CN207715420U - A kind of exhaust fan Intellectual delay switch - Google Patents
A kind of exhaust fan Intellectual delay switch Download PDFInfo
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- CN207715420U CN207715420U CN201721452787.0U CN201721452787U CN207715420U CN 207715420 U CN207715420 U CN 207715420U CN 201721452787 U CN201721452787 U CN 201721452787U CN 207715420 U CN207715420 U CN 207715420U
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Abstract
The utility model is related to a kind of exhaust fan Intellectual delay switchs, including：Full-bridge rectification module BR1, power switch delay circuit, thyristor Q3 and exhaust fan MG1, wherein after exhaust fan and the BR1 series connection of full-bridge rectification module, external 220V alternating currents；The direct-flow positive pole output end of full-bridge rectification module BR1 is connected with the anode of thyristor Q3, power switch delay circuit is connected with the control pole of thyristor Q3, cathode for controlling thyristor Q3 is connected to and disconnects with the direct current cathode output end of full-bridge rectification module BR1, realizes the OnNow to exhaust fan MG1, stops and be delayed to stop immediately.The technical solution of the utility model, by switch S1 in the prior art from 2 transposings of A, B to 2 points of C, D, A, 2 points of B and exhaust fan are directly accessed alternating current after connecting and regardless of fiery zero curves, on the basis of not changing existing switch S1 appearances and installation site, this exhaust fan Intellectual delay switch provided by the utility model can be disposed, it is easy to operate, deployment is convenient, user experience is high.
Description
Technical field
The utility model is related to delay switch equipment technical fields, and in particular to a kind of exhaust fan Intellectual delay switch.
Background technology
There are problems with for the exhaust fan work of lavatory：
If 1, be typically delayed 5 minutes with touch or delay switch by system, on the upside of somebody time meeting
It is long, there are no out when, fan delay time is arrived, i.e., someone will not walk also, the problem of exhaust fan is just automatically closed.
If 2, using human induction switch, that is as long as someone, into lavatory, exhaust fan can all turn, enter sometimes be
Hand is washed, exhaust fan can also turn, and cause the waste of electric power.
If 3, gone up sometimes still very smelly after lavatory comes out, it has not been convenient to close exhaust fan at once with common switch.But
It is that if not out smoothly turning off, and meeting causes the waste of electricity it is easy to forget that powered-down.
Delay switch on the market now, whether the delay switch of any triggering mode, all only accomplishes simply to prolong
Shi Gongneng, and also always in power consumption when not working, do not accomplish really energy saving.This one kind switch is suitable only for street lamp or corridor
Lamp uses, and is used without a dedicated exhaust fan of lavatory that is suitable for.
If 4, original already installed circuit will make inductive switch into, it may appear that installation site is improper, or switch
Appearance and original decoration style the problems such as being unworthy of.
Utility model content
In view of this, the purpose of the utility model is to overcome the deficiencies in the prior art, a kind of exhaust fan is provided and is intelligently prolonged
Shi Kaiguan realizes the OnNow of exhaust fan on the basis of simplifying circuit structure, stops and be delayed to stop immediately.
In order to achieve the above object, the utility model adopts the following technical solution：
A kind of exhaust fan Intellectual delay switch, including：Full-bridge rectification module BR1, power switch delay circuit, thyristor Q3
With exhaust fan MG1, wherein
After the exhaust fan and the BR1 series connection of full-bridge rectification module, external 220V alternating currents；The full-bridge rectification module BR1's
Direct-flow positive pole output end is connected with the anode of thyristor Q3, the control pole phase of the power switch delay circuit and thyristor Q3
Even, the cathode for controlling the thyristor Q3 is connected to and disconnects with the direct current cathode output end of full-bridge rectification module BR1, from
And it realizes the OnNow to exhaust fan MG1, stop and be delayed to stop immediately.
Preferably, the power switch delay circuit includes：Processor U1, triode Q1, Q2, zener diode D1, D2,
Diode D3, D4, D5, resistance R1, R2, R3, R4, R6, R7, R9, wherein
The emitter of triode Q1 is connected with the direct-flow positive pole output end of full-bridge rectification module BR1, the base stage of triode Q1
Be connected with the collector of triode Q2 by resistance R3, meanwhile, base stage by with the concatenated diode D5 just connect of resistance R3,
Switch S1 ground connection；The collector of triode Q1 is grounded by resistance R2 and with the concatenated zener diode D1 of resistance R2, is led to simultaneously
It crosses and is connected with the concatenated resistance R1 of resistance R2 with the first pin of processor U1, be processor U1 power supplies；The control of thyristor Q3
Pole is connected by concatenated resistance R7 and zener diode D2 with the collector of triode Q1；
The second pin of processor U1 passes through concatenated resistance R9, the diode D3 just connect, switch S1 ground connection；Processor U1
Third pin be connected with the base stage of triode Q2 by the concatenated diode D4 just connect, resistance R6；The transmitting of triode Q2
Pole is grounded, and collector is connected by resistance R4 with the direct-flow positive pole output end of full-bridge rectification module BR1, meanwhile, collector and two
The anode of pole pipe D5 is connected；
Wherein, the switch S1 is the switch of installation and deployment in the prior art.
Preferably, the power switch delay circuit further includes：The anode of polar capacitor C3, the polar capacitor C3 are even
It is connected between resistance R1 and resistance R2, cathode ground connection；The polar capacitor C3 be used for for input processor U1 operating voltage into
Row filtering.
Preferably, the power switch delay circuit further includes：Filter capacitor C1, one end of filter capacitor C1 and processor
The first pin of U1 is connected, other end ground connection.
Preferably, the power switch delay circuit further includes：Filter capacitor C2, one end of filter capacitor C2 and processor
The second pin of U1 is connected, other end ground connection.
Preferably, the power switch delay circuit further includes：One end of capacitance C4, the capacitance C4 are with thyristor Q3's
Anode connects, other end ground connection.
Preferably, the power switch delay circuit further includes：Resistance R8, the resistance R8 connect with capacitance C4, connect
Circuit on one side afterwards connects with the anode of thyristor Q3, other end ground connection.
Preferably, the power switch delay circuit further includes：The diode D6 of reversal connection, diode D6 and the electricity of reversal connection
R8, capacitance C4 series connection are hindered, the circuit on one side after series connection connects with the anode of thyristor Q3, other end ground connection.
Preferably, the triode Q1 is PNP type triode, and the triode Q2 is NPN type triode.
Preferably, the model of the processor U1:The SN8P2511B of Song Han companies.
The utility model uses above technical scheme, at least has following advantageous effect：
This power switch delay circuit provided by the utility model, provides four kinds of operating modes：1, switch S1 is failure to actuate
When, no power；2, when switch S1 is closed, OnNow；3, when switch is closed, delay stops；4, it switch S1 maloperations or is not required to
When delay, stop immediately.Wherein, the 1st kind of operating mode, compared with prior art in induction type delay switch, this reality
With this delay switch of novel offer, not power consumption when not working can be truly realized power and energy saving.2nd kind of operating mode, row
After gas fans OnNow, exhaust fan can be made to work always for a long time, suitable long-time is gone to toilet or super bath is combined into exhaust fan
Integrated situation uses.3rd kind of operating mode, is suitble to after go up lavatory that peculiar smell is very heavy, needs to continue the people of pumping air for a period of time
It uses.4th kind of operating mode when suitable user accidentally touches switch S1 or when coming out free from extraneous odour afterwards, needs to cancel delay function, make
Exhaust fan uses stop operating at once in the case of.
It can be seen from the above, this power switch delay circuit provided by the utility model, has provided different rows to the user
Gas fans operating mode selection, user experience higher.In addition, all delay switch are put using the operation of standard on the market
Big device or time base circuit go to use as timer, and since component is more, circuit design welding is complicated, and the electricity of the utility model
Source switch delay circuit uses processor, the circuit elements such as amplifier, timer to be all integrated in inside processor, can simplify power supply
The circuit structure of switch delay circuit reduces production cost, and later maintenance management is more convenient, and fault location is faster.
In addition, technical solution provided by the utility model, by switch S1 in the prior art from 2 transposings of A, B to C, D
It 2 points, is directly accessed alternating current after A, B series connection exhaust fans at 2 points and regardless of fiery zero curve, is not changing existing switch S1 appearances and peace
On the basis of holding position, installation this exhaust fan Intellectual delay switch provided by the utility model, easy to operate, portion can be disposed
It is convenient to affix one's name to, and user experience is high.
And technical solution provided by the utility model, since 2 points of A, B do not install switch, and full-bridge rectification module BR1
It when incoming transport electricity, does not differentiate between positive and negative, so when A, B access alternating current, which point access of 2 points of A, B is needed not distinguish between at 2 points
Firewire, which point access zero curve, may be implemented it is blind connect, it is time saving and energy saving, user experience can be further increased.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other drawings may also be obtained based on these drawings.
Fig. 1 is a kind of schematic block diagram for exhaust fan Intellectual delay switch that one embodiment of the utility model provides；
Fig. 2 is a kind of circuit diagram for exhaust fan Intellectual delay switch that one embodiment of the utility model provides.
Specific implementation mode
It, below will be to the technology of the utility model to keep the purpose of this utility model, technical solution and advantage clearer
Scheme is described in detail.Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not before making creative work
Obtained all other embodiment is put, the range that the utility model is protected is belonged to.
Below by drawings and examples, the technical solution of the utility model is described in further detail.
Referring to Fig. 1, a kind of exhaust fan Intellectual delay switch that one embodiment of the utility model provides, including：Full-bridge rectification
Module BR1, power switch delay circuit, thyristor Q3 and exhaust fan MG1, wherein
After the exhaust fan and the BR1 series connection of full-bridge rectification module, external 220V alternating currents；The full-bridge rectification module BR1's
Direct-flow positive pole output end is connected with the anode of thyristor Q3, the control pole phase of the power switch delay circuit and thyristor Q3
Even, the cathode for controlling the thyristor Q3 is connected to and disconnects with the direct current cathode output end of full-bridge rectification module BR1, from
And it realizes the OnNow to exhaust fan MG1, stop and be delayed to stop immediately.
Referring to Fig. 2, it is preferable that the power switch delay circuit includes：Processor U1, triode Q1, Q2, voltage stabilizing two
Pole pipe D1, D2, diode D3, D4, D5, resistance R1, R2, R3, R4, R6, R7, R9, wherein
The emitter of triode Q1 is connected with the direct-flow positive pole output end of full-bridge rectification module BR1, the base stage of triode Q1
Be connected with the collector of triode Q2 by resistance R3, meanwhile, base stage by with the concatenated diode D5 just connect of resistance R3,
Switch S1 ground connection；The collector of triode Q1 is grounded by resistance R2 and with the concatenated zener diode D1 of resistance R2, is led to simultaneously
It crosses and is connected with the concatenated resistance R1 of resistance R2 with the first pin of processor U1, be processor U1 power supplies；The control of thyristor Q3
Pole is connected by concatenated resistance R7 and zener diode D2 with the collector of triode Q1；
The second pin of processor U1 passes through concatenated resistance R9, the diode D3 just connect, switch S1 ground connection；Processor U1
Third pin be connected with the base stage of triode Q2 by the concatenated diode D4 just connect, resistance R6；The transmitting of triode Q2
Pole is grounded, and collector is connected by resistance R4 with the direct-flow positive pole output end of full-bridge rectification module BR1, meanwhile, collector and two
The anode of pole pipe D5 is connected；
Wherein, the switch S1 is the switch of installation and deployment in the prior art.
Preferably, the power switch delay circuit further includes：The anode of polar capacitor C3, the polar capacitor C3 are even
It is connected between resistance R1 and resistance R2, cathode ground connection；The polar capacitor C3 be used for for input processor U1 operating voltage into
Row filtering.
As shown from the above technical solution, this power switch delay circuit provided by the utility model provides four kinds of work
Pattern：1, when switch S1 is failure to actuate, no power；2, when switch S1 is closed, OnNow；3, when switch is closed, delay stops；
4, when switch S1 maloperations or when need not being delayed, stop immediately.Wherein, the 1st kind of operating mode, compared with prior art in
The delay switch of induction type, this delay switch provided by the utility model, not power consumption when not working can be truly realized power saving
It is energy saving.2nd kind of operating mode after exhaust fan OnNow, can make exhaust fan work always for a long time, be suitble to upper lavatory for a long time
Institute or super bath and exhaust fan are integrated situation use.3rd kind of operating mode, be suitble to gone up lavatory after peculiar smell it is very heavy, need after
It is continuous to take out the people's use of air for a period of time.Free from extraneous odour after when 4th kind of operating mode, suitable user accidentally touch switch S1 or out
When, it needs to cancel delay function, be used so that exhaust fan is stopped operating at once in the case of.
It can be seen from the above, this power switch delay circuit provided by the utility model, has provided different rows to the user
Gas fans operating mode selection, user experience higher.In addition, all delay switch are put using the operation of standard on the market
Big device or time base circuit go to use as timer, and since component is more, circuit design welding is complicated, and the electricity of the utility model
Source switch delay circuit uses processor, the circuit elements such as amplifier, timer to be all integrated in inside processor, can simplify power supply
The circuit structure of switch delay circuit reduces production cost, and later maintenance management is more convenient, and fault location is faster.
In addition, technical solution provided by the utility model, by switch S1 in the prior art from 2 transposings of A, B to C, D
It 2 points, is directly accessed alternating current after A, B series connection exhaust fans at 2 points and regardless of fiery zero curve, is not changing existing switch S1 appearances and peace
On the basis of holding position, installation this exhaust fan Intellectual delay switch provided by the utility model, easy to operate, portion can be disposed
It is convenient to affix one's name to, and user experience is high.
It is understood that technical solution provided by the utility model, switch is not installed at 2 points due to A, B, and full-bridge is whole
It when flow module BR1 incoming transport electricity, does not differentiate between positive and negative, so when A, B access alternating current, needs not distinguish between 2 points of A, B at 2 points
Which point access firewire, which point access zero curve, may be implemented it is blind connect, it is time saving and energy saving, user experience can be further increased.
Four kinds of operating modes of this power switch delay circuit provided by the utility model in order to better understand, now have
Body is described below：
1, when switch S1 is not operating, since triode Q1, Q2 are not turned on, processor U1 does not have operating voltage, thyristor
Also without trigger current, exhaust fan MG1 is not rotated Q3, entire circuit not power consumption.The delay of middle induction type is opened compared with prior art
It closes, this delay switch provided by the utility model, not power consumption when not working can be truly realized power and energy saving.
2, when switch S1 is closed, the diode D5 conductings just connect, triode Q1 passes through resistance R3, the diode D5 just connect
Base current over the ground is formed with switch S1, Q1 enters saturation state；The collector of triode Q1 passes through resistance R2 current limlitings, steady
After pressing diode D1 voltage stabilizings, the operating voltage of 6V is provided for processor U1 by resistance R1；As triode Q1 collector potentials ＞
When 20V, zener diode D2 reverse breakdowns export trigger current by resistance R7 to thyristor Q3, and thyristor Q3 conductings are brilliant
The cathode of brake tube Q3 is connected to the direct current cathode output end of full-bridge rectification module BR1, and exhaust fan MG1 is powered and starts to rotate (this
When, No. 1 pin and No. 3 pins of the full-bridge rectification module BR1 in Fig. 2 are equivalent to connection), to realize opening immediately for exhaust fan
It is dynamic.
It starts to work since processor U1 is powered on, the second pin of processor U1 passes through concatenated R9, D3 and switch S1
A negative trigger over the ground is generated, the third pin of processor U1 exports high level, which passes through concatenated D4, R6
Base current is provided for Q2, Q2 is made to enter saturation state, to provide access for the base current of Q1；Meanwhile as processor U1
Second pin current potential be less than 2/3 1 pin voltage when, processor U1 works always, but not-time, at this time exhaust fan MG1 mono-
Straight work.
It follows that this delay switch provided by the utility model, after exhaust fan OnNow, exhaust fan can be made long
Time works always, situation use that suitable long-time is gone to toilet or super bath and exhaust fan are integrated.
3, when switch S1 is disconnected, the pull-up resistor inside processor U1 is powered for second pin, and the second of processor U1
Pin current potential be higher than 2/3 1 pin voltage when, processor U1 starts countdown, and triode Q1 continues to be connected, be processor U1 after
It is continuous that operating voltage is provided, and trigger current is exported to thyristor Q3, make thyristor Q3 continue to be connected, exhaust fan MG1 is rotated further；
After reaching preset time (such as 5 minutes), processor U1 third pins export low level, and triode Q2, which enters, to be cut
Only state, and then Q1 ends, processor U1 loses the job voltage, while thyristor Q3 cut-offs, exhaust fan MG1 stop operating, from
And it realizes the delay of exhaust fan and stops.
It follows that this delay switch provided by the utility model, it is suitble to after having gone up lavatory that peculiar smell is very heavy, needs to continue
The people of air for a period of time is taken out to use.
4, as switch S1 in preset time (such as in 20 seconds), when receiving the signal of on and off twice, processor U1
Third pin output low level, triode Q2 and Q1 can end work at once at once, and thyristor Q3 is also switched off work, exhaust fan
MG1 stops operating immediately.
It follows that this delay switch provided by the utility model, when suitable user accidentally touches switch S1, (such as：Have
People gone up lavatory come out it is not smelly, or it is original intend to turn on light, the switch of exhaust fan has accidentally been pushed the wrong, because very
The switch of more families can not remember always what switch which is there is no mark well), it at this moment just needs to close at once
It closes.At this point, user only needs after accidentally opening exhaust fan, closing is opened once again, is turned off, you can is cancelled delay function, is made row
Gas fan stops operating at once.
Preferably, the power switch delay circuit further includes：Filter capacitor C1, one end of filter capacitor C1 and processor
The first pin of U1 is connected, other end ground connection.
Preferably, the power switch delay circuit further includes：Filter capacitor C2, one end of filter capacitor C2 and processor
The second pin of U1 is connected, other end ground connection.
Preferably, the power switch delay circuit further includes：One end of capacitance C4, the capacitance C4 are with thyristor Q3's
Anode connects, other end ground connection.
Preferably, the power switch delay circuit further includes：Resistance R8, the resistance R8 connect with capacitance C4, connect
Circuit on one side afterwards connects with the anode of thyristor Q3, other end ground connection.
Preferably, the power switch delay circuit further includes：The diode D6 of reversal connection, diode D6 and the electricity of reversal connection
R8, capacitance C4 series connection are hindered, the circuit on one side after series connection connects with the anode of thyristor Q3, other end ground connection.
It is understood that being connected in parallel on cathode and the anode both ends of thyristor Q3, Ke Yiyou after resistance R8, capacitance C4 series connection
The excessive damage caused to thyristor Q3 of voltage build-up rate at the cathode anode both ends of effect ground limitation thyristor Q3, plays buffering and makees
With.Diode D6 connects two ground wires, and effectively high-pressure section and low-pressure section can be kept apart, ensure that electricity
The trouble free service of source switch delay circuit.
Preferably, the triode Q1 is PNP type triode, and the triode Q2 is NPN type triode.
Preferably, the model of the processor U1:The SN8P2511B of Song Han companies.
Above description is only a specific implementation of the present invention, but the scope of protection of the utility model is not limited to
In this, any one skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation
Or replace, it should be covered within the scope of the utility model.Therefore, the scope of protection of the utility model should be with the power
Subject to the protection domain that profit requires.Term " first ", " second " are used for description purposes only, and are not understood to indicate or imply phase
To importance.Term " multiple " refers to two or more, unless otherwise restricted clearly.
Claims (10)
1. a kind of exhaust fan Intellectual delay switch, which is characterized in that including：Full-bridge rectification module BR1, power switch delay electricity
Road, thyristor Q3 and exhaust fan MG1, wherein
After the exhaust fan and the BR1 series connection of full-bridge rectification module, external 220V alternating currents；The direct current of the full-bridge rectification module BR1
Cathode output end is connected with the anode of thyristor Q3, and the power switch delay circuit is connected with the control pole of thyristor Q3, uses
It is connected to and disconnects with the direct current cathode output end of full-bridge rectification module BR1 in the cathode for controlling the thyristor Q3, to realize
The OnNow of exhaust fan MG1, immediately stopping and delay are stopped.
2. exhaust fan Intellectual delay switch according to claim 1, which is characterized in that the power switch delay circuit packet
It includes：Processor U1, triode Q1, Q2, zener diode D1, D2, diode D3, D4, D5, resistance R1, R2, R3, R4, R6, R7,
R9, wherein
The emitter of triode Q1 is connected with the direct-flow positive pole output end of full-bridge rectification module BR1, and the base stage of triode Q1 passes through
Resistance R3 is connected with the collector of triode Q2, meanwhile, base stage by with the concatenated diode D5 just connect of resistance R3, switch S1
Ground connection；The collector of triode Q1 is grounded by resistance R2 and with the concatenated zener diode D1 of resistance R2, at the same by with electricity
The resistance concatenated resistance R1 of R2 are connected with the first pin of processor U1, are processor U1 power supplies；The control pole of thyristor Q3 passes through
Concatenated resistance R7 and zener diode D2 are connected with the collector of triode Q1；
The second pin of processor U1 passes through concatenated resistance R9, the diode D3 just connect, switch S1 ground connection；The of processor U1
Three pins are connected by the concatenated diode D4 just connect, resistance R6 with the base stage of triode Q2；The emitter of triode Q2 connects
Ground, collector are connected by resistance R4 with the direct-flow positive pole output end of full-bridge rectification module BR1, meanwhile, collector and diode
The anode of D5 is connected；
Wherein, the switch S1 is the switch of installation and deployment in the prior art.
3. exhaust fan Intellectual delay switch according to claim 2, which is characterized in that the power switch delay circuit is also
Including：Polar capacitor C3, the anode of the polar capacitor C3 are connected between resistance R1 and resistance R2, cathode ground connection；The pole
Property capacitance C3 be used to be filtered for the operating voltage of input processor U1.
4. exhaust fan Intellectual delay switch according to claim 3, which is characterized in that the power switch delay circuit is also
Including：One end of filter capacitor C1, filter capacitor C1 are connected with the first pin of processor U1, other end ground connection.
5. exhaust fan Intellectual delay switch according to claim 4, which is characterized in that the power switch delay circuit is also
Including：One end of filter capacitor C2, filter capacitor C2 are connected with the second pin of processor U1, other end ground connection.
6. exhaust fan Intellectual delay switch according to claim 5, which is characterized in that the power switch delay circuit is also
Including：Capacitance C4, one end of the capacitance C4 connect with the anode of thyristor Q3, other end ground connection.
7. exhaust fan Intellectual delay switch according to claim 6, which is characterized in that the power switch delay circuit is also
Including：Resistance R8, the resistance R8 connect with capacitance C4, and the circuit on one side after series connection connects with the anode of thyristor Q3, another
End ground connection.
8. exhaust fan Intellectual delay switch according to claim 7, which is characterized in that the power switch delay circuit is also
Including：The diode D6 of reversal connection, diode D6 and resistance R8, the capacitance C4 of reversal connection connect, the circuit on one side after series connection and brilliant lock
The anode of pipe Q3 connects, other end ground connection.
9. exhaust fan Intellectual delay switch according to claim 2, which is characterized in that the triode Q1 is positive-negative-positive three
Pole pipe, the triode Q2 are NPN type triode.
10. exhaust fan Intellectual delay switch according to claim 2, which is characterized in that the model of the processor U1:
The SN8P2511B of Song Han companies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721452787.0U CN207715420U (en) | 2017-11-02 | 2017-11-02 | A kind of exhaust fan Intellectual delay switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721452787.0U CN207715420U (en) | 2017-11-02 | 2017-11-02 | A kind of exhaust fan Intellectual delay switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207715420U true CN207715420U (en) | 2018-08-10 |
Family
ID=63061004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721452787.0U Active CN207715420U (en) | 2017-11-02 | 2017-11-02 | A kind of exhaust fan Intellectual delay switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207715420U (en) |
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2017
- 2017-11-02 CN CN201721452787.0U patent/CN207715420U/en active Active
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