CN109568979A - A kind of miniature finger gyro convolution aircraft - Google Patents
A kind of miniature finger gyro convolution aircraft Download PDFInfo
- Publication number
- CN109568979A CN109568979A CN201910090769.XA CN201910090769A CN109568979A CN 109568979 A CN109568979 A CN 109568979A CN 201910090769 A CN201910090769 A CN 201910090769A CN 109568979 A CN109568979 A CN 109568979A
- Authority
- CN
- China
- Prior art keywords
- aircraft
- main body
- body cover
- cover
- pcb board
- 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.)
- Pending
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Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63H—TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
- A63H27/00—Toy aircraft; Other flying toys
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63H—TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
- A63H33/00—Other toys
- A63H33/18—Throwing or slinging toys, e.g. flying disc toys
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63H—TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
- A63H1/00—Tops
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63H—TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
- A63H29/00—Drive mechanisms for toys in general
- A63H29/22—Electric drives
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- Toys (AREA)
Abstract
The present invention relates to a kind of miniature finger gyro convolution aircraft, including main body cover, finger pressure upper cover, finger pressure lower cover, driving part, fan blade, mandrel, infrared emission component, receiving unit and power supply, finger pressure upper cover and finger pressure lower cover are respectively provided at the upper and lower end face of main body cover, fan blade, driving part, power supply, infrared emission component and receiving unit are each provided in main body cover, mandrel is threaded through main body cover, finger pressure upper cover, in the centre bore of finger pressure lower cover and fan blade, main body cover, finger pressure upper cover, finger pressure lower cover and fan blade are rotated by axle center of mandrel, driving part is connected with main body cover, driving part and fan blade are sequentially connected, driving part, infrared emission component and receiving unit are electrically connected with the power supply respectively.
Description
Technical field
The present invention relates to toy aircraft technical field, espespecially a kind of miniature finger gyro convolution aircraft.
Background technique
As people are to the pay attention to day by day of Intelligent life, the various the relevant technologies of aerodynamic vehicle obtain in the field of toys
To being widely applied, various types of Intelligent flight toys are createed, in the prior art, toy aircraft playability on the market
Insufficient disadvantage, limits the popularization of toy aircraft.
Summary of the invention
To solve the above problems, the present invention provides a kind of interactive strong with playability, portable miniature finger gyro
Circle round aircraft.
To achieve the above object, the present invention, which adopts the following technical scheme that, is: a kind of miniature finger gyro convolution aircraft,
Including main body cover, fan blade is equipped in shell outside the main body, is equipped with mandrel at the center of fan blade, the mandrel both ends, which are run through, finger pressure
Upper cover, finger pressure lower cover, the finger pressure upper cover, finger pressure lower cover are respectively provided at main body cover two sides up and down, on main body cover, finger pressure
Lid, finger pressure lower cover can individually be rotated using mandrel as the center of circle, and motor and power supply, power supply and motor are equipped in the main body cover
It is electrically connected, motor is connected with main body cover, and the rotor of motor is connected by reducing gear and fan blade.
After turning on the power switch, player pinches finger pressure upper cover, finger pressure lower cover by finger, stirs main body cover rotation, interior
The attitude transducer in portion detects enabling signal, and MCU, which issues instruction, makes electric motor starting, drives main body cover is opposite with fan blade to turn
It is dynamic, it throws away manually, while different flight experiences can be obtained, using the object for appreciation of such as flying disc by different angle of shot
Method realizes that aircraft circles round automatically, the effect that can be recycled automatically after dishing out.After opening power supply, rotor passes through deceleration
Tooth and fan blade linkage, motor and main body cover are installed together linkage；The movement steering of fan blade and main body cover is on the contrary, false wind
Leaf rotates clockwise, and main body cover is then counterclockwise, and the torsion that the two generates is opposite and cancels out each other, and main body cover and fan blade are simultaneously
Downward wind-force is generated, so that aircraft be made to generate lift.Using single motor as power, product cost is effectively reduced.
Wherein, fan blade shape is made in the main bone in the longitudinal direction of the main body cover, and when the motor rotates, main body cover rotation generates
Downward wind-force.
Wherein, be equipped with infrared emission component and receiving unit in the main body cover, the infrared emission component and
Receiving unit is electrically connected with the power supply respectively.
Wherein, the infrared emission component is located on upper casing and lower casing outer ring edge, and the infrared emission component includes upper
Emitting lid, lower transmitting lid, upper transmitter, lower transmitter and infrared pcb board, the upper transmitting lid engages under covering with lower transmitting,
The upper transmitter is located in transmitting lid, and the lower transmitter is located in lower transmitting lid, and the infrared pcb board is located at transmitting
Between lid and lower transmitting lid, the infrared pcb board is electrically connected with the power supply.
Wherein, the receiving unit is located inside upper casing, and the receiving unit includes receiving pcb board and receiver, described
The lower section that pcb board is located at driving part is received, the reception pcb board is electrically connected with the power supply, and the receiver, which is located at, receives PCB
It is electrically connected on plate and with pcb board is received, the reception pcb board is equipped with MCU main control chip, attitude transducer gyroscope and gas
Pressure sensor, the MCU main control chip are electrically connected with upper transmitter and lower transmitter.
Wherein, the driving part includes motor cabinet, motor, driving gear and reduction gearing, the motor cabinet and main body
Cage connection, the motor are located in motor cabinet and are connected with main body cover, and the driving gear is located on motor, described
Reduction gearing is connect with fan blade, and the driving gear is engaged with reduction gearing.
Wherein, the main body cover includes upper casing and lower casing, and the upper casing is detachably connected with lower casing.
It wherein, further include a glass scholar, the cup scholar is located at the top of lower cover.
A kind of flight path control method of miniature finger gyro convolution aircraft, power supply opening return miniature finger gyro
It revolves aircraft and starts standby mode, rotate main body cover, MCU main control chip detects the angle speed that attitude transducer gyroscope is sent out
Variable signal is spent, MCU main control chip, which will issue, instructs starting driving part；When operator dishes out the convolution flight of miniature finger gyro
After device, the data that MCU main control chip sends over real-time reception attitude transducer gyroscope and baroceptor pass through quaternary
The fixed high algorithm of number fusion air pressure, real-time resolving goes out the flight attitude of aircraft, and adjusts motor output control by pid algorithm
PWM, so that the flight attitude of aircraft is adjusted, to reach the control of flight path.Quaternary number belongs to higher mathematics category, is meter
Data of tri- axis of object XYZ with respect to earth absolute coordinate are calculated, air pressure is merged by Z axis, the absolute altitude of object can be calculated,
The speed of motor speed is controlled by the PWM of MCU output, and PWM is the meaning of pulse duty factor.
The beneficial effects of the present invention are: the configuration of the present invention is simple can use, also when a common electronic finger gyro
It can be used when a small aircraft, solve traditional finger tip gyro or the single playing method of aircraft, realize miniature finger gyro convolution
Various playing method of aircraft, is beneficial to the popularization of aircraft.Using single motor as power source, product cost is effectively reduced, it is whole
Body is compact-sized, is convenient for carrying；It can be realized miniature finger gyro convolution aircraft by aircraft mechanical structural to spin in the air,
The gesture that can also be flown according to the throwing of player, realizes different sporting flying tracks, and player is readily available automatic flight convolution
Effect, thus largely improve product interactivity and playability.While playability improves, handling optimization letter
It is single, interactivity enhancing.
Detailed description of the invention
Fig. 1 is top view of the invention.
Fig. 2 is detonation configuration figure of the invention.
Fig. 3 is of the invention to follow module principle figure.
Fig. 4 is action flow chart of the invention.
Description of symbols: 1. main body covers；11. upper casing；12. lower casing；21. finger pressure upper cover；22. finger pressure lower cover；3. wind
Leaf；4. driving part；41. motor cabinet；42. motor；43. driving gear；44. reduction gearing；5. infrared emission component；On 51.
Transmitting lid；52. lower transmitting lid；Transmitter on 53.；54. lower transmitter；55. infrared pcb board；6. receiving unit；61. receiver；
62. receiving pcb board；7. power supply；8. mandrel；9. glass scholar.
Specific embodiment
It please refers to shown in Fig. 1-2, the present invention is circled round aircraft about a kind of miniature finger gyro, including main body cover 1, is referred to
Press upper cover 21, finger pressure lower cover 22, driving part 4, fan blade 3, mandrel 8, infrared emission component 5, receiving unit 6, power supply 7 and cup scholar
9, the mandrel 8 passes through the centre bore of main body cover 1, finger pressure upper cover 21, finger pressure lower cover 22 and fan blade 3, the finger pressure upper cover 21
It is located at the lower end of main body cover 1, the finger pressure lower cover 22 is located at the upper end of main body cover 1, and the mandrel 8 is threaded through finger pressure upper cover
21, main body cover 1, fan blade 3 are consolidated in finger pressure lower cover 22 and by main body cover 1, finger pressure upper cover 21, finger pressure lower cover 22 and fan blade 3
Fixed concatenation, the cup scholar 9 are located on finger pressure lower cover 22, and the cup scholar 9 is cylindrical liner, further fix the same of finger pressure lower cover 22
When, the lifting operations of aircraft are played with certain collision prevention function, the driving part 4, infrared emission component 5, receiving unit 6
It is each provided in main body cover 1 with power supply 7, the driving part 4 is connected with main body cover 1, the driving part 4 and fan blade
3 transmission connections, the driving part 4, infrared emission component 5 and receiving unit 6 are electrically connected with power supply 7 respectively, on startup
Main body cover 1, finger pressure upper cover 21, finger pressure lower cover 22 are made rotating motion with fan blade 3 with mandrel 8 for the center of circle.
The main body cover 1 includes upper casing 11 and lower casing 12, and the periphery of the upper casing 11 is equipped with fixture block, the lower casing 12
Periphery is equipped with card hole, and the upper casing 11 is with lower casing 12 by fixture block and the fastening of card hole to be detachably connected, the upper casing 11
The main bone in longitudinal direction with lower casing 12 is 3 shape structure of fan blade, and fan blade 3 is located between upper casing 11 and lower casing 12, fan blade 3 and main body cover 1
Generate downward wind-force simultaneously when rotated.
Preferably, the infrared emission component 5 is located at 4 top of driving part, and the infrared emission component 5 includes upper transmitting
Lid 51, lower transmitting lid 52, upper transmitter 53, lower transmitter 54 and infrared pcb board 55, the upper transmitting lid 51 and lower transmitting lid 52
Engaging up and down, the upper transmitter 53 are located in transmitting lid 51, and the lower transmitter 54 is located in lower transmitting lid 52, described red
Outer pcb board 55 is located between transmitting lid 51 and lower transmitting lid 52, the infrared pcb board 55 and the electric connection of power supply 7, it is described on
Transmitter 53 and lower transmitter 54 are infrared emission tube, and the upper transmitting tube and lower transmitting tube are equipped with opening, described infrared
The infrared ray that line transmitting tube issues transmits away from opening, realizes the directive property of infrared ray, dissipate infrared ray will not outside.
Preferably, the receiving unit 6 is located at the lower section of driving part 4, and the receiving unit 6 includes receiving pcb board 62
With receiver 61, the lower section for receiving pcb board 62 and being located at driving part 4, the reception pcb board 62 is electrically connected with power supply 7,
The receiver 61 is infrared receiver sensor, and infrared receiver sensor is located on pcb board and is electrically connected with pcb board, described
Receive pcb board 55 be equipped with MCU main control chip, attitude transducer gyroscope and baroceptor, the MCU main control chip with it is upper
Transmitter and lower transmitter are electrically connected.
Preferably, the driving part 4 includes motor cabinet 41, motor 42, driving gear 43 and reduction gearing 44, the electricity
Base 41 is connect with upper casing 11, and the motor 42 is located in motor cabinet 41 and is connected with upper casing 11, the driving gear 43
It is located on motor 42, the reduction gearing 44 is connect by transmission shaft with fan blade 3, and the driving gear 43 is nibbled with reduction gearing 44
It closes, the motor 42 is electrically connected with power supply 7 and MCU main control chip respectively.
It is of the invention infrared to follow module working principle: as shown in figure 3, infrared emission component 5 formed with receiving unit 6 it is red
Module is followed outside, and the I/O port 1 of the MCU main control chip of infrared pcb board 55 controls two infrared transmitting tubes, exports the coding of 38KHz
Signal, the power supply of infrared transmitting tube are stable VDD, and the current-limiting resistance of infrared emission is fixed resistance value, it can be deduced that transmitting letter
Number transmission power intensity be stable；The AD pin I/O port 2 of the MCU main control chip of infrared pcb board 55 acquires infrared receiver sense
Device signal pins voltage is answered, in the absence of reflecting surface, infrared receiver sensor is in off state, the I/O port 2 of MCU main control chip
The voltage of detection is VDD, and in the presence of reflecting surface, reflecting surface follows closer at a distance from mould group with infrared, and the signal of reflection is got over
By force, infrared receiver sensor conducts rate is higher, and the voltage detected of I/O port 2 is lower；Conversely, reflecting surface with follow mould group away from
From remoter, the signal of reflection is weaker, and infrared receiver sensor conducts rate is lower, and the voltage detected of I/O port 2 is higher, to sum up
It is described, the presence or absence of reflecting surface can be can be determined that by the voltage detected of I/O port 2, if can pass through in the presence of reflecting surface
The voltage change of IO2 detects that the distance between main body aircraft and reflecting surface change；Aircraft can become according to relevant level
Change and corresponding makes following of rising or falling or push movement.
It please refers to shown in Fig. 4, operating principle of the invention are as follows: player pinches finger pressure upper cover 21 and finger pressure lower cover by finger
22, it is fixed on this aircraft on hand, opens power supply 7 and switch, system is in standby, and finger rotates aircraft, and posture passes
Sensor gyroscope detects enabling signal, and MCU main control chip driving motor 42 rotates, and 42 own rotation of motor drives main body cover
1 rotation, motor 42 drive fan blade 3 to rotate by driving gear 43 and reduction gearing 44, main body cover 1 and fan blade turn on the contrary,
Main body cover 1 and fan blade 3 relatively rotate the torsion generated and cancel out each other and generate downward wind-force simultaneously, to make this aircraft
Lift, the gesture dished out according to user are generated, attitude transducer gyroscope detects that relevant throwing is flown work, MCU master control core
Piece makes attitude algorithm by the data that attitude transducer gyroscope and baroceptor acquire, and it is fixed to merge air pressure by quaternary number
High algorithm, real-time resolving goes out the flight attitude of aircraft, and adjusts motor output control PWM by pid algorithm, to adjust
The flight attitude of aircraft, to reach the control of flight path.Quaternary number belongs to higher mathematics category, is to calculate object XYZ tri-
Axis merges air pressure by Z axis, can calculate the absolute altitude of object with respect to the data of earth absolute coordinate, motor speed
Speed is controlled by the PWM of MCU output, and PWM is the meaning of pulse duty factor, in flight course, infrared emission component 5 with
The infrared of the composition of receiving unit 6 follows module to run, and issues different signal feedbacks to MCU chip, in fact according to different situations
Now follow interaction.
Product cost, compact overall structure, side is effectively reduced using single motor as power source in the configuration of the present invention is simple
Portable belt；By the cooperation between built-in infrared emission component 5, receiving unit 6 and driving part 4, aircraft can be realized
Aerial spin, the function of incuding obstacle, additionally it is possible to according to the winged gesture of the throwing of player, realize different sporting flying tracks, it can
While object for appreciation property improves, handling optimization is simple, and interactivity enhancing is beneficial to the popularization of aircraft.
Embodiment of above be only preferred embodiments of the present invention will be described, not to the scope of the present invention into
Row limits, and without departing from the spirit of the design of the present invention, this field ordinary engineering and technical personnel is to technical side of the invention
The various changes and improvements that case is made, should fall within the scope of protection determined by the claims of the present invention.
Claims (9)
- Aircraft, including main body cover 1. a kind of miniature finger gyro circles round, are equipped with fan blade, in fan blade outside the main body in shell The heart is equipped with mandrel, it is characterised in that: the mandrel both ends finger pressure upper cover and refer to through having a finger pressure upper cover and finger pressure lower cover Pressure lid is respectively provided at main body cover two sides up and down, is equipped with driving part and power supply, power supply and driving in the main body cover Component is electrically connected, and driving part is connected with main body cover, and the rotor and fan blade of driving part are connected.
- The aircraft 2. miniature finger gyro according to claim 1 circles round, it is characterised in that: the main body cover is indulged Fan blade shape is made to main framing.
- The aircraft 3. miniature finger gyro according to claim 1 circles round, it is characterised in that: set in the main body cover There are infrared emission component and receiving unit, the infrared emission component and receiving unit are electrically connected with the power supply respectively.
- The aircraft 4. miniature finger gyro according to claim 3 circles round, it is characterised in that: the infrared emission component packet Transmitting lid, lower transmitting lid, upper transmitter, lower transmitter and infrared pcb board are included, the upper transmitting lid covers lower card with lower transmitting It closes, the upper transmitter is located in transmitting lid, and the lower transmitter is located in lower transmitting lid, and the infrared pcb board is located at Between transmitting lid and lower transmitting lid, the infrared pcb board is electrically connected with the power supply.
- The aircraft 5. miniature finger gyro according to claim 3 circles round, it is characterised in that: the receiving unit is located at Inside shell, the receiving unit includes receiving pcb board and receiver, and the lower section for receiving pcb board and being located at driving part is described It receives pcb board to be electrically connected with the power supply, the receiver, which is located at, to be received on pcb board and be electrically connected with pcb board is received, described to connect It receives pcb board and is equipped with MCU main control chip, attitude transducer gyroscope and baroceptor, the MCU main control chip and infrared hair Penetrate component electric connection.
- The aircraft 6. miniature finger gyro according to claim 1 circles round, it is characterised in that: the driving part includes electricity Base, motor, driving gear and reduction gearing, the motor cabinet are fixed on main body cover, and the motor is located in motor cabinet And be connected with main body cover, the driving gear is located on motor, and the reduction gearing is connect with fan blade, the sliding tooth Wheel is engaged with reduction gearing.
- The aircraft 7. miniature finger gyro according to claim 1 circles round, it is characterised in that: the main body cover includes upper Shell and lower casing, the upper casing are detachably connected with lower casing.
- The aircraft 8. miniature finger gyro according to claim 1 circles round, it is characterised in that: further include a glass scholar, the cup Scholar is located at the top of lower cover.
- 9. a kind of flight path control method of miniature finger gyro convolution aircraft, it is characterised in that: power supply opening makes miniature Finger gyro convolution aircraft starts standby mode, rotates main body cover, MCU main control chip detects attitude transducer gyroscope The angular speed variable signal of submitting, MCU main control chip, which will issue, instructs starting driving part；When operator dishes out miniature finger top Spiral shell circles round after aircraft, the number that MCU main control chip sends over real-time reception attitude transducer gyroscope and baroceptor According to by the fixed high algorithm of quaternary number fusion air pressure, real-time resolving goes out the flight attitude of aircraft, and passes through pid algorithm and adjust Motor output control PWM, so that the flight attitude of aircraft is adjusted, to reach the control of flight path.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910090769.XA CN109568979A (en) | 2019-01-29 | 2019-01-29 | A kind of miniature finger gyro convolution aircraft |
| US16/699,136 US20200238188A1 (en) | 2019-01-29 | 2019-11-29 | Miniature Finger Gyro Boomerang |
| CN202020067295.5U CN211935580U (en) | 2019-01-29 | 2020-01-13 | Miniature finger top rotary aircraft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910090769.XA CN109568979A (en) | 2019-01-29 | 2019-01-29 | A kind of miniature finger gyro convolution aircraft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109568979A true CN109568979A (en) | 2019-04-05 |
Family
ID=65918279
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910090769.XA Pending CN109568979A (en) | 2019-01-29 | 2019-01-29 | A kind of miniature finger gyro convolution aircraft |
| CN202020067295.5U Active CN211935580U (en) | 2019-01-29 | 2020-01-13 | Miniature finger top rotary aircraft |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020067295.5U Active CN211935580U (en) | 2019-01-29 | 2020-01-13 | Miniature finger top rotary aircraft |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US20200238188A1 (en) |
| CN (2) | CN109568979A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110124327A (en) * | 2019-04-25 | 2019-08-16 | 东莞市宏旺电子科技有限公司 | Flight finger tip gyro |
| WO2020215946A1 (en) * | 2019-04-25 | 2020-10-29 | 东莞市宏旺电子科技有限公司 | Flying fidget spinner |
| WO2021208788A1 (en) * | 2020-04-17 | 2021-10-21 | 东莞市特斯迈电子科技有限公司 | Rotary flying ball |
| USD1001009S1 (en) | 2021-06-09 | 2023-10-10 | Amax Group Usa, Llc | Quadcopter |
| USD1003214S1 (en) | 2021-06-09 | 2023-10-31 | Amax Group Usa, Llc | Quadcopter |
| USD1010004S1 (en) | 2019-11-04 | 2024-01-02 | Amax Group Usa, Llc | Flying toy |
| USD1035787S1 (en) | 2022-06-24 | 2024-07-16 | Amax Group Usa, Llc | Flying toy |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113908562B (en) * | 2021-11-15 | 2023-05-23 | 东南大学 | Shell alternate rotation type electrically driven gyroscope |
| USD983905S1 (en) * | 2022-09-21 | 2023-04-18 | Huasheng Chen | Flying orb ball toy |
| US11766623B1 (en) * | 2022-11-22 | 2023-09-26 | Huasheng Chen | Frisbee |
| USD1011458S1 (en) * | 2023-06-30 | 2024-01-16 | DongGuan Tesmai Electronic Technology Co., LTD | Flying toy |
-
2019
- 2019-01-29 CN CN201910090769.XA patent/CN109568979A/en active Pending
- 2019-11-29 US US16/699,136 patent/US20200238188A1/en not_active Abandoned
-
2020
- 2020-01-13 CN CN202020067295.5U patent/CN211935580U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110124327A (en) * | 2019-04-25 | 2019-08-16 | 东莞市宏旺电子科技有限公司 | Flight finger tip gyro |
| WO2020215946A1 (en) * | 2019-04-25 | 2020-10-29 | 东莞市宏旺电子科技有限公司 | Flying fidget spinner |
| CN110124327B (en) * | 2019-04-25 | 2024-03-22 | 东莞市宏旺电子科技有限公司 | Flying finger tip top |
| USD1010004S1 (en) | 2019-11-04 | 2024-01-02 | Amax Group Usa, Llc | Flying toy |
| WO2021208788A1 (en) * | 2020-04-17 | 2021-10-21 | 东莞市特斯迈电子科技有限公司 | Rotary flying ball |
| USD1001009S1 (en) | 2021-06-09 | 2023-10-10 | Amax Group Usa, Llc | Quadcopter |
| USD1003214S1 (en) | 2021-06-09 | 2023-10-31 | Amax Group Usa, Llc | Quadcopter |
| USD1035787S1 (en) | 2022-06-24 | 2024-07-16 | Amax Group Usa, Llc | Flying toy |
Also Published As
| Publication number | Publication date |
|---|---|
| CN211935580U (en) | 2020-11-17 |
| US20200238188A1 (en) | 2020-07-30 |
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| PB01 | Publication | ||
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Application publication date: 20190405 |