CN112044822A - Cell-phone speaker hole cleaning device - Google Patents
Cell-phone speaker hole cleaning device Download PDFInfo
- Publication number
- CN112044822A CN112044822A CN202010902419.1A CN202010902419A CN112044822A CN 112044822 A CN112044822 A CN 112044822A CN 202010902419 A CN202010902419 A CN 202010902419A CN 112044822 A CN112044822 A CN 112044822A
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- CN
- China
- Prior art keywords
- cleaning
- cavity
- rod
- sliding
- clamping
- 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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- 238000004140 cleaning Methods 0.000 title claims abstract description 96
- 238000007790 scraping Methods 0.000 claims description 10
- 239000000523 sample Substances 0.000 claims description 8
- 210000003437 trachea Anatomy 0.000 claims description 4
- 238000007789 sealing Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
-
- B08B1/12—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
Abstract
The invention provides a mobile phone loudspeaker hole cleaning device, which comprises a machine body and a cleaning cavity in the machine body, wherein an inlet communicated with the outside is arranged on the top wall of the cleaning cavity, first sliding grooves are symmetrically arranged in the left wall and the right wall of the cleaning cavity, clamping rods are slidably arranged on the first sliding grooves, a first spring is connected between each clamping rod and the corresponding first sliding groove, a clamping plate is fixedly arranged on each clamping rod, a clamping block is arranged on each clamping plate, and the clamping blocks are connected with the clamping plates through first hinge connecting shafts, and the mobile phone loudspeaker hole cleaning device has the advantages that: this device can detect the size in cell-phone speaker hole and select the clearance brush of different diameters to clear up according to the size in hole to the dirt in the hole is scraped to the protractile baffle of clearance brush in the hole, and this device can be adjusted according to the size of cell-phone simultaneously, thereby makes the device can press from both sides and get a plurality of different cell-phones.
Description
Technical Field
The invention relates to the technical field of mobile phone cleaning, in particular to a mobile phone loudspeaker hole cleaning device.
Background
The mobile phone is improved aiming at the problems that the prior art cannot well clean holes with different sizes, and simultaneously dirt in the holes cannot be well removed.
Disclosure of Invention
The invention aims to provide a mobile phone loudspeaker hole cleaning device, which overcomes the problems.
The invention is realized by the following technical scheme.
The invention relates to a mobile phone loudspeaker hole cleaning device, which comprises a machine body and a cleaning cavity in the machine body, wherein an inlet communicated with the outside is arranged on the top wall of the cleaning cavity, first sliding grooves are symmetrically arranged in the left wall and the right wall of the cleaning cavity, a clamping rod is arranged on the first sliding grooves in a sliding manner, a first spring is connected between the clamping rod and the first sliding grooves, a clamping plate is fixedly arranged on the clamping rod, a clamping block is arranged on the clamping plate, the clamping block and the clamping plate are connected through a first hinged connecting shaft, an adjusting cavity positioned at the rear side of the cleaning cavity is arranged in the machine body, an adjusting mechanism is arranged in the adjusting cavity and can adjust the distance between the clamping plates, a first electric sliding rail is arranged on the front wall and the rear wall of the cleaning cavity, a detection block is arranged on the first electric sliding rail in a sliding manner, a second sliding groove is arranged in the detection block, a probe is arranged at the lower end of the second sliding groove in a sliding manner, a pressure sensor is arranged at the lower end of the second sliding groove and can sense the change of stress, a second spring is connected between the probe and the pressure sensor, a third sliding groove is arranged on the front wall of the cleaning cavity, a processing block is arranged on the third sliding groove in a sliding manner, a plurality of fourth sliding grooves are fixedly arranged at the upper end of the processing block, a third spring is connected between the processing block and the lower end of the third sliding groove, a plurality of fourth sliding grooves are arranged on the rear wall of the cleaning cavity, a first top plate is arranged on the fourth sliding grooves in a sliding manner, a top rod is fixedly arranged at the upper end of the first top plate and penetrates through the first magnet and the processing block, a fourth spring is connected between the first top plate and the processing block, a first push plate is arranged at the lower end of the first top plate, and a cleaning motor is arranged in the, the right end of the cleaning motor is in power connection with a turntable shaft, a turntable is fixedly arranged on the turntable shaft, a connecting rod is hinged between the turntable and the first push plate, a second electric slide rail is arranged in the cleaning cavity, a cleaning brush cavity positioned on the right side of the cleaning cavity is arranged in the machine body, the cleaning brush cavity is communicated with the cleaning cavity through an adjusting cavity, the right end of the second electric slide rail extends into the cleaning brush cavity through the adjusting cavity, a fifth slide groove is arranged on the front wall and the rear wall of the cleaning brush cavity, a bottom plate is arranged on the fifth slide groove in a sliding manner, a plurality of second magnets are arranged at the upper end of the bottom plate, a cleaning rod is fixedly arranged on the second magnets, scraping ports are symmetrically arranged on the cleaning rod, a sixth slide groove is arranged in the cleaning rod, a scraping plate is arranged on the sixth slide groove, and a fourth spring is connected between the scraping plate and the cleaning rod, the cleaning brush is characterized in that a seventh sliding groove is formed in the cleaning rod, a pushing block is arranged on the seventh sliding groove in a sliding mode, a fifth spring is connected between the pushing block and the inlet top wall, an inlet is formed in the cleaning rod, a third electric sliding rail is arranged at the lower end of the inlet, a sealing block is arranged on the third electric sliding rail in a sliding mode, the sealing block can control a switch of the inlet, a first threaded groove is formed in the bottom wall of the cleaning brush cavity, a first threaded rod is arranged on the first threaded groove in a rotating mode, a first long gear is fixedly arranged on the first threaded rod, a second top plate is fixedly arranged on the first long gear, the second top plate abuts against the bottom plate, a pushing motor is arranged in the bottom wall of the cleaning brush cavity, the upper end of the pushing motor is connected with a motor shaft in a power mode, and a first gear meshed with the first long gear is fixedly arranged on the motor.
Furthermore, the upper side of the cleaning cavity is provided with a closed door, the closed door is connected with the machine body through a second hinge connecting shaft, and the closed door can control the opening and closing of the inlet.
Furthermore, a handle is arranged on the upper side of the closed door, and the closed door can be driven to rotate along the second hinge connecting shaft by pulling the handle.
Further, guiding mechanism including the symmetry set up in second thread groove in the adjustment chamber back wall, rotate on the second thread groove and be equipped with the second threaded rod, the fixed second long gear that is equipped with on the second threaded rod, the fixed second push pedal that is equipped with on the second threaded rod, the clearance chamber with be connected with the trachea between the adjustment chamber, the second push pedal extends to in the trachea, the symmetry rotates in the adjustment chamber back wall and is equipped with the gear shaft, fixed be equipped with on the gear shaft with second long gear engagement's second gear, it is equipped with the axis of rotation to rotate on the adjustment chamber back wall, the axis of rotation is fixed be equipped with second gear engagement's third gear, the axis of rotation rear end extends to the external world and fixed being equipped with fixed block.
Furthermore, a spongy cushion is arranged on the clamping block.
The invention has the beneficial effects that: this device can detect the size in cell-phone speaker hole and select the clearance brush of different diameters to clear up according to the size in hole to the dirt in the hole is scraped to the protractile baffle of clearance brush in the hole, and this device can be adjusted according to the size of cell-phone simultaneously, thereby makes the device can press from both sides and get a plurality of different cell-phones.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the structure at A-A in FIG. 1;
FIG. 3 is a schematic view of the structure at B-B in FIG. 1;
FIG. 4 is a schematic view of the structure of FIG. 1 at C;
fig. 5 is a schematic diagram of the structure at D in fig. 1.
Detailed Description
The invention will now be described in detail with reference to fig. 1-5, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.
With reference to fig. 1-5, a mobile phone speaker hole cleaning device mainly includes a body 10 and a cleaning cavity 14 in the body 10, an inlet 13 communicated with the outside is provided on the top wall of the cleaning cavity 14, first sliding grooves 20 are symmetrically provided in the left and right walls of the cleaning cavity 14, clamping rods 22 are slidably provided on the first sliding grooves 20, a first spring 21 is connected between the clamping rods 22 and the first sliding grooves 20, a clamping plate 73 is fixedly provided on the clamping rods 22, a clamping block 15 is provided on the clamping plate 73, the clamping block 15 is connected with the clamping plate 73 through a first hinge connecting shaft 16, an adjusting cavity 75 located at the rear side of the cleaning cavity 14 is provided in the body 10, an adjusting mechanism 90 is provided in the adjusting cavity 75, the adjusting mechanism 90 can adjust the distance between the clamping plates 73, a first electric slide rail 23 is provided on the front and rear walls of the cleaning cavity 14, the sliding of first electronic slide rail 23 is equipped with detects piece 26, be equipped with second spout 25 in detecting piece 26, second spout 25 slides and is equipped with probe 28, second spout 25 lower extreme is equipped with pressure sensor 24, pressure sensor 24 can the change of inductive force, probe 28 with be connected with second spring 27 between the pressure sensor 24, be equipped with third spout 34 on the clearance chamber 14 antetheca, the sliding is equipped with processing block 36 on third spout 34, the fixed a plurality of fourth spouts 38 that are equipped with in processing block 36 upper end, processing block 36 with be connected with third spring 35 between the third spout 34 lower extreme, be equipped with a plurality of fourth spouts 41 on the clearance chamber 14 back wall, the sliding is equipped with first roof 40 on fourth spout 41, the fixed ejector pin 39 that is equipped with in first roof 40 upper end, ejector pin 39 passes first magnet 37 and processing block 36, a fourth spring 42 is connected between the first top plate 40 and the processing block 36, a first push plate 33 is arranged at the lower end of the first top plate 40, a cleaning motor 29 is arranged in the left wall of the cleaning cavity 14, a turntable shaft 30 is connected with the right end of the cleaning motor 29 in a power mode, a turntable 31 is fixedly arranged on the turntable shaft 30, a connecting rod 32 is hinged between the turntable 31 and the first push plate 33, a second electric sliding rail 76 is arranged in the cleaning cavity 14, a cleaning brush cavity 19 positioned on the right side of the cleaning cavity 14 is arranged in the machine body 10, the cleaning brush cavity 19 is communicated with the cleaning cavity 14 through an adjusting cavity 75, the right end of the second electric sliding rail 76 extends into the cleaning brush cavity 19 through the adjusting cavity 75, a fifth sliding groove 18 is arranged on the front wall and the rear wall of the cleaning brush cavity 19, a bottom plate 50 is arranged on the fifth sliding groove 18, and a plurality of second magnets 51 are arranged at the upper end of the bottom plate 50, the cleaning rod 52 is fixedly arranged on the second magnet 51, scraping openings 53 are symmetrically formed in the cleaning rod 52, a sixth sliding groove 62 is formed in the cleaning rod 52, a scraping plate 54 is arranged on the sixth sliding groove 62 in a sliding mode, a fourth spring 56 is connected between the scraping plate 54 and the cleaning rod 52, a seventh sliding groove 55 is formed in the cleaning rod 52, a pushing block 61 is arranged on the seventh sliding groove 55 in a sliding mode, a fifth spring 57 is connected between the pushing block 61 and the top wall of the inlet 58, an inlet 58 is formed in the cleaning rod 52, a third electric sliding rail 59 is arranged at the lower end of the inlet 58, a sealing block 60 is arranged on the third electric sliding rail 59 in a sliding mode, the sealing block 60 can control the opening and closing of the inlet 58, a first threaded groove 45 is formed in the bottom wall of the cleaning brush cavity 19, a first threaded rod 44 is arranged on the first threaded groove 45 in a rotating mode, a first long gear 43 is fixedly arranged on the first threaded rod 44, a second top plate 49 is fixedly arranged on the first long gear 43, the second top plate 49 abuts against the bottom plate 50, a pushing motor 46 is arranged in the bottom wall of the cleaning brush cavity 19, the upper end of the pushing motor 46 is in power connection with a motor shaft 47, and a first gear 48 meshed with the first long gear 43 is fixedly arranged on the motor shaft 47.
Advantageously, a closing door 11 is provided on the upper side of the cleaning chamber 14, the closing door 11 is connected to the machine body 10 through a second hinge shaft 17, and the closing door 11 can control the opening and closing of the inlet 13.
Advantageously, the closing door 11 is provided on the upper side with a handle 12, pulling said handle 12 causing the closing door 11 to rotate along said second hinge axis 17.
Beneficially, the adjusting mechanism 90 includes second thread grooves 67 symmetrically disposed in the rear wall of the adjusting cavity 75, a second threaded rod 65 is rotatably disposed on the second thread grooves 67, a second long gear 66 is fixedly disposed on the second threaded rod 65, a second push plate 64 is fixedly disposed on the second threaded rod 65, an air pipe 63 is connected between the cleaning cavity 14 and the adjusting cavity 75, the second push plate 64 extends into the air pipe 63, a gear shaft 68 is symmetrically rotatably disposed in the rear wall of the adjusting cavity 75, a second gear 69 engaged with the second long gear 66 is fixedly disposed on the gear shaft 68, a rotating shaft 71 is rotatably disposed on the rear wall of the adjusting cavity 75, a third gear 72 engaged with the second gear 69 is fixedly disposed on the rotating shaft 71, and a fixing block 70 is fixedly disposed at the rear end of the rotating shaft 71 and extends to the outside.
Advantageously, a sponge pad 74 is provided on the clamping block 15.
The working steps are as follows: pulling the handle 12 to make the closing door 11 rotate along the second hinge shaft 17 to open the entrance 13, putting the mobile phone into the cleaning cavity 14 to a certain position, manually rotating the fixing block 70 to drive the rotating shaft 71, the third gear 72, the second gear 69, the second long gear 66 and the second thread groove 67 to rotate, making the second threaded rod 65 and the second push plate 64 move forward to extrude the air in the air pipe 63, so that the air pushes the clamping rod 22 to slide to a certain position along the first chute 20, then the clamping block 15 rotates along the first hinge shaft 16 to clamp the mobile phone, the detecting block 26 slides rightwards along the first electric slide rail 23, when contacting the mobile phone, the probe 28 slides downwards along the second chute 25 to compress the second spring 27, when contacting the speaker hole, the probe 28 slides upwards along the second chute 25 under the action of the second spring 27, the detecting block 26 senses the change of stress to judge the size and the size of the hole, the pushing motor 46 is started to drive the motor shaft 47, the first gear 48, the first long gear 43 and the first threaded rod 44 to rotate, so that the first threaded rod 44 and the second top plate 49 push the bottom plate 50, the second magnet 51 and the cleaning rod 52 upwards to slide along the fifth sliding groove 18, the cleaning rod 52 with a proper size is selected, then the corresponding number of second magnets 51 loosen the bottom plate 50 and slide leftwards along the second electric sliding rail 76 to the upper end of the fourth sliding groove 38, the second magnet 51 attracts the fourth sliding groove 38, the cleaning motor 29 is started to drive the turntable shaft 30 and the turntable 31 to rotate, so that the connecting rod 32 and the first pushing plate 33 move upwards, so that the first top plate 40 and the ejector rod 39 are pushed upwards to slide along the fourth sliding groove 41 to compress the fourth spring 42, the ejector rod 39 pushes the sealing block 60 to push the processing block 36, the first magnet 37 and the cleaning rod 52 upwards to extend into the hole, then the sealing block 60 slides along the third electric sliding rail 59 to open the inlet 58, the push rod 39 pushes the push block 61 to move upwards along the seventh slide groove 55 to compress the fifth spring 57, so that the push blade 54 slides along the sixth slide groove 62 to extend out of the scraping opening 53, the rotary disc 31 continues to rotate to pull the connecting rod 32, the first push plate 33 moves downwards, the treatment block 36 moves downwards along the third slide groove 34 under the action of the third spring 35, so that the scraper 54 scrapes dirt in the hole, after the treatment block 36 returns to the initial position, the first top plate 40 moves downwards along the fourth slide groove 41 under the action of the fourth spring 42, so that the push block 61 and the push rod 39 are not abutted any more, the push block 61 moves back to the initial position along the seventh slide groove 55 under the action of the fifth spring 57, the scraper 54 moves back to the initial position along the sixth slide groove 62 under the action of the fourth spring 56, and the sealing block 60 slides along the third electric slide rail 59 to reseal the inlet 58.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (5)
1. The utility model provides a cell-phone speaker hole cleaning device, includes the organism and the clearance chamber in the organism which characterized in that: an inlet communicated with the outside is arranged on the top wall of the cleaning cavity, first sliding grooves are symmetrically arranged in the left wall and the right wall of the cleaning cavity, a clamping rod is arranged on the first sliding grooves in a sliding mode, a first spring is connected between the clamping rod and the first sliding grooves, clamping plates are fixedly arranged on the clamping rod, clamping blocks are arranged on the clamping plates, the clamping blocks are connected with the clamping plates through first hinge connecting shafts, an adjusting cavity located on the rear side of the cleaning cavity is arranged in the machine body, an adjusting mechanism is arranged in the adjusting cavity and can adjust the distance between the clamping plates, a first electric sliding rail is arranged on the front wall and the rear wall of the cleaning cavity, a detecting block is arranged on the first electric sliding rail in a sliding mode, a second sliding groove is arranged in the detecting block, a probe is arranged on the second sliding groove in a sliding mode, a pressure sensor is arranged at the lower end of the second sliding groove and can sense the change of stress, a second spring is connected between the probe and the pressure sensor, a third chute is arranged on the front wall of the cleaning cavity, a processing block is arranged on the third chute in a sliding manner, a plurality of fourth chutes are fixedly arranged at the upper end of the processing block, a third spring is connected between the processing block and the lower end of the third chute, a plurality of fourth chutes are arranged on the rear wall of the cleaning cavity, a first top plate is arranged on the fourth chute in a sliding manner, an ejector rod is fixedly arranged at the upper end of the first top plate and penetrates through the first magnet and the processing block, a fourth spring is connected between the first top plate and the processing block, a first push plate is arranged at the lower end of the first top plate, a cleaning motor is arranged in the left wall of the cleaning cavity, the right end of the cleaning motor is connected with a turntable shaft in a power manner, a turntable is fixedly arranged on the turntable shaft, and a connecting rod is hinged between the turntable and the first push plate, the cleaning brush is characterized in that a second electric slide rail is arranged in the cleaning cavity, a cleaning brush cavity positioned on the right side of the cleaning cavity is arranged in the machine body, the cleaning brush cavity is communicated with the cleaning cavity through an adjusting cavity, the right end of the second electric slide rail extends into the cleaning brush cavity through the adjusting cavity, a fifth slide groove is arranged on the front wall and the rear wall of the cleaning brush cavity, a bottom plate is arranged on the fifth slide groove in a sliding manner, a plurality of second magnets are arranged at the upper end of the bottom plate, a cleaning rod is fixedly arranged on the second magnets, scraping ports are symmetrically arranged on the cleaning rod, a sixth slide groove is arranged in the cleaning rod, a scraping plate is arranged on the sixth slide groove in a sliding manner, a fourth spring is connected between the scraping plate and the cleaning rod, a seventh slide groove is arranged in the cleaning rod, a pushing block is arranged on the seventh slide groove in a sliding manner, and a fifth spring is connected between the pushing block and the inlet, be equipped with the entry in the clearance stick, the entry lower extreme is equipped with the electronic slide rail of third, the electronic slide rail of third goes up to slide and is equipped with closed piece, closed piece can control the switch of entry, be equipped with first thread groove on the clearance brush chamber diapire, it is equipped with first threaded rod to rotate on the first thread groove, the fixed first long gear that is equipped with on the first threaded rod, the fixed second roof that is equipped with on the first long gear, the second roof with the bottom plate offsets, be equipped with push motor in the clearance brush chamber diapire, push motor upper end power is connected with the motor shaft, fixed be equipped with on the motor shaft with the first gear of first long gear meshing.
2. The device for cleaning the speaker hole of the mobile phone according to claim 1, wherein: the upper side of the cleaning cavity is provided with a closed door, the closed door is connected with the machine body through a second hinged shaft, and the closed door can control the opening and closing of the inlet.
3. The device for cleaning the speaker hole of the mobile phone according to claim 2, wherein: and a handle is arranged on the upper side of the closed door, and the closed door can be driven to rotate along the second hinge connecting shaft by pulling the handle.
4. The device for cleaning the speaker hole of the mobile phone according to claim 1, wherein: adjustment mechanism including the symmetry set up in second thread groove in the adjustment chamber back wall, it is equipped with the second threaded rod to rotate on the second thread groove, the fixed second long gear that is equipped with on the second threaded rod, the fixed second push pedal that is equipped with on the second threaded rod, the clearance chamber with be connected with the trachea between the adjustment chamber, the second push pedal extends to in the trachea, the symmetry rotates in the adjustment chamber back wall and is equipped with the gear shaft, fixed being equipped with on the gear shaft with the second long gear meshing's second gear, it is equipped with the axis of rotation to rotate on the adjustment chamber back wall, the axis of rotation is fixed be equipped with the third gear of second gear meshing, the axis of rotation rear end extends to the external world and fixed block that is equipped with.
5. The device for cleaning the speaker hole of the mobile phone according to claim 1, wherein: the clamping block is provided with a sponge cushion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010902419.1A CN112044822A (en) | 2020-09-01 | 2020-09-01 | Cell-phone speaker hole cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010902419.1A CN112044822A (en) | 2020-09-01 | 2020-09-01 | Cell-phone speaker hole cleaning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112044822A true CN112044822A (en) | 2020-12-08 |
Family
ID=73608446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010902419.1A Withdrawn CN112044822A (en) | 2020-09-01 | 2020-09-01 | Cell-phone speaker hole cleaning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112044822A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112671963A (en) * | 2021-01-18 | 2021-04-16 | 东莞市迈能达自动化科技有限公司 | Cell-phone part earphone ash removal device with adjust structure |
-
2020
- 2020-09-01 CN CN202010902419.1A patent/CN112044822A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112671963A (en) * | 2021-01-18 | 2021-04-16 | 东莞市迈能达自动化科技有限公司 | Cell-phone part earphone ash removal device with adjust structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20201208 |