CN102222877B - Electric wiring protection apparatus - Google Patents
Electric wiring protection apparatus Download PDFInfo
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- CN102222877B CN102222877B CN201010146078.6A CN201010146078A CN102222877B CN 102222877 B CN102222877 B CN 102222877B CN 201010146078 A CN201010146078 A CN 201010146078A CN 102222877 B CN102222877 B CN 102222877B
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Abstract
The invention relates to an electric wiring protection apparatus possessing an overheat protection function. The protection apparatus comprises a phase line access (10) including a first switch (13), a zero line access (20) including a second switch (23), an error detection circuit (40), a temperature control switch (70), a signal driving circuit (50) and a release assembly (90), wherein the error detection circuit comprises a secondary windings (45) and a current transformer (49), the error detection circuit is configured to respond to the errors of the phase line access and the zero line access and generate a first error detection signal in the secondary windings, the temperature control switch shuts and a second error detection signal is generated when the temperature exceeds a predetermined threshold, the signal driving circuit is connected to the secondary windings and the temperature control switch and is configured to respond to the first error detection signal and the second error detection signal and generate a driving signal, the release assembly is connected to the signal driving circuit and is configured to respond to the driving signal and cut off the first switch and the second switch. According to the electric wiring protection apparatus provided in the invention, a better guarantee can be provided to electrical safety.
Description
Technical field
The present invention relates to Electrical Safety protection field, particularly relate to the electric Wiring protection device of the breaking characteristics had between input and output.
Background technology
For avoiding the leakage current of household electrical appliance to damage user, usually at household electrical appliance, such as electric heater, refrigerator etc., mains input side install and there is the electric Wiring protection device of residual current protection function, such as leakage protecting plug.
In daily life; we find; existing ordinary plug and leakage protecting plug are during normal use; often because the problems such as socket quality cause latch and the loose contact of socket sheet of plug; then cause latch temperature too high and damage plug; severe patient even causes fire, brings huge hidden danger to the life of people and property safety.Therefore, on market in the urgent need to a kind of leakage protecting plug with latch overheat protective function.
Summary of the invention
Applicant of the present invention had once submitted on February 3rd, 2010 to Patent Office of the People's Republic of China that a application number is 2010201069637, name is called the application for a patent for invention of " electric Wiring protection device ", quoted in full, as a reference at this.
An object of the present invention is, in order to overcome above-mentioned defect of the prior art, to provide the electric Wiring protection device with overheat protective function.
According to one embodiment of present invention, provide a kind of electric Wiring protection device, it comprises: phase line path, zero line path, and wherein said phase line path comprises the first switch, and described zero line path comprises second switch; Error detect circuit, comprises a current transformer with a secondary winding, is configured to the mistake in response to described phase line path and zero line path and produces the first erroneous detection signal at described secondary winding; Temperature detect switch (TDS), when temperature exceedes predetermined threshold, described temperature detect switch (TDS) closes, thus produces the second erroneous detection signal; Signal drive circuit, is connected to described secondary winding and described temperature detect switch (TDS), is configured in response to described first erroneous detection signal and/or the second erroneous detection signal and produces drive singal; Trip assembley therefor, is connected to described signal drive circuit, is configured in response to described drive singal and disconnects described first switch and second switch, thus disconnects the connection of phase line path, zero line path.
According to one embodiment of present invention, electric Wiring protection device also comprises: be connected to the first plug blades of described phase line path input and be connected to the second plug blades of described zero line path input; Described temperature detect switch (TDS) is arranged between described first plug blades and the second plug blades.
According to one embodiment of present invention, the described temperature detect switch (TDS) in electric Wiring protection device is arranged at inside described first plug blades, and near described first plug blades, is provided with electric-insulation heat-conduction sheet between described first plug blades and described temperature detect switch (TDS).
According to one embodiment of present invention, the described signal drive circuit in electric Wiring protection device comprises thyristor; One end of described secondary winding is connected to the control pole of described thyristor; The two ends of described temperature detect switch (TDS) are connected respectively to control pole or the anode of described thyristor.
According to one embodiment of present invention, the described current transformer in electric Wiring protection device also comprises: be connected to the first armature winding in described phase line path, the second armature winding be connected in described zero line path.
According to one embodiment of present invention, electric Wiring protection device also comprises ground paths, and this ground paths comprises the 3rd switch; Described current transformer also comprises the 3rd armature winding be connected among described ground paths, and the number of turn of the 3rd armature winding is different from described first armature winding and described second armature winding; Described error detect circuit is also configured in response to the mistake of described ground paths and produces the first erroneous detection signal at described secondary winding; Described trip assembley therefor is configured to also disconnect described 3rd switch in response to described drive singal, thus disconnects the connection of ground paths.
According to one embodiment of present invention, the electric contact that described 3rd switch in electric Wiring protection device comprises a movable cantilever and can contact with each other for a pair, one of them electric contact is located at the movable end of described movable cantilever; Described trip assembley therefor comprises a stopping means; Described movable cantilever is through described stopping means, and described stopping means is for limiting the scope of activities of described movable cantilever.
According to one embodiment of present invention, also comprise in electric Wiring protection device: the first indicator elment, be connected among described signal drive circuit; Second indicator elment, is connected to the two ends of described 3rd switch.
According to one embodiment of present invention, the shield layer of the outlet side being arranged at described phase line path and zero line path is also comprised in electric Wiring protection device; Described current transformer also comprises an armature winding, and one end of this armature winding is connected to described shield layer, the other end is connected to described phase line path input side and between described zero line path input side.
Adopt the electric Wiring protection device in the present invention, the temperature overheating that can cause for a variety of causes provides defencive function, thus provides better guarantee for electrical safety.
Accompanying drawing explanation
Read the following detailed description to non-limiting example by referring to accompanying drawing, other features, objects and advantages of the present invention will become more obvious.
Figure 1 shows that the circuit diagram of the electric Wiring protection device of one embodiment of the present of invention;
Figure 2 shows that the circuit diagram of the electric Wiring protection device of an alternative embodiment of the invention;
Figure 3 shows that the outline drawing of the electric Wiring protection device of one embodiment of the present of invention;
Figure 4 shows that the decomposition chart of the electric Wiring protection device of one embodiment of the present of invention;
Figure 5 shows that the exploded structure chart of the electric Wiring protection device of one embodiment of the present of invention;
Figure 6 shows that the local structural graph of the electric Wiring protection device of one embodiment of the present of invention;
Wherein, same or analogous Reference numeral represents same or analogous device or circuit.
Embodiment
Figure 1 shows that the circuit diagram of the electric Wiring protection device of one embodiment of the present of invention.As shown in Figure 1, the electric Wiring protection device in this embodiment comprises: phase line path 10, zero line path 20, error detect circuit 40, temperature detect switch (TDS) 70, signal drive circuit 50, trip assembley therefor 90.
Phase line path 10 comprises: input 11, output 12 and the first switch 13; When first switch 13 closes, input 11 and output 12 conducting.Zero line path 20 comprises: input 21, output 22 and second switch 23; When second switch 23 closes, input 21 and output 22 conducting.
Error detect circuit 40 comprises a current transformer 49, this current transformer 49 with the first armature winding 41 be connected in phase line path 10, be connected to the second armature winding 42 in zero line path 20 and a secondary winding 45.Current transformer 49 is configured to the mistake in response to phase line path 10 and zero line path 20 and produces the first erroneous detection signal at secondary winding 45.
One end of temperature detect switch (TDS) 70 is connected to signal drive circuit 50, and when temperature exceedes predetermined threshold, temperature detect switch (TDS) 70 closes, thus produces the second erroneous detection signal.
Signal drive circuit 50 is connected to secondary winding 45 and temperature detect switch (TDS) 70, is configured in response to described first erroneous detection signal and/or the second erroneous detection signal and produces drive singal.
Trip assembley therefor 90 is connected to signal drive circuit 50, is configured in response to described drive singal and disconnects the first switch 13 and second switch 23, thus disconnects the connection of phase line path 10, zero line path 20.
Particularly, in this embodiment, signal drive circuit 50 comprises: rectifier bridge 51, thyristor 52; Trip assembley therefor 90 comprises: solenoid 99 and iron core (not shown in figure 1) wherein.One end of secondary winding 45 is connected to the control pole of thyristor 52, and the two ends of temperature detect switch (TDS) 70 are connected respectively to control pole or the anode of thyristor 52.
When this electric Wiring protection device normally works, the first switch 13 and second switch 23 close, conducting between the input of phase line path 10 and output, conducting between the input of zero line path 20 and output.
The second erroneous detection signal that the first erroneous detection signal produced in secondary winding 45 and temperature detect switch (TDS) 70 produce all can produce trigger impulse in the control pole of thyristor 52, thus make thyristor 52 conducting and produce big current signal in rectifier bridge 51, namely described drive singal.Solenoid 99 orders about iron core action wherein under the effect of big current signal, to disconnect the first switch 13 and second switch 23, thus disconnects the connection between the respective input of phase line path 10, zero line path 20 and output.
The electric Wiring protection device of this embodiment also comprises a Test Switchboard 71, and its two ends are connected respectively to phase line path 10 or zero line path 20, and two tie points lay respectively at the both sides of current transformer 49.When Test Switchboard 71 closes, virtual faults signal is produced at the first armature winding 41 and the second armature winding 42, and then the first erroneous detection signal produced in secondary winding 45 is to trigger thyristor 52 conducting, driving trip assembley therefor 90 cuts off the respective connection of phase line path 10, zero line path 20.
Because add the design of temperature detect switch (TDS) 70, the electric Wiring protection device in this embodiment can cut off the respective connection of phase line path 10, zero line path 20 when temperature exceedes predetermined threshold.Especially when electric Wiring protection device produces abnormal temperature change because of fault; electric Wiring protection device in this embodiment can cut off supply of electric power; avoid and continue heat up thus eliminate latent fire hazard, and be that electrical safety provides better guarantee.
In some other embodiment of the present invention, one end of temperature detect switch (TDS) 70 is connected to the control pole of thyristor 52, and the other end is connected to another place in circuit except the anode of thyristor 52.When temperature detect switch (TDS) 70 closes, can produce the second erroneous detection signal, the control pole for thyristor 52 provides the trigger impulse of a positive level.
According to another embodiment of the invention, electric Wiring protection device is two-phase plug, and it also comprises: be connected to the first plug blades of phase line path 10 input and be connected to the second plug blades of zero line path 20 input; Temperature detect switch (TDS) 70 is arranged between the first plug blades and the second plug blades.
According to one embodiment of present invention, the temperature detect switch (TDS) 70 in two-phase plug is arranged at inside the first plug blades of phase line path 10 input, and near the first plug blades.Electric-insulation heat-conduction sheet is provided with between first plug blades and temperature detect switch (TDS) 70.
Fig. 2 shows the circuit diagram of the electric Wiring protection device of an alternative embodiment of the invention, and Fig. 3 to Fig. 6 respectively illustrates outline drawing, decomposition chart, exploded structure chart, the local structural graph of the electric Wiring protection device of this embodiment.
As shown in Figure 2, the electric Wiring protection device in this embodiment comprises: phase line path 10, zero line path 20, ground paths 30, error detect circuit 40, temperature detect switch (TDS) 70, signal drive circuit 50, trip assembley therefor 90.
Phase line path 10 comprises: input 11, output 12 and the first switch 13; When first switch 13 closes, input 11 and output 12 conducting.Zero line path 20 comprises: input 21, output 22 and second switch 23; When second switch 23 closes, input 21 and output 22 conducting.Ground paths 30 comprises: input 31, output 32 and the 3rd switch 33; When 3rd switch 33 closes, input 31 and output 32 conducting.
Current transformer 49 in error detect circuit 40 with the first armature winding 41 be connected in phase line path 10, the second armature winding 42 be connected in zero line path 20, be connected to the 3rd armature winding 43 in ground paths 30 and a secondary winding 45.The number of turn of the 3rd armature winding 43 is different from the first armature winding 41 and the second armature winding 42.Current transformer 49 is configured to produce the first erroneous detection signal in response to phase line path 10 and the mistake of zero line path 20 and/or the mistake of ground paths 30 at secondary winding 45.
One end of temperature detect switch (TDS) 70 is connected to signal drive circuit 50, and when temperature exceedes predetermined threshold, temperature detect switch (TDS) 70 closes, thus produces the second erroneous detection signal.
Signal drive circuit 50 is connected to secondary winding 45 and temperature detect switch (TDS) 70, is configured in response to described first erroneous detection signal and/or the second erroneous detection signal and produces drive singal.
Trip assembley therefor 90 is connected to signal drive circuit 50, is configured in response to described drive singal and disconnects the first switch 13, second switch 23 and the 3rd switch 33, thus the connection that disconnection phase line path 10, zero line path 20, ground paths 30 are respective.
Particularly, in this embodiment, signal drive circuit 50 comprises: rectifier bridge 51, thyristor 52; Trip assembley therefor 90 comprises: solenoid 99 and iron core wherein (not shown in Fig. 2).One end of secondary winding 45 is connected to the control pole of thyristor 52, and the two ends of temperature detect switch (TDS) 70 are connected respectively to control pole or the anode of thyristor 52.
When this electric Wiring protection device normally works; first switch 13, second switch 23, the 3rd switch 33 are all closed; conducting between the input of phase line path 10 and output, conducting between the input of zero line path 20 and output, conducting between the input of ground paths 30 and output.
The second erroneous detection signal that the first erroneous detection signal produced in secondary winding 45 and temperature detect switch (TDS) 70 produce all can produce trigger impulse in the control pole of thyristor 52, thus make thyristor 52 conducting and produce big current signal in rectifier bridge 51, namely described drive singal.Solenoid 99 orders about iron core action wherein under the effect of big current signal, to disconnect the first switch 13, second switch 23 and the 3rd switch 33, thus disconnect the connection between the respective input of phase line path 10, zero line path 20, ground paths 30 and output.
The electric Wiring protection device of this embodiment also comprises a Test Switchboard 71, and its two ends are connected respectively to phase line path 10 or zero line path 20, and two tie points lay respectively at the both sides of current transformer 49.When Test Switchboard 71 closes, virtual faults signal is produced at the first armature winding 41 and the second armature winding 42, and then the first erroneous detection signal produced in secondary winding 45 is to trigger thyristor 52 conducting, driving trip assembley therefor 90 cuts off the respective connection of phase line path 10, zero line path 20, ground paths 30.
The electric Wiring protection device of this embodiment also comprises the first indicator elment 72, second indicator elment 73, safety element 74.Particularly, the first indicator elment 72 and the second indicator elment 73 are light-emitting diode.
First indicator elment 72 one end ground connection, the other end are connected to rectifier bridge 51.When this electric Wiring protection device normally works, the first switch 13 and second switch 23 close, and rectifier bridge 51 switches on power, and the first indicator elment 72 is luminous.When the first switch 13 and second switch 23 disconnect or the input of phase line path 10 and zero line path 20 does not access power supply, the first indicator elment 72 is not luminous.
Second indicator elment 73 and protection component 74 are connected, and are connected to the two ends of the 3rd switch 33.The mistake of phase line path 10 and zero line path 20 and the mistake of ground paths 30 all will cause the 3rd switch 33 to disconnect.If produce electric leakage because of the mistake of ground paths 30, then after the 3rd switch 33 disconnects, leakage current will flow through the second indicator elment 73 and protection component 75, second indicator elment 73 by luminescence.If leakage current is excessive, protection component 74 will be made to fuse, thoroughly cut off the connection between the input 31 of ground paths 30 and output 32.
When a failure occurs it, by observing the state of the first indicator elment 72 and the second indicator elment 73, phase line path 10 and zero line path 20 can be betided to fault, still betiding ground paths 30 and make and judging accurately.
As shown in Figure 3, the electric Wiring protection device of this embodiment is a three-phase power plug, and it comprises: upper cover 101, bottom 111, testing button 106, reset button 107.Wherein testing button 106 and Test Switchboard 71 link together, and press testing button 106 and Test Switchboard 71 will be made to close.
Article three, the input of path comprises respectively: the first plug blades 11, second plug blades 21, the 3rd plug blades 31.
As shown in Figure 4, this three-phase power plug also comprises: tarpaulin 102, support 105, elastic sheet metal 181, cartridge assemblies 109.
Upper cover 101 and support 105 all have the hole of allowing that testing button 106 and reset button 107 are passed through.Tarpaulin 102 is for preventing liquid from aerial infiltration.
Elastic sheet metal 181 is parts for Test Switchboard 71.
Figure 5 shows that the entirety of cartridge assemblies 109 and decompose contrast schematic diagram.As shown in Figure 5, cartridge assemblies 109 comprises wiring board 191 and setting some elements thereon.
Support 97 is fixed on wiring board 191, for fixing and supporting other elements.
3rd plug blades 31 of the first plug blades 11 of phase line path 10 input, the second plug blades 21 of zero line path 20 input, ground paths 30 input is fixed by support 97.The movable end of movable cantilever 15 is provided with an electric contact, and it can contact with each other with another electric contact being connected to the first plug blades 11, common composition the first switch 13.The movable end of movable cantilever 25 is provided with an electric contact, and it can contact with each other with another electric contact being connected to the second plug blades 21, common composition second switch 23.The movable end of movable cantilever 35 is provided with an electric contact, and it can contact with each other with another electric contact being connected to the 3rd plug blades 31, common composition the 3rd switch 33.
Support 97 comprises a cavity 971.This cavity 971 is positioned at the inner side of the first plug blades 11.Temperature detect switch (TDS) 70 is arranged among cavity 971.Shown in Figure 6, be provided with electric-insulation heat-conduction sheet 972 between the first plug blades 11 and temperature detect switch (TDS) 70.Alternatively, the thickness of this electric-insulation heat-conduction sheet 972 is less than 1mm, and its material includes but not limited to identical with support 97.
See Fig. 2, Fig. 4, Fig. 5, between support 97 and wiring board 191, be provided with bobbin 96, iron core 95, snap close 94, stopping means 93, these elements belong to the part of trip assembley therefor 90.Solenoid 99 is wound in bobbin 96.Along the axial motion of bobbin 96 under the magnetic drive that iron core 95 can produce at solenoid 99.One end of iron core 95 connects snap close 94.Snap close 94 is provided with a through hole, and the return pin that reset button 107 connects through the through hole on wiring board 191 and the through hole on snap close 94, and then can engage each other with snap close 94.Reset button 107 and return pin, along its axial motion, can drive snap close 94 and stopping means 93.Stopping means 93 comprises: the arm body 931 and 932 extended to both sides and be positioned at middle U-shaped 933.Arm body 931 is for controlling the action of movable cantilever 15, and arm body 932 is for controlling the action of movable cantilever 25; Movable cantilever 35 is through U-shaped 933, and U-shaped 933, for controlling the action of movable cantilever 35, and limits its scope of activities.
When return pin to engage with snap close 94 and drives stopping means 93 to move, arm body 931,932 and U-shaped 933 by forcing the first switch 13, second switch 23 respectively, the 3rd switch 33 closes.When return pin and snap close 94 depart from each other, stopping means 93 gets back to home position by under the effect of spring or other elements, and the first switch 13, second switch 23, the 3rd switch 33 all disconnect.
The movable cantilever of phase line 15 and the movable cantilever 25 of zero line are arranged at support 97 both sides respectively; The movable cantilever 35 of ground wire is located at centre, and its scope of activities is subject to the strict restriction of U-shaped 933; Such design makes three paths reliably be isolated from each other in the inside of three-phase power plug, improves the reliability of this plug.
Shown in Figure 2, also comprise in the three-phase power plug of this embodiment: the shield layer 29 being arranged at the shield layer 19 of phase line path 10 outlet side, zero line path 20 outlet side; Current transformer 49 also comprises an armature winding 44, and one end of this armature winding 44 is connected to shield layer 19 and 29, and the other end is connected between phase line path 10 input side and zero line path 20 input side.Alternatively, ground paths 30 outlet side also comprises shield layer 39.The breakage failure being designed to power line insulating covering like this provides defencive function.When phase line path 10 and zero line path 20 switch on power, the insulating covering of outlet side is damaged, armature winding 44 will have electric current to flow through, thus induce the first erroneous detection signal at secondary winding 45, cause trip assembley therefor to produce corresponding actions, disconnect the first switch 13, second switch 23, the 3rd switch 33.
Those skilled in the art will be understood that above-described embodiment is all exemplary and nonrestrictive.Those skilled in the art research accompanying drawing, specification and claims basis on, will be understood that and realizes disclosed embodiment other change embodiments.In detail in the claims, term " comprises " and does not get rid of other devices or step; Indefinite article " one " is not got rid of multiple; Term " first ", " second " are for indicating title but not for representing any specific order.Any Reference numeral in claim all should not be understood to the restriction to protection range.The function of the multiple parts occurred in claim can be realized by an independent hardware or software module.Some technical characteristic to appear in different dependent claims and not to mean that and these technical characteristics can not be carried out combining to obtain beneficial effect.
Claims (9)
1. an electric Wiring protection device, is characterized in that, comprising:
Phase line path, zero line path, wherein said phase line path comprises the first switch, and described zero line path comprises second switch;
Error detect circuit, comprises a current transformer with a secondary winding, is configured to the mistake in response to described phase line path and zero line path and produces the first erroneous detection signal at described secondary winding;
Temperature detect switch (TDS), when temperature exceedes predetermined threshold, described temperature detect switch (TDS) closes, thus produces the second erroneous detection signal, wherein, does not cause the generation of leakage current when described temperature detect switch (TDS) closes in described phase line path and zero line path;
Signal drive circuit, is connected to described secondary winding and described temperature detect switch (TDS), is configured in response to described first erroneous detection signal and/or the second erroneous detection signal and produces drive singal; Wherein
Signal drive circuit comprises thyristor;
One end of described secondary winding is connected to the control pole of described thyristor;
The two ends of described temperature detect switch (TDS) are connected respectively to control pole or the anode of described thyristor;
Trip assembley therefor, is connected to described signal drive circuit, is configured in response to described drive singal and disconnects described first switch and second switch, thus disconnects the connection of phase line path, zero line path.
2. electric Wiring protection device according to claim 1, is characterized in that, also comprise:
Be connected to the first plug blades of described phase line path input and be connected to the second plug blades of described zero line path input;
Described temperature detect switch (TDS) is arranged between described first plug blades and the second plug blades.
3. electric Wiring protection device according to claim 2, is characterized in that, described temperature detect switch (TDS) is arranged at inside described first plug blades, and near described first plug blades, is provided with electric-insulation heat-conduction sheet between described first plug blades and described temperature detect switch (TDS).
4. electric Wiring protection device according to any one of claim 1 to 3, is characterized in that, described temperature detect switch (TDS) comprises bimetal release.
5. electric Wiring protection device according to any one of claim 1 to 3, is characterized in that, described current transformer also comprises:
Be connected to the first armature winding in described phase line path, the second armature winding be connected in described zero line path.
6. electric Wiring protection device according to claim 5, is characterized in that, also comprise ground paths, and this ground paths comprises the 3rd switch;
Described current transformer also comprises the 3rd armature winding be connected among described ground paths, and the number of turn of the 3rd armature winding is different from described first armature winding and described second armature winding;
Described error detect circuit is also configured in response to the mistake of described ground paths and produces the first erroneous detection signal at described secondary winding;
Described trip assembley therefor is configured to also disconnect described 3rd switch in response to described drive singal, thus disconnects the connection of ground paths.
7. electric Wiring protection device according to claim 6, is characterized in that,
The electric contact that described 3rd switch comprises a movable cantilever and can contact with each other for a pair, one of them electric contact is located at the movable end of described movable cantilever;
Described trip assembley therefor comprises a stopping means; Described movable cantilever is through described stopping means, and described stopping means is for limiting the scope of activities of described movable cantilever.
8. electric Wiring protection device according to claim 6, is characterized in that, also comprise:
First indicator elment, is connected among described signal drive circuit;
Second indicator elment, is connected to the two ends of described 3rd switch.
9. the electric Wiring protection device according to any one of claims 1 to 3, is characterized in that, also comprises the shield layer of the outlet side being arranged at described phase line path and zero line path;
Described current transformer also comprises an armature winding, and one end of this armature winding is connected to described shield layer, the other end is connected to described phase line path input side and between described zero line path input side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010146078.6A CN102222877B (en) | 2010-04-13 | 2010-04-13 | Electric wiring protection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010146078.6A CN102222877B (en) | 2010-04-13 | 2010-04-13 | Electric wiring protection apparatus |
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| Publication Number | Publication Date |
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| CN102222877A CN102222877A (en) | 2011-10-19 |
| CN102222877B true CN102222877B (en) | 2015-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010146078.6A Active CN102222877B (en) | 2010-04-13 | 2010-04-13 | Electric wiring protection apparatus |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102340124A (en) * | 2010-07-26 | 2012-02-01 | 苏州益而益电器制造有限公司 | Electrical wiring protection device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101431203A (en) * | 2008-08-14 | 2009-05-13 | 钱加灿 | Omnipotence safety plug |
| CN101651272A (en) * | 2008-08-13 | 2010-02-17 | 浙江正泰建筑电器有限公司 | Fire-proof and electric leakage-proof safety plug |
| CN201674206U (en) * | 2010-04-13 | 2010-12-15 | 上海益而益电器制造有限公司 | Electrical connection protector |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4625204B2 (en) * | 2001-07-02 | 2011-02-02 | ウチヤ・サーモスタット株式会社 | Power cord with safety device |
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2010
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101651272A (en) * | 2008-08-13 | 2010-02-17 | 浙江正泰建筑电器有限公司 | Fire-proof and electric leakage-proof safety plug |
| CN101431203A (en) * | 2008-08-14 | 2009-05-13 | 钱加灿 | Omnipotence safety plug |
| CN201674206U (en) * | 2010-04-13 | 2010-12-15 | 上海益而益电器制造有限公司 | Electrical connection protector |
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| CN102222877A (en) | 2011-10-19 |
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Address after: 201703 Shanghai city Qingpu District Metro Economic Zone two Huqingping No. 1 Lane 2933 Applicant after: Yi Er Yi (Group) Co.,Ltd. Address before: 201703 Shanghai city Qingpu District Metro Economic Zone two Huqingping No. 1 Lane 2933 Applicant before: Shanghai ELE Manufacturing Corp. |
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Free format text: CORRECT: APPLICANT; FROM: SHANGHAI ELE MFG. CORP. TO: ELE (GROUP) CO., LTD. |
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