CN208142877U - A kind of auto-power-off device and the power-off system including the auto-power-off device - Google Patents
A kind of auto-power-off device and the power-off system including the auto-power-off device Download PDFInfo
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- CN208142877U CN208142877U CN201820619913.5U CN201820619913U CN208142877U CN 208142877 U CN208142877 U CN 208142877U CN 201820619913 U CN201820619913 U CN 201820619913U CN 208142877 U CN208142877 U CN 208142877U
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Abstract
The utility model belongs to intelligent terminal charge control technical field; it is related to a kind of auto-power-off device and the power-off system including the auto-power-off device; solving existing breaker device, structure is complicated, and functional reliability is low, it is difficult to the problem of reliably protecting intelligent terminal battery.The device is characterized in that：Pedestal is parallel with spinning reduction disk and the two is respectively fixedly connected at torsionspring both ends；Spinning reduction disk inner conductive outer surface insulation, and thereon fixed two be not in contact with each other and between the two be current path sliding conduction piece；The alternating current lead-in clamp and controllable electric output wiring terminal being installed on insulator foot are matched with two sliding conduction pieces respectively；Pedestal, electromagnet, elastic component and positioning clamping pin are successively connected；Spinning reduction disk is equipped with location hole compatible with positioning clamping pin；Electromagnet, electromagnet power supply and controller are sequentially connected；Electromagnet magnetic force is greater than elastic component elastic force.The utility model additionally provides a kind of power-off system including above-mentioned auto-power-off device.
Description
Technical field
The utility model belongs to intelligent terminal charge control technical field, and in particular to a kind of auto-power-off device and including
The power-off system of the auto-power-off device.
Background technique
The generally use and the appearance of various life kind app of the intelligent terminals such as mobile phone, tablet computer, lead to intelligent terminal
After utilization rate greatly improves, therefore the charging time of intelligent terminal is arranged in sleeping at night by many users, and general feelings
The time that intelligent terminal is electrically connected with city under condition is up to 8-10 hours.Although the power management module of general intelligence terminal all has
There is charging protection function, but power management module is used to carry out charge protection, not by intelligent terminal and city after charging complete
Electricity is physically separated, when power management module breaks down, it will causes protection to fail, so that intelligent terminal is the whole night always
In charged state.The intelligent terminal charging time is too long, special other than generally resulting in battery loss, shorter battery life
In the case of can also cause the generations of the matters of aggravation such as kindling, explosion, similar report also frequently appears on network and TV.
The above-mentioned generation for causing adverse consequences due to power management module failure in order to prevent, it is conventional at present to use
The measure that automatically powers off be：Using the timer preset charged time, when charging between when reaching preset time, timer disconnects,
Cut off the connection of intelligent terminal and alternating current.But existing electronic timer and mechanical timer, structure is more complicated, and work can
It is lower by property.
Utility model content
The purpose of the utility model is to provide a kind of auto-power-off device and including the power-off system of the auto-power-off device,
More complex to solve existing breaker device structure, functional reliability is lower, it is difficult to reliably protect to intelligent terminal battery
The technical issues of.
The utility model is characterized in that the technical scheme adopted is that a kind of auto-power-off device：
Including pedestal, spinning reduction disk, torsionspring, alternating current lead-in clamp, controllable electric output wiring terminal, sliding conduction
Piece, electromagnet, electromagnet power supply, elastic component, positioning clamping pin and controller；
Pedestal is arranged in parallel with spinning reduction disk；It is provided with torsionspring between pedestal and spinning reduction disk, reverses bullet
One end of spring and pedestal are connected, and the other end and spinning reduction disk are connected；
Pedestal is insulator, and alternating current lead-in clamp and controllable electric output wiring terminal are fixedly installed on pedestal；Rotation is multiple
There are two non-touching sliding conduction pieces, the inside of spinning reduction disk to be made of an electrically conducting material for fixed setting on the disk of position, appearance
Bread is covered with insulating materials, and being connected between two sliding conduction pieces by spinning reduction disk is current path；Alternating current input wires
Column and controllable electric output wiring terminal are matched with two sliding conduction pieces respectively；
The electromagnet, elastic component and positioning clamping pin are successively set between pedestal and spinning reduction disk, electromagnet with
Pedestal is connected, and the both ends of elastic component are connected with electromagnet and positioning clamping pin respectively, and positioning clamping pin is made of strong magnetic material；Rotation
Location hole is provided on reseting disk, the location hole is matched with positioning clamping pin；
Electromagnet is connect with electromagnet power supply；The magnetic force that electromagnet generates after being powered is greater than the elastic force of elastic component, positioning card
Pin can overcome the elastic force of elastic component under the magneticaction of electromagnet, exit the location hole；Torsionspring turns from energy storage state
When returning free state, alternating current lead-in clamp and controllable electric output wiring terminal are detached from sliding conduction piece；
The controller is connect with electromagnet power supply.
Further, in order to keep structure simple, the elastic component is spring.
Further, in order to guarantee that positioning clamping pin can be moved along the axis direction of the location hole always, will not occur partially
From the auto-power-off device further includes guide post；
The guide post is both ends with the hollow cylinder of extraneous perforation；One end of guide post is connected with electromagnet；Elasticity
Part and positioning clamping pin are arranged in the cavity of guide post, and positioning clamping pin stretches out the cavity of guide post.
Further, in order to facilitate the connection between auto-power-off device and alternating current and intelligent terminal charger, it is described from
Dynamic circuit breaker electric installation further includes plug and socket；
The firewire of the connection of the firewire of alternating current lead-in clamp and plug, controllable electric output wiring terminal and socket connects, plug
Zero curve and socket zero curve connect.
Further, in order to guarantee Electrical Safety, the auto-power-off device further includes cover board；
The cover board and pedestal are connected；The outside of cover board is arranged in plug and socket；Pedestal, torsionspring, alternating current input
Binding post, controllable electric output wiring terminal, sliding conduction piece, electromagnet, electromagnet power supply, elastic component, positioning clamping pin and control
Device is arranged inside cover board；Through-hole is provided on cover board, spinning reduction disk stretches out the through-hole, and matches with the via clearance
It closes.
Further, it repairs for convenience, the cover board is removably fixed with pedestal.
A kind of power-off system, is characterized in that：The power-off system include intelligent terminal, intelligent terminal charger and
Above-mentioned auto-power-off device；
The intelligent terminal is connect with controller；The firewire of intelligent terminal charger socket power one end and controllable electricity output
The zero curve direct or indirect connection of binding post direct or indirect connection, zero curve and alternating current；The other end of intelligent terminal charger connects
Connect intelligent terminal；
App is installed, the app has intelligent terminal electric quantity detection function, and works as intelligent terminal electricity on intelligent terminal
When full electricity, it can be issued to controller and connect electromagnet power supply instruction.
Further, reliably controller and intelligent terminal are attached for convenience, are enabled the controller to reliably
The connection electromagnet power supply instruction of intelligent terminal sending is received, is provided with wifi communication module on the controller；Controller
It is communicated with intelligent terminal by wifi communication module.
Further, in order to make the function of realizing signal transmission between intelligent terminal and controller, and intelligent terminal is filling
Before electricity, does not need to carry out the operating code of complexity, be provided with mic sound pick-up on the controller；Intelligent terminal and controller are logical
Mic sound pick-up is crossed to be communicated.
The utility model has the beneficial effects that：
(1) auto-power-off device of the utility model controls electromagnet by controller and is powered, and controls auto-power-off device
Cut off alternating current；It is specially：When controller control electromagnet is powered, under the action of electromagnet magnetic force, positioning clamping pin overcomes
The elastic force of elastic component, exits location hole；Spinning reduction disk and the sliding conduction piece being connected with spinning reduction disk are in torsionspring
Under drive, relative to base rotation, the alternating current lead-in clamp and controllable electric output wiring terminal being fixedly installed on pedestal, which are detached from, to be slided
Moving conductive piece realizes alternating current and intelligent terminal charger reliably carrying out automatic physically-isolated function；Need again to
When intelligent terminal charges, it can be manually rotated spinning reduction disk and resetted.And the rotation of the auto-power-off device of the utility model
It is made of an electrically conducting material inside reseting disk, outer surface is coated with insulating materials, passes through spinning reduction between two sliding conduction pieces
Disk connection is that current path does not increase structural member, structure when being connected as current path between two such sliding conduction piece
Relatively simple, functional reliability is high.Therefore, the utility model more complex, functional reliability that solves existing breaker device structure
It is lower, it is difficult to the technical issues of reliably intelligent terminal battery is protected.
(2) auto-power-off device of the utility model is preferably provided with plug and socket, can by plug directly with
City's electrical connection, intelligent terminal charger can be directly plugged on the socket, easy to connect.
(3) intelligent terminal charger is electrically connected by auto-power-off device with city in the power-off system of the utility model, when
When controller receives the connection electromagnet power supply instruction of intelligent terminal app sending, electromagnet energization can be automatically controlled, is realized
The automatic physical isolation of intelligent terminal charger and alternating current；In addition by intelligent terminal in the power-off system of the utility model
The mode of upper installation app, is measured in real time the practical charging situation of intelligent terminal, and when the full electricity of intelligent terminal electricity,
It can be issued to controller and connect electromagnet power supply instruction, the practical charging situation according to intelligent terminal has been achieved to intelligent end
The function that the cutting of end and alternating current is controlled；Furthermore by being mounted on intelligent terminal in the power-off system of the utility model
App intelligent terminal electricity is measured in real time, the accuracy of the charge capacity data detected in this way and reliability are all higher.
(4) it is preferably provided with wifi communication module on the controller in the power-off system of the utility model；Controller with
Intelligent terminal is communicated by wifi communication module, receives the connection electromagnet power supply instruction that intelligent terminal issues；In this way, control
It can be easily and reliably attached between device and intelligent terminal processed, signal transmission is reliable.
Detailed description of the invention
Fig. 1 is the main view of the utility model auto-power-off device embodiment；
Fig. 2 is the cross-sectional view of the line A-A along Fig. 1；
Fig. 3 is the cross-sectional view of the line B-B along Fig. 2；
Fig. 4 is the structural schematic diagram of the utility model power-off system embodiment.
Each label is described as follows in figure：
1- intelligent terminal, 2- intelligent terminal charger, 300- auto-power-off device, 301- pedestal, 302- spinning reduction disk,
303- torsionspring, 304- alternating current lead-in clamp, 305- controllable electric output wiring terminal, 306- sliding conduction piece, 307- electromagnetism
Iron, 308- electromagnet power supply, 309- elastic component, 310- positioning clamping pin, 311- controller, 312- guide post, 313- plug, 314-
Socket, 315- cover board.
Specific embodiment
The utility model is described in detail with reference to the accompanying drawings and detailed description.
Referring to Fig. 1 to Fig. 3, a kind of auto-power-off device of the utility model, including pedestal 301, spinning reduction disk 302, torsion
Turn spring 303, alternating current lead-in clamp 304, controllable electric output wiring terminal 305, sliding conduction piece 306, electromagnet 307, electromagnetism
Ferroelectricity source 308, elastic component 309, positioning clamping pin 310 and controller 311.The connection relationship of each components is as follows：
Pedestal 301 is arranged in parallel with spinning reduction disk 302；Torsion is provided between pedestal 301 and spinning reduction disk 302
Spring 303, one end of torsionspring 303 and pedestal 301 are connected, and the other end and spinning reduction disk 302 are connected；Pedestal 301 is by exhausted
Edge material is made, and alternating current lead-in clamp 304 and controllable electric output wiring terminal 305 are fixedly installed on pedestal 301；It is multiple in rotation
There are two non-touching sliding conduction pieces 306 for fixed setting on the disk 302 of position；The inside of spinning reduction disk 302 is by conductive material
It is made, outer surface is coated with insulating materials, is connected between two sliding conduction pieces 306 by spinning reduction disk 302 and is led to for electric current
Road；Alternating current lead-in clamp 304 and controllable electric output wiring terminal 305 are matched with two sliding conduction pieces 306 respectively.
Electromagnet 307, elastic component 309 and positioning clamping pin 310 be successively set on pedestal 301 and spinning reduction disk 302 it
Between, electromagnet 307 and pedestal 301 are connected, and the both ends of elastic component 309 are connected with electromagnet 307 and positioning clamping pin 310 respectively, fixed
Position bayonet lock 310 is made of strong magnetic material；It is provided with location hole on spinning reduction disk 302, the location hole and 310 phase of positioning clamping pin
Adaptation.
Before electromagnet 307 is powered, positioning clamping pin 310 is inserted into above-mentioned location hole, and torsionspring 303 is in energy storage shape at this time
State, alternating current lead-in clamp 304 and controllable electric output wiring terminal 305 are in contact with two sliding conduction pieces 306 respectively, and alternating current is defeated
Enter between binding post 304 and controllable electric output wiring terminal 305 in circuit on state.
Electromagnet 307 is connect with electromagnet power supply 308；Controller 311 is connect with electromagnet power supply 308；Electromagnet 307 is logical
The magnetic force generated after electricity is greater than the elastic force of elastic component 309.In this way, when controller 311 controls electromagnet power supply 308 to electromagnet
After 307 are powered, under the magneticaction of electromagnet 307, positioning clamping pin 310 overcomes the elastic force of elastic component 309 to exit above-mentioned positioning
Hole；Spinning reduction disk 302 rotates under the drive of torsionspring 303 relative to pedestal 301, and drives and be fixed at
Two sliding conduction pieces 306 rotation on spinning reduction disk 302；In this way, when torsionspring 303 goes back to free shape from energy storage state
When state, the alternating current lead-in clamp 304 and controllable electric output wiring terminal 305 being fixed on pedestal 301 are detached from sliding conduction
Piece 306, the circuitry cuts between alternating current lead-in clamp 304 and controllable electric output wiring terminal 305.In the present embodiment, elastic component
309 be spring.
Referring to fig. 2, in order to guarantee that positioning clamping pin 310 can be moved along the axis direction of above-mentioned location hole always, will not occur
Deviate, is additionally provided with guide post 312 on the auto-power-off device of the present embodiment；Guide post 312 is both ends with extraneous perforation
One end of hollow cylinder, guide post 312 is connected with electromagnet 307, and elastic component 309 and positioning clamping pin 310 are arranged in guide post 312
Cavity in, and positioning clamping pin 310 stretch out guide post 312 cavity.
Referring to Fig. 1, in the present embodiment, in order to facilitate the company between auto-power-off device and alternating current and intelligent terminal charger
It connects, plug 313 and socket 314 is additionally provided on auto-power-off device；Alternating current lead-in clamp 304 passes through plug 313 and alternating current
Firewire connection, controllable electric output wiring terminal 305 connect by socket 314 with the firewire of intelligent terminal charger, plug 313
Zero curve is connect with the zero curve of socket 314.In this way, alternating current, intelligent terminal charger and socket 314 can be connected by plug 313
Connection.
Referring to fig. 2, in order to guarantee Electrical Safety, cover board 315, cover board are additionally provided on the auto-power-off device of the present embodiment
315 are preferably made of insulating material；Plug 313 and socket 314 are arranged outside cover board 315；Pedestal 301, torsionspring
303, alternating current lead-in clamp 304, controllable electric output wiring terminal 305, sliding conduction piece 306, electromagnet 307, electromagnet power supply
308, elastic component 309, positioning clamping pin 310 and controller 311 are arranged inside cover board 315；It is provided on cover board 315 logical
Hole, spinning reduction disk 302 stretches out the through-hole, and cooperates with the via clearance；In this way, when the auto-power-off device cuts off alternating current
Afterwards, when needing to charge to intelligent terminal 1 again, it is convenient to carry out spinning reduction to spinning reduction disk 302 manually, connect city
Electricity.In the present embodiment, cover board 315 is detachably connected with pedestal 301 by screw；In this way, as zero be located inside cover board 315
When component breaks down, replaced with can be convenient.
Referring to fig. 4, a kind of power-off system including above-mentioned auto-power-off device 300, the power-off system is in addition to including above-mentioned
Outside auto-power-off device 300, which further includes intelligent terminal 1 and intelligent terminal charger 2；Its specific connection relationship
It is as follows：
Intelligent terminal 1 is connect with controller 311；The firewire and controllable electric of 2 socket power one end of intelligent terminal charger are defeated
The zero curve direct or indirect connection of 305 direct or indirect connection of binding post out, zero curve and alternating current；Intelligent terminal charger 2 it is another
One end connects intelligent terminal 1.In this embodiment, 2 socket power one end of intelligent terminal charger is directly plugged on socket 314,
Plug 313 connects alternating current.App is installed on above-mentioned intelligent terminal 1, which has 1 electric quantity detection function of intelligent terminal, and works as
When 1 electricity of intelligent terminal is full electric, connection electromagnet power supply 308 can be issued to controller 311 and is instructed, cutting alternating current.
Reliably controller 311 and intelligent terminal 1 are attached for convenience, controller 311 is enable reliably to connect
The connection electromagnet power supply 308 for receiving the sending of intelligent terminal 1 instructs, and is provided with wifi communication in the present embodiment on controller 311
Module, controller 311 are communicated with intelligent terminal 1 by wifi communication module.In addition in the present embodiment on controller 311
It is arranged outside wifi communication module, controller 311 and intelligent terminal can also be made by the way that mic sound pick-up is arranged on controller 311
1 establishes communication；Specially：Intelligent terminal 1, which issues, connects 308 sound instruction of electromagnet power supply, and mic sound pick-up receives the sound and refers to
It enables, electromagnet power supply 308 is connected in the then control of controller 311, to cut off alternating current.When using mic sound pick-up, in order to avoid occurring
The audio signal that intelligent terminal 1 issues fixed sequence program, such as the such sequence of serge ... serge ... serge ... can be set in malfunction
Column, and issue 3 guarantees instruction and be received.
Auto-power-off device using the utility model and the power-off system including the auto-power-off device, can reliably by
Alternating current is physically isolated automatically with intelligent terminal charger 2；And the practical charging situation of energy foundation intelligent terminal 1 is to intelligence
Terminal 1 and the cutting of alternating current are controlled；Furthermore to the electricity of intelligent terminal 1 by the way of installing app on intelligent terminal 1
It is detected, the accuracy of the charge capacity data of detection and reliability are higher.Therefore, the utility model can be widely applied
When night intelligent terminal 1 charges, shield to the battery of intelligent terminal 1.
Claims (9)
1. a kind of auto-power-off device, it is characterised in that：
It is defeated including pedestal (301), spinning reduction disk (302), torsionspring (303), alternating current lead-in clamp (304), controllable electric
Binding post (305), sliding conduction piece (306), electromagnet (307), electromagnet power supply (308), elastic component (309), positioning card out
Sell (310) and controller (311)；
Pedestal (301) is arranged in parallel with spinning reduction disk (302)；It is provided between pedestal (301) and spinning reduction disk (302)
Torsionspring (303), one end and pedestal (301) of torsionspring (303) are connected, and the other end and spinning reduction disk (302) are connected；
Pedestal (301) is insulator, is fixedly installed alternating current lead-in clamp (304) on pedestal (301) and controllable electricity output connects
Terminal (305)；There are two non-touching sliding conduction piece (306), spinning reduction disks for fixed setting on spinning reduction disk (302)
(302) inside is made of an electrically conducting material, and outer surface is coated with insulating materials, passes through rotation between two sliding conduction pieces (306)
Turning reseting disk (302) connection is current path；Alternating current lead-in clamp (304) and controllable electric output wiring terminal (305) respectively with
Two sliding conduction pieces (306) match；
The electromagnet (307), elastic component (309) and positioning clamping pin (310) are successively set on pedestal (301) and spinning reduction
Between disk (302), electromagnet (307) and pedestal (301) are connected, and the both ends of elastic component (309) are respectively with electromagnet (307) and calmly
Position bayonet lock (310) is connected, and positioning clamping pin (310) is made of strong magnetic material；Spinning reduction disk is provided with location hole on (302),
The location hole is adapted with positioning clamping pin (310)；
Electromagnet (307) is connect with electromagnet power supply (308)；The magnetic force that electromagnet (307) generates after being powered is greater than elastic component
(309) elastic force, positioning clamping pin (310) can overcome the elastic force of elastic component (309), move back under the magneticaction of electromagnet (307)
The location hole out；When torsionspring (303) goes back to free state from energy storage state, alternating current lead-in clamp (304) and controllable
Electricity output binding post (305) is detached from sliding conduction piece (306)；
The controller (311) connect with electromagnet power supply (308).
2. a kind of auto-power-off device according to claim 1, it is characterised in that：The elastic component (309) is spring.
3. a kind of auto-power-off device according to claim 2, it is characterised in that：
It further include guide post (312)；
The guide post (312) is both ends with the hollow cylinder of extraneous perforation；The same electromagnet in one end of guide post (312)
(307) it is connected；Elastic component (309) and positioning clamping pin (310) are arranged in the cavity of guide post (312), and positioning clamping pin (310)
Stretch out the cavity of guide post (312).
4. a kind of auto-power-off device according to claim 3, it is characterised in that：
It further include plug (313) and socket (314)；
Alternating current lead-in clamp (304) is connect with the firewire of plug (313), controllable electric output wiring terminal (305) and socket (314)
Firewire connection, the zero curve of plug (313) connect with the zero curve of socket (314).
5. a kind of auto-power-off device according to claim 4, it is characterised in that：
It further include cover board (315)；
The cover board (315) and pedestal (301) are connected；Plug (313) and socket (314) are arranged in the outside of cover board (315)；Bottom
Seat (301), torsionspring (303), alternating current lead-in clamp (304), controllable electric output wiring terminal (305), sliding conduction piece
(306), electromagnet (307), electromagnet power supply (308), elastic component (309), positioning clamping pin (310) and controller (311) are equal
Setting is internal in cover board (315)；Be provided with through-hole on cover board (315), spinning reduction disk (302) stretches out the through-hole, and with institute
State via clearance cooperation.
6. a kind of auto-power-off device according to claim 5, it is characterised in that：The cover board (315) and pedestal (301)
It is removably fixed with.
7. a kind of power-off system, it is characterised in that：
The power-off system includes that intelligent terminal (1), intelligent terminal charger (2) and claim 1 to 6 are any described automatic
Breaker device (300)；
The intelligent terminal (1) connect with controller (311)；The firewire of intelligent terminal charger (2) socket power one end with can
Control electricity output binding post (305) direct or indirect connection, the zero curve direct or indirect connection of zero curve and alternating current；Intelligent terminal charging
The other end of device (2) connects intelligent terminal (1)；
App is installed, the app has intelligent terminal (1) electric quantity detection function, and works as intelligent terminal (1) on intelligent terminal (1)
When electricity is full electric, it can be issued to controller (311) and connect electromagnet power supply (308) instruction.
8. a kind of power-off system according to claim 7, it is characterised in that：Wifi is provided on the controller (311)
Communication module；Controller (311) is communicated with intelligent terminal (1) by wifi communication module.
9. a kind of power-off system according to claim 7, it is characterised in that：Mic is provided on the controller (311) to pick up
Sound device；Intelligent terminal (1) is communicated with controller (311) by mic sound pick-up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820619913.5U CN208142877U (en) | 2018-04-27 | 2018-04-27 | A kind of auto-power-off device and the power-off system including the auto-power-off device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820619913.5U CN208142877U (en) | 2018-04-27 | 2018-04-27 | A kind of auto-power-off device and the power-off system including the auto-power-off device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208142877U true CN208142877U (en) | 2018-11-23 |
Family
ID=64311233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820619913.5U Active CN208142877U (en) | 2018-04-27 | 2018-04-27 | A kind of auto-power-off device and the power-off system including the auto-power-off device |
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| CN (1) | CN208142877U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108429320A (en) * | 2018-04-27 | 2018-08-21 | 唐宓 | A kind of auto-power-off device and the power-off system including the auto-power-off device |
| CN112904065A (en) * | 2021-03-29 | 2021-06-04 | 国家电网有限公司 | Electric energy meter capable of automatically cutting off power supply in case of abnormal power supply |
-
2018
- 2018-04-27 CN CN201820619913.5U patent/CN208142877U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108429320A (en) * | 2018-04-27 | 2018-08-21 | 唐宓 | A kind of auto-power-off device and the power-off system including the auto-power-off device |
| CN112904065A (en) * | 2021-03-29 | 2021-06-04 | 国家电网有限公司 | Electric energy meter capable of automatically cutting off power supply in case of abnormal power supply |
| CN112904065B (en) * | 2021-03-29 | 2022-06-24 | 国家电网有限公司 | Electric energy meter capable of automatically cutting off power supply in case of abnormal power supply |
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