CN201674206U - Electrical connection protector - Google Patents

Electrical connection protector Download PDF

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Publication number
CN201674206U
CN201674206U CN2010201580020U CN201020158002U CN201674206U CN 201674206 U CN201674206 U CN 201674206U CN 2010201580020 U CN2010201580020 U CN 2010201580020U CN 201020158002 U CN201020158002 U CN 201020158002U CN 201674206 U CN201674206 U CN 201674206U
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CN
China
Prior art keywords
switch
line path
protection device
wiring protection
electric wiring
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Expired - Lifetime
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CN2010201580020U
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Chinese (zh)
Inventor
李成力
张晓明
岳国兰
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Shanghai ELE Manufacturing Corp
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Shanghai ELE Manufacturing Corp
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Priority to CN2010201580020U priority Critical patent/CN201674206U/en
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Abstract

The utility model relates to an electrical connection protector with an overheating protection function, comprising a phase line circuit (10) comprising a first switch (13), a zero line circuit (20) comprising a second switch (23), an error detection circuit (40) comprising a current transformer (49) with a secondary winding (45) and used for generating first error detection signals at the secondary winding for responding to the error of the phase line channel and the zero line channel, a temperature controlled switch, a signal drive circuit (50) and a releasing component (90), wherein when the temperature exceeds the predetermined threshold value, the temperature controlled switch is closed to generate second error detection signals; the signal drive circuit (50) is connected to the secondary winding and the temperature controlled switch and used for responding to the first error detection signals and/or second error detection signals to generate drive signals; and the releasing component (90) is connected to the signal drive circuit and used for responding to the drive signals to cut off a first switch and a second switch. The electrical connection protector can provide better guarantee for electrical safety.

Description

The electricity Wiring protection device
Technical field
The utility model relates to Electrical Safety protection field, relates in particular to the electric Wiring protection device of the breaking characteristics that have between input and the output.
Background technology
For the leakage current of avoiding household electrical appliance damages the user, usually at household electrical appliance, such as electric heater, refrigerator etc., the power supply input side the electric Wiring protection device with leakage current defencive function, for example leakage protecting plug are installed.
In daily life; we find; existing ordinary plug and leakage protecting plug are during normal use; often because problems such as socket quality cause the latch and the loose contact of socket sheet of plug; then cause the latch temperature too high and damage plug; severe patient even cause fire brings huge hidden danger for people's life and property safety.Therefore, press for a kind of leakage protecting plug that has the latch overheat protective function on the market.
The utility model content
Applicant of the present utility model once on February 3rd, 2010 to Patent Office of the People's Republic of China submitted that a application number is 2010201069637, name is called the utility application of " electric Wiring protection device ", quote in full at this, as a reference.
A purpose of the present utility model is the electric Wiring protection device that has overheat protective function in order to overcome above-mentioned defective of the prior art, to provide.
According to an embodiment of the present utility model, a kind of electric Wiring protection device is provided, it comprises: phase line path, zero line path, wherein said phase line path comprises first switch, described zero line path comprises second switch; Error detect circuit comprises a current transformer that has a secondary winding, is configured to produce the first error detection signal in response to the mistake of described phase line path and zero line path at described secondary winding; Temperature detect switch (TDS), when temperature surpasses predetermined threshold, described temperature detect switch (TDS) closure, thus produce the second error detection signal; Signal drive circuit is connected to described secondary winding and described temperature detect switch (TDS), is configured in response to the described first error detection signal and/or the second error detection signal and produces drive signal; Trip assembley therefor is connected to described signal drive circuit, is configured to disconnect described first switch and second switch in response to described drive signal, thus the connection of disconnection phase line path, zero line path.
According to an embodiment of the present utility model, electric Wiring protection device also comprises: second plug blades that is connected in first plug blades of described phase line path input and is connected in described zero line path input; Described temperature detect switch (TDS) is arranged between described first plug blades and second plug blades.
According to an embodiment of the present utility model, the described temperature detect switch (TDS) in the electric Wiring protection device is arranged at the described first plug blades inboard, and near described first plug blades, is provided with the electric-insulation heat-conduction sheet between described first plug blades and the described temperature detect switch (TDS).
According to an embodiment of the present utility model, the described signal drive circuit in the electric Wiring protection device comprises thyristor; One end of described secondary winding is connected to the control utmost point of described thyristor; The two ends of described temperature detect switch (TDS) are connected respectively to the control utmost point or the anode of described thyristor.
According to an embodiment of the present utility model, the described current transformer in the electric Wiring protection device also comprises: be connected in the first elementary winding in the described phase line path, be connected in the second elementary winding in the described zero line path.
According to an embodiment of the present utility model, electric Wiring protection device also comprises the ground wire path, and this ground wire path comprises the 3rd switch; Described current transformer also comprises the 3rd elementary winding that is connected among the described ground wire path, and the number of turn of the 3rd elementary winding is different from the described first elementary winding and the described second elementary winding; Described error detect circuit also is configured to produce the first error detection signal in response to the mistake of described ground wire path at described secondary winding; Described trip assembley therefor is configured to also disconnect described the 3rd switch in response to described drive signal, thereby disconnects the connection of ground wire path.
According to an embodiment of the present utility model, described the 3rd switch in the electric Wiring protection device comprises a movable cantilever and a pair of electric contact that can contact with each other, and 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 passes described stopping means, and described stopping means is used to limit the scope of activities of described movable cantilever.
According to an embodiment of the present utility model, also comprise in the electric Wiring protection device: first indicator elment is connected among the described signal drive circuit; Second indicator elment is connected in the two ends of described the 3rd switch.
According to an embodiment of the present utility model, also comprise the electric screen layer of the outlet side that is arranged at described phase line path and zero line path in the electric Wiring protection device; Described current transformer also comprises an elementary winding, and an end of this elementary winding is connected to described electric screen layer, the other end is connected between described phase line path input side and the described zero line path input side.
Adopt the electric Wiring protection device in the utility model, can provide defencive function, thereby provide better guarantee for electrical safety for the temperature overheating that a variety of causes causes.
Description of drawings
Read following detailed description to non-limiting example by the reference accompanying drawing, other features, objects and advantages of the present utility model will become more obvious.
Figure 1 shows that the circuit diagram of the electric Wiring protection device of an embodiment of the present utility model;
Figure 2 shows that the circuit diagram of the electric Wiring protection device of another embodiment of the present utility model;
Figure 3 shows that the outline drawing of the electric Wiring protection device of an embodiment of the present utility model;
Figure 4 shows that the decomposition chart of the electric Wiring protection device of an embodiment of the present utility model;
Figure 5 shows that the exploded structure chart of the electric Wiring protection device of an embodiment of the present utility model;
Figure 6 shows that the partial structurtes figure of the electric Wiring protection device of an embodiment of the present utility model;
Wherein, same or analogous Reference numeral is represented same or analogous device or circuit.
Embodiment
Figure 1 shows that the circuit diagram of the electric Wiring protection device of an embodiment of the present utility model.As shown in Figure 1, the electric Wiring protection device among 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 first switch 13; During first switch, 13 closures, input 11 and output 12 conductings.Zero line path 20 comprises: input 21, output 22 and second switch 23; During second switch 23 closures, input 21 and output 22 conductings.
Error detect circuit 40 comprises a current transformer 49, and this current transformer 49 has the first elementary winding 41 that is connected in the phase line path 10, is connected in the second elementary winding 42 and a secondary winding 45 in the zero line path 20.Current transformer 49 is configured to produce the first error detection signal in response to the mistake of phase line path 10 and zero line path 20 at secondary winding 45.
One end of temperature detect switch (TDS) 70 is connected to signal drive circuit 50, when temperature surpasses predetermined threshold, and temperature detect switch (TDS) 70 closures, thus produce the second error detection signal.
Signal drive circuit 50 is connected to secondary winding 45 and temperature detect switch (TDS) 70, is configured in response to the described first error detection signal and/or the second error detection signal and produces drive signal.
Trip assembley therefor 90 is connected to signal drive circuit 50, is configured to disconnect first switch 13 and second switch 23 in response to described drive signal, thus the connection of disconnection 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 utmost point of thyristor 52, and the two ends of temperature detect switch (TDS) 70 are connected respectively to the control utmost point or the anode of thyristor 52.
When this electricity Wiring protection device operate as normal, first switch 13 and second switch 23 closures, conducting between the input of phase line path 10 and the output, conducting between the input of zero line path 20 and the output.
The second error detection signal that first error detection signal that produces in the secondary winding 45 and temperature detect switch (TDS) 70 produce all can produce trigger impulse at the control utmost point of thyristor 52, thereby make thyristor 52 conductings and in rectifier bridge 51, produce big current signal, just described drive signal.Solenoid 99 orders about iron core action wherein under the effect of big current signal, disconnecting first switch 13 and second switch 23, thereby disconnect phase line path 10, zero line path 20 separately input and the connection between the 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 closures, produce virtual fault-signal at the first elementary winding 41 and the second elementary winding 42, and then the first error detection signal that produces in secondary winding 45 drives trip assembley therefor 90 and cuts off phase line path 10, zero line path 20 connection separately to trigger thyristor 52 conductings.
Because increased the design of temperature detect switch (TDS) 70, the electric Wiring protection device among this embodiment can cut off phase line path 10, zero line path 20 connection separately when temperature surpasses predetermined threshold.Especially when electric Wiring protection device produces the abnormal temperature variation because of fault; electric Wiring protection device among this embodiment can cut off supply of electric power; thereby having avoided continue heating up has eliminated fire hidden danger, and provides better guarantee for electrical safety.
In some other embodiment of the present utility model, an end of temperature detect switch (TDS) 70 is connected to the control utmost point of thyristor 52, and the other end is connected to another place except the anode of thyristor 52 in the circuit.When temperature detect switch (TDS) 70 closures, can produce the second error detection signal, the trigger impulse of a positive level is provided for the control utmost point of thyristor 52.
According to another embodiment of the present utility model, electric Wiring protection device is the two-phase plug, and it also comprises: second plug blades that is connected in first plug blades of phase line path 10 inputs and is connected in zero line path 20 inputs; Temperature detect switch (TDS) 70 is arranged between first plug blades and second plug blades.
According to an embodiment of the present utility model, the temperature detect switch (TDS) 70 in the two-phase plug is arranged at the first plug blades inboard of phase line path 10 inputs, and near first plug blades.Be provided with the electric-insulation heat-conduction sheet between first plug blades and the temperature detect switch (TDS) 70.
Fig. 2 shows the circuit diagram of the electric Wiring protection device of another embodiment of the present utility model, and Fig. 3 to Fig. 6 shows outline drawing, decomposition chart, exploded structure chart, the partial structurtes figure of the electric Wiring protection device of this embodiment respectively.
As shown in Figure 2, the electric Wiring protection device among this embodiment comprises: phase line path 10, zero line path 20, ground wire path 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 first switch 13; During first switch, 13 closures, input 11 and output 12 conductings.Zero line path 20 comprises: input 21, output 22 and second switch 23; During second switch 23 closures, input 21 and output 22 conductings.Ground wire path 30 comprises: input 31, output 32 and the 3rd switch 33; During the 3rd switch 33 closures, input 31 and output 32 conductings.
Current transformer 49 in the error detect circuit 40 has the first elementary winding 41 that is connected in the phase line path 10, be connected in the second elementary winding 42 in the zero line path 20, be connected in the 3rd elementary winding 43 and a secondary winding 45 in the ground wire path 30.The number of turn of the 3rd elementary winding 43 is different from the first elementary winding 41 and the second elementary winding 42.Current transformer 49 is configured to produce the first error detection signal in response to the mistake of the mistake of phase line path 10 and zero line path 20 and/or ground wire path 30 at secondary winding 45.
One end of temperature detect switch (TDS) 70 is connected to signal drive circuit 50, when temperature surpasses predetermined threshold, and temperature detect switch (TDS) 70 closures, thus produce the second error detection signal.
Signal drive circuit 50 is connected to secondary winding 45 and temperature detect switch (TDS) 70, is configured in response to the described first error detection signal and/or the second error detection signal and produces drive signal.
Trip assembley therefor 90 is connected to signal drive circuit 50, is configured to disconnect first switch 13, second switch 23 and the 3rd switch 33 in response to described drive signal, thereby disconnects phase line path 10, zero line path 20, ground wire path 30 connection separately.
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 among Fig. 2).One end of secondary winding 45 is connected to the control utmost point of thyristor 52, and the two ends of temperature detect switch (TDS) 70 are connected respectively to the control utmost point or the anode of thyristor 52.
When this electricity Wiring protection device operate as normal; first switch 13, second switch 23, the 3rd switch 33 be closure all; conducting between the input of phase line path 10 and the output, conducting between the input of zero line path 20 and the output, conducting between the input of ground wire path 30 and the output.
The second error detection signal that first error detection signal that produces in the secondary winding 45 and temperature detect switch (TDS) 70 produce all can produce trigger impulse at the control utmost point of thyristor 52, thereby make thyristor 52 conductings and in rectifier bridge 51, produce big current signal, just described drive signal.Solenoid 99 orders about iron core action wherein under the effect of big current signal, disconnecting first switch 13, second switch 23 and the 3rd switch 33, thus disconnect phase line path 10, zero line path 20, ground wire path 30 separately input and the connection between the 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 closures, produce virtual fault-signal at the first elementary winding 41 and the second elementary winding 42, and then the first error detection signal that produces in secondary winding 45 drives trip assembley therefor 90 and cuts off phase line path 10, zero line path 20, ground wire path 30 connection separately to trigger thyristor 52 conductings.
The electric Wiring protection device of this embodiment also comprises first indicator elment 72, second indicator elment 73, safety element 74.Particularly, first indicator elment 72 and second indicator elment 73 are light-emitting diode.
First indicator elment, 72 1 end ground connection, the other end are connected to rectifier bridge 51.When this electricity Wiring protection device operate as normal, first switch 13 and second switch 23 closures, rectifier bridge 51 energized, first indicator elment 72 is luminous.When the input of first switch 13 and second switch 23 disconnections or phase line path 10 and zero line path 20 did not insert power supply, first indicator elment 72 was not luminous.
Second indicator elment 73 and protection component 74 are connected, and are connected the two ends of the 3rd switch 33.The mistake of the mistake of phase line path 10 and zero line path 20 and ground wire path 30 all will cause the 3rd switch 33 to disconnect.If produce electric leakage because of the mistake of ground wire path 30, then after the 3rd switch 33 disconnects, leakage current will flow through second indicator elment 73 and protection component 75, the second indicator elments 73 with luminous.If leakage current is excessive, will make protection component 74 fuse, thoroughly cut off the input 31 of ground wire path 30 and the connection between the output 32.
When breaking down, by observing the state of first indicator elment 72 and second indicator elment 73, can betide phase line path 10 and zero line path 20, still betide ground wire path 30 and make accurately and judging fault.
As shown in Figure 3, the electric Wiring protection device of this embodiment is a three phase mains plug, and it comprises: loam cake 101, bottom 111, testing button 106, reset button 107.Wherein testing button 106 links together with Test Switchboard 71, presses testing button 106 and will make Test Switchboard 71 closures.
Article three, the input of path comprises respectively: first plug blades 11, second plug blades 21, the 3rd plug blades 31.
As shown in Figure 4, this three phase mains plug also comprises: tarpaulin 102, support 105, elastic sheet metal 181, cartridge assemblies 109.
All have the hole of allowing that testing button 106 and reset button 107 are passed through on loam cake 101 and the support 105.Tarpaulin 102 is used to prevent that liquid is from aerial infiltration.
Elastic sheet metal 181 is parts of Test Switchboard 71.
Figure 5 shows that the whole of cartridge assemblies 109 and decompose the 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 the wiring board 191, is used for fixing and supports other elements.
The 3rd plug blades 31 of first plug blades 11 of phase line path 10 inputs, second plug blades 21 of zero line path 20 inputs, ground wire path 30 inputs is fixing by support 97.The movable end of movable cantilever 15 is provided with an electric contact, and it can be in contact with one another with another electric contact that is connected to first plug blades 11, forms first switch 13 jointly.The movable end of movable cantilever 25 is provided with an electric contact, and it can be in contact with one another with another electric contact that is connected to second plug blades 21, forms second switch 23 jointly.The movable end of movable cantilever 35 is provided with an electric contact, and it can be in contact with one another with another electric contact that is connected to the 3rd plug blades 31, forms the 3rd switch 33 jointly.
Comprise a cavity 971 in the support 97.This cavity 971 is positioned at the inboard of first plug blades 11.Temperature detect switch (TDS) 70 is arranged among the cavity 971.Referring to shown in Figure 6, be provided with electric-insulation heat-conduction sheet 972 between first plug blades 11 and the temperature detect switch (TDS) 70.Alternatively, the thickness of this electric-insulation heat-conduction sheet 972 is less than 1mm, and it is identical with support 97 that its material includes but not limited to.
Referring to 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.Iron core 95 can be under the magnetic drive that solenoid 99 produces along the axial motion of bobbin 96.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 is connected can be passed through hole on the wiring board 191 and the through hole on the snap close 94, and then is meshing with each other with snap close 94.Reset button 107 and return pin can drive snap close 94 and stopping means 93 along its axial motion.Stopping means 93 comprises: the arm body 931 that extends to both sides and 932 and be positioned in the middle of U type spare 933.Arm body 931 is used to control the action of movable cantilever 15, and arm body 932 is used to control the action of movable cantilever 25; Movable cantilever 35 passes U type spare 933, and U type spare 933 is used to control the action of movable cantilever 35, and limits its scope of activities.
When 94 engagements of return pin and snap close and when driving stopping means 93 and moving, arm body 931,932 and U type spare 933 will force first switch 13, second switch 23, the 3rd switch 33 closures respectively.When return pin and snap close 94 break away from each other, stopping means 93 will be got back to the home position under the effect of spring or other elements, and first switch 13, second switch 23, the 3rd switch 33 all disconnect.
Movable cantilever 15 of phase line and the movable cantilever 25 of zero line are arranged at support 97 both sides respectively; In the middle of the movable cantilever 35 of ground wire was located at, its scope of activities was subjected to the strictness restriction of U type spare 933; Such design makes three paths be isolated from each other reliably in the inside of three phase mains plug, has improved the reliability of this plug.
Referring to shown in Figure 2, also comprise in the three phase mains plug of this embodiment: be arranged at the electric screen layer 19 of phase line path 10 outlet sides, the electric screen layer 29 of zero line path 20 outlet sides; Current transformer 49 also comprises an elementary winding 44, and an end of this elementary winding 44 is connected to electric screen layer 19 and 29, and the other end is connected between phase line path 10 input sides and zero line path 20 input sides.Alternatively, ground wire path 30 outlet sides also comprise electric screen layer 39.The breakage failure that is designed to the power line insulating covering like this provides defencive function.When phase line path 10 and zero line path 20 energized and the insulating covering of outlet side when damaged, elementary winding 44 will have electric current to flow through, thereby induce the first error detection signal at secondary winding 45, cause trip assembley therefor to produce corresponding actions, disconnect first switch 13, second switch 23, the 3rd switch 33.
Those skilled in the art will be understood that the foregoing description all is exemplary and nonrestrictive.Those skilled in the art will be understood that and realize the embodiment of other variations of the embodiment that disclosed on the basis of research accompanying drawing, specification and claims.In claims, term " comprises " does not get rid of other devices or step; Indefinite article " one " is not got rid of a plurality of; Term " first ", " second " are used to indicate title but not are used to represent any specific order.Any Reference numeral in the claim all should not be understood that the restriction to protection range.The function of a plurality of parts that occur in the claim can be realized by independent hardware or software module.Some technical characterictic appears in the different dependent claims and does not mean that and these technical characterictics can not be made up to obtain beneficial effect.

Claims (10)

1. an electric Wiring protection device is characterized in that, comprising:
Phase line path, zero line path, wherein said phase line path comprises first switch, described zero line path comprises second switch;
Error detect circuit comprises a current transformer that has a secondary winding, is configured to produce the first error detection signal in response to the mistake of described phase line path and zero line path at described secondary winding;
Temperature detect switch (TDS), when temperature surpasses predetermined threshold, described temperature detect switch (TDS) closure, thus produce the second error detection signal;
Signal drive circuit is connected to described secondary winding and described temperature detect switch (TDS), is configured in response to the described first error detection signal and/or the second error detection signal and produces drive signal;
Trip assembley therefor is connected to described signal drive circuit, is configured to disconnect described first switch and second switch in response to described drive signal, thus the connection of disconnection phase line path, zero line path.
2. electric Wiring protection device according to claim 1 is characterized in that, also comprises:
Second plug blades that is connected in first plug blades of described phase line path input and is connected in described zero line path input;
Described temperature detect switch (TDS) is arranged between described first plug blades and second plug blades.
3. electric Wiring protection device according to claim 2 is characterized in that, described temperature detect switch (TDS) is arranged at the described first plug blades inboard, and near described first plug blades, is provided with the electric-insulation heat-conduction sheet between described first plug blades and the described temperature detect switch (TDS).
4. according to each described electric Wiring protection device in the claim 1 to 3, it is characterized in that described signal drive circuit comprises thyristor;
One end of described secondary winding is connected to the control utmost point of described thyristor;
The two ends of described temperature detect switch (TDS) are connected respectively to the control utmost point or the anode of described thyristor.
5. according to each described electric Wiring protection device in the claim 1 to 3, it is characterized in that described temperature detect switch (TDS) comprises bimetal release.
6. according to each described electric Wiring protection device in the claim 1 to 3, it is characterized in that described current transformer also comprises:
Be connected in the first elementary winding in the described phase line path, be connected in the second elementary winding in the described zero line path.
7. electric Wiring protection device according to claim 6 is characterized in that, also comprises the ground wire path, and this ground wire path comprises the 3rd switch;
Described current transformer also comprises the 3rd elementary winding that is connected among the described ground wire path, and the number of turn of the 3rd elementary winding is different from the described first elementary winding and the described second elementary winding;
Described error detect circuit also is configured to produce the first error detection signal in response to the mistake of described ground wire path at described secondary winding;
Described trip assembley therefor is configured to also disconnect described the 3rd switch in response to described drive signal, thereby disconnects the connection of ground wire path.
8. electric Wiring protection device according to claim 7 is characterized in that,
Described the 3rd switch comprises a movable cantilever and a pair of electric contact that can contact with each other, and 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 passes described stopping means, and described stopping means is used to limit the scope of activities of described movable cantilever.
9. electric Wiring protection device according to claim 7 is characterized in that, also comprises:
First indicator elment is connected among the described signal drive circuit;
Second indicator elment is connected in the two ends of described the 3rd switch.
10. according to each described electric Wiring protection device in the claim 1 to 3, it is characterized in that, also comprise the electric screen layer of the outlet side that is arranged at described phase line path and zero line path;
Described current transformer also comprises an elementary winding, and an end of this elementary winding is connected to described electric screen layer, the other end is connected between described phase line path input side and the described zero line path input side.
CN2010201580020U 2010-04-13 2010-04-13 Electrical connection protector Expired - Lifetime CN201674206U (en)

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Application Number Priority Date Filing Date Title
CN2010201580020U CN201674206U (en) 2010-04-13 2010-04-13 Electrical connection protector

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Application Number Priority Date Filing Date Title
CN2010201580020U CN201674206U (en) 2010-04-13 2010-04-13 Electrical connection protector

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CN201674206U true CN201674206U (en) 2010-12-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102222877A (en) * 2010-04-13 2011-10-19 上海益而益电器制造有限公司 Electric wiring protection apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102222877A (en) * 2010-04-13 2011-10-19 上海益而益电器制造有限公司 Electric wiring protection apparatus
CN102222877B (en) * 2010-04-13 2015-06-10 益而益(集团)有限公司 Electric wiring protection apparatus

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