CN208768048U - A kind of switchgear - Google Patents
A kind of switchgear Download PDFInfo
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- CN208768048U CN208768048U CN201821350533.2U CN201821350533U CN208768048U CN 208768048 U CN208768048 U CN 208768048U CN 201821350533 U CN201821350533 U CN 201821350533U CN 208768048 U CN208768048 U CN 208768048U
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Abstract
The utility model embodiment discloses a kind of switchgear, and the switchgear includes: that single firewire switchs and for changing the electronic switch of firewire on off operating mode when determining that the state of single firewire switch changes；Wherein, the electronic switch is separately connected single firewire switch by firewire and electrical equipment, the electronic switch connect between zero curve and firewire.In this way, electronic switch can change firewire on off operating mode, and then the switch control to electrical equipment may be implemented when changing the state of single firewire switch；It is switched by using single firewire, can satisfy the layout type of single firewire switch；Also, the electronic switch in switchgear uses zero live wire power getting mode, takes electric energy power stronger.
Description
Technical Field
The utility model relates to a switch control technique of electrical apparatus especially relates to a switchgear.
Background
At present, in office and home lighting wiring systems, a layout manner of a single live wire switch is gradually used, where the single live wire switch refers to a switch that is connected to a live wire but not to a zero wire, where the live wire is a power line for outputting electric energy and may be represented by "L" in a circuit diagram, the zero wire is an electric wire for forming a working circuit, and may be represented by "N" in the circuit diagram; obviously, a single live wire switch can only adopt a single live wire to get electricity.
The intelligent panel switches cannot be used due to the fact that a layout mode of a single-live-wire switch is commonly used in office and home lighting wiring systems, and most of the intelligent switch panels on the current market use a zero-live-wire power supply mode; in addition, even if there are some single live wire intelligence switches in the existing market, this kind of single live wire intelligence switch also has following problem: 1) the single-live-wire intelligent switch can only adopt a single live wire to get electricity, and a working loop is not constructed by using a zero line, so that the electricity getting capability of the single-live-wire intelligent switch is weaker, for example, the single-live-wire intelligent switch needs to be powered by an additional direct-current power supply, the power of the direct-current power supply is usually smaller, and the electricity getting capability of the single-live-wire intelligent switch is weaker; 2) single live wire intelligence switch is owing to get the electricity through single live wire, therefore, single live wire intelligence switch is with consumer (like lamps and lanterns) series connection access electric wire netting, the electric current size that flows through single live wire intelligence switch and lamps and lanterns is the same, if the electric current that flows through single live wire intelligence switch and lamps and lanterns is less, can lead to single live wire intelligence switch can not normally work, if the electric current that flows through single live wire intelligence switch and lamps and lanterns is great, can cause the influence to the work of consumer, for example, when the consumer is lamps and lanterns, can lead to lamps and lanterns to appear intermittent type nature flash of light or incandescent lamp to close the time have red silk scheduling problem, also appear the ghost fire problem.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a desire provides a switchgear, can satisfy the layout mode of single live wire switch to can avoid because single live wire intelligence switch adopts single live wire to get the problem that the electricity brought.
The technical scheme of the utility model is realized like this:
an embodiment of the utility model provides a switchgear, switchgear includes:
the single live wire switch and the electronic switch are used for changing the on-off state of the live wire when the state of the single live wire switch is determined to be changed; wherein,
the electronic switch is connected with the single live wire switch and the electric equipment through the live wire respectively, and the electronic switch is connected between the zero line and the live wire.
In the above scheme, the single live wire switch is a mechanical switch.
In the above scheme, the mechanical switch is a single-pole double-throw switch, and two stationary contacts of the single-pole double-throw switch are both connected with a live wire.
In the above aspect, the electronic switch includes:
the device comprises a relay used for controlling the on-off of a live wire and a controller used for changing the working state of the relay when the state of the single live wire switch is determined to be changed.
In the above scheme, the electronic switch further comprises a capacitor for supplying power to the controller and the relay when the single live wire switch is switched off, and the capacitor is connected between the zero line and the live wire.
In the above scheme, the capacitor is a super capacitor.
In the above solution, the switch device further includes: the electronic switch is in wireless communication connection with the remote control equipment through the wireless communication device.
An embodiment of the utility model provides an among the switchgear, switchgear includes: the single live wire switch and the electronic switch are used for changing the on-off state of the live wire when the state of the single live wire switch is determined to be changed; the electronic switch is connected with the single live wire switch and the electric equipment through the live wire respectively, and the electronic switch is connected between the zero line and the live wire. Therefore, when the state of the single live wire switch is changed, the electronic switch can change the on-off state of the live wire, and further can realize the on-off control of the electric equipment; by adopting the single live wire switch, the layout mode of the single live wire switch can be met; and, electronic switch among the switchgear adopts the zero live wire to get the electric mode rather than single live wire to get the electric mode, gets the electric power stronger, can avoid because single live wire intelligence switch adopts single live wire to get the problem that the electricity brought.
Drawings
Fig. 1 is a schematic structural diagram of a switchgear according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another switchgear according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an internal structure of an intelligent switch actuator according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an overhead closed state of a mechanical switch according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an intermediate idle state of a mechanical switch according to an embodiment of the present invention;
fig. 6 is a schematic view of the lower closed state of the mechanical switch according to the embodiment of the present invention;
fig. 7 is a schematic diagram of a work flow of a switchgear according to an embodiment of the present invention.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
First embodiment
Fig. 1 is a schematic structural diagram of a switchgear according to an embodiment of the present invention, as shown in fig. 1, the switchgear may include:
the single live wire switch 101 and the electronic switch 102 are used for changing the on-off state of the live wire L when the state of the single live wire switch 101 is determined to be changed; wherein,
the electronic switch 102 is connected with the single live wire switch 101 and the electric equipment 103 through a live wire L respectively, and the electronic switch 102 is connected between a zero wire N and the live wire L.
Here, the single live wire switch 101 is located on the live wire L, and is a switch for controlling the on-off of the live wire L, and the single live wire switch 101 is a switch that can be directly controlled by a user, that is, the user can directly change the state of the single live wire switch 101; the electronic switch 102 is located between the single live wire switch 101 and the electric equipment 103; the electronic switch 102 is a zero-live switch, which refers to a switch simultaneously connected to a zero line N and a live line L, and the zero-live switch can get electricity through the zero line N and the live line L, namely, the zero-live switch can get electricity through a zero-live line electricity-getting mode; the electric equipment 103 is located between the zero line N and the live line L and can get electricity through a zero live line electricity-getting mode.
The state of the single live wire switch 101 can be divided into a connection state and a disconnection state, when the single live wire switch 101 is connected, the current on the live wire L can flow to the electronic switch 102 through the single live wire switch 101, and the electronic switch 102 can get electricity by adopting a zero live wire electricity-taking mode as the electronic switch 102 is connected between the zero line N and the live wire L; so, electronic switch 102 among the switchgear adopts the zero live wire to get the electric mode rather than the single live wire and gets the electric mode, can provide sufficient electric energy for electronic switch, no longer need adopt outside power supply mode, can avoid because single live wire intelligence switch adopts the single live wire to get the problem that the electricity brought.
When single live wire switch 101 disconnection, because the electric current on the live wire L can not flow to electronic switch 102 through single live wire switch, electronic switch 102 can not get the electricity through the zero live wire mode of getting electricity.
In practical implementation, the electronic switch 102 may determine whether the state of the single live wire switch 101 changes, and when it is determined that the state of the single live wire switch 101 changes, the on-off state of the live wire L is changed, so that the switching operation of the electric device 103 may be implemented, that is, the electric device 103 may be powered, or the electric device 103 may be powered off; specifically, when the electronic switch 102 controls the live wire L to be turned on, if the electronic switch 102 determines that the state of the single live wire switch 101 changes, the live wire L may be controlled to be turned off, so as to stop supplying power to the electric device 103; when the electronic switch 102 controls the live wire L to be turned off, if the electronic switch 102 determines that the state of the single live wire switch 101 changes, the live wire L can be controlled to be turned on, and then the power supply to the electric equipment 103 is realized.
It should be noted that when the electronic switch 102 determines that the state of the single live wire switch 101 is not changed, the on/off state of the live wire L is not changed.
For the implementation manner of the electronic switch 102 determining the state of the single live wire switch 101, for example, a voltage signal on the live wire received by the electronic switch 102 may be detected, a change of the received voltage signal may be determined, and whether the state of the single live wire switch 101 changes or not may be determined by analyzing the change of the voltage signal.
Further, after analyzing the change of the voltage signal, if it is determined that the change of the voltage signal is caused by the change of the state of the single live wire switch 101, it is determined that the state of the single live wire switch 101 is changed, otherwise, it is determined that the state of the single live wire switch 101 is not changed, for example, for a 220V live wire, if the detected voltage jumps from 220V to 0V, or from 0V to 220V, it is indicated that the state of the single live wire switch 101 is changed, and it can be considered that the change of the voltage signal is caused by the user changing the state of the single live wire switch 101; if the detected voltage does not jump from 220V to 0V or from 0V to 220V, for example, the detected voltage changes from 220V to 210V, the voltage change may be considered to be caused by the user changing the state of the single hot switch 101, and in this case, the voltage change may be caused by voltage instability or other reasons.
It can be seen that the electronic switch 102 can detect the voltage variation of the live wire, and through the analysis of the voltage variation, the misoperation which may be caused by the unstable voltage and other conditions can be eliminated, that is, the electronic switch 102 does not change the on-off state of the live wire L when determining that the voltage variation is caused by the unstable voltage and other reasons.
To sum up, when the user operates the single live wire switch 101, the user may be considered to input an on instruction or an off instruction for the electric equipment 103; when the state of the single live wire switch 101 changes, it may be considered that an on command or an off command is sent to the electronic switch 102 through the live wire L, and the electronic switch 102 recognizes the on command or the off command by recognizing the change of the live wire voltage and performs an on/off operation on the electric device; here, the on command is for instructing to supply power to the electric device 103, and the off command is for instructing to stop supplying power to the electric device 103.
In the related art, the single-live-wire intelligent switch has weaker electricity taking capability and lower reliability, the research and development difficulty of a working power circuit of the single-live-wire intelligent switch is higher, and the single-live-wire intelligent switch is easy to have the problem of ghost fire, and in the embodiment of the utility model, the layout mode of the single-live-wire switch can be met by adopting the single-live-wire switch; and, electronic switch among the switchgear adopts the zero live wire to get the electric mode rather than single live wire to get the electric mode, gets the electric power stronger, can avoid because single live wire intelligence switch adopts single live wire to get the problem that the electricity brought.
In one embodiment, the single live wire switch 101 is a mechanical switch, for example, the single live wire switch 101 may be a push-type switch disposed on a wall surface, and the shape of the push-type switch is similar to that of a common wall-in switch, and a user can directly change the state of the single live wire switch 101 by pressing the single live wire switch 101.
In one embodiment, the mechanical switch is a single-pole double-throw switch, and both stationary contacts of the single-pole double-throw switch are connected with a live line L; here, no matter which contact point the moving end of the single-pole double-throw switch contacts, the single-pole double-throw switch is in an on state, and the current on the live wire L can flow to the electronic switch 102 through the single-pole double-throw switch; that is, the single-pole double-throw switch is usually in an on state, and only in the process of changing the stationary contact to be contacted by the moving end of the single-pole double-throw switch, the state of the single-pole double-throw switch will send a short change, that is, the state of the single-pole double-throw switch is in an off state for a short time, and by utilizing this characteristic, the single-pole double-throw switch can be considered to transmit an on command or an off command to the electronic switch 102 through the live wire.
In one embodiment, the electronic switch 102 may include a relay for controlling the on/off of the live wire, and a controller for changing the operating state of the relay upon determining a change in state of the single live wire switch; the controller is specifically used for detecting the live wire voltage, analyzing the change of the live wire voltage, and sending a corresponding control signal to the relay when the situation that the change of the live wire voltage is caused by the change of the state of the single live wire switch 101 is determined; the relay is used for changing the on-off state of the live wire L when receiving a control signal from the controller. In practical applications, the controller may be implemented by a Micro Controller Unit (MCU) or the like.
In an embodiment, the electronic switch 102 may further include a capacitor for powering the controller when the single live switch is turned off, the capacitor being connected between the neutral line and the live line; here, the capacitor in the electronic switch 102 may be charged or discharged, specifically, when the single live wire switch 101 is in an on state, the capacitor in the electronic switch 102 may be charged, and when the single live wire switch 101 is in the on state, the capacitor in the electronic switch 102 starts to be discharged, so as to supply power to the relay and the controller, that is, when the single live wire switch 101 is in the on state and changes to the off state, the power supply mode of the electronic switch 102 is changed from a zero live wire power supply mode to a capacitor power supply mode, that is, when the single live wire switch 101 is turned off, the electronic switch 102 may be supplied with constant power, so as to ensure the normal operation of the electronic switch 102.
Further, when the single-live wire switch 101 is the single-pole double-throw switch described above, the single-pole double-throw switch is normally in an on state, and only in a process that the moving end of the single-pole double-throw switch changes the stationary contact to be contacted, the state of the single-pole double-throw switch is changed briefly, so that the capacitor in the electronic switch 102 can be charged sufficiently due to the fact that the single-pole double-throw switch is in the on state for a long time, so that the capacitor in the electronic switch 102 stores sufficient electric energy, and further, sufficient electric energy is provided for the electronic switch 102 when the capacitor is discharged.
In an alternative embodiment, the capacitor in the electronic switch 102 is a super capacitor, and the super capacitor can store enough electric energy when charging; for example, the electronic switch 102 may be supplied with the power required for 5 seconds of normal operation when the single live wire switch 101 is turned off.
In an embodiment, the switch device may further include a wireless communication device and a remote control device for controlling the on/off of the electric device, and the electronic switch 102 is connected with the remote control device through the wireless communication device in a wireless communication manner.
In specific implementation, the remote control device may send an on command or an off command to the wireless communication device, and the wireless communication device forwards the received command to the electronic switch 102; the electronic switch 102 may control the operating state of the relay according to the received instruction, so as to supply power to the electric device 103, or stop supplying power to the electric device 103.
In the related art, a battery-powered remote switch may be installed for an intelligent switch of an electric appliance; the remote control switch is used for sending a remote control instruction to the intelligent switch to control the state of the intelligent switch, so that power supply to the electric appliance is realized, or the electric appliance is stopped; however, the above control scheme for the intelligent switch has the problems of large wireless transmission delay, wireless conflict, large power consumption of the remote controller and the like.
The above-mentioned control scheme to intelligent switch only adopts the remote control instruction to realize the control to the electrical apparatus, and the utility model discloses switchgear both can adopt local single live wire switch 101 to carry out on-off control to consumer 103, also can adopt remote control equipment to carry out on-off control to consumer 103, that is to say, consumer 103's on-off control mode is the coexistent mode of a local control and remote control, so, can control consumer 103's switch in a flexible way.
For the implementation manner of the remote control device, in an example, the remote control device may be implemented by a cloud platform, that is, the cloud platform may be remotely connected to the electronic switch 102, so as to implement remote control of the electronic switch 102.
In a specific example, the cloud platform may be a server in the cloud, and in actual implementation, a user may control a mobile phone Application (App) or a web end to directly log in the cloud platform, and input a corresponding instruction, thereby implementing remote control on the electronic switch 102.
Second embodiment
In order to further embody the object of the present invention, further illustration is made on the basis of the foregoing embodiments of the present invention.
In a second embodiment of the present invention, the single live wire switch 101 is a mechanical switch.
Fig. 2 is the utility model discloses another kind of switchgear's structure schematic diagram, as shown in fig. 2, switchgear can include mechanical switch 201 and intelligence switch executor 202, and intelligence switch executor 202 includes the electronic switch 102 of above-mentioned record, and intelligence switch executor 202 passes through live wire L and connects mechanical switch 201 and consumer 103 respectively, and intelligence switch executor 202 connects between zero line N and live wire L.
Here, the mechanical switch 201 is a single-pole double-throw switch, two stationary contacts of the mechanical switch 201 are an upper contact and a lower contact, respectively, and when the moving end of the mechanical switch 201 contacts the upper contact, the mechanical switch 201 can be considered to be in an upper closed state; when the moving end of the mechanical switch 201 contacts the lower contact, the mechanical switch 201 may be considered to be in a down-set closed state; it can be seen that the mechanical switch 201 is in the on state whether the mechanical switch 201 contacts the upper contact or the lower contact; the mechanical switch 201 is in the off state only during the transmission switching of the contacted stationary contact of the moving end of the mechanical switch 201, and at this time, the mechanical switch 201 can be considered to be in the intermediate idle state.
Obviously, during the process of changing the stationary contact to be contacted by the mechanical switch 201, the intelligent switch actuator 202 can detect the voltage jump, and then realize the switch control of the electric equipment 103 through the control of the internal relay.
Fig. 3 is a schematic diagram of an internal structure of an intelligent switch actuator in an embodiment of the present invention, as shown in fig. 3, the intelligent switch actuator 202 includes a relay 301, an electric energy conversion device 302, a super capacitor 303 and a wireless communication device 203, where the electric energy conversion device 302 is connected between a zero line N and a live line L, and the electric energy conversion device 302 is connected to the super capacitor 303, and the electric energy conversion device 302 can implement the functions of the controller described above; here, when the mechanical switch 201 is turned on, the electric energy conversion device 302 takes electricity by using a zero-live line electricity taking method, and the electric energy conversion device 302 can convert the received voltage and output a proper voltage to the super capacitor 303 to charge the super capacitor 303; the electric energy conversion equipment 302 can detect the voltage of the live wire in real time, and when the electric energy conversion equipment 302 determines that voltage jump is generated and the voltage jump is caused by the change of the state of the mechanical switch 201 by a user, the working state of the relay 301 is controlled to be changed, the on-off of the output live wire is controlled, and further the actual requirement of controlling the electric equipment 103 is met; in addition, when the mechanical switch 201 is in the intermediate idling state, the super capacitor 303 outputs electric energy to the electric energy conversion device 302 (i.e., performs discharging), and the electric energy conversion device 302 maintains its normal operation according to the received electric energy.
The operation of the switchgear according to the embodiments of the present invention will be described below by way of example.
Fig. 4 is a schematic diagram of an upper closed state of the mechanical switch according to the embodiment of the present invention, as shown in fig. 4, the moving end of the mechanical switch 201 contacts the upper contact a1, but does not contact the lower contact a 2; fig. 5 is a schematic diagram of the mechanical switch according to the embodiment of the present invention in an intermediate idle state, as shown in fig. 5, the moving end of the mechanical switch 201 does not contact the upper contact a1 and the lower contact a 2; fig. 6 is a schematic view of the downward closed state of the mechanical switch according to the embodiment of the present invention, as shown in fig. 6, the moving end of the mechanical switch 201 contacts the lower contact a2, but does not contact the upper contact a 1.
Fig. 7 is a schematic diagram of a work flow of a switching device according to an embodiment of the present invention, as shown in fig. 7, the work flow may include: a device static flow 701, a user on operation flow 702, and a user off operation flow 703.
Here, the device static flow 701 represents the work flow of the switching device when the mechanical switch 201 is in the upper closed state or the lower closed state, and in conjunction with fig. 4 and fig. 6, the device static flow may include: when the mechanical switch 201 is in the upper closed state or the lower closed state, the intelligent switch actuator 202 may take electricity in a zero-live line electricity taking manner and perform charging operation on the super capacitor 303, that is, the super capacitor 303 stores electricity; the intelligent switch actuator 202 keeps the working state of the relay 301 unchanged.
In one example, before executing the user opening operation process 702, the mechanical switch 201 is in the upper closed state shown in fig. 4, the intelligent switch actuator 202 controls the live wire L to be disconnected by controlling the operating state of the relay 301, and the electric device 103 is in the stop operating state; in conjunction with fig. 4, 5, and 6, the user opening operation flow 702 may include: a user directly changes the state of the mechanical switch 201, the mechanical switch 201 is switched from an upper closed state to a lower closed state, before and after the state of the mechanical switch 201 is switched, the working flow of the switch device is the above-mentioned static flow of the device, and in the state switching process of the mechanical switch 201, when the mechanical switch 201 is in a middle idle state, the electricity taking mode of the intelligent switch actuator 202 is changed from a zero live wire electricity taking mode to a super capacitor 303 for supplying electricity; when the mechanical switch 201 is switched from the upper closed state to the lower closed state, the intelligent switch actuator 202 may detect a voltage jump signal, for example, when the live line L is an ac power line of 220V, the intelligent switch actuator 202 may detect a voltage jump signal of 220V-0V-220V; after the intelligent switch actuator 202 captures the voltage jump signal, by analyzing the voltage jump signal, it is determined that the voltage jump signal is caused by a user changing the state of the mechanical switch 201, the operating state of the relay 301 may be changed, that is, by controlling the operating state of the relay 301, the live wire L is controlled to be connected, the electric device 103 starts to operate, and the electric device 103 is turned on.
In one example, before executing the user closing operation process 703, the mechanical switch 201 is in a closed state shown in fig. 6, the intelligent switch actuator 202 controls the live wire L to be connected by controlling the working state of the relay 301, and the electric device 103 is in a working state; with reference to fig. 4, 5, and 6, the user closing operation flow 703 may include: a user directly changes the state of the mechanical switch 201, the mechanical switch 201 is switched from a lower closed state to an upper closed state, before and after the state of the mechanical switch 201 is switched, the working flow of the switch device is the above-mentioned static flow of the device, and in the state switching process of the mechanical switch 201, when the mechanical switch 201 is in a middle idle state, the electricity taking mode of the intelligent switch actuator 202 is changed from a zero live wire electricity taking mode to a super capacitor 303 for supplying electricity; when the mechanical switch 201 is switched from the lower closed state to the upper closed state, the intelligent switch actuator 202 may detect a voltage jump signal, for example, when the live line L is an ac power line of 220V, the intelligent switch actuator 202 may detect a voltage jump signal of 220V-0V-220V; after the intelligent switch actuator 202 captures the voltage jump signal, by analyzing the voltage jump signal, it is determined that the voltage jump signal is caused by a user changing the state of the mechanical switch 201, and the working state of the relay 301 can be changed, that is, by controlling the working state of the relay 301, the live wire L is controlled to be disconnected, the electric device 103 stops working, and the off operation of the electric device 103 is realized.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A switchgear, characterized in that it comprises:
the single live wire switch and the electronic switch are used for changing the on-off state of the live wire when the state of the single live wire switch is determined to be changed; wherein,
the electronic switch is connected with the single live wire switch and the electric equipment through the live wire respectively, and the electronic switch is connected between the zero line and the live wire.
2. The switchgear as claimed in claim 1, wherein said single live wire switch is a mechanical switch.
3. The switchgear device according to claim 2, characterized in that said mechanical switch is a single pole double throw switch, both stationary contacts of which are connected to a live line.
4. The switchgear device according to claim 1, wherein said single live wire switch is a push switch.
5. The switching device according to any one of claims 1 to 4, wherein the electronic switch comprises:
the device comprises a relay used for controlling the on-off of a live wire and a controller used for changing the working state of the relay when the state of the single live wire switch is determined to be changed.
6. The switchgear device according to claim 5, wherein said electronic switch further comprises a capacitor for powering said controller and relay when said single line switch is open, said capacitor being connected between neutral and line.
7. The switching device according to claim 6, wherein the controller is a Micro Control Unit (MCU).
8. The switchgear as claimed in claim 6, wherein said capacitor is a super capacitor.
9. The switchgear as claimed in claim 1, further comprising: the electronic switch is in wireless communication connection with the remote control equipment through the wireless communication device.
10. The switchgear device according to claim 1, wherein the electrical equipment is a light fixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821350533.2U CN208768048U (en) | 2018-08-21 | 2018-08-21 | A kind of switchgear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821350533.2U CN208768048U (en) | 2018-08-21 | 2018-08-21 | A kind of switchgear |
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| Publication Number | Publication Date |
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| CN208768048U true CN208768048U (en) | 2019-04-19 |
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| CN201821350533.2U Active CN208768048U (en) | 2018-08-21 | 2018-08-21 | A kind of switchgear |
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