CN104425998A - Power socket and electric shock prevention circuit thereof - Google Patents
Power socket and electric shock prevention circuit thereof Download PDFInfo
- Publication number
- CN104425998A CN104425998A CN201310379122.1A CN201310379122A CN104425998A CN 104425998 A CN104425998 A CN 104425998A CN 201310379122 A CN201310379122 A CN 201310379122A CN 104425998 A CN104425998 A CN 104425998A
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- China
- Prior art keywords
- supply socket
- electric shock
- output
- protection against
- resistance
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
- H01R13/6675—Structural association with built-in electrical component with built-in electronic circuit with built-in power supply
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/70—Structural association with built-in electrical component with built-in switch
- H01R13/703—Structural association with built-in electrical component with built-in switch operated by engagement or disengagement of coupling parts, e.g. dual-continuity coupling part
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
The invention is suitable for a power socket, and provides a power socket and an electric shock prevention circuit thereof. The power socket electric shock prevention circuit comprises a first divider resistor, a photoresistor disposed between jacks of the power socket, a comparison module, a switching tube, and a relay. The inverted input end of the comparison module is connected with the anode of a power supply through the first divider resistor, and is connected with the cathode of the power supply through the photoresistor. The control end of the switching tube is connected with the output end of the comparison module, and the input end is connected with the anode of the power supply. The relay comprises a coil, a moving contact, and a normally open contact which is used to attract the moving contact. The coil is connected between the output end and the ground end of the switching tube. The moving contact and the normally open contact are connected between the firing line power line and the firing line plugging spring of the power socket. The power socket has a high sensitive energization function, and a problem that a conductor is inserted into an electrified socket aperture to cause an electric shock accident is prevented.
Description
Technical field
The invention belongs to supply socket field, particularly relate to a kind of supply socket and protection against electric shock circuit thereof.
Background technology
At present, power consumption equipment is can't do without in places such as house, retail shop, offices, therefore many electrical sockets are had at installment inside and outside rooms such as house, retail shop, offices, but, in the jack of ordinary circumstance electrical socket, reed is energized always, and especially child discloses into there being the socket aperture of electricity with conductor and causes electric shock accidents.The current protection against electric shock that has establishes the socket internal circuit of function generally to use triode device as trigger device, and sensitivity is not high, also may occur that plug does not have complete socket, the phenomenon that plug is just energized.
Summary of the invention
The supply socket protection against electric shock circuit that the object of the present invention is to provide a kind of fail safe high, be intended to the fail safe improving existing power supply socket, avoiding due to the reed in pin jack and get an electric shock, especially can preventing child from disclosing the problem causing electric shock accidents into there being the socket aperture of electricity with conductor.
The present invention is achieved in that a kind of supply socket protection against electric shock circuit, comprising:
First divider resistance;
Photo resistance, between the jack being arranged at supply socket and the plug that its photo resistance photosurface can be inserted into described supply socket block;
Comparison module, normal phase input end access reference voltage source, inverting input are connected with the positive pole of DC power supply through described first divider resistance, and are connected through the negative pole of described photo resistance with described DC power supply;
Switching tube, control end is connected with the output of described comparison module, input is connected with the positive pole of described DC power supply;
Relay, comprise coil, moving contact and for the normally opened contact with described moving contact adhesive, described coil is connected between the output of described switching tube and ground end, and described moving contact and described normally opened contact are connected between the fire-wire power line of described supply socket and live wire grafting shell fragment.
Photo resistance is arranged between the jack of supply socket by above-mentioned supply socket protection against electric shock circuit, after plug is seated, photo resistance is blocked, its resistance changes allows the conducting of comparison module control switch pipe allow relay closes, now supply socket is just energized, avoiding supply socket just energising when not inserting plug, can preventing child from disclosing the problem causing electric shock accidents into there being the socket aperture of electricity with conductor; In addition, photo resistance is utilized to be conducive to improving as energising trigger device the sensitivity that protection against electric shock and supply socket power on.
In addition, additionally providing a kind of supply socket, comprising the grafting shell fragment for being electrically connected with the pin elasticity of plug and above-mentioned supply socket protection against electric shock circuit.
Above-mentioned supply socket is the supply socket protection against electric shock circuit of energising trigger device with photo resistance by setting, has highly sensitive powering-on function, and can prevent conductor from disclosing the problem causing electric shock accidents into there being the socket aperture of electricity.
Accompanying drawing explanation
Fig. 1 is the module map of the supply socket protection against electric shock circuit that one embodiment of the invention provides;
Fig. 2 is the panel schematic diagram of the supply socket that one embodiment of the invention provides;
Fig. 3 is the schematic diagram of the supply socket protection against electric shock circuit that one embodiment of the invention provides.
Embodiment
In order to make the technical problem to be solved in the present invention, technical scheme and beneficial effect clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Usually, supply socket is provided with the grafting shell fragment for being electrically connected with the pin elasticity of plug, as illustrated in fig. 1 and 2, grafting shell fragment it comprise live wire grafting shell fragment L0 and zero line grafting shell fragment N0, wherein, on the fire-wire power line L that live wire grafting shell fragment L0 and zero line grafting shell fragment N0 can be connected respectively to AC power AC and zero line power line N, supply socket like this is able to normal use.
As shown in Figure 1, 2, show the supply socket protection against electric shock circuit of an embodiment, this supply socket protection against electric shock circuit comprises: the first divider resistance R1, photo resistance R0, comparison module 110, switching tube 120 and relay 130.
Between the jack 202 that photo resistance R0 is arranged at supply socket and the plug (not shown) that its photo resistance photosurface can be inserted into supply socket block, see Fig. 2; The normal phase input end access reference voltage source of comparison module 110, the inverting input of comparison module 110 is connected with the positive pole of DC power supply through the first divider resistance R1, and is connected with the negative pole of DC power supply through photo resistance R0; The control end of switching tube 120 is connected with the output of comparison module 110, and the input of switching tube 120 is connected with the positive pole of DC power supply; Relay 130 comprises coil K1, moving contact a and for the normally opened contact b with moving contact a adhesive, coil K1 is connected between the output of switching tube 120 and ground end, and moving contact a and normally opened contact b is connected between the fire-wire power line L of supply socket and live wire grafting shell fragment L0.
Photo resistance R0 test plug is utilized whether to insert, after comparison module 110 judges photo resistance R0 signal, control relay 130 closes, thus socket energising, photosensitive R0 resistance is installed in the middle of the pin of socket, can be covered by photo resistance R0 photosurface completely after plug inserts.Socket panel has indicator light, and this accurate anti-electric shock socket control circuit has lag function, there will not be the phenomenon that plug insertion rear socket power supply cuts in and out.
With reference to figure 3, in one embodiment, comparison module 110 comprises operational amplifier U1 and follows resistance R5, the normal phase input end of operational amplifier U1, inverting input, output successively as normal phase input end, inverting input, the output of comparison module 110, follow that resistance R5 is connected to operational amplifier U1 between normal phase input end and output.Following resistance R5 makes the comparison module 110 formed with operational amplifier U1 have hysteresis, and output jitter when comparison module 110 can not occur in a certain illuminance, causes the phenomenon that socket power cuts in and out.
Further, supply socket protection against electric shock circuit also comprises the first current-limiting resistance R6 and the second current-limiting resistance R7, first current-limiting resistance R6 is connected between the output (i.e. the output of operational amplifier U1) of comparison module 110 and the control end of switching tube 120, between the control end that the second current-limiting resistance R7 is connected to switching tube 120 and input.
In a preferred embodiment, first divider resistance R1 is adjustable resistance, by the magnitude of voltage of the resistance and reference voltage source that regulate this adjustable resistance, then can regulate effective control signal of the output of comparison module 110, so, switching tube 120 is the switching devices can selecting low level conducting, also can be the switching device of the effective conducting of high level.
Such as, when switching tube 120 is Low level effective conductings, with reference to figure 3, switching tube 120 is that the base stage of PNP type triode Q1, PNP triode Q1, emitter, collector electrode are successively as control end, input, the output of switching tube 120.And when switching tube 120 is the effective conductings of high level, switching tube 120 is NPN type triode, so the base stage of NPN triode, collector electrode, emitter are successively as control end, input, the output of switching tube 120.
Composition graphs 2 and Fig. 3, in one embodiment, supply socket protection against electric shock circuit also comprises indicating module 140, and indicating module 140 is energized for the live wire grafting shell fragment L0 presenting supply socket, and indicating module 140 is in parallel with the coil K1 of relay 130.The indicating module 140 synchronous light-emitting instruction when socket has electricity.And, under dark surrounds, photo resistance R0 can trigger comparison module 110 and export control signal and make switching tube 120 conducting, and after relay 130 is closed, supply socket also then has energising, and the indicating module 140 on electric socket panel also can have electricity by reminding user socket.
In a preferred embodiment, indicating module 140 comprises light-emitting diode D1 and the second divider resistance R2, the anode of light-emitting diode D1 is connected with the output of switching tube 120120, the negative electrode of light-emitting diode D1 is through the second divider resistance R2 ground connection, and light-emitting diode D1 is arranged at the panel surface 204 of supply socket.
Further, in one embodiment, supply socket protection against electric shock circuit also comprises the consumption diode D2 in parallel with the coil K1 of relay 130, consumes diode D2 plus earth, consumes diode D2 negative electrode and is connected with the output of switching tube 120.Consume the electricity of diode D2 after discharging plug to extract supply socket on coil K1, the electricity on coil K1 is transported to indicating module 140 by consumption diode D2 and can then the electric quantity consumption on coil K1 can be fallen.
Composition graphs 1,3, in one embodiment, supply socket protection against electric shock circuit also comprises the division module 150 for providing said reference voltage source, division module 150 comprises the 3rd divider resistance R3 and the 4th divider resistance R4, the normal phase input end of comparison module 110 is connected with the positive pole of DC power supply through the 3rd divider resistance R3, and the normal phase input end of comparison module 110 is also connected with the negative pole of DC power supply through the 4th divider resistance R4.
Composition graphs 1,3, in one embodiment, supply socket protection against electric shock circuit also comprises the transformation current stabilization module 160 for providing above-mentioned DC power supply, and transformation current stabilization module 160 comprises transformer T1, rectification filtering unit 161 and pressurizer U2.
Two input dividing potential drops of transformer T1 are connected with two outputs of AC power AC, two outputs of transformer T1 are connected with two inputs of rectification filtering unit 161 respectively, the cathode output end of rectification filtering unit 161 is connected with the positive input terminal IN of pressurizer U2, the cathode output end of rectification filtering unit 161 is connected with the earth terminal GND of pressurizer U2 and as the positive pole of above-mentioned DC power supply, and the output OUT of pressurizer U2 is as the negative pole of DC power supply.
Rectification filtering unit 161 comprises rectifier bridge BR1, the first filter capacitor C1 and the second filter capacitor C2, two inputs of rectifier bridge BR1 are as two inputs of rectification filtering unit 161, the common cathode output of rectifier bridge BR1 and altogether anode output end respectively as the cathode output end of rectification filtering unit 161 and cathode output end, the first filter capacitor C1 and the second filter capacitor C2 be connected to rectifier bridge BR1 common cathode output and altogether between anode output end.
In other embodiments of the present invention, above-mentioned DC power supply can utilize switching power circuit to provide.
The operation principle of supply socket protection against electric shock circuit: with reference to figure 3, when photo resistance R0 ambient light illumination drops to set point because its resistance rises, the reverse input end current potential of operational amplifier U1 is made to increase, after the resistance rising of photo resistance R0 makes its partial pressure potential be greater than 6V, operational amplifier U1 output overturns, triode Q1 conducting, the normally opened contact b adhesive of relay 130, supply socket is energized.The illuminance needed during by regulating the resistance size of the first divider resistance R1 to adjust supply socket energising is strong and weak.Comparison module 110 circuit that resistance R5 makes to form with operational amplifier U1 of following of operational amplifier U1 has hysteresis, and output jitter when comparison module 110 can not occur in a certain illuminance, causes the phenomenon that the power supply of supply socket cuts in and out.
In addition, additionally provide a kind of supply socket, it comprises grafting shell fragment L0 and N0 for being electrically connected with the pin elasticity of plug and above-mentioned supply socket protection against electric shock circuit.
Above-mentioned supply socket is the supply socket protection against electric shock circuit of energising trigger device with photo resistance by setting, there is highly sensitive powering-on function, can prevent conductor from disclosing the problem causing electric shock accidents into there being the socket aperture of electricity, and output jitter when can not occur in a certain illuminance, causes the phenomenon that the power supply of supply socket cuts in and out.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a supply socket protection against electric shock circuit, is characterized in that, comprising:
First divider resistance;
Photo resistance, between the jack being arranged at supply socket and the plug that its photo resistance photosurface can be inserted into described supply socket block;
Comparison module, normal phase input end access reference voltage source, inverting input are connected with the positive pole of DC power supply through described first divider resistance, and are connected through the negative pole of described photo resistance with described DC power supply;
Switching tube, control end is connected with the output of described comparison module, input is connected with the positive pole of described DC power supply;
Relay, comprise coil, moving contact and for the normally opened contact with described moving contact adhesive, described coil is connected between the output of described switching tube and ground end, and described moving contact and described normally opened contact are connected between the fire-wire power line of described supply socket and live wire grafting shell fragment.
2. supply socket protection against electric shock circuit as claimed in claim 1, is characterized in that, also comprises the indicating module of the live wire grafting shell fragment energising instruction for presenting described supply socket, the coils from parallel connection of coils of described indicating module and described relay.
3. supply socket protection against electric shock circuit as claimed in claim 2, it is characterized in that, described indicating module comprises light-emitting diode and the second divider resistance, the anode of described light-emitting diode is connected with the output of described switching tube, negative electrode through described second divider resistance ground connection, and described light-emitting diode is arranged at the panel surface of described supply socket.
4. supply socket protection against electric shock circuit as claimed in claim 1, it is characterized in that, also comprise the consumption diode with the coils from parallel connection of coils of described relay, described consumption diode anode ground connection, negative electrode are connected with the output of described switching tube.
5. the supply socket protection against electric shock circuit as described in claim 1,3 or 4, is characterized in that, described switching tube is PNP type triode, and the base stage of described triode, emitter, collector electrode are successively as control end, input, the output of described switching tube.
6. supply socket protection against electric shock circuit as claimed in claim 1, it is characterized in that, described comparison module comprises operational amplifier and follows resistance, the normal phase input end of described operational amplifier, inverting input, output successively as normal phase input end, inverting input, the output of described comparison module, described in follow that resistance is connected to described operational amplifier between normal phase input end and output.
7. the supply socket protection against electric shock circuit as described in claim 1 or 6, it is characterized in that, also comprise the first current-limiting resistance and the second current-limiting resistance, described first current-limiting resistance is connected between the output of described comparison module and the control end of described switching tube, between the control end that described second current-limiting resistance is connected to described switching tube and input.
8. supply socket protection against electric shock circuit as claimed in claim 1, it is characterized in that, also comprise the division module for providing described reference voltage source, described division module comprises the 3rd divider resistance and the 4th divider resistance, the normal phase input end of described comparison module is connected with the positive pole of described DC power supply through described 3rd divider resistance, and is connected with the negative pole of described DC power supply through described 4th divider resistance.
9. the supply socket protection against electric shock circuit as described in claim 1 or 8, is characterized in that, also comprise the transformation current stabilization module for providing described DC power supply, described transformation current stabilization module comprises transformer, rectification filtering unit and pressurizer, wherein,
Two input dividing potential drops of described transformer are connected with two outputs of AC power, two outputs of described transformer are connected with two inputs of described rectification filtering unit respectively, the cathode output end of described rectification filtering unit is connected with the positive input terminal of described pressurizer, the cathode output end of described rectification filtering unit is connected with the earth terminal of described pressurizer and as the positive pole of described DC power supply, and the output of described pressurizer is as the negative pole of described DC power supply.
10. a supply socket, comprising the grafting shell fragment for being electrically connected with the pin elasticity of plug, it is characterized in that, also comprises the supply socket protection against electric shock circuit as described in any one of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310379122.1A CN104425998A (en) | 2013-08-27 | 2013-08-27 | Power socket and electric shock prevention circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310379122.1A CN104425998A (en) | 2013-08-27 | 2013-08-27 | Power socket and electric shock prevention circuit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104425998A true CN104425998A (en) | 2015-03-18 |
Family
ID=52974301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310379122.1A Pending CN104425998A (en) | 2013-08-27 | 2013-08-27 | Power socket and electric shock prevention circuit thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104425998A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104426001A (en) * | 2013-08-30 | 2015-03-18 | 深圳市海洋王照明工程有限公司 | Socket and electric-shock resistant circuit thereof |
| CN107104318A (en) * | 2016-02-23 | 2017-08-29 | 粟有忠 | Three poles interlock light-operated plate connector |
| CN108683035A (en) * | 2018-06-12 | 2018-10-19 | 华北理工大学 | Electric vehicle accumulator accessory power outlet short-circuit protection |
| CN109507933A (en) * | 2018-12-19 | 2019-03-22 | 张绍轩 | The intelligent socket and its control method of equipment access identification and overcurrent protection |
| CN112993684A (en) * | 2019-12-12 | 2021-06-18 | 北京京人电器有限公司 | Socket |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2686152Y (en) * | 2003-11-04 | 2005-03-16 | 木塔力甫·买买提 | Light sensitive socket board |
| CN201075505Y (en) * | 2007-03-05 | 2008-06-18 | 周殿凤 | Safety electric outlet |
| CN201674412U (en) * | 2010-05-10 | 2010-12-15 | 维尔斯电子(昆山)有限公司 | Optical control type power supply device |
| CN202259848U (en) * | 2011-11-02 | 2012-05-30 | 秦红 | Anti-electric-shock safety socket |
| CN202444132U (en) * | 2012-02-29 | 2012-09-19 | 商丘市电业局永城分局 | Safety anti-electric shock socket |
| CN202602006U (en) * | 2012-05-09 | 2012-12-12 | 刘睿扬 | Electric shock-proof safety socket |
| US8462472B1 (en) * | 2011-05-26 | 2013-06-11 | Simon Avitan | Electric safety circuit for use with an electric receptacle |
-
2013
- 2013-08-27 CN CN201310379122.1A patent/CN104425998A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2686152Y (en) * | 2003-11-04 | 2005-03-16 | 木塔力甫·买买提 | Light sensitive socket board |
| CN201075505Y (en) * | 2007-03-05 | 2008-06-18 | 周殿凤 | Safety electric outlet |
| CN201674412U (en) * | 2010-05-10 | 2010-12-15 | 维尔斯电子(昆山)有限公司 | Optical control type power supply device |
| US8462472B1 (en) * | 2011-05-26 | 2013-06-11 | Simon Avitan | Electric safety circuit for use with an electric receptacle |
| CN202259848U (en) * | 2011-11-02 | 2012-05-30 | 秦红 | Anti-electric-shock safety socket |
| CN202444132U (en) * | 2012-02-29 | 2012-09-19 | 商丘市电业局永城分局 | Safety anti-electric shock socket |
| CN202602006U (en) * | 2012-05-09 | 2012-12-12 | 刘睿扬 | Electric shock-proof safety socket |
Non-Patent Citations (1)
| Title |
|---|
| 刘润华 等: "《模拟电子技术基础》", 31 March 2012, 中国石油大学出版社 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104426001A (en) * | 2013-08-30 | 2015-03-18 | 深圳市海洋王照明工程有限公司 | Socket and electric-shock resistant circuit thereof |
| CN104426001B (en) * | 2013-08-30 | 2018-05-18 | 深圳市海洋王照明工程有限公司 | Socket and its protection against electric shock circuit |
| CN107104318A (en) * | 2016-02-23 | 2017-08-29 | 粟有忠 | Three poles interlock light-operated plate connector |
| CN108683035A (en) * | 2018-06-12 | 2018-10-19 | 华北理工大学 | Electric vehicle accumulator accessory power outlet short-circuit protection |
| CN109507933A (en) * | 2018-12-19 | 2019-03-22 | 张绍轩 | The intelligent socket and its control method of equipment access identification and overcurrent protection |
| CN112993684A (en) * | 2019-12-12 | 2021-06-18 | 北京京人电器有限公司 | Socket |
| CN112993684B (en) * | 2019-12-12 | 2023-02-03 | 北京京人电器有限公司 | Socket |
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| PB01 | Publication | ||
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Application publication date: 20150318 |