CN112406309A - Intelligent device for preventing blockage caused by volatilization and crystallization of ink marks of spray head for inkjet printer - Google Patents
Intelligent device for preventing blockage caused by volatilization and crystallization of ink marks of spray head for inkjet printer Download PDFInfo
- Publication number
- CN112406309A CN112406309A CN202011323549.6A CN202011323549A CN112406309A CN 112406309 A CN112406309 A CN 112406309A CN 202011323549 A CN202011323549 A CN 202011323549A CN 112406309 A CN112406309 A CN 112406309A
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- China
- Prior art keywords
- rod
- fixedly connected
- temporary storage
- swing joint
- intelligent device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000007921 spray Substances 0.000 title claims abstract description 27
- 238000002425 crystallisation Methods 0.000 title claims abstract description 17
- 230000008025 crystallization Effects 0.000 title claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 41
- 238000004140 cleaning Methods 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000003825 pressing Methods 0.000 claims description 4
- 239000010865 sewage Substances 0.000 abstract description 9
- 238000007592 spray painting technique Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 8
- 238000005406 washing Methods 0.000 description 7
- 238000007641 inkjet printing Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000001680 brushing effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
- B41J2/16517—Cleaning of print head nozzles
- B41J2/16535—Cleaning of print head nozzles using wiping constructions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
- B41J2/16517—Cleaning of print head nozzles
- B41J2/16552—Cleaning of print head nozzles using cleaning fluids
Landscapes
- Ink Jet (AREA)
Abstract
The invention relates to the technical field of computer spray painting, and discloses an intelligent device for preventing blockage caused by volatilization and crystallization of ink marks of a spray head for a spray painting machine, which comprises a shell, wherein the top of the shell is fixedly connected with the spray head, the side surface of the inner wall of the spray head is provided with a side hole, the inner wall of the side hole is movably connected with a piston, the side surface of the piston is fixedly connected with a piston rod, the other end of the piston rod is fixedly connected with a temporary storage bin, the other end of a folded rod is movably connected with a pressure rod, the other end of the pressure rod is fixedly connected with a cleaning liquid bag, the other end of a push rod is movably connected with a brush rod, the bottom of the temporary storage bin is fixedly connected with a liquid outlet pipe, the surface of a gear is meshed with a water baffle, the surface of the water baffle is movably connected with an ink nozzle, the water baffle is driven to seal the ink nozzle, and sewage is collected through the through hole of the water baffle.
Description
Technical Field
The invention relates to the technical field of computer inkjet printing, in particular to an intelligent device for preventing blockage caused by volatilization and crystallization of nozzle ink marks for an inkjet printer.
Background
The inkjet printing is a basic and traditional performance technique in the advertising field, has the characteristics of fineness and reality compared with other hand-drawing techniques, is generally characterized in that a computer is connected with an inkjet printer or a photo machine, patterns needing inkjet printing are transmitted to the inkjet printer, then the inkjet printer performs inkjet printing, and the inkjet printer performs inkjet printing through siphon pressure generated by the Bernoulli principle.
When the inkjet printer is carrying out the air brushing, a small amount of ink can be attached to the shower nozzle surface, the air brushing ink has volatility, through volatilizing the crystallization gradually at the shower nozzle surface area tired up, when the crystallization is too much, can reduce the shower nozzle bore and block up the shower nozzle even, generally, just need wash the shower nozzle after inkjet printer work removes for a long time, often wash work load big, and the sewage after wasing also needs artifical the collection, consequently, we provide an intelligent device that prevents that shower nozzle ink mark from volatilizing the crystallization and taking place to block up for the inkjet printer.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides an intelligent device for preventing blockage caused by volatilization and crystallization of ink marks of a spray head for an inkjet printer, which has the advantages of automatically cleaning ink on the surface of the spray head to prevent crystallization and automatically recovering cleaned sewage when the spray head is stopped, and solves the problems that the spray head needs to be cleaned frequently and the cleaned sewage needs to be collected manually.
(II) technical scheme
In order to realize the purposes of automatically cleaning ink on the surface of the spray head to prevent crystallization and automatically recovering the cleaned sewage when the machine is stopped, the invention provides the following technical scheme: an intelligent device for preventing blockage caused by volatilization and crystallization of ink marks of a spray head for a spray painting machine comprises a shell, the top of the shell is fixedly connected with the spray head, the side surface of the inner wall of the spray head is provided with a side hole, the inner wall of the side hole is movably connected with a piston, the side surface of the piston is fixedly connected with a piston rod, the other end of the piston rod is fixedly connected with a temporary storage bin, the surface of the piston rod is movably connected with a first connecting rod, the other end of the first connecting rod is movably connected with a slide block, the side surface of the slide block is movably connected with a slide rod, the side surface of the slide block is fixedly connected with a spring, the top of the slide block is movably connected with a folded rod, the other end of the folded rod is movably connected with a pressure rod, the other end of the pressure rod is fixedly connected with, one end swing joint of brush-holder stud has the carousel, and the bottom fixedly connected with drain pipe of temporary storage storehouse, the inner wall side swing joint of drain pipe have the rotation oar, rotate oar surface swing joint and have the belt, belt surface swing joint has the gear, and the gear surface meshing has the breakwater, and the spacing spring of one end fixedly connected with of breakwater, breakwater surface swing joint have the ink spout.
Preferably, one side surface of the temporary storage bin is a flexible plate, and one end of the piston rod is fixedly connected to the flexible plate of the temporary storage bin.
Preferably, the bottom and the top of the inner wall of the side hole are both provided with a limiting block, and the side face of the limiting block at the inner wall of the side hole is coupled with one end of the piston rod.
Preferably, the cleaning liquid bag is fixedly connected to the top of the temporary storage bin, the top of the one-way valve at the top of the temporary storage bin is fixedly connected to the bottom of the inner wall of the cleaning liquid bag, and the one-way valve at the bottom of the temporary storage bin is located between the inner walls of the liquid outlet pipes.
Preferably, the inflection point of the zigzag rod is fixedly connected to the surface of the spray head through a rotating shaft, and the surface of the zigzag rod is fixedly connected to the surface of the cleaning liquid bag through a spring.
Preferably, the both ends of the brush rod are provided with cross rods, the cross rod at the bottom of the brush rod and the surface are provided with brushes, and the rotating paddle is movably connected with the other side surface of the rotating disc through another belt.
Preferably, the top of the water baffle is provided with a latch, the top of the water baffle and two ends of the water baffle are provided with through holes and communicated with each other, the number of the water baffles is two, and the limiting springs are fixedly connected between the water baffles.
(III) advantageous effects
Compared with the prior art, the invention provides an intelligent device for preventing blockage caused by volatilization and crystallization of ink marks of a spray head for an inkjet printer, and the intelligent device has the following beneficial effects:
1. this inkjet printer is with preventing intelligent device that nozzle ink mark blockked up volatilization crystallization and blockked up, when ink blowout through the shower nozzle in for produce the pressure differential between shower nozzle and the side opening, drive piston and piston rod and move to the inboard, produce the negative pressure in the temporary storage storehouse and inhale the temporary storage storehouse with the interior washing liquid of washing liquid bag in, the piston rod drives the depression bar through the connecting action of first connecting rod, slider, accordion pole and depression bar simultaneously and extrudes washing liquid bag top, makes the interior washing liquid of washing liquid bag get into in the temporary storage storehouse.
When the sprayer stops spraying ink, the piston and the piston rod reset under the driving of the spring, the piston rod drives the push rod to move inwards, meanwhile, cleaning liquid in the temporary storage bin is extruded to enter the liquid outlet pipe, the cleaning liquid flows to drive the rotating paddle to rotate, so that the brush rod performs reciprocating friction on the surface of the sprayer, the friction force between the surface of the sprayer and the brush rod is increased by the pressing force of the push rod, and the purpose of automatically cleaning ink on the surface of the sprayer to prevent crystallization is achieved when the sprayer stops spraying ink.
2. This inkjet printer is with preventing intelligent device that nozzle ink mark blockked up crystallization of volatilizing blocks up rotates through rotating the oar, drives gear revolve for the breakwater moves to the inboard, seals ink spout surface through-hole, and the through-hole at two breakwater tops receives ink and the washing liquid that the shower nozzle bottom flows down, and collects sewage through breakwater side through-hole, thereby reaches the purpose of automatic recovery sewage after the washing.
Drawings
FIG. 1 is a schematic view of the housing structure of the present invention;
FIG. 2 is a schematic view of the side hole structure of the present invention;
FIG. 3 is a schematic view of the structure of the compression bar of the present invention;
FIG. 4 is a schematic diagram of a temporary storage bin according to the present invention;
FIG. 5 is a schematic view of the water baffle of the present invention.
In the figure: 1. a housing; 2. a spray head; 3. a side hole; 4. a piston; 5. a piston rod; 6. a temporary storage bin; 7. a first link; 8. a slider; 9. a slide bar; 10. a spring; 11. a zigzag rod; 12. a pressure lever; 13. cleaning the liquid bag; 14. a one-way valve; 15. a second link; 16. a push rod; 17. a turntable; 18. a brush bar; 19. a liquid outlet pipe; 20. rotating the paddle; 21. a belt; 22. a gear; 23. a water baffle; 24. a limiting spring; 25. an ink jet.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, an intelligent device for preventing blockage caused by volatilization and crystallization of nozzle ink marks for an inkjet printer comprises a shell 1, a nozzle 2 is fixedly connected to the top of the shell 1, a side hole 3 is formed in the side surface of the inner wall of the nozzle 2, a piston 4 is movably connected to the inner wall of the side hole 3, a piston rod 5 is fixedly connected to the side surface of the piston 4, limit blocks are arranged at the bottom and the top of the inner wall of the side hole 3, the side surface of the limit block at the inner wall of the side hole 3 is coupled with one end of the piston rod 5, a temporary storage bin 6 is fixedly connected to the other end of the piston rod 5, one side surface of the temporary storage bin 6 is.
The surface swing joint of piston rod 5 has first connecting rod 7, the other end swing joint of first connecting rod 7 has slider 8, 8 side surface swing joints of slider have slide bar 9, 8 side fixedly connected with springs 10 of slider, the top swing joint of slider 8 has a book shape pole 11, the other end swing joint of book shape pole 11 has depression bar 12, the other end fixedly connected with of depression bar 12 washs liquid bag 13, book shape pole 11 inflection point department is on the surface of shower nozzle 2 through a pivot fixed connection, book shape pole 11 surface is on the surface of wasing liquid bag 13 through a spring fixed connection.
When the ink in the nozzle 2 is sprayed out, the air pressure difference is generated between the nozzle 2 and the side hole 3, the piston 4 and the piston rod 5 are driven to move towards the inner side, the negative pressure generated in the temporary storage bin 6 sucks the cleaning liquid in the cleaning liquid bag 13 into the temporary storage bin 6, and meanwhile, the piston rod 5 drives the pressure rod 12 to extrude the top of the cleaning liquid bag 13 through the connection effect of the first connecting rod 7, the sliding block 8, the folding rod 11 and the pressure rod 12, so that the cleaning liquid in the cleaning liquid bag 13 enters the temporary storage bin 6.
When the spray head 2 stops spraying ink, the piston 4 and the piston rod 5 are reset under the driving of the spring 10, the piston rod 5 drives the push rod 16 to move inwards, meanwhile, cleaning liquid in the temporary storage bin 6 is extruded to enter the liquid outlet pipe 19, the cleaning liquid flows to drive the rotating paddle 20 to rotate, so that the brush rod 18 performs reciprocating friction on the surface of the spray head 2, and the pressing force of the push rod 16 increases the friction force between the surface of the spray head 2 and the brush rod 18.
The rotating paddle 20 rotates to drive the gear 22 to rotate, so that the water baffle 23 moves inwards to seal through holes in the surface of the ink nozzle 25, the through holes in the tops of the two water baffles 23 receive ink and cleaning liquid flowing down from the bottom of the spray head 2, and sewage is collected through the through holes in the side surfaces of the water baffle 23.
The equal fixedly connected with check valve 14 in inner wall top and the bottom of temporary storage 6, the surface swing joint of piston rod 5 has second connecting rod 15, the other end swing joint of second connecting rod 15 has push rod 16, the other end swing joint of push rod 16 has brush-holder stud 18, the one end swing joint of brush-holder stud 18 has carousel 17, the bottom fixedly connected with drain pipe 19 of temporary storage 6, wash liquor bag 13 fixed connection is at the top of temporary storage 6, the top fixed connection of temporary storage 6 top department check valve 14 is in the inner wall bottom of wash liquor bag 13, temporary storage 6 bottom check valve 14 is located between the drain pipe 19 inner wall, the inner wall side swing joint of drain pipe 19 has rotation oar 20.
Brush-holder stud 18 both ends all are provided with the horizontal pole, 18 bottom horizontal poles of brush-holder stud are provided with the brush with the surface, it has another side swing joint of carousel 17 to rotate oar 20 through another belt, it has belt 21 to rotate 20 swing joint in surface of oar, belt 21 surface swing joint has gear 22, gear 22 surface meshing has breakwater 23, the spacing spring 24 of one end fixedly connected with of breakwater 23, breakwater 23 top sets up the latch, the through-hole has all been seted up at breakwater 23 top and both ends and has been link up each other, breakwater 23 quantity is two, spacing spring 24 fixed connection is between breakwater 23, breakwater 23 surface swing joint has ink spout 25.
The working principle is as follows: when the ink in the nozzle 2 is sprayed out, the air pressure difference is generated between the nozzle 2 and the side hole 3, the piston 4 and the piston rod 5 are driven to move towards the inner side, the negative pressure generated in the temporary storage bin 6 sucks the cleaning liquid in the cleaning liquid bag 13 into the temporary storage bin 6, and meanwhile, the piston rod 5 drives the pressure rod 12 to extrude the top of the cleaning liquid bag 13 through the connection effect of the first connecting rod 7, the sliding block 8, the folding rod 11 and the pressure rod 12, so that the cleaning liquid in the cleaning liquid bag 13 enters the temporary storage bin 6.
When the spray head 2 stops spraying ink, the piston 4 and the piston rod 5 are reset under the driving of the spring 10, the piston rod 5 drives the push rod 16 to move inwards, meanwhile, cleaning liquid in the temporary storage bin 6 is extruded to enter the liquid outlet pipe 19, the cleaning liquid flows to drive the rotating paddle 20 to rotate, so that the brush rod 18 performs reciprocating friction on the surface of the spray head 2, and the pressing force of the push rod 16 increases the friction force between the surface of the spray head 2 and the brush rod 18.
The rotating paddle 20 rotates to drive the gear 22 to rotate, so that the water baffle 23 moves inwards to seal through holes in the surface of the ink nozzle 25, the through holes in the tops of the two water baffles 23 receive ink and cleaning liquid flowing down from the bottom of the spray head 2, and sewage is collected through the through holes in the side surfaces of the water baffle 23.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides an inkjet printer is with preventing that shower nozzle ink mark volatilizees crystallization takes place intelligent device that blocks up, includes shell (1), its characterized in that: the cleaning device is characterized in that a spray head (2) is fixedly connected to the top of a shell (1), a side hole (3) is formed in the side face of the inner wall of the spray head (2), a piston (4) is movably connected to the inner wall of the side hole (3), a piston rod (5) is fixedly connected to the side face of the piston (4), a temporary storage bin (6) is fixedly connected to the other end of the piston rod (5), a first connecting rod (7) is movably connected to the surface of the piston rod (5), a sliding block (8) is movably connected to the other end of the first connecting rod (7), a sliding rod (9) is movably connected to the side face of the sliding block (8), a spring (10) is fixedly connected to the side face of the sliding block (8), a folded rod (11) is movably connected to the top of the sliding block (8), a pressing rod (12) is movably connected to the other end of, the surface swing joint of piston rod (5) has second connecting rod (15), the other end swing joint of second connecting rod (15) has push rod (16), the other end swing joint of push rod (16) has brush-holder stud (18), the one end swing joint of brush-holder stud (18) has carousel (17), the bottom fixedly connected with drain pipe (19) of temporary storage storehouse (6), the inner wall side swing joint of drain pipe (19) has rotation oar (20), rotation oar (20) surface swing joint has belt (21), belt (21) surface swing joint has gear (22), gear (22) surface meshing has breakwater (23), the spacing spring of one end fixedly connected with (24) of breakwater (23), breakwater (23) surface swing joint has ink spout (25).
2. The intelligent device for preventing the blockage of the inkjet head ink mark from volatilizing and crystallizing for the inkjet printer according to claim 1, characterized in that: one side of the temporary storage bin (6) is a flexible plate, and one end of the piston rod (5) is fixedly connected to the flexible plate of the temporary storage bin (6).
3. The intelligent device for preventing the blockage of the inkjet head ink mark from volatilizing and crystallizing for the inkjet printer according to claim 1, characterized in that: the bottom and the top of the inner wall of the side hole (3) are both provided with limit blocks, and the side face of the limit block at the inner wall of the side hole (3) is coupled with one end of the piston rod (5).
4. The intelligent device for preventing the blockage of the inkjet head ink mark from volatilizing and crystallizing for the inkjet printer according to claim 1, characterized in that: the cleaning liquid bag (13) is fixedly connected to the top of the temporary storage bin (6), the top of the one-way valve (14) at the top of the temporary storage bin (6) is fixedly connected to the bottom of the inner wall of the cleaning liquid bag (13), and the one-way valve (14) at the bottom of the temporary storage bin (6) is located between the inner walls of the liquid outlet pipes (19).
5. The intelligent device for preventing the blockage of the inkjet head ink mark from volatilizing and crystallizing for the inkjet printer according to claim 1, characterized in that: the inflection point of the zigzag rod (11) is fixedly connected to the surface of the spray head (2) through a rotating shaft, and the surface of the zigzag rod (11) is fixedly connected to the surface of the cleaning liquid bag (13) through a spring.
6. The intelligent device for preventing the blockage of the inkjet head ink mark from volatilizing and crystallizing for the inkjet printer according to claim 1, characterized in that: both ends of the brush rod (18) are provided with cross rods, the cross rod at the bottom of the brush rod (18) and the surface are provided with brushes, and the rotating paddle (20) is movably connected with the other side surface of the turntable (17) through another belt.
7. The intelligent device for preventing the blockage of the inkjet head ink mark from volatilizing and crystallizing for the inkjet printer according to claim 1, characterized in that: the water baffle (23) top sets up the latch, and the through-hole has all been seted up at water baffle (23) top and both ends and has link up each other, and water baffle (23) quantity is two, and spacing spring (24) fixed connection is between water baffle (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011323549.6A CN112406309A (en) | 2020-11-23 | 2020-11-23 | Intelligent device for preventing blockage caused by volatilization and crystallization of ink marks of spray head for inkjet printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011323549.6A CN112406309A (en) | 2020-11-23 | 2020-11-23 | Intelligent device for preventing blockage caused by volatilization and crystallization of ink marks of spray head for inkjet printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112406309A true CN112406309A (en) | 2021-02-26 |
Family
ID=74777995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011323549.6A Withdrawn CN112406309A (en) | 2020-11-23 | 2020-11-23 | Intelligent device for preventing blockage caused by volatilization and crystallization of ink marks of spray head for inkjet printer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112406309A (en) |
-
2020
- 2020-11-23 CN CN202011323549.6A patent/CN112406309A/en not_active Withdrawn
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Application publication date: 20210226 |
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