CN208890661U - A kind of safe potential device and the socket with safe potential device - Google Patents
A kind of safe potential device and the socket with safe potential device Download PDFInfo
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- CN208890661U CN208890661U CN201821161939.6U CN201821161939U CN208890661U CN 208890661 U CN208890661 U CN 208890661U CN 201821161939 U CN201821161939 U CN 201821161939U CN 208890661 U CN208890661 U CN 208890661U
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Abstract
A kind of safe potential device and the socket with safe potential device, the safe potential device include rectification circuit, transforming circuit, inversion rectification circuit and controller.Rectification circuit is connected with controller；Transforming circuit is connected with rectification circuit and controller respectively, under the control of the controller, isolation transformation processing direct current signal to obtain variable voltage signal, and sends variable voltage signal to inversion rectification circuit；Inversion rectification circuit is connected with transforming circuit and controller respectively, under the control of the controller, receiving variable voltage signal, and convert variable voltage signal as output signal.It can be seen that, the case where implementing the safe potential device and the socket with safe potential device, enabling to safe potential device to realize isolation transformation under the control of the controller, avoid electric leakage appearance, to improve the safety of potential device when in use, the probability that peril occurs is reduced.
Description
Technical field
The utility model relates to electronic fields, in particular to a kind of safe potential device and have safe transformation dress
The socket set.
Background technique
Transformer is one of very important equipment in electric system, its operating condition directly affects the peace of electric system
Entirely.However, common transformer is the device for changing alternating voltage using the principle of electromagnetic induction in people's life at present, it should
Kind transformer is in prolonged use it is possible that coil aging, the probability occurred so as to cause electric shock accidents increase.
Meanwhile people are also using the security transformer with short-circuit protection, although this kind of security transformer has short-circuit protection
Device, but the generation of drain conditions can not be fundamentally avoided, this is allowed for, and transformer is in use, and safety also meets
Not actual needs.
Utility model content
In view of the above problems, the utility model provides a kind of safe potential device and inserting with safe potential device
The case where seat enables to safe potential device to realize isolation transformation under the control of the controller, avoids electric leakage appearance, thus
The safety of potential device when in use is improved, the probability that peril occurs is reduced.
To achieve the goals above, the utility model adopts the following technical solutions:
In a first aspect, the utility model provides a kind of safe potential device, the safe potential device includes rectified current
Road, transforming circuit, inversion rectification circuit and controller, wherein
The rectification circuit is connected with the controller, for receiving AC signal and being converted to the AC signal
Direct current signal, and the direct current signal is sent to the transforming circuit, the direct current signal is sent to the controller；
The transforming circuit is connected with the rectification circuit and the controller respectively, for the control in the controller
Under system, isolation transformation processing is carried out to the direct current signal and obtains variable voltage signal, and sends the variable voltage signal to described inverse
Become rectification circuit；
The inversion rectification circuit is connected with the transforming circuit and the controller respectively, in the controller
Control under, receive the variable voltage signal, and the variable voltage signal is converted into output signal.
As an alternative embodiment, the rectification circuit includes bridge rectifier and protection inductance, the bridge
Formula rectification circuit includes exchange end, DC terminal and control terminal, wherein
The protection inductance is connected by the exchange end with the bridge rectifier；
The transforming circuit is connected by the DC terminal with the bridge rectifier；
The controller is connected with the bridge rectifier by the control terminal.
As an alternative embodiment, the transforming circuit includes transformation capacitor, the first ac-dc converter circuit, turns
Change circuit and the second ac-dc converter circuit, wherein
The transformation capacitor and first ac-dc converter circuit are both connected to the described straight of the bridge rectifier
Flow end, wherein the transformation capacitor is in parallel with first ac-dc converter circuit；
First ac-dc converter circuit is connected with the controller, for converting under the control of the controller
The direct current signal is the first adjustment signal；
The conversion circuit is connected with first ac-dc converter circuit and second ac-dc converter circuit respectively
It connects, carries out isolation transformation conversion for receiving the first adjustment signal, and to the first adjustment signal, obtain second adjustment
Signal；
Second ac-dc converter circuit is connected with the controller, for converting under the control of the controller
The second adjustment signal is variable voltage signal.
As an alternative embodiment, first ac-dc converter circuit is full bridge inverter, in institute
Under the control for stating controller, the direct current signal is converted as the first adjustment signal.
As an alternative embodiment, the conversion circuit carries out high-frequency ac change to the first adjustment signal
Pressure, obtains the second adjustment signal.
As an alternative embodiment, the inversion rectification circuit include inversion capacitor, inversion conversion circuit and
Inversion inductor, wherein
The inversion capacitor is connected with second ac-dc converter circuit；Wherein, the inversion capacitor with it is described inverse
It is in parallel to become conversion circuit；
The inversion conversion circuit is connected with the controller, for receiving the change under the control of the controller
Signal is pressed, and converts the variable voltage signal as output signal；
The inversion inductor is connected with the inversion conversion circuit, for exporting the output signal.
As an alternative embodiment, the controller is EG8010 integrated chip, the EG8010 integrated chip
For realizing the control to the transforming circuit and the inversion rectification circuit by the control to pulse signal.
As an alternative embodiment, the pulse signal is high-frequency pulse signal.
As an alternative embodiment, the pulse signal includes two seed pulse signals.
Second aspect, the utility model provide a kind of socket with safe potential device, and the socket drives transformation
Circuit includes safe potential device described in socket circuit and first aspect, wherein socket circuit is used to connect in the socket
After power supply, the power on/off of receptacle sockets is controlled.
According to safe potential device provided by the utility model and the socket with safe potential device, the safe transformation dress
It sets including rectification circuit, transforming circuit, inversion rectification circuit and controller, wherein rectification circuit receives AC signal, and will
AC signal is converted to direct current signal, so that transforming circuit isolation transformation handles the direct current signal and obtains variable voltage signal, then leads to
It crosses inversion rectification circuit and converts variable voltage signal as output signal, to complete the process of transformation.As it can be seen that this kind of safe potential device
With the socket with safe potential device, can avoid being directly connected to by isolation transformation processing, so that the possibility of electric leakage is avoided,
And then the safety of safe potential device when in use is improved, reduce the probability that peril occurs.
To enable the above objects, features, and advantages of the utility model to be clearer and more comprehensible, preferred embodiment is cited below particularly, and
Cooperate appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to the scope of the utility model as.
Fig. 1 is the circuit diagram for the safe potential device that the utility model first embodiment provides；
Fig. 2 is the circuit diagram for the safe potential device that the utility model second embodiment provides.
Main element symbol description:
100- rectification circuit；101- bridge rectifier；200- transforming circuit；The first ac-dc converter circuit of 201-；
202- conversion circuit；The second ac-dc converter circuit of 203-；300- inversion rectification circuit；301- inversion conversion circuit；400- control
Device processed；L1- protects inductance；C1- transformation capacitor；C2- inversion capacitor；L2- inversion inductor；L- zero line；N- zero line side.
Specific embodiment
Below in conjunction with attached drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear
Chu is fully described by, it is clear that and described embodiment is only a part of the embodiment of the utility model, rather than whole
Embodiment.The component of the utility model embodiment being usually described and illustrated herein in the accompanying drawings can be with a variety of different configurations
To arrange and design.Therefore, below the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit
The range of claimed invention processed, but it is merely representative of the selected embodiment of the utility model.It is practical new based on this
The embodiment of type, those skilled in the art's every other embodiment obtained without making creative work,
It fall within the protection scope of the utility model.
In the present invention, term " on ", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outside",
" in ", "vertical", "horizontal", " transverse direction ", the orientation or positional relationship of the instructions such as " longitudinal direction " be orientation based on the figure or
Positional relationship.These terms are not intended to limit indicated primarily to better describe the utility model and embodiment
Device, element or component must have particular orientation, or be constructed and operated with particular orientation.
Also, above-mentioned part term is other than it can be used to indicate that orientation or positional relationship, it is also possible to for indicating it
His meaning, such as term " on " also are likely used for indicating certain relations of dependence or connection relationship in some cases.For ability
For the those of ordinary skill of domain, the concrete meaning of these terms in the present invention can be understood as the case may be.
In addition, term " installation ", " setting ", " being equipped with ", " connection ", " connected " shall be understood in a broad sense.For example, it may be solid
Fixed connection, is detachably connected or monolithic construction；It can be mechanical connection, or point connection；It can make to be connected directly, either
It indirectly connected through an intermediary, or is two connection internal between device, element or component.For this field
For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In addition, term " first ", " second " etc. are mainly used for distinguishing different devices, element or component (specifically
Type and construction may it is identical may also be different), be not intended to show or implies meaning showing device, element or component
Relative importance and quantity.Unless otherwise indicated, the meaning of " multiple " is two or more.
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
It clearly and completely describes, it is clear that described embodiment is only the utility model a part of the embodiment, rather than whole realities
Apply example.Based on the embodiments of the present invention, those of ordinary skill in the art institute without making creative work
The every other embodiment obtained, fall within the protection scope of the utility model.
For the problems of the prior art, the utility model provides a kind of safe potential device and has safe transformation dress
The socket set.The safe potential device includes rectification circuit, transforming circuit, inversion rectification circuit and controller, wherein rectification
Circuit carries out the operation of AC to DC, and transforming circuit carries out the operation of isolation transformation, and inversion rectification circuit carries out direct current change
The operation of exchange.As it can be seen that by direct current and can be handed over using this kind of safe potential device and the socket with safe potential device
The frequent changes of stream complete isolation transformation, to avoid the possibility of electric leakage, and then improve the safe potential device when in use
Safety reduces the probability that peril occurs.It is described below by embodiment.
Embodiment 1
Referring to Fig. 1, being the circuit diagram of safe potential device provided by the embodiment of the utility model.
As shown in Figure 1, safe potential device include rectification circuit 100, transforming circuit 200, inversion rectification circuit 300 and
Controller 400.Wherein, rectification circuit 100 is connected with controller 400, for receiving AC signal and converting AC signal
For direct current signal, and direct current signal is sent to transforming circuit 200, send direct current signal to controller 400.
In the present embodiment, 100 major function of rectification circuit is that AC signal is converted to direct current signal, and main circuit is main
It is made of rectifier diode.In practical applications, which can be half-wave rectifying circuit, full-wave rectifying circuit, bridge
Formula rectification circuit, voltage doubling rectifing circuit etc., this embodiment is not limited.
In the present embodiment, direct current signal is inputted from the input terminal of controller 400, provides electric energy for controller 400.
Transforming circuit 200 is connected with rectification circuit 100 and controller 400 respectively, for the control in controller 400
Under, isolation transformation processing is carried out to direct current signal and obtains variable voltage signal, and sends variable voltage signal to inversion rectification circuit 300.
Inversion rectification circuit 300 is connected with transforming circuit 200 and controller 400 respectively, for the control in controller 400
Under system, variable voltage signal is received, and variable voltage signal is converted into output signal.
In the present embodiment, direct current signal is carried out isolation transformation processing and obtains variable voltage signal by transforming circuit 200, the transformation
Signal is DC signal；Then inversion rectification circuit 300 believes the output that the variable voltage signal of the direct current is converted to exchange again
Number output.
As an alternative embodiment, transforming circuit 200 can be DC/DC converter.The DC/DC converter can
Think step-up DC/DC converter, voltage-dropping type DC/DC converter, buck-boost type DC/DC converter etc., the present embodiment does not limit
It is fixed.
In the above-described embodiment, DC/DC converter is PWM control type DC/DC converter, exports arteries and veins by controller 400
Signal is rushed to be controlled, with it is high-efficient, can use for a long time, small load when, noise small with power consumption it is small and have good
Output voltage ripple the advantages of.
In the present embodiment, according to the difference of DC side energy-storage travelling wave tube form, which can be voltage
Type inverter circuit, current-mode inverter circuit etc., this embodiment is not limited.
In the present embodiment, controller 400 exports three road pulse signals, for controlling rectification circuit 100, transformation electricity respectively
Road 200 and inversion rectification circuit 300.Controller 400 exports the control terminal of the first pulse signal to rectification circuit 100, control
Device 400 exports the control terminal of the second pulse signal to transforming circuit 200, and it is whole to inversion that controller 400 exports third pulse signal
The control terminal of current circuit 300.Wherein, the first pulse signal can be identical two-by-two with the second pulse signal, can also two neither phases
Together, the first pulse signal, the second pulse signal are different between two with third pulse signal respectively.
In the present embodiment, as shown in Figure 1, safety potential device can directly be connect with zero line L and zero line side N,
In, voltage can be 220V between zero line L and zero line side N, and this embodiment is not limited.
Safe potential device described in Fig. 1 can complete isolation transformation by direct current and the frequent changes exchanged, thus
Being directly connected to for circuit is avoided, and then avoids the possibility of electric leakage.Using this kind of safe potential device, the safe transformation can be improved
The safety of device when in use reduces the probability that peril occurs.
Embodiment 2
Referring to Fig. 2, Fig. 2 is the circuit diagram for the safe potential device that the utility model second embodiment provides.Its
In, safe potential device shown in Fig. 2 is that safe potential device as shown in Figure 1 optimizes.
As shown in Fig. 2, rectification circuit 100 includes bridge rectifier 101 and protection inductance L1, bridge rectifier 101
Including exchange end, DC terminal and control terminal.Wherein, protection inductance L1 is connected by exchanging end with bridge rectifier 101；Become
Volt circuit 200 is connected by DC terminal with bridge rectifier 101；Controller 400 and bridge rectifier 101 pass through control
End is connected.
In the present embodiment, which mainly includes rectifier diode.The rectifier diode is a kind of by friendship
Galvanic electricity can be changed into the semiconductor devices of direct current energy.Generally include a PN junction, positive terminal and negative pole end.Its most important spy
Property be exactly unilateral conduction, electric current can only from rectifier diode anode flow into, cathode outflow.
In the present embodiment, which can be plane silicon diode, Schottky barrier diodes etc., this implementation
Example is not construed as limiting.
In the present embodiment, transforming circuit 200 includes transformation capacitor C1, the first ac-dc converter circuit 201, conversion circuit
202 and second ac-dc converter circuit 203.
Wherein, transformation capacitor C1 and the first ac-dc converter circuit 201 are both connected to the direct current of bridge rectifier 101
End.Transformation capacitor C1 is in parallel with the first ac-dc converter circuit 201.
First ac-dc converter circuit 201 is connected with controller 400, under the control of the controller 400 by direct current
Signal is converted to the first adjustment signal.
In the present embodiment, the first ac-dc converter circuit 201 is mainly made of metal-oxide-semiconductor and diode.Wherein, metal-oxide-semiconductor is
A kind of metal (metal)-oxide (oxide)-semiconductor (semiconductor) field effect transistor, it is main to play switch
Effect；Diode is Schottky diode.
Conversion circuit 202 is connected with the first ac-dc converter circuit 201 and the second ac-dc converter circuit 203 respectively,
Isolation transformation conversion is carried out for receiving the first adjustment signal, and to the first adjustment signal, obtains second adjustment signal.
Second ac-dc converter circuit 203 is connected with controller 400, under the control of the controller 400 by second
Adjustment signal is converted to variable voltage signal.
In the present embodiment, transformation capacitor C1 and inversion capacitor C2 all can be CBB electric capacities (such as WIMA capacitor), mica
Capacitor (such as phlogopite capacitor, silver-mica capacitor), monolithic capacitor etc., this embodiment is not limited.
As an alternative embodiment, the first ac-dc converter circuit 201 is full bridge inverter, for controlling
Under the control of device 400, direct current signal is converted into the first adjustment signal.
In the present embodiment, conversion circuit 202 carries out high-frequency ac transformation to the first adjustment signal, obtains second adjustment letter
Number.
In the present embodiment, which is mainly used for changing the voltage of the first adjustment signal.In practical applications,
The conversion circuit 202 can be transformer.Specifically, the transformer can be core type transformer (inserted sheet iron core, c-type iron core, iron
Oxysome iron core), shell type transformer (inserted sheet iron core, c-type iron core, ferrite iron core), ring-shaped transformer, wafer transformer etc.,
This embodiment is not limited.
In the present embodiment, inversion rectification circuit 300 includes inversion capacitor C2, inversion conversion circuit 301 and inversion inductor
L2.Wherein, inversion capacitor C2 is connected with the second ac-dc converter circuit 203；Also, inversion capacitor C2 and inversion conversion circuit
301 is in parallel.
Inversion conversion circuit 301 is connected with controller 400, for receiving variable voltage signal under the control of the controller 400,
And variable voltage signal is converted as output signal；Inversion inductor L2 is connected with inversion conversion circuit 301, is used for output signal output.
As an alternative embodiment, controller 400 is EG8010 integrated chip, EG8010 integrated chip is used for
By the control to pulse signal, the control to transforming circuit 200 and inversion rectification circuit 300 is realized.
In the present embodiment, pulse signal is PWM high-frequency pulse signal.As shown in Fig. 2, controller 400 can export three tunnels
Pulse signal, i.e. PWM1, PWM2 and PWM3.Wherein, controller 400 exports PWM1 to the control terminal of rectification circuit 100, is used for
Control rectification circuit 100；Controller 400 exports the control terminal of PWM2 to transforming circuit 200, for controlling transforming circuit 200；
Controller 400 exports the control terminal of PWM3 to inversion rectification circuit 300, for controlling inversion rectification circuit 300.
In the present embodiment, PWM1 and PWM2 can identical (such as duty ratio is mutually same), can not also be identical, PWM1, PWM2
(such as duty ratio is not mutually same) not identical as PWM3 respectively.
In the present embodiment, as shown in Fig. 2, each pulse signal includes two seed pulse signals, controller 400 is exported every
A pulse signal, includes two pulse signals line, and every road pulse signal-line transmits a seed pulse signal respectively.Wherein,
PWM1 includes PWM11 and PWM12, and PWM2 includes PWM21 and PWM22, and PWM3 includes PWM31 and PWM32.In actual use,
The two seed pulses signal can be distinguished by the difference of duty ratio, for example, when one of pulse signal subpulse signal
When for high level, then another seed pulse signal in the pulse signal is low level.
As it can be seen that implement safe potential device described in the present embodiment, it can be complete by direct current and the frequent changes exchanged
At isolation transformation, to avoid the possibility of electric leakage, and then the safety of safe potential device when in use is improved, reduced dangerous
The probability that accident occurs.
In addition, the utility model also provides a kind of socket with safe potential device, including any of the above-described embodiment institute
The safe potential device and socket circuit stated.
Wherein, socket circuit is used for after the socket powers on, and controls the power on/off of receptacle sockets.
It should be understood that " in the present embodiment ", " in the present embodiment " or " optional as one kind that specification is mentioned in the whole text
Embodiment " means that a particular feature, structure, or characteristic related with embodiment includes at least one reality in the utility model
It applies in example.Therefore, " in the present embodiment ", " in the present embodiment " or " optional as one kind occurred everywhere in the whole instruction
Embodiment " not necessarily refer to identical embodiment.In addition, these a particular feature, structure, or characteristics can be to be arbitrarily suitble to
Mode combine in one or more embodiments.Those skilled in the art should also know that implementation described in this description
Example belongs to alternative embodiment, and related movement, structure and module are not necessarily required by the utility model.
In the various embodiments of the utility model, it should be appreciated that magnitude of the sequence numbers of the above procedures are not meant to hold
Successively, the execution sequence of each process should be determined by its function and internal logic the certainty of row sequence, without coping with the utility model
The implementation process of embodiment constitutes any restriction.
More than, only specific embodiment of the present utility model, but protection scope of the utility model is not limited thereto,
Anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation or replace
It changes, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be with claim
Subject to protection scope.
Claims (10)
1. a kind of safe potential device, which is characterized in that the safe potential device includes rectification circuit, transforming circuit, inversion
Rectification circuit and controller, wherein
The rectification circuit is connected with the controller, for receiving AC signal and the AC signal being converted to direct current
Signal, and the direct current signal is sent to the transforming circuit, the direct current signal is sent to the controller；
The transforming circuit is connected with the rectification circuit and the controller respectively, for the control in the controller
Under, isolation transformation processing is carried out to the direct current signal and obtains variable voltage signal, and sends the variable voltage signal to the inversion
Rectification circuit；
The inversion rectification circuit is connected with the transforming circuit and the controller respectively, for the control in the controller
Under system, the variable voltage signal is received, and the variable voltage signal is converted into output signal.
2. safe potential device according to claim 1, which is characterized in that the rectification circuit includes bridge rectifier
With protection inductance, the bridge rectifier includes exchange end, DC terminal and control terminal, wherein
The protection inductance is connected by the exchange end with the bridge rectifier；
The transforming circuit is connected by the DC terminal with the bridge rectifier；
The controller is connected with the bridge rectifier by the control terminal.
3. safe potential device according to claim 2, which is characterized in that the transforming circuit includes transformation capacitor,
One ac-dc converter circuit, conversion circuit and the second ac-dc converter circuit, wherein
The transformation capacitor and first ac-dc converter circuit are both connected to the DC terminal of the bridge rectifier,
Wherein, the transformation capacitor is in parallel with first ac-dc converter circuit；
First ac-dc converter circuit is connected with the controller, for described in the conversion under the control of the controller
Direct current signal is the first adjustment signal；
The conversion circuit is connected with first ac-dc converter circuit and second ac-dc converter circuit respectively, uses
Isolation transformation conversion is carried out in the reception the first adjustment signal, and to the first adjustment signal, obtains second adjustment signal；
Second ac-dc converter circuit is connected with the controller, for described in the conversion under the control of the controller
Second adjustment signal is variable voltage signal.
4. safe potential device according to claim 3, which is characterized in that first ac-dc converter circuit is full-bridge
Inverter circuit, under the control of the controller, converting the direct current signal as the first adjustment signal.
5. safe potential device according to claim 3, which is characterized in that the conversion circuit believes the first adjustment
Number carry out high-frequency ac transformation, obtain the second adjustment signal.
6. safe potential device according to claim 3, which is characterized in that the inversion rectification circuit includes inversion electricity
Appearance, inversion conversion circuit and inversion inductor, wherein
The inversion capacitor is connected with second ac-dc converter circuit；Wherein, the inversion capacitor and the inversion turn
Change circuit in parallel；
The inversion conversion circuit is connected with the controller, for receiving the transformation letter under the control of the controller
Number, and the variable voltage signal is converted as output signal；
The inversion inductor is connected with the inversion conversion circuit, for exporting the output signal.
7. safe potential device according to claim 1, which is characterized in that the controller is EG8010 integrated chip,
The EG8010 integrated chip is used to realize by the control to pulse signal to the transforming circuit and the inversion rectified current
The control on road.
8. safe potential device according to claim 7, which is characterized in that the pulse signal is high-frequency pulse signal.
9. safe potential device according to claim 7, which is characterized in that the pulse signal, which includes two kinds, has difference
The subpulse signal of level.
10. a kind of socket with safe potential device, which is characterized in that including safety according to any one of claims 1 to 9
Potential device and socket circuit, wherein socket circuit is used for after the socket powers on, and controls the on-off of receptacle sockets
Electricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821161939.6U CN208890661U (en) | 2018-07-20 | 2018-07-20 | A kind of safe potential device and the socket with safe potential device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821161939.6U CN208890661U (en) | 2018-07-20 | 2018-07-20 | A kind of safe potential device and the socket with safe potential device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208890661U true CN208890661U (en) | 2019-05-21 |
Family
ID=66507220
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821161939.6U Expired - Fee Related CN208890661U (en) | 2018-07-20 | 2018-07-20 | A kind of safe potential device and the socket with safe potential device |
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| Country | Link |
|---|---|
| CN (1) | CN208890661U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108736738A (en) * | 2018-07-20 | 2018-11-02 | 何龙 | A kind of safe potential device |
-
2018
- 2018-07-20 CN CN201821161939.6U patent/CN208890661U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108736738A (en) * | 2018-07-20 | 2018-11-02 | 何龙 | A kind of safe potential device |
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Granted publication date: 20190521 Termination date: 20200720 |