC 1 are not just exported high level; the pin two of chip IC 2 still is a low level; the pin 8 of chip IC 2 also still is a low level; not conducting of triode Q1, controllable silicon SCR is in off state, and the tripping coil SOL and the capacitor C 7 that are built-in with iron core constitute the not conducting of startup/trip circuit that resets; coil SOL does not have electric current to flow through; do not produce magnetic field, its built-in iron core is failure to actuate, and the sound of " rattling away " is not sent in earth leakage protective socket inside; show earth leakage protective socket end-of-life, can not continue again to have used.
Because the pin two of chip IC 2 is a high level, this high level signal through the delay circuit of R15, D7 and C10, R16 composition, produces a control signal and gives control unit U2 again after the driving of NOT1 and NOT2, and K2 is disconnected; This signal through after NOT3 and the NOT4 driving, triggers the mono-stable timing circuit of being made up of NAND and NOT5 again, makes NOT5 output high level signal give control unit U1, makes the K1 closure.
(4), find that when pushing testing button TEST detection earth leakage protective socket it does not have end-of-life; after can normally using, along with the release of testing button TEST, the simulation leakage current disappears; 5 pin of chip IC 1 become low level, and 2 pin of chip IC 2 become low level K2 auto-closing again.
The user can press reset button RESET behind the sound of hearing " rattling away ", because K switch 3 and reset button RESET interlock, when pressing reset button RESET, K switch 3 closures; At this moment, K switch 1, K2, K3 are in closure state, the 8 pin output high level signal of chip IC 2, triode Q1 conducting, make the conducting that is triggered of controllable silicon SCR in the startup/trip circuit that resets, tripping coil SOL gets electricly has electric current to flow through, and produces magnetic field, and its built-in iron core action promotes the release 28 and snap close 30 actions of earth leakage protective socket; Shown in Fig. 5-2; the locked groove 36 that is embedded in the reset guide post 35 of reset button RESET bottom is stuck in the lockhole 31 of snap close 30; discharge reset button RESET; driving release 28 moves up; make and be positioned at the elastic sheet metal 50 that the arm top is carried in release 28 both sides; 51; 20; 21 move up thereupon together; make elasticity power supply input sheet metal 50; moving contact 54 on 51; 55 with power supply output conductor 13; fixed contact 52 on 14; 53 contacts; power supply output conductor 13; 14 is charged; the three-way power supply output plughole 5 on earth leakage protective socket surface; 6 have power supply output; and; elastic sheet metal 20; moving contact 22 on 21; 23 with power supply output conductor 13; fixed contact 15 on 14; 16 contacts; make and power output end 80; 81 contacted elastic sheet metals 20; 21 is charged; earth leakage protective socket power output end 80; 81 and the power supply output plughole 5 of receptacle face; 6 have power supply output, earth leakage protective socket operate as normal.And the mono-stable timing circuit that constitutes with 5 pin of chip IC 2, resistance R 19, capacitor C 11, C12 that 6 pin link to each other is regularly about 5 minutes, to keep the closure state of K1; After exceeding timing, mono-stable timing circuit recovers initial state automatically, the NOT5 output low level, and the K1 automatic disconnection, K2 continues closed.
As Fig. 5-3, Fig. 6, shown in Figure 7, below testing button TEST, be provided with a test film 40, test film 40 belows are provided with a conductive pin 72, and conductive pin 72 is embedded in the power spring 71, and power spring 71 links to each other with zero-power line WHITE by conductive lead wire 27-A, test resistance R4; Test film 40 links to each other with power firestreak HOT by conductive lead wire 27-B.
In use; the earth leakage protective socket function is intact; push testing button TEST; the simulation leaky; after differential differentiating transformer 19 detects leakage current; output voltage signal is given control chip IC1; the 5 pin output high level of chip IC 1 is given 2 pin of control chip IC2; the 8 pin output high level of IC2; the control utmost point of controllable silicon SCR must conduct; there is electric current to pass through in the tripping coil 26 (SOL); produce magnetic field; attract built-in iron core 42 bump snap closes 30 wherein; make it mobile; shown in Fig. 5-3; the locked groove 36 of reset guide post 35 bottoms skids off from the bonnet lock hole 31 of snap close 30; reset button 8 is threaded off; release 28 falls; be positioned at release 28 both sides and carry the elastic sheet metal 50 of arm top; 51; 20; 21 fall thereupon together; make elasticity power supply input sheet metal 50; moving contact 54 on 51; 55 with power supply output conductor 13; fixed contact 52 on 14; 53 disconnect; power supply output conductor 13; fixed contact 15 on 14; 16 with elastic sheet metal 20; moving contact 22 on 21; 23 disconnect; make power supply output conductor 13; 14 and elastic sheet metal 20; 21 is not all charged; thereby; make earth leakage protective socket power output end 80; 81 and the power supply output plughole 5 of receptacle face; 6 all do not have power supply output, cut off all power supply outputs of earth leakage protective socket.Behind the NOT1 and the driving of NOT2 of this signal in control chip IC2, the delay circuit time-delay of forming through R15, D7 and C10, R16 produces a control signal and makes the K2 disconnection again; This signal through after NOT3 and the NOT4 driving, triggers the mono-stable timing circuit of being made up of NAND and NOT5 again, and then NOT5 output high level signal, makes the K1 closure; Unclamp testing button TEST afterwards, the high level signal of the 5 pin output of chip IC 1 disappears, and this moment, the output of NOT2 became low level, the K2 auto-closing.
If current leakage jack life termination, do not had creepage protection function, may there be two kinds of situations in it: first kind of situation is: leakage current detects 5 pin of control chip IC1 can not export high level, 2 pin of life-span stop detection control chip IC2 are low level all the time, NOT2 in the control chip IC2 and the output of NOT5 are low level always at this moment, K1 is in off-state, K2 is in closure state, 8 pin of IC2 are always low level, controllable silicon SCR not conducting all the time in startup/trip circuit resets, all the time there is not electric current to flow through in the tripping coil SOL, do not produce magnetic field, earth leakage protective socket can not send the sound of " rattling away ", and the release 28 and the snap close 30 of earth leakage protective socket are failure to actuate all the time, and reset button RESET can not reset all the time; Second kind of situation is: 5 pin that leakage current detects control chip IC1 continue to have high level output, make the D7 negative pole become high level signal, K2 can be in off-state always, controllable silicon SCR not conducting all the time in the feasible startup/trip circuit that resets, all the time there is not electric current to flow through in the tripping coil SOL, do not produce magnetic field, reset button RESET can not reset; The earth leakage protective socket of reminding the user more to renew.
The utility model is exactly to detect control chip IC1 by life-span stop detection control chip IC2 on the circuit board and leakage current, in use, push testing button TEST by " elder generation " and detect earth leakage protective socket and whether have creepage protection function, whether end-of-life; If the earth leakage protective socket function is intact, the user can hear the sound of " rattling away ", and " again " presses reset button RESET, makes the load output LOAD of earth leakage protective socket and the power supply output plughole 5,6 of receptacle face that power supply output be arranged all the time; If end-of-life; life-span stop detection control chip IC2 does not just export control signal; make the controllable silicon SCR not conducting all the time in the startup/trip circuit that resets; all the time there is not electric current to flow through in the tripping coil SOL; do not produce magnetic field; the release 28 and the snap close 30 of earth leakage protective socket are failure to actuate all the time, stop reset button RESET to reset, make the load output LOAD of earth leakage protective socket and the power supply output plughole 5,6 of receptacle face not have power supply output all the time.In use, push testing button TEST and detect earth leakage protective socket, the user does not hear the sound of " rattling away ", and reset button can not reset the earth leakage protective socket of then reminding the user more to renew.
As Fig. 5-3; shown in Figure 7; in use; if leaky; after differential differentiating transformer 19 detects leakage current; output voltage signal is given control chip IC1; the 5 pin output high level of chip IC 1; the control utmost point of controllable silicon SCR must conduct; there is electric current to pass through in the tripping coil 26 (SOL); produce magnetic field; attract iron core 42 bump snap closes 30; make it mobile; shown in Fig. 5-3; the locked groove 36 of reset guide post 35 bottoms skids off from the central perforation 31 of snap close 30; reset button 8 is threaded off; release 28 falls; be positioned at release 28 both sides and carry the elastic sheet metal 50 of arm top; 51; 20; 21 fall thereupon together; make elasticity power supply input sheet metal 50; moving contact 54 on 51; 55 with power supply output conductor 13; fixed contact 52 on 14; 53 disconnect; power supply output conductor 13; fixed contact 15 on 14; 16 with elastic sheet metal 20; moving contact 22 on 21; 23 disconnect; make power supply output conductor 13; 14 and elastic sheet metal 20; 21 is not all charged; thereby, make earth leakage protective socket power output end 80; 81 and the power supply output plughole 5 of receptacle face; 6 all do not have power supply output, cut off all outputs of earth leakage protective socket.This level signal again through the delay circuit of R15, D7 and C10, R16 composition, produces a control signal K2 is disconnected after the driving of NOT1 and NOT2; This signal through after NOT3 and the NOT4 driving, triggers the mono-stable timing circuit of being made up of NAND and NOT5 again, and then NOT5 output high level signal, makes the K1 closure; Unclamp testing button TEST afterwards, the high level signal of the 5 pin output of chip IC 1 disappears, and this moment, the output of NOT2 became low level, the K2 auto-closing.
Shown in Fig. 5-4, the user can cut off the power supply output of earth leakage protective socket by force by pushing testing button 7 mechanically.The dropout process is as follows: push testing button 7, make its top withstand the end face of dropout lever 37, making dropout lever 37 is that fulcrum rotates with fulcrum 28-B, the sidewall of dropout lever 37 leaves the fulcrum 28-A of release 28 sidewalls, because the perforation 32 that dropout lever 37 passes snap close 30, thereby pulling snap close 30 moves, locked groove 36 on the reset guide post 35 is skidded off from bonnet lock hole 31, release 28 is to the whereabouts, elasticity power supply input sheet metal 50,51 fall, make its moving contact and power supply output conductor 13,14 fixed contact disconnects, and then make power output end 80,81 elastic sheet metals 20 that link to each other, 21 is not charged, power supply output conductor 13,14 and power output end 80,81 is not all charged, the output of socket non-transformer.
As shown in Figure 4, the utility model below elasticity power supply input sheet metal 50,51 moving contacts and elastic sheet metal 20,21 below, the bobbin of tripping coil 26 is provided with two pairs of position-limited blocks 43,44 and 73,74.
Indulge the above; the utility model not only has creepage protection function; and the power firestreak in the utility model and wall, zero line are connected, and press testing button TEST earlier; have or not and hear again whether can reset by reset button RESET; to detect whether end-of-life of earth leakage protective socket,, still has creepage protection function if the earth leakage protective socket function is normal; can hear the sound of " rattling away ", and reset button can be resetted normally.If current leakage jack life termination, life-span stop detection control chip stop reset button can not be reset all the time.In addition, in use, during certain spare and accessory parts fault in the earth leakage protective socket, particularly when the tripping coil fault can't operate as normal, can export by pushing the power supply that testing button cut off socket mechanically by force.The utility model function is complete, fail safe good, and is easy to use, can guarantee user's personal safety and security appliance.
Claims (7)
1, a kind of earth leakage protective socket with life-span stop detection and testing result prompt facility, it by housing, be installed in the earth leakage protective socket realized in the housing and have/circuit board (18) of unregulated power output constitutes; It is characterized in that:
Elasticity power firestreak input sheet metal (51), elasticity zero-power line input sheet metal (50) are installed on described circuit board, are used to detect the differential differentiating transformer (19) of leakage current and this elasticity power firestreak of control, zero line and import the tripgear (28,30,34,37,26) whether sheet metal (50,51) and socket power output conductor (13,14,80,81) contact;
Described socket power output conductor comprises the power firestreak output (81) that is with power firestreak output connection screw (110) that is welded on the circuit board, be welded on the zero-power line output (80) that is with zero-power line output connection screw (109) on the circuit board and be arranged on power firestreak output conductor (14), the zero-power line output conductor (13) of housing middle layer bracket both sides;
One end of power firestreak input sheet metal (51) passes described differential differentiating transformer (19) and is welded on the circuit board (18), links to each other with power firestreak in the wall by power firestreak input wires screw (10), and the other end is provided with a moving contact (55); One end of zero-power line input sheet metal (50) passes described differential differentiating transformer (19) and is welded on the circuit board (18), links to each other with zero-power line in the wall by zero-power line input wires screw (9), and the other end is provided with a moving contact (54);
Power firestreak output (81) is welded on the circuit board with elastic sheet metal (21) contact that is arranged on circuit board (18) top, and link to each other with power firestreak output connection screw (110), be provided with a moving contact (23) at the other end of elastic sheet metal (21); Zero-power line output (80) is welded on the circuit board with elastic sheet metal (20) contact that is arranged on circuit board (18) top, and link to each other with zero-power line output connection screw (109), be provided with a moving contact (22) at the other end of elastic sheet metal (20);
The power firestreak output conductor (14) that is arranged on housing middle layer bracket both sides is provided with two sheet clip leaf wings (62,63), and two sheet clip leaf wings (62,63) pass from the firewire jack of two supply hubs (5,6) of receptacle face respectively; Be arranged on the zero-power line output conductor (13) of housing middle layer bracket both sides and also be provided with two sheet clip leaf wings (60,61), two sheet clip leaf wings (60,61) pass from the zero line jack of two supply hubs (5,6) of receptacle face respectively;
On power firestreak output conductor (14), be provided with two fixed contacts (16 and 53); On zero-power line output conductor (13), be provided with two fixed contacts (15 and 52);
Moving contact (55) on the power firestreak input sheet metal (51) contact with the fixed contact (53) on the power firestreak output conductor (14)/or a pair of mains switch of disconnection formation; Moving contact (23) on the elastic sheet metal (21) contacts with fixed contact (16) on the power firestreak output conductor (14)/or disconnect and constitute a pair of mains switch; Moving contact (54) on the zero-power line input sheet metal (50) contact with the fixed contact (52) on the zero-power line output conductor (13)/or a pair of mains switch of disconnection formation; Moving contact (22) on the elastic sheet metal (20) contacts with fixed contact (15) on the zero-power line output conductor (13)/or disconnect and constitute a pair of mains switch; Come to four pairs of contacts (55 and 53,23 and 16,54 and 52,22 and 15) and constitute live wire, two groups of four pairs of switches of zero line;
Power firestreak input sheet metal (51) and elastic sheet metal (21) are positioned at a side of tripgear (28,30,34,37,26); Zero-power line input sheet metal (50) and elastic sheet metal (20) are positioned at the opposite side of tripgear (28,30,34,37,26); And can be with tripgear (28,30,34,37) upper and lower displacement.
2, a kind of earth leakage protective socket with life-span stop detection and testing result prompt facility according to claim 1 is characterized in that: the position that moving contact (55) on the described power firestreak input sheet metal (51) and the moving contact (23) on the elastic sheet metal (21) are carried the arm top in tripping operation dress (28,30,34,37,26) side is cross one another;
Moving contact (54) on the described zero-power line input sheet metal (50) and the moving contact (22) on the elastic sheet metal (20) are carried the arm top in tripgear (28,30,34,37,26) side position also is mutual intersection.
3, a kind of earth leakage protective socket according to claim 1 and 2 with life-span stop detection and testing result prompt facility, its feature also is: described tripgear includes a release (28), between the bottom surface and circuit board (18) of described release (28), be provided with a switch (K3) of making by elastic metallic material; The interlock of this switch (K3) and reset button (8), when reset button (8) when being pressed, switch (K3) closure, when reset button (8) when being released, switch (K3) disconnects;
Design has a leakage current to detect control circuit, a life-span stop detection circuit and a startup/trip circuit that resets on the earth leakage protective socket circuit board;
Described switch (K3) is connected in the current supply circuit of life-span stop detection circuit; The signal output part that leakage current detects control circuit links to each other with the leakage current signal input part of life-span stop detection circuit, and the control signal output ends of life-span stop detection circuit links to each other with the startup/trip circuit that resets, and controls the startup that resets/trip circuit action;
Push testing button (TEST) earlier, it is working properly that described leakage current detects control circuit, its signal output part output high level; The life-span stop detection circuit working, its control signal output ends output high level is given the startup/trip circuit that resets, and makes its work, sends the sound of " rattling away ", pushes reset button (RESET) again, makes it to reset, and power supply output is arranged; Otherwise life-span stop detection circuit control signal output output low level is given the startup/trip circuit that resets, and the startup/trip circuit that resets is not worked, and stops reset button to reset, non-transformer output.
4, a kind of earth leakage protective socket according to claim 3 with life-span stop detection and testing result prompt facility, its feature also is: described life-span stop detection circuit is made of life-span stop detection control chip (IC2), the switch (K3) with reset button (RESET) interlock, triode (Q1), resistance (R7-R20), electric capacity (C8-C12);
1 pin of life-span stop detection control chip (IC2) links to each other by the dc power anode of resistance (R7) with diode rectifier bridge (D1-D4) output, and produces a constant voltage dc source (V by a voltage stabilizing circuit
CC), for chip (IC2), triode (Q1) provide working power;
2 pin of control chip (IC2) link to each other with 5 pin of chip (IC1) by resistance (R12), are used for receiving the control signal from chip (IC1) output;
3 pin of control chip (IC2) link to each other with ground with resistance (R16) by electric capacity (C10) in parallel;
4 pin of control chip (IC2) link to each other with ground;
5 pin of control chip (IC2) link to each other with ground by electric capacity (C11), resistance (R19) in parallel;
6 pin of control chip (IC2) link to each other with 5 pin by electric capacity (C12), the instantaneous high level signal of 6 pin output when being used to eliminate the earth leakage protective socket energising, and the setting-up time of available adjustment monostable circuit with 5 pin of control chip (IC2), electric capacity (C11, C12) that 6 pin link to each other and resistance (R19);
The signal input tube pin 7 of control chip (IC2) by with the switch (K3) and DC power supply (V of reset button (RESET) interlock
CC) link to each other;
The control signal output pin 8 of control chip (IC2) links to each other with the base stage of triode (Q1), the collector electrode of triode (Q1) and DC power supply (V
CC) link to each other; The emitter of triode (Q1) extremely links to each other with the control of controllable silicon (SCR) by resistance (R11), and the emitter of triode (Q1) also links to each other with ground by resistance (R10), electric capacity (C9) simultaneously;
Described life-span stop detection control chip (IC2) is an integrated circuit: it is made of the control circuit (U1) of inverter (NOT1-NOT5), NAND gate (NAND), two electronic analog swtichs (K1, K2), control electronic analog swtich (K1) cut-off/close, the control unit (U2) of control electronic analog swtich (K2) cut-off/close;
Its inner annexation: 2 pin of control chip (IC2) link to each other with 5 pin that leakage current detects control chip (IC1) by resistance (R12), be used for receiving from the control signal of chip (IC1) output and then with two inverters (NOT1, NOT2) and link to each other, link to each other with the control unit (U2) of control electronic analog swtich (K2) closure/disconnection by a delay circuit, resistance (R8) again, with the cut-off/close of control electronic analog swtich (K2); Link to each other with the control unit (U1) of control electronic analog swtich (K1) cut-off/close by a serial connection resistance (R17), two reversers (NOT3, NOT4), diode (D8), resistance (R21), NAND gate (NAND), inverter (NOT5), resistance (R20) again.
5, a kind of earth leakage protective socket according to claim 3 with life-span stop detection and testing result prompt facility, it is characterized in that: described tripgear comprises release (28), snap close (30), latch spring (34), dropout lever (37) and tripping coil (26);
Described release (28) is a cylinder, is positioned at the below of reset button (8), and its top is provided with a vertical central perforation (29); Its left and right sides stretches out to form and carries arm; Described elasticity power supply input sheet metal (50,51) and elastic sheet metal (20,21) are positioned at the top that arm is carried in this release (28) both sides;
In the bottom of release (28), cross release and be provided with " L " shape snap close (30) of movably making by metal material, also be provided with a bonnet lock hole (31) at the end face of snap close (30);
Between the sidewall of release (28) and snap close (30) sidewall, be provided with a circular recess, be built-in with a latch spring (34); Be provided with a tripping coil (26) that is built-in with movable core (42) in the outside of snap close (30) sidewall; The built-in movable core (42) of tripping coil (26) faces the sidewall of snap close (30);
Be provided with a hole (32) in snap close (30) top end, be installed with one " 7 " font dropout lever (37) in hole (32), the end face of this dropout lever (37) is positioned at earth leakage protective socket testing button below;
Described release (28), snap close (30), latch spring (34) and (37) four on dropout lever are connected one of composition mutually can free movable integral body.
6, a kind of earth leakage protective socket according to claim 5 with life-span stop detection and testing result prompt facility, it is characterized in that: be provided with a test film (40) in earth leakage protective socket testing button (TEST) below, test film (40) below is provided with a conductive pin (72), conductive pin (72) is embedded in the power spring (71), and power spring (71) links to each other with zero-power line (WHITE) by conductive lead wire (27-A), test resistance (R4); Test film (40) links to each other with power firestreak (HOT) by conductive lead wire (27-B).
7, a kind of earth leakage protective socket with life-span stop detection and testing result prompt facility according to claim 6 is characterized in that: the below at described elasticity power supply input sheet metal (50,51) moving contact is provided with position-limited block (73,74); Be provided with position-limited block (43,44) in the below of described elastic sheet metal (20,21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620007903 CN200953413Y (en) | 2006-03-13 | 2006-03-13 | Electrical leakage protection socket with service life stopping detection and detection result prompting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620007903 CN200953413Y (en) | 2006-03-13 | 2006-03-13 | Electrical leakage protection socket with service life stopping detection and detection result prompting function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200953413Y true CN200953413Y (en) | 2007-09-26 |
Family
ID=38811715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620007903 Expired - Fee Related CN200953413Y (en) | 2006-03-13 | 2006-03-13 | Electrical leakage protection socket with service life stopping detection and detection result prompting function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200953413Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110112043A (en) * | 2019-05-30 | 2019-08-09 | 南方电网调峰调频发电有限公司鲁布革水力发电厂 | A kind of secure leakage protection switch |
| CN111273161A (en) * | 2020-03-13 | 2020-06-12 | 张树征 | Power failure detection device |
| CN114142304A (en) * | 2021-11-25 | 2022-03-04 | 佛山市艾家电气有限公司 | Household intelligent switch socket |
-
2006
- 2006-03-13 CN CN 200620007903 patent/CN200953413Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110112043A (en) * | 2019-05-30 | 2019-08-09 | 南方电网调峰调频发电有限公司鲁布革水力发电厂 | A kind of secure leakage protection switch |
| CN110112043B (en) * | 2019-05-30 | 2024-03-15 | 南方电网调峰调频发电有限公司鲁布革水力发电厂 | Safety leakage protection switch |
| CN111273161A (en) * | 2020-03-13 | 2020-06-12 | 张树征 | Power failure detection device |
| CN111273161B (en) * | 2020-03-13 | 2022-03-22 | 上海禾楷电气科技有限公司 | Power failure detection device |
| CN114142304A (en) * | 2021-11-25 | 2022-03-04 | 佛山市艾家电气有限公司 | Household intelligent switch socket |
| CN114142304B (en) * | 2021-11-25 | 2023-12-01 | 佛山市艾家电气有限公司 | Household intelligent switch socket |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070926 |