CN204156498U - A kind of self-recoverage switching device - Google Patents
A kind of self-recoverage switching device Download PDFInfo
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- CN204156498U CN204156498U CN201420638026.4U CN201420638026U CN204156498U CN 204156498 U CN204156498 U CN 204156498U CN 201420638026 U CN201420638026 U CN 201420638026U CN 204156498 U CN204156498 U CN 204156498U
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- 239000000203 mixture Substances 0.000 description 3
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Abstract
The utility model provides a kind of self-recoverage switching device, relates to electronic device field, for protecting control circuit, thus ensures that power supply is normal.Described circuit comprises: power supply, control circuit and switching circuit; Described control circuit is connected with described power supply and described switching circuit respectively.The utility model is applied in indoor scene.
Description
Technical field
The utility model relates to electronic device field, particularly relates to a kind of self-recoverage switching device.
Background technology
Self-recoverage switch comprises the control unit of switch element and control switch unit; for recovering the power failure that various interference (such as lightening pulse, harmonic wave etc.) causes; namely when supply line breaks down; relaying protection makes switch element disconnect; control unit, when detecting that switch element disconnects, makes switch element again close in short time interval.Therefore, at unattended operation and power supply quality require higher occasion be widely used.
In the prior art, be usually connected with the switch element of civil power and self-recoverage switch respectively by the control unit of self-recoverage switch, wherein, civil power is used for powering to control unit; Whether control unit is used for sense switch unit and disconnects, and when sense switch unit disconnects, Closing Switch unit, thus ensure that power supply is normal.
But in above-mentioned implementation procedure, when civil power produces overcurrent because suffering the interference such as thunderbolt, because the control unit of self-recoverage switch is electrically connected with city, then overcurrent can flow into this control unit, thus this control unit may be caused to damage, namely this control unit cannot normally work, so can not detect switch element, thus causes abnormal electrical power supply.
Utility model content
Embodiment of the present utility model provides a kind of self-recoverage switching device, for protecting control circuit, thus ensures that power supply is normal.
For achieving the above object, embodiment of the present utility model adopts following technical scheme:
First aspect, embodiment of the present utility model provides a kind of self-recoverage switching device, comprising: power supply, control circuit and switching circuit; Described control circuit is connected with described power supply and described switching circuit respectively.
The utility model embodiment provides a kind of self-recoverage switching device; comprise: power supply; control circuit and switching circuit; wherein; control circuit is connected with power supply and switching circuit respectively; power supply is used for powering to control circuit; because self-recoverage switching device comprises power supply; power supply can being placed on when then using avoids being struck by lightning waits the position of interference, like this, when generation thunder and lightning etc.; power supply can not be subjected to the interference of thunderbolt etc.; then lightning current can not enter control circuit, thus protects the safety of control circuit, and then can ensure that power supply is normal.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The schematic diagram of a kind of self-recoverage switching device that Fig. 1 provides for the utility model;
The schematic diagram of the another kind of self-recoverage switching device that Fig. 2 provides for the utility model;
The schematic diagram of the another kind of self-recoverage switching device that Fig. 3 a provides for the utility model;
The schematic diagram of the another kind of self-recoverage switching device that Fig. 3 b provides for the utility model;
The schematic diagram of the another kind of self-recoverage switching device that Fig. 4 a provides for the utility model;
The schematic diagram of the another kind of self-recoverage switching device that Fig. 4 b provides for the utility model;
The schematic diagram of the another kind of self-recoverage switching device that Fig. 5 a provides for the utility model;
The schematic diagram of the another kind of self-recoverage switching device that Fig. 5 b provides for the utility model;
The schematic diagram of the another kind of self-recoverage switching device that Fig. 6 a provides for the utility model;
The schematic diagram of the another kind of self-recoverage switching device that Fig. 6 b provides for the utility model;
Fig. 7 is the structural representation of a kind of power supply in the self-recoverage switching device shown in Fig. 1;
Fig. 8 is the structural representation of the another kind of power supply in the self-recoverage switching device shown in Fig. 1.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
The utility model provides a kind of self-recoverage switching device, as shown in Figure 1, comprising: power supply 11, control circuit 12 and switching circuit 13.
Described control circuit 12 is connected with described power supply 11 and described switching circuit 13 respectively.
Power supply 11, powers for giving control circuit 12.
Whether control circuit 12, disconnect for sense switch circuit 13, and when sense switch circuit 13 disconnects, Closing Switch circuit 13.
Wherein, switching circuit 13 comprises a switch, and control circuit 12 is connected with the control end of switch; The input of switch is electrically connected with city; The output of switch is connected with electricity consumption main circuit.
Concrete operation principle is: when civil power produces overcurrent because suffering the interference such as thunderbolt, because switch is electrically connected with city, then overcurrent flows into switch, under normal circumstances, this overcurrent is greater than the rated operational current of switch, therefore, when overcurrent flows into, switch disconnects automatically, thus anti-overcurrent here flows into electricity consumption main circuit.And overcurrent is instantaneous, so in order to ensure that electricity consumption main circuit normally can work when overcurrent disappears, needing overlaps switch closes, control circuit 12 plays this effect just, namely control circuit 12 is when voltage switch being detected is zero, then determine that switch disconnects, and closes to control switch and send closed information with the mechanism disconnected, thus control switch is closed with the mechanism disconnected, switch is closed again, ensure that electricity consumption main circuit normally works again.
It should be noted that, control circuit 12 comprises drive motors and signal acquisition circuit etc., and it is prior art, does not repeat them here.
It should be noted that, the power supply 11 that the self-recoverage switching device that the utility model embodiment provides comprises need be placed on to avoid being struck by lightning and wait the position of interference, and namely self-recoverage switching device is applicable to the indoor scenes such as such as Special machine room for communication.
The utility model embodiment provides a kind of self-recoverage switching device; comprise: power supply; control circuit and switching circuit; wherein; control circuit is connected with power supply and switching circuit respectively; power supply is used for powering to control circuit; because self-recoverage switching device comprises power supply; power supply can being placed on when then using avoids being struck by lightning waits the position of interference, like this, when generation thunder and lightning etc.; power supply can not be subjected to the interference of thunderbolt etc.; then lightning current can not enter control circuit, thus protects the safety of control circuit, and then can ensure that power supply is normal.
Further, as shown in Figure 2, described self-recoverage switching device also comprises: inductance 14.
Wherein, the rated operational current of inductance 14 is greater than the rated operational current of control circuit 12.
Inductance 14 is connected on the circuit that power supply 11 is connected with control circuit 12.
Inductance 14, during for preventing from flowing through momentary excess current in control circuit 12, due to instantaneous during this overcurrent; namely frequency is higher, thus the induction reactance of inductance 14 is increased, then the electric current flowing through inductance 14 reduces; thus this overcurrent can be suppressed to flow into power supply 11, namely power supply 11 is protected.
Preferably, the inductance value of inductance 14 can be 6 ~ 10uH (microhenry).
It should be noted that, the restriction that the rated operational current of inductance 14 is greater than the rated operational current of control circuit 12 is to prevent the operating current flowing through control circuit 12 from causing damage to inductance 14.
Wherein, control circuit 12 comprises the control circuit of-48 volt direct current supplys.Or control circuit 12 comprises the control circuit of 220 volts of Alternating Current Power Supplies.
Power supply 11 comprises 220 volts of UPS (Uninterrupt ible Power Supply, uninterrupted power supply).Or power supply 11 comprises-48 volt DC power supplies.Or power supply 11 comprises other DC power supplies except-48 volt DC power supplies.
Concrete, different according to the content that power supply 11 and control circuit 12 comprise, power supply 11 is also different, specific as follows from the concrete connected mode of control circuit 12:
Comprise-48 volt DC power supplies at power supply 11, and when control circuit 12 comprises the control circuit of-48 volt direct current supplys, power supply 11 is connected with control circuit 12.
Concrete, the supply power voltage due to power supply 11 is-48 volt direct voltages, and the supply power voltage needed for control circuit 12 is also-48 volt direct voltages, so power supply 11 can provide normal operating voltage directly to control circuit 12.
Comprise 220 volts of uninterrupted power supply UPS at power supply 11, and when control circuit 12 comprises the control circuit of 220 volts of Alternating Current Power Supplies, power supply 11 is connected with control circuit 12.
Concrete, the supply power voltage due to power supply 11 is 220 volts of alternating voltages, and the supply power voltage needed for control circuit 12 is also 220 volts of alternating voltages, so power supply 11 can provide normal operating voltage directly to control circuit 12.
Comprise-48 volt DC power supplies at power supply 11, and when control circuit 12 comprises the control circuit of 220 volts of Alternating Current Power Supplies, described self-recoverage switching device also comprises: the first inverter circuit.
Wherein, the rated operational current of the first inverter circuit is greater than the rated operational current of the control circuit of 220 volts of Alternating Current Power Supplies.
Described first inverter circuit is connected on the circuit that described power supply 11 is connected with described control circuit 12.
First inverter circuit, for being converted to 220 volts of alternating voltages by-48 volt direct voltages.
Concrete, supply power voltage due to-48 volt DC power supplies is-48 volt direct voltages, and the supply power voltage needed for the control circuit of 220 volts of Alternating Current Power Supplies is 220 volts of alternating voltages, then-48 volt DC power supplies want to power to the control circuit of 220 volts of Alternating Current Power Supplies, need increase by first inverter circuit, adopt the first inverter circuit that-48 volt direct voltages are converted to 220 volts of alternating voltages, and be converted to 220 volts of alternating voltages are inputed to the control circuit of 220 volts of Alternating Current Power Supplies, normal supply power voltage can be had to make the control circuit of 220 volts of Alternating Current Power Supplies.
It should be noted that, the restriction that the rated operational current of the first inverter circuit is greater than the rated operational current of the control circuit of 220 volts of Alternating Current Power Supplies is to prevent the operating current of the control circuit flowing through 220 volts of Alternating Current Power Supplies from causing damage to the first inverter circuit.
It should be noted that, when self-recoverage switching device does not comprise inductance 14, as shown in Figure 3 a, the first inverter circuit 15 is connected on the circuit that-48 volt DC power supply 11b are connected with the control circuit 12b of 220 volts of Alternating Current Power Supplies; When self-recoverage switching device comprises inductance 14, the position relationship of inductance 14 and the first inverter circuit 15 is not limited, wherein, preferred version is the connected mode shown in Fig. 3 b, as shown in Figure 3 b, inductance 14 and the first inverter circuit 15 are all connected on the circuit that-48 volt DC power supply 11b are connected with the control circuit 12b of 220 volts of Alternating Current Power Supplies, and one end of inductance 14 is connected with the control circuit 12b of 220 volts of Alternating Current Power Supplies, and the other end of inductance 14 is connected with the first inverter circuit 15.
Comprise other DC power supplies except-48 volts at power supply 11, and when control circuit 12 comprises the control circuit of 220 volts of Alternating Current Power Supplies, described self-recoverage switching device also comprises: the second inverter circuit.
Wherein, the rated operational current of the second inverter circuit is greater than the rated operational current of the control circuit of 220 volts of Alternating Current Power Supplies.
Described second inverter circuit is connected on the circuit that described power supply 11 is connected with described control circuit 12.
Second inverter circuit, for being converted to 220 volts of alternating voltages by the direct voltage except-48 volts.
Concrete, supply power voltage due to other DC power supplies except-48 volts is the direct voltage except-48 volts, and the supply power voltage needed for the control circuit of 220 volts of Alternating Current Power Supplies is 220 volts of alternating voltages, other DC power supplies then except-48 volts want to power to the control circuit of 220 volts of Alternating Current Power Supplies, need increase by second inverter circuit, adopt the second inverter circuit that the direct voltage except-48 volts is converted to 220 volts of alternating voltages, and be converted to 220 volts of alternating voltages are inputed to the control circuit of 220 volts of Alternating Current Power Supplies, normal supply power voltage can be had to make the control circuit of 220 volts of Alternating Current Power Supplies.
It should be noted that, the restriction that the rated operational current of the second inverter circuit is greater than the rated operational current of the control circuit of 220 volts of Alternating Current Power Supplies is to prevent the operating current of the control circuit flowing through 220 volts of Alternating Current Power Supplies from causing damage to the second inverter circuit.
It should be noted that, when self-recoverage switching device does not comprise inductance 14, as shown in fig. 4 a, the second inverter circuit 16 is connected on the circuit that other DC power supplies 11c except-48 volts is connected with the control circuit 12b of 220 volts of Alternating Current Power Supplies; When self-recoverage switching device comprises inductance 14, the position relationship of inductance 14 and the second inverter circuit 16 is not limited, wherein, preferred version is the connected mode shown in Fig. 4 b, as shown in Figure 4 b, inductance 14 and the second inverter circuit 16 are all connected on the circuit that other DC power supplies 11c except-48 volts is connected with the control circuit 12b of 220 volts of Alternating Current Power Supplies, and one end of inductance 14 is connected with the control circuit 12b of 220 volts of Alternating Current Power Supplies, the other end of inductance 14 is connected with the second inverter circuit 16.
Comprise 220 volts of ups powers at described power supply 11, and when control circuit 12 comprises the control circuit of-48 volt direct current supplys, described self-recoverage switching device also comprises: rectification circuit.
Wherein, the rated operational current of rectification circuit is greater than the rated operational current of the control circuit of-48 volt direct current supplys.
Described rectification circuit is connected on the circuit that described power supply 11 is connected with described control circuit 12.
Rectification unit, for being converted to-48 volt direct voltages by 220 volts of alternating voltages.
Concrete, supply power voltage due to 220 volts of ups power 11a is the alternating voltage of 220 volts, and the supply power voltage needed for control circuit 12a of-48 volt direct current supplys is-48 volt direct voltages, then 220 volts of ups power 11a want to power to the control circuit 12a of-48 volt direct current supplys, need to increase rectification circuit 17, rectification circuit 17 is adopted the alternating voltage of 220 volts to be converted to the direct voltage of-48 volts, and the direct voltage of-48 volts be converted to is inputed to the control circuit 12a of-48 volt direct current supplys, normal supply power voltage can be had to make the control circuit 12a of-48 volt direct current supplys.
It should be noted that, the restriction that the rated operational current of rectification circuit is greater than the rated operational current of the control circuit of-48 volt direct current supplys is to prevent the operating current of the control circuit flowing through-48 volt direct current supplys from causing damage to rectification circuit.
It should be noted that, when self-recoverage switching device does not comprise inductance 14, as shown in Figure 5 a, rectification circuit 17 is connected on the circuit that 220 volts of ups power 11a are connected with the control circuit 12a of-48 volt direct current supplys; When self-recoverage switching device comprises inductance 14, the position relationship of inductance 14 and rectification circuit 17 is not limited, wherein, preferred version is the connected mode shown in Fig. 5 b, as shown in Figure 5 b, inductance 14 and rectification circuit 17 are all connected on the circuit that 220 volts of ups power 11a are connected with the control circuit 12a of-48 volt direct current supplys, and one end of inductance 14 is connected with the control circuit 12a of-48 volt direct current supplys, and the other end of inductance 14 is connected with rectification circuit 17.
Comprise other DC power supplies except-48 volts at described power supply 11, and when control circuit 12 comprises the control circuit of-48 volt direct current supplys, described self-recoverage switching device also comprises: DC voltage converting circuit.
Wherein, the rated operational current of DC voltage converting circuit is greater than the rated operational current of the control circuit of-48 volt direct current supplys.
Described DC voltage converting circuit is connected on the circuit that described power supply 11 is connected with described control circuit 12.
DC voltage converting circuit, for being-48 volt direct voltages by the voltage transitions except-48 volts.
Concrete, supply power voltage due to other DC power supplies except-48 volts is the direct voltage except-48 volts, and the supply power voltage needed for control circuit of-48 volt direct current supplys is-48 volt direct voltages, other DC power supplies then except-48 volts want to power to the control circuit of-48 volt direct current supplys, need to increase DC voltage converting circuit, DC voltage converting circuit is adopted the direct voltage except-48 volts to be converted to the direct voltage of-48 volts, and the direct voltage of-48 volts be converted to is inputed to the control circuit of-48 volt direct current supplys, normal supply power voltage can be had to make the control circuit of-48 volt direct current supplys.
It should be noted that, the restriction that the rated operational current of DC voltage converting circuit is greater than the rated operational current of the control circuit of-48 volt direct current supplys is to prevent the operating current of the control circuit flowing through-48 volt direct current supplys from causing damage to DC voltage converting circuit.
It should be noted that, when self-recoverage switching device does not comprise inductance 14, as shown in Figure 6 a, DC voltage converting circuit 18 is connected on the circuit that other DC power supplies 11c except-48 volts is connected with the control circuit 12a of-48 volt direct current supplys the connected mode of self-recoverage switching device, when self-recoverage switching device comprises inductance 14, the connected mode of self-recoverage switching device as shown in Figure 6 b, and the position relationship of inductance 14 and DC voltage converting circuit 18 is not limited, wherein, preferred version is the connected mode shown in Fig. 6 b, as in Fig. 6 b with shown, inductance 14 and DC voltage converting circuit 18 are all connected on the circuit that other DC power supplies 11c except-48 volts is connected with the control circuit 12a of-48 volt direct current supplys, and one end of inductance 14 is connected with the control circuit 12a of-48 volt direct current supplys, the other end of inductance 14 is connected with DC voltage converting circuit 18.
It should be noted that, the power supply 11 in the utility model can be any one qualified power supply in prior art, does not limit this.
Exemplary, as shown in Figure 7, it is the structural representation of 220 volts of ups power 11a, comprising: surge absorbing circuit 111, rectifier 112, inverter 113, charger 114, battery pack 115, the first switch 116 and second switch 117.
Concrete operation principle is: when civil power exists, and civil power is converted to direct voltage by rectifier 112, then is converted to 220 volts of stable alternating voltages through inverter 113, thus powers to the control circuit 12b of 220 volts of Alternating Current Power Supplies; When inverter 113 transships or breaks down, second switch 117 disconnects by inverter 113, the first switch 116 automatic switching on, thus powers to the control circuit 12b of 220 volts of Alternating Current Power Supplies by civil power; And civil power charges to battery pack 115 by charger 114, when civil power power-off, using battery pack 115 as power supply, 220 volts of alternating voltages of stable output after inverter 113, thus power to the control circuit 12b of 220 volts of Alternating Current Power Supplies; Surge absorbing circuit 111 enters in follow-up circuit for preventing overcurrent, thus protects the safety of subsequent conditioning circuit.
It should be noted that, surge absorbing circuit 111 is that tolerance is more weak, therefore, preferably, need series inductance 14 between the control circuit 12b of 220 volts of ups power 11a and 220 volt Alternating Current Power Supplies, for preventing overcurrent from flowing into 220 volts of ups power 11a further, thus ensure the safety of 220 volts of ups power 11a.
Exemplary, as shown in Figure 8, it is the structural representation of 48 volts of DC power supply 11b, comprising: surge absorbing circuit 118, rectifier 119, charger 120 and battery pack 121.
Concrete operation principle is: when civil power exists, and civil power is converted to-48 volt direct voltages by rectifier 119, thus powers to the control circuit 12a of-48 volt direct current supplys; And civil power charges to battery pack 121 by charger 120, when civil power power-off, power to the control circuit 12a of-48 volt direct current supplys as power supply battery pack 121; Surge absorbing circuit 118 enters in follow-up circuit for preventing overcurrent, thus protects the safety of subsequent conditioning circuit.
It should be noted that, surge absorbing circuit 118 is that tolerance is more weak, therefore, preferably, need series inductance 14 between the control circuit 12a of 48 volts of DC power supply 11b and-48 volts direct current supply, for preventing overcurrent from flowing into 48 volts of DC power supply 11b further, thus ensure the safety of 48 volts of DC power supply 11b.
It should be noted that, the operation principle of other DC power supplies 11c except-48 volt DC power supply 11b and the operation principle of 48 volts of DC power supply 11b similar, do not repeat them here.
It should be noted that, the first inverter circuit 15 and the second inverter circuit 16 all adopt corresponding inverter circuit composition in prior art; Rectification circuit 17 adopts corresponding rectification circuit composition in prior art; DC voltage converting circuit 18 adopts corresponding voltage conversion circuit composition in prior art, does not repeat them here.
The utility model embodiment provides a kind of self-recoverage switching device; comprise: power supply; control circuit and switching circuit; wherein; control circuit is connected with power supply and switching circuit respectively; power supply is used for powering to control circuit; because self-recoverage switching device comprises power supply; power supply can being placed on when then using avoids being struck by lightning waits the position of interference, like this, when generation thunder and lightning etc.; power supply can not be subjected to the interference of thunderbolt etc.; then lightning current can not enter control circuit, thus protects the safety of control circuit, and then can ensure that power supply is normal.Meanwhile, when flowing into overcurrent in control circuit, overcurrent can be suppressed to flow into power supply by inductance unit, thus power supply is protected.
The above; be only embodiment of the present utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; change can be expected easily or replace, all should be encompassed within protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of described claim.
Claims (8)
1. a self-recoverage switching device, is characterized in that, comprising: power supply, control circuit and switching circuit;
Described control circuit is connected with described power supply and described switching circuit respectively.
2. self-recoverage switching device according to claim 1, is characterized in that, described self-recoverage switching device also comprises: inductance;
Described inductance is connected on the circuit that described power supply is connected with described control circuit.
3. self-recoverage switching device according to claim 1 and 2, is characterized in that, described control circuit comprises the control circuit of-48 volt direct current supplys; Described power supply comprises-48 volt DC power supplies.
4. self-recoverage switching device according to claim 1 and 2, is characterized in that, described control circuit comprises the control circuit of 220 volts of Alternating Current Power Supplies; Described power supply comprises 220 volts of uninterrupted power supply UPS.
5. self-recoverage switching device according to claim 1 and 2, is characterized in that, described self-recoverage switching device also comprises: the first inverter circuit;
Described first inverter circuit is connected on the circuit that described power supply is connected with described control circuit;
Described control circuit comprises the control circuit of 220 volts of Alternating Current Power Supplies; Described power supply comprises-48 volt DC power supplies.
6. self-recoverage switching device according to claim 1 and 2, is characterized in that, described self-recoverage switching device also comprises: the second inverter circuit;
Described second inverter circuit is connected on the circuit that described power supply is connected with described control circuit;
Described control circuit comprises the control circuit of 220 volts of Alternating Current Power Supplies; Described power supply comprises other DC power supplies except-48 volts.
7. self-recoverage switching device according to claim 1 and 2, is characterized in that, described self-recoverage switching device also comprises: rectification circuit;
Described rectification circuit is connected on the circuit that described power supply is connected with described control circuit;
Described control circuit comprises the control circuit of-48 volt direct current supplys; Described power supply comprises 220 volts of UPS.
8. self-recoverage switching device according to claim 1 and 2, is characterized in that, described self-recoverage switching device also comprises: DC voltage converting circuit;
Described DC voltage converting circuit is connected on the circuit that described power supply is connected with described control circuit;
Described control circuit comprises the control circuit of-48 volt direct current supplys; Described power supply comprises other DC power supplies except-48 volts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420638026.4U CN204156498U (en) | 2014-10-29 | 2014-10-29 | A kind of self-recoverage switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420638026.4U CN204156498U (en) | 2014-10-29 | 2014-10-29 | A kind of self-recoverage switching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204156498U true CN204156498U (en) | 2015-02-11 |
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ID=52514587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420638026.4U Expired - Lifetime CN204156498U (en) | 2014-10-29 | 2014-10-29 | A kind of self-recoverage switching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204156498U (en) |
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2014
- 2014-10-29 CN CN201420638026.4U patent/CN204156498U/en not_active Expired - Lifetime
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