CN205810732U - A kind of cut-offing protecting switch - Google Patents
A kind of cut-offing protecting switch Download PDFInfo
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- CN205810732U CN205810732U CN201620619610.4U CN201620619610U CN205810732U CN 205810732 U CN205810732 U CN 205810732U CN 201620619610 U CN201620619610 U CN 201620619610U CN 205810732 U CN205810732 U CN 205810732U
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Abstract
This utility model relates to a kind of cut-offing protecting switch, and it includes housing, power-off protecting circuit plate, switching circuit board, motion bar, active conductive shell fragment, alternating current outfan and load input terminal；Described motion bar is vertically arranged; motion bar bottom is connected housing with by the first spring; motion bar and the first spring top are fixed; first spring bottom end is fixed with housing; motion bar side is provided with limited block; opposite side is provided with active contacting plate, and switching circuit board is located at the side corresponding with active contacting plate, and switching circuit board top electrically connects with power-off protecting circuit plate；The beneficial effects of the utility model are: constituted master switch by the first contact and the second contact; active contacting plate constitutes auxiliary switch with switching circuit board; master switch and auxiliary switch closure or openness simultaneously under motion bar effect; match with power-off protecting circuit again, it is achieved that reliable and stable power-off protection function.
Description
Technical field
This utility model relates to a kind of circuit protection device, particularly relates to a kind of cut-offing protecting switch.
Background technology
Motor is caused when motor or other electrical equipment operation process occur plug from falling, grid power blackout or other reasons
In the case of power-off dead electricity, operator are likely to be due to a variety of causes and close motor switch the most in time, treat that electrical network recovers suddenly to send
Electricity, motor is electricly unexpected, and motor will operate voluntarily.In the case of operator do not predict, running suddenly of motor will
The harm person and property safety.Meanwhile, the instantaneous peak current that motor restores electricity is very big, and equipment can cause certain damage
Evil, especially during fault, equipment will be caused enormous impact by intermittent energising power-off frequently, and equipment causes serious danger
Evil.
In order to avoid above-mentioned potential safety hazard, market occurs in that some power-off protectors, Publication No. CN102227082A
Chinese utility model patent discloses a kind of power-off protector, it include electromagnetic relay, capacitor, diode, electrical equipment,
Removable switch, press button, insulator and armature, electromagnetic relay is connected on circuit with armature, insulator and electrical equipment
In, capacitor, diode use parallel connection.Technological deficiency of the present utility model is: the period of (1) protection device and electrical equipment
Series connection, properly functioning to electrical equipment interferes；(2) have employed multiple switches such as relay, press button, moving switch
Device, mechanical switch response time is long, and circuit reliability is poor, cannot provide effectively protection in the case of fast break is energized；
(3) situation of user's actively power-off and non-powered line fault power-off can make erroneous judgement, makes troubles to user operation.
Chinese patent CN 104538216 A discloses the press button of a kind of band power-off protection, including press button originally
Body, this internal power failure protection module that is integrated with of described press button, biphase power transmission line is each connected to switch contact and
Power failure protection module, described power failure protection module is in parallel with described switch contact by signal spring；Described signal spring detects
By input and the contrast of output voltage of monitoring switch contact, it may be judged whether have voltage to pass through described switch contact, and send
Signal is to described power failure protection module, if described power failure protection module receives voltage and passes through the signal of described switch contact,
The most described power failure protection module keeps voltage conveying；If described power failure protection module receive do not have voltage pass through described switch touch
The signal of head, the most described power failure protection module cuts off voltage conveying.
Chinese patent CN103531377A discloses the switch of a kind of band power-off protection, including housing；Button assembly；And
Least one set is used for the coil static contact of closing coil assembly, coil moving contact, with least one set for connecting load circuit
Main static contact, actively contact；Coil moving contact, actively contact are fixedly installed on action contact frame, and coil moving contact is elastic unit
Part；Distance between coil moving contact and coil static contact is less than the distance between active contact and main static contact；At action contact frame
On be also fixed with armature, one end away from described contact assembly contact of armature is articulated with on coil block, and its other end exists
Under the driving of button assembly, realization moves up and down, and armature is provided with the armature resetting means driving armature to reset, in hull outside
It is provided with the locking device for button assembly being locked in centre position.
Utility model content
For the deficiency overcoming prior art to exist, this utility model provides a kind of power-off protection stable and reliable in work
Switch.
A kind of cut-offing protecting switch, it includes housing, power-off protecting circuit plate, switching circuit board, motion bar, active conductive
Shell fragment, alternating current outfan and load input terminal；
Described motion bar is vertically arranged, and motion bar bottom is connected housing, motion bar and the first bullet with by the first spring
Spring top is fixed, and the first spring bottom end is fixed with housing, and motion bar side is provided with limited block, and opposite side is provided with active contacting plate,
Switching circuit board is located at the side corresponding with active contacting plate, and switching circuit board top electrically connects with power-off protecting circuit plate；
Described alternating current outfan includes the first binding post and the second binding post, and described load input terminal includes
First pin and the second pin；
Described active conductive shell fragment anterior-posterior horizontal is arranged, and active conductive shell fragment rear portion is hinged with the first pin, and activity is led
Being groove-like in the middle part of electricity shell fragment, groove is provided with the second spring, and the second spring bottom end is by spring base and active conductive shell fragment
Fixing, the second spring top is fixed with housing；Active conductive shell fragment front bottom end is provided with the first contact, sets immediately below the first contact
Having the second contact, this second contact electrically connects the first binding post；Active conductive shell fragment front bottom surface offsets with limited block end face；
The first described binding post electrically connects with power-off protecting circuit plate, the second binding post and power-off protecting circuit plate
Electrical connection, the second pin electrically connects with power-off protecting circuit plate.
Preferably, it also includes varistor, and varistor one end electrically connects the second pin, varistor other end electricity
Connect power-off protecting circuit plate.
Preferably, described housing being fixed with connecting plate, connecting plate top is fixed with the second spring top.
Preferably, described switching circuit board top is electrically connected with power-off protecting circuit plate by power spring.
As preferably, the first described binding post connects power-off protecting circuit plate, the second wiring by the first conducting strip
Terminal connects power-off protecting circuit plate by the second conducting strip, and the second pin connects power-off protecting circuit by the 3rd conducting strip.
Preferably, described power-off protecting circuit plate is provided with power-off protecting circuit, and described power-off protecting circuit includes
Alternating current input, rectification reduction voltage circuit, latching circuit, thyristor gating circuit and controllable silicon；The first described binding post
Connected the L pole of alternating current input by the first conducting strip, silicon controlled negative electrode connects the N pole of alternating current input, alternating current
The L pole of input connects the first pin by the master switch being made up of the first contact and the second contact, and silicon controlled anode connects
Second pin；Described rectification reduction voltage circuit is connected with alternating current input, rectification reduction voltage circuit respectively with latching circuit and can
Control silicon triggers circuit and connects；Described thyristor gating circuit for providing the trigger voltage signal of conducting for controllable silicon；Described
Latching circuit for providing the trigger voltage signal of conducting for thyristor gating circuit.
Preferably, described rectification reduction voltage circuit includes resistance R1, diode D1, resistance R2 and electric capacity C1, diode D1
Positive pole be connected with the L pole of alternating current input by resistance R1, the negative pole of diode D1 passes sequentially through resistance R1 and electric capacity C1
It is connected with the N pole of alternating current input；
Described latching circuit includes resistance R3, resistance R4, resistance R5 and audion Q1, and resistance R3 is in parallel with electric capacity C1,
Parallel resistance R3 between emitter stage and the colelctor electrode of audion Q1, parallel resistance R5 between base stage and the emitter stage of audion Q1；
Described thyristor gating circuit includes diac DB3, resistance R7, resistance R8, electric capacity C2, metal-oxide-semiconductor Q2, touches
The one end sending out diode DB3 connects silicon controlled control pole, and the other end of diac DB3 is defeated with alternating current by resistance R7
The N pole entering end connects, the capacitance of the electric capacity C2 capacitance less than electric capacity C1；
Described switching circuit board is provided with on-off circuit, and active contacting plate and on-off circuit constitute auxiliary switch, exchange
The L pole of electrical input connects the first pin by master switch, and the N pole of alternating current input passes sequentially through resistance R7, resistance R8, leads
Electrical spring, auxiliary switch connect the second pin；
The S pole of described metal-oxide-semiconductor Q2 connects the N pole of alternating current input, and the D pole of metal-oxide-semiconductor Q2 connects electric capacity C2 and resistance
The junction point of R4, the colelctor electrode of the G pole connecting triode Q1 of metal-oxide-semiconductor Q2.
Preferably, between anode and the negative electrode of described controllable silicon Q3 in parallel with varistor RT1.
The beneficial effects of the utility model are: be made up of master switch the first contact and the second contact, active contacting plate with
Switching circuit board constitutes auxiliary switch, master switch and auxiliary switch closure or openness simultaneously under motion bar effect, then with power-off
Protection circuit matches, it is achieved that reliable and stable power-off protection function.
Accompanying drawing explanation
Fig. 1 is the first side view of this utility model cut-offing protecting switch；
Fig. 2 is the second side view of this utility model cut-offing protecting switch；
Fig. 3 is the left view of this utility model cut-offing protecting switch；
Fig. 4 is the structural representation of this utility model active conductive shell fragment；
Fig. 5 is the circuit theory diagrams of this utility model power-off protecting circuit.
Detailed description of the invention
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings, but claimed by this utility model
Scope be not limited to this.
With reference to Fig. 1-4, a kind of cut-offing protecting switch, it includes housing 1, power-off protecting circuit plate 2, switching circuit board 3, lives
Lever 4, active conductive shell fragment 5, alternating current outfan and load input terminal；
Described motion bar 4 is vertically arranged, and motion bar 4 bottom is connected housing 1, motion bar 4 and with by the first spring 6
One spring 6 top is fixed, and the first spring 6 bottom is fixed with housing, and motion bar 4 side is provided with limited block 7, and opposite side is provided with activity
Contact chip 8, switching circuit board 3 is located at the side corresponding with active contacting plate 8, switching circuit board 3 top and power-off protection electricity
Road plate 2 electrically connects；
Described alternating current outfan includes the first binding post 9 and the second binding post 10, described load input terminal
Including the first pin 11 and the second pin 12；
With reference to Fig. 1, Fig. 4, described active conductive shell fragment 5 anterior-posterior horizontal is arranged, and active conductive shell fragment 5 rear portion is inserted with first
Foot 11 is hinged, is groove-like in the middle part of active conductive shell fragment, is provided with the second spring 13 at groove 22, and the second spring 13 bottom is passed through
Spring base 23 is fixed with active conductive shell fragment 5, and the second spring 13 top is fixed with housing；Active conductive shell fragment 5 front bottom end sets
Having the first contact 14, the first contact 14 to be arranged right below the second contact 15, this second contact 15 electrically connects the first binding post 9；
Active conductive shell fragment 5 front bottom surface offsets with limited block 7 end face；
The first described binding post 9 connects power-off protecting circuit plate 2 by the first conducting strip 16, and the second binding post leads to
Crossing the second conducting strip 17 and connect power-off protecting circuit plate 2, the second pin connects power-off protecting circuit plate by the 3rd conducting strip 18
2。
Being additionally provided with varistor 19 on described cut-offing protecting switch, varistor 19 one end electrically connects the second pin 12,
Varistor 19 other end electrical connection power-off protecting circuit plate 2.
Being fixed with connecting plate 20 on described housing 1, connecting plate 20 top is fixed with the second spring 13 top.
Described switching circuit board 3 top is electrically connected with power-off protecting circuit plate 2 by power spring 21.
Described power-off protecting circuit plate is provided with power-off protecting circuit, and with reference to Fig. 5, described power-off protecting circuit includes
Alternating current input, rectification reduction voltage circuit, latching circuit, thyristor gating circuit and controllable silicon；The first described binding post
Connected the L pole c of alternating current input by the first conducting strip, silicon controlled negative electrode connects the N pole d of alternating current input, exchange
The L pole of electrical input connects the first pin by the master switch being made up of the first contact and the second contact, and silicon controlled anode is even
Connect the second pin；Described rectification reduction voltage circuit is connected with alternating current input, rectification reduction voltage circuit respectively with latching circuit and
Thyristor gating circuit connects；Described thyristor gating circuit for providing the trigger voltage signal of conducting for controllable silicon；Institute
State latching circuit for providing the trigger voltage signal of conducting for thyristor gating circuit.
With reference to Fig. 5, described rectification reduction voltage circuit includes resistance R1, diode D1, resistance R2 and electric capacity C1, diode D1
Positive pole be connected with the L pole of alternating current input by resistance R1, the negative pole of diode D1 passes sequentially through resistance R1 and electric capacity C1
It is connected with the N pole of alternating current input；
Described latching circuit includes resistance R3, resistance R4, resistance R5 and audion Q1, and resistance R3 is in parallel with electric capacity C1,
Parallel resistance R3 between emitter stage and the colelctor electrode of audion Q1, parallel resistance R5 between base stage and the emitter stage of audion Q1；
Described thyristor gating circuit includes diac DB3, resistance R7, resistance R8, electric capacity C2, metal-oxide-semiconductor Q2, touches
The one end sending out diode DB3 connects silicon controlled control pole, and the other end of diac DB3 is defeated with alternating current by resistance R7
The N pole entering end connects, the capacitance of the electric capacity C2 capacitance less than electric capacity C1；
Described switching circuit board is provided with on-off circuit, and active contacting plate and on-off circuit constitute auxiliary switch, exchange
The L pole of electrical input connects the first pin by master switch, and the N pole of alternating current input passes sequentially through resistance R7, resistance R8, leads
Electrical spring, auxiliary switch connect the second pin；
The S pole of described metal-oxide-semiconductor Q2 connects the N pole of alternating current input, and the D pole of metal-oxide-semiconductor Q2 connects electric capacity C2 and resistance
The junction point of R4, the colelctor electrode of the G pole connecting triode Q1 of metal-oxide-semiconductor Q2.
Between anode and the negative electrode of described controllable silicon Q3 in parallel with varistor RT1.
Operation principle of the present utility model is:
Under original state, motion bar 4 is upspring under the first spring 6 effect, and the second spring 13 is in compressive state, spacing
Lower first contact 14 of block 7 effect and the second contact 15 keep separating, and active contacting plate 8 separates with switching circuit board 3, on-off circuit
Do not turn on.Being electrically connected with city by the first binding post 9 and the second binding post 10 by alternating current outfan, load input terminal leads to
Cross the first pin 11 (Fig. 5 (to be connected with motor for end points b) in Fig. 5 for end points a) and the second pin 12.Now, master switch with
Auxiliary switch is in open mode, and after alternating current input electrically connects with city, L pole obtains after resistance R1, diode D1, resistance R2
DC voltage to about 5V.Now, the D pole of metal-oxide-semiconductor Q2 turns on S pole, and electric capacity C2 passes through metal-oxide-semiconductor Q2 ground connection, latching circuit
Be equivalent to short circuit, inoperative.It is not set up forward voltage between anode and the negative electrode of controllable silicon Q3, therefore remains off,
Do not work without output voltage, motor between first pin 11 and the second pin 12.
Being pressed by motion bar 4, limited block 7 and active contacting plate 8 move down therewith, active conductive under the second spring 13 effect
Shell fragment is pressed under front portion, and the first contact 14 contacts conducting with the second contact 15；Active contacting plate 8 connects with the contact of switching circuit board 3
Touch and on-off circuit is turned on.That is, the first contact and the second contact master switch, active contacting plate and switching circuit board are constituted
Constituting auxiliary switch, motion bar 4 is pressed master switch and is closed at auxiliary switch, and motion bar 4 is upspring, and master switch is opened with auxiliary
Close and open simultaneously.Now, L pole supplies diac DB3 by resistance R8 blood pressure lowering, produces the trigger voltage more than 30V, now
The D pole of metal-oxide-semiconductor Q2 is held on S pole, and electric capacity C2 produces sawtooth voltage over the ground by metal-oxide-semiconductor Q2, and this sawtooth voltage supplies
Turn on to diac DB3, after diac DB3 conducting and then the G pole, control pole of triggering controllable silicon Q3, controllable silicon Q3's
(output 220V), motor work (motor rotation) is turned between anode and negative electrode.
After civil power disconnects power supply suddenly, motion bar 4 is maintained at down state, now the anode of controllable silicon Q3 and negative electrode it
Between be not set up forward voltage, automatically remain off (output 0V), motor does not works (motor is inoperative).
When external voltage recovers normal (alternating current input and civil power are again coupled to), if master switch is opened with auxiliary
Pass is maintained at closure state, then L pole supplies diac DB3 by resistance R8 blood pressure lowering, produces the trigger voltage more than 30V,
Through electric capacity C2 blood pressure lowering, owing to the capacitance of electric capacity C2 is much smaller than the capacitance of electric capacity C1, therefore after restoring electricity, first power supply exists
Voltage is set up in the D pole of metal-oxide-semiconductor Q2, and G sets up voltage the most afterwards, is not turned between D pole and S pole.Audion Q1 is supplied by resistance R4
Base stage (B) running voltage, now turns between colelctor electrode (C) and the emitter stage (E) of audion Q1.The D of locking metal-oxide-semiconductor Q2 is the most electric
Pressure, more than G pole tension, is in not on-state between D pole and the S pole of metal-oxide-semiconductor Q2, it is impossible to produces sawtooth voltage, forces triggering
Diode DB3 off-state, does not now have the G pole, control pole of trigger voltage supply controllable silicon Q3, and controllable silicon Q3 remains open shape
State (output 0V), motor keeps shutting down state.
For allowing motor work, now master switch and auxiliary switch should be opened (upspring by motion bar 4 and press) the most simultaneously,
Now audion Q1 is not because having running voltage, is not turned on, now metal-oxide-semiconductor between colelctor electrode (C) and the emitter stage (E) of audion Q1
The G pole of Q2 obtains the DC voltage of about 5V, turns between D pole and the S pole of metal-oxide-semiconductor Q2.Locking audion Q1 work electricity simultaneously
Pressure drop is 0V, and latching circuit voltage circuit is equivalent to short-circuit condition, and audion Q1 does not works.The most simultaneously by master switch with auxiliary
Helping switch Guan Bi, L pole supplies diac DB3 by resistance R8 blood pressure lowering, produces the trigger voltage more than 30V, now because of MOS
The D pole of pipe Q2 is kept on S pole, and electric capacity C2 produces sawtooth voltage over the ground by metal-oxide-semiconductor Q2, this sawtooth voltage
Supply diac DB3 conducting, diac DB3 conducting after so that trigger controllable silicon Q3 G pole, control pole, controllable silicon Q3
Tending to remain on (output 220V), have output voltage between the first pin 11 and the second pin 12, (motor is transported in motor work
Turn).
Varistor is RT1 wafer type varistor components and parts, is primarily used to protect controllable silicon, when motor power-off,
Motor produces inverse peak voltage, and when inverse peak voltage exceedes certain value, RT1 wafer type varistor components and parts tend to remain on,
Now protect controllable silicon.When inverse peak voltage returns to normal value, RT1 wafer type varistor components and parts automatically restore to break
Open state.
Claims (8)
1. a cut-offing protecting switch, it is characterised in that: it includes housing, power-off protecting circuit plate, switching circuit board, activity
Bar, active conductive shell fragment, alternating current outfan and load input terminal；
Described motion bar is vertically arranged, and motion bar bottom is connected housing, motion bar and the first spring top with by the first spring
End is fixing, and the first spring bottom end is fixed with housing, and motion bar side is provided with limited block, and opposite side is provided with active contacting plate, switch
Circuit board is located at the side corresponding with active contacting plate, and switching circuit board top electrically connects with power-off protecting circuit plate；
Described alternating current outfan includes the first binding post and the second binding post, and described load input terminal includes first
Pin and the second pin；
Described active conductive shell fragment anterior-posterior horizontal is arranged, and active conductive shell fragment rear portion is hinged with the first pin, active conductive bullet
Being groove-like in the middle part of sheet, groove is provided with the second spring, and the second spring bottom end is fixed with active conductive shell fragment by spring base,
Second spring top is fixed with housing；Active conductive shell fragment front bottom end is provided with the first contact, and the first contact is arranged right below
Two contacts, this second contact electrically connects the first binding post；Active conductive shell fragment front bottom surface offsets with limited block end face；
The first described binding post electrically connects with power-off protecting circuit plate, and the second binding post is electrically connected with power-off protecting circuit plate
Connecing, the second pin electrically connects with power-off protecting circuit plate.
Cut-offing protecting switch the most according to claim 1, it is characterised in that: it also includes varistor, varistor
One end electrically connects the second pin, varistor other end electrical connection power-off protecting circuit plate.
Cut-offing protecting switch the most according to claim 1, it is characterised in that: it is fixed with connecting plate on described housing, even
Fishplate bar top is fixed with the second spring top.
Cut-offing protecting switch the most according to claim 1, it is characterised in that: described switching circuit board top is by conduction
Spring electrically connects with power-off protecting circuit plate.
Cut-offing protecting switch the most according to claim 4, it is characterised in that: the first described binding post is led by first
Electricity sheet connects power-off protecting circuit plate, and the second binding post connects power-off protecting circuit plate, the second pin by the second conducting strip
Power-off protecting circuit is connected by the 3rd conducting strip.
Cut-offing protecting switch the most according to claim 5, it is characterised in that: described power-off protecting circuit plate is provided with disconnected
Electric protection circuit, described power-off protecting circuit includes that alternating current input, rectification reduction voltage circuit, latching circuit, controllable silicon touch
Power Generation Road and controllable silicon；The first described binding post connects the L pole of alternating current input, silicon controlled by the first conducting strip
Negative electrode connects the N pole of alternating current input, and the L pole of alternating current input is opened by the master being made up of the first contact and the second contact
Closing and connect the first pin, silicon controlled anode connects the second pin；Described rectification reduction voltage circuit is connected with alternating current input,
Rectification reduction voltage circuit is connected with latching circuit and thyristor gating circuit respectively；Described thyristor gating circuit is for for controlled
Silicon provides the trigger voltage signal of conducting；Described latching circuit for providing the trigger voltage letter of conducting for thyristor gating circuit
Number.
Cut-offing protecting switch the most according to claim 6, it is characterised in that: described rectification reduction voltage circuit includes resistance
R1, diode D1, resistance R2 and electric capacity C1, the positive pole of diode D1 is connected with the L pole of alternating current input by resistance R1, and two
The negative pole of pole pipe D1 passes sequentially through resistance R1 and electric capacity C1 and is connected with the N pole of alternating current input；
Described latching circuit includes resistance R3, resistance R4, resistance R5 and audion Q1, and resistance R3 is in parallel with electric capacity C1, three poles
Parallel resistance R3 between emitter stage and the colelctor electrode of pipe Q1, parallel resistance R5 between base stage and the emitter stage of audion Q1；
Described thyristor gating circuit includes diac DB3, resistance R7, resistance R8, electric capacity C2, metal-oxide-semiconductor Q2, triggers two
One end of pole pipe DB3 connects silicon controlled and controls pole, and the other end of diac DB3 is by resistance R7 and alternating current input
N pole connect, the capacitance of electric capacity C2 is less than the capacitance of electric capacity C1；
Described switching circuit board is provided with on-off circuit, and active contacting plate constitutes auxiliary switch with on-off circuit, and alternating current is defeated
The L pole entering end connects the first pin by master switch, and the N pole of alternating current input passes sequentially through resistance R7, resistance R8, conduction bullet
Spring, auxiliary switch connect the second pin；
The S pole of described metal-oxide-semiconductor Q2 connects the N pole of alternating current input, and the D pole of metal-oxide-semiconductor Q2 connects electric capacity C2 and resistance R4's
Junction point, the colelctor electrode of the G pole connecting triode Q1 of metal-oxide-semiconductor Q2.
Cut-offing protecting switch the most according to claim 7, it is characterised in that: the anode of described controllable silicon Q3 and negative electrode it
Between in parallel with varistor RT1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620619610.4U CN205810732U (en) | 2016-06-21 | 2016-06-21 | A kind of cut-offing protecting switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620619610.4U CN205810732U (en) | 2016-06-21 | 2016-06-21 | A kind of cut-offing protecting switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205810732U true CN205810732U (en) | 2016-12-14 |
Family
ID=57505477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620619610.4U Active CN205810732U (en) | 2016-06-21 | 2016-06-21 | A kind of cut-offing protecting switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205810732U (en) |
-
2016
- 2016-06-21 CN CN201620619610.4U patent/CN205810732U/en active Active
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| GR01 | Patent grant |