CN211881068U - Grass cutter - Google Patents
Grass cutter Download PDFInfo
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- CN211881068U CN211881068U CN202020428539.8U CN202020428539U CN211881068U CN 211881068 U CN211881068 U CN 211881068U CN 202020428539 U CN202020428539 U CN 202020428539U CN 211881068 U CN211881068 U CN 211881068U
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- gear
- cutter teeth
- shaft
- worm
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Abstract
The utility model provides a mower, which comprises a movable frame, a driving mechanism and a plurality of blades; the driving mechanism is fixed on the movable frame, is provided with a plurality of output ends and is arranged at equal intervals along the preset direction, the rotating speed of each output end is the same, and the rotating directions of the adjacent output ends are opposite; the blades are in one-to-one correspondence with the output ends and are arranged at the same height, each blade comprises a fixed disc and a plurality of cutter teeth, the fixed disc is fixed on the corresponding output end, and the cutter teeth are uniformly arranged along the circumferential direction of the fixed disc and are fixed on the edge of the fixed disc; the cutter teeth on the same fixed disk: a first interval is arranged between the adjacent cutter teeth; in adjacent blades: the cutter teeth of one blade correspond to the first intervals of the other blade one by one, and the cutter teeth rotate along with the fixed disc fixed by the cutter teeth to be positioned in or separated from the corresponding first intervals, so that the mowing range of the mower is improved without increasing the size of the blade.
Description
Technical Field
The utility model belongs to the technical field of mow, more specifically say, relate to a lawn mower.
Background
A lawn mower is a mechanical tool used to trim lawns, vegetation, and the like. Generally, a lawn mower includes a moving frame, a drive motor, and a blade. The driving motor is fixed on the movable frame, and the blade is fixed on an output shaft of the driving motor. The output shaft of the driving motor drives the blade to rotate rapidly to cut. However, the cutting range of the lawn mower is determined by the size of the blade, and when a user mows a lawn having a large area, the user needs to use the blade having a large size to improve the work efficiency.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a lawn mower to solve the cutting scope of the lawn mower that exists among the prior art and by the size decision of blade, the user need use the technical problem that great large-size blade improves work efficiency when mowing to the great lawn of area.
In order to achieve the above object, the utility model adopts the following technical scheme: providing a mower comprising a mobile frame, a drive mechanism and a plurality of blades;
the driving mechanism is fixed on the movable frame, is provided with a plurality of output ends and is arranged at equal intervals along a preset direction, the rotating speed of each output end is the same, and the rotating directions of the adjacent output ends are opposite;
the blades are in one-to-one correspondence with the output ends and are arranged in equal height, each blade comprises a fixed disc and a plurality of cutter teeth, the fixed disc is fixed on the corresponding output end, and the cutter teeth are uniformly arranged along the circumferential direction of the fixed disc and are fixed on the edge of the fixed disc;
the cutter teeth are positioned on the same fixed disc: a first interval is arranged between the adjacent cutter teeth;
in adjacent said blades: the cutter teeth of one blade correspond to the first intervals of the other blade one by one, and the cutter teeth rotate along with the fixed disc fixed by the cutter teeth to be located in or separated from the corresponding first intervals.
Further, the driving mechanism comprises a mounting seat, a driving motor, a rotating shaft and a linkage assembly;
the mounting seat is used for being fixed on the movable frame;
the driving motor is fixed on the mounting seat;
the rotating shafts are set as the output ends of the driving mechanisms, and each rotating shaft is rotatably connected to the mounting seat;
the fixed disks are fixed on the corresponding rotating shafts;
the linkage assembly is connected to the output shaft of the driving motor and the rotating shaft and is used for transmitting the power of the output shaft of the driving motor to the rotating shaft.
Further, the number of the rotating shafts is two, and the linkage assembly comprises a first gear, a second gear, a third gear and a fourth gear;
the first gear is coaxially connected to an output shaft of the driving motor;
the second gear is rotatably connected to the mounting seat and meshed with the first gear;
the third gear is coaxially connected to the rotating shaft and meshed with the second gear;
the fourth gear is coaxially connected to the other rotating shaft and meshed with the first gear.
Furthermore, the number of the rotating shafts is three, and the linkage assembly comprises a worm, a first worm wheel, a second worm wheel and a third worm wheel;
the worm is rotationally connected to the mounting seat, one end of the worm is fixed on an output shaft of the driving motor, the worm is provided with a first threaded part, a second threaded part and a third threaded part which are distributed along the length direction of the worm, the thread direction of the first threaded part is opposite to that of the second threaded part, and the thread direction of the first threaded part is the same as that of the third threaded part;
the first turbine, the second turbine and the third turbine are respectively coaxially connected to the rotating shaft;
the first worm wheel is meshed with the first threaded part;
the second worm wheel is meshed with the second threaded part;
the third worm gear is engaged with the third threaded portion.
Furthermore, the mower also comprises inserting shafts in one-to-one correspondence with the output ends and fixing pieces in one-to-one correspondence with the fixed discs;
each output end is provided with an inserting groove;
the inserting shaft is inserted into the inserting groove corresponding to the output end, and one end of the inserting shaft is fixed on the corresponding fixed disc;
the fixing piece penetrates through the corresponding fixed disc, and is in threaded connection with the corresponding plug-in shaft and the output end.
Furthermore, each output end is provided with a positioning groove;
on the same output: one side of the positioning groove penetrates through the insertion groove;
the mower further comprises positioning blocks, the positioning blocks correspond to the inserting shafts one by one and are fixed on the corresponding inserting shafts, the inserting shafts are inserted into the corresponding inserting grooves, and the positioning blocks are clamped in the positioning grooves of the inserting shafts.
Furthermore, the cutter teeth comprise a connecting piece and a cutting piece, the connecting piece is provided with a first end and a second end, the first end is fixed on the fixed disc, the cutting piece is provided with an outer convex arc-shaped cutting edge, and one side, far away from the outer convex arc-shaped cutting edge, of the cutting piece is fixed on the second end.
The utility model provides a pair of lawn mower's beneficial effect lies in: compared with the prior art, a plurality of output ends of the driving mechanism drive the corresponding blades to rotate, so that the blades can be conveniently and simultaneously cut. A plurality of outputs set up along predetermineeing the direction equidistance, so a plurality of blades set up along predetermineeing the direction, and the user of being convenient for observes the cutting condition of a plurality of blades to the meadow in the one side of predetermineeing the direction to the convenient cutting direction of adjusting lawn mower. The adjacent blades rotate in opposite directions due to the opposite rotation of adjacent outputs. Because the rotating direction of one blade is opposite to that of the other blade in the adjacent blades, and the cutter teeth are separated from the fixed disc or positioned at the corresponding first intervals along with the fixed disc in the rotating process of the adjacent blades, the adjacent blades cannot generate an interference phenomenon in the rotating process, and the normal rotation of the blades is ensured. When the cutter teeth are positioned at the corresponding first intervals, the interval between the two adjacent blades is small, so that the grass positioned between the two adjacent blades can be cut conveniently, and the grass on the area where the blades pass is cut smoothly and rapidly.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic view of a partial explosion structure of a mower according to an embodiment of the present invention;
fig. 2 is a first schematic structural view of the mower provided with two blades according to the embodiment of the present invention;
fig. 3 is a schematic structural view ii of the lawn mower provided by the embodiment of the present invention with two blades;
fig. 4 is a first schematic structural view of the mower provided by the embodiment of the present invention with three blades;
fig. 5 is a second schematic structural view of the lawn mower provided by the embodiment of the present invention with three blades;
fig. 6 is an enlarged schematic view of a portion a in fig. 5.
Wherein, in the figures, the respective reference numerals:
1. a drive mechanism; 11. a mounting seat; 12. a drive motor; 13. a rotating shaft; 14. a linkage assembly; 141. a first gear, 142, a second gear; 143. a third gear; 144. a fourth gear; 145. a worm; 1451. a first threaded portion; 1452. a second threaded portion; 1453. a third threaded portion; 146. a first turbine; 147. a second turbine; 148. a third turbine; 15. inserting grooves; 16. positioning a groove; 2. a blade; 21. fixing the disc; 22. cutter teeth; 221. connecting sheets; 2211. a first end; 2212. a second end; 222. cutting the slices; 2221. an outwardly convex arc-shaped cutting edge; 23. a first interval; 3. a movable frame; 4. a plug shaft; 5. a fixing member; 6. and (5) positioning the blocks.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1, 2 and 3 together, a description will now be given of a lawn mower according to the present invention. A mower comprises a moving frame 3, a driving mechanism 1 and a plurality of blades 2;
the driving mechanism 1 is fixed on the movable frame 3, is provided with a plurality of output ends and is arranged at equal intervals along a preset direction, the rotating speed of each output end is the same, and the rotating directions of adjacent output ends are opposite;
each blade 2 corresponds to the output end one by one and is arranged at the same height, each blade 2 comprises a fixed disc 21 and a plurality of cutter teeth 22, the fixed disc 21 is fixed on the corresponding output end, and the cutter teeth 22 are uniformly arranged along the circumferential direction of the fixed disc 21 and fixed on the edge of the fixed disc 21;
in the adjacent blade 2: the cutter teeth 22 of one blade 2 correspond to the first intervals 23 of the other blade 2 one by one, and the cutter teeth 22 rotate along with the fixed disc 21 fixed by the cutter teeth to be positioned in or separated from the corresponding first intervals 23.
The utility model provides a pair of lawn mower, compared with the prior art, a plurality of outputs of actuating mechanism 1 drive the blade 2 rotation that corresponds, are convenient for a plurality of blades 2 cut simultaneously. A plurality of outputs set up along predetermineeing the direction equidistance, so a plurality of blades 2 set up along predetermineeing the direction, and the user of being convenient for observes the cutting condition of a plurality of blades 2 to the meadow in the one side of predetermineeing the direction to the convenient cutting direction of adjusting lawn mower. The adjacent blades 2 rotate in opposite directions due to the opposite rotation direction of the adjacent output ends. Because the rotation direction of one blade 2 is opposite to that of the other blade 2 in the adjacent blades 2, and the cutter teeth 22 are separated from or positioned at the corresponding first intervals 23 along with the fixed disks 21 fixed by the adjacent blades 2 in the rotation process, the adjacent blades 2 do not interfere in the rotation process, and the normal rotation of the blades 2 is ensured. Since the blade teeth 22 are located at the corresponding first spaces 23, the spaces between the adjacent two blades 2 are small, which facilitates cutting off the grass located between the adjacent two blades 2, thereby making the grass quickly cut and even on the area where the plurality of blades 2 pass.
Further, referring to fig. 1, fig. 2 and fig. 3 together, as a specific embodiment of the present invention, the driving mechanism 1 includes a mounting base 11, a driving motor 12, a rotating shaft 13 and a linkage assembly 14;
the mounting seat 11 is used for being fixed on the movable frame 3;
the driving motor 12 is fixed on the mounting base 11;
the rotating shafts 13 are used as output ends of the driving mechanism 1, and each rotating shaft 13 is rotatably connected to the mounting seat 11;
the fixed disks 21 are fixed on the corresponding rotating shafts 13;
the linkage assembly 14 is connected to the output shaft of the driving motor 12 and the rotating shaft 13, and serves to transmit power of the output shaft of the driving motor 12 to the rotating shaft 13.
The mounting seat 11 facilitates the connection of the driving motor 12, the rotating shaft 13 and the linkage assembly 14 on the moving frame 3, and improves the convenience of the driving motor 12, the rotating shaft 13 and the linkage assembly 14 on the moving frame 3. Through linkage assembly 14, a plurality of rotation axis 13 of single driving motor 12's output shaft drive simultaneously is rotatory, has reduced the quantity that driving motor 12 of this lawn mower set up, is favorable to reducing the manufacturing cost of lawn mower.
Specifically, each rotating shaft 13 is inserted into the mounting seat 11.
Further, referring to fig. 1, fig. 2 and fig. 3, as a specific embodiment of the lawn mower provided by the present invention, there are two rotating shafts 13, and the linkage assembly 14 includes a first gear 141, a second gear 142, a third gear 143 and a fourth gear 144;
the first gear 141 is coaxially connected to the output shaft of the driving motor 12;
the second gear 142 is rotatably connected to the mounting base 11 and meshed with the first gear 141;
the third gear 143 is coaxially connected to a rotary shaft 13 and engaged with the second gear 142;
the fourth gear 144 is coaxially connected to the other rotary shaft 13 and meshes with the first gear 141.
The driving motor 12 is turned on, the output shaft of the driving motor 12 drives the first gear 141 to rotate, and then the first gear 141 drives the second gear 142 to rotate, so that the second gear 142 drives the third gear 143 to rotate, and since the rotation direction of the first gear 141 is opposite to that of the second gear 142, the rotation direction of the third gear 143 is the same as that of the first gear 141; meanwhile, the first gear 141 drives the fourth gear 144 to rotate, so that the rotation direction of the fourth gear 144 is opposite to that of the first gear 141, and therefore the directions of the third gear 143 and the fourth gear 144 are opposite, so that the rotation direction of the rotating shaft 13 connected to the third gear 143 is opposite to that of the rotating shaft 13 connected to the fourth gear 144, that is, the rotation directions of adjacent blades 2 are opposite.
Specifically, the third gear 143 is connected to an end of the corresponding rotary shaft 13 away from the blade 2, and the fourth gear 144 is connected to an end of the corresponding rotary shaft 13 away from the blade 2.
Further, referring to fig. 4, 5 and 6, as a specific embodiment of the lawn mower provided by the present invention, there are three rotating shafts 13, and the linkage assembly 14 includes a worm 145, a first worm wheel 146, a second worm wheel 147 and a third worm wheel 148;
the worm 145 is rotatably coupled to the mounting base 11, and has one end fixed to an output shaft of the driving motor 12, the worm 145 has a first screw portion 1451, a second screw portion 1452, and a third screw portion 1453 distributed along a length direction thereof, a screw direction of the first screw portion 1451 is opposite to that of the second screw portion 1452, and a screw direction of the first screw portion 1451 is the same as that of the third screw portion 1453;
the first turbine 146, the second turbine 147 and the third turbine 148 are coaxially connected to a rotary shaft 13;
the first worm wheel 146 is engaged with the first threaded portion 1451;
the second turbine 147 is engaged with the second threaded portion 1452;
the third worm gear 148 is engaged with the third screw portion 1453.
The drive motor 12 is turned on, so that the output shaft of the drive motor 12 rotates the worm 145. The first threaded portion 1451 of the worm 145 controls the rotation of the first worm gear 146, the second threaded portion 1452 of the worm 145 controls the rotation of the second worm gear 147, and the third threaded portion 1453 of the worm 145 controls the rotation of the third worm gear 148. Since the thread directions of the first thread part 1451 and the second thread part 1452 are opposite, and the thread directions of the first thread part 1451 and the third thread part 1453 are the same, the rotation direction of the first turbine 146 is opposite to that of the second turbine 147, and the rotation direction of the first turbine 146 is the same as that of the third turbine 148, so that the rotation direction of the blade 2 driven by the first turbine 146 is opposite to that of the blade 2 driven by the second turbine 147, and the rotation direction of the blade 2 driven by the first turbine 146 is the same as that of the blade 2 driven by the third turbine 148, thereby realizing that the rotation directions of the adjacent blades 2 are opposite.
Specifically, the first turbine 146 is connected to an end of the corresponding rotary shaft 13 away from the blade 2, the second turbine 147 is connected to an end of the corresponding rotary shaft 13 away from the blade 2, and the third turbine 148 is connected to an end of the corresponding rotary shaft 13 away from the blade 2.
Further, referring to fig. 1, as a specific embodiment of the lawn mower provided by the present invention, the lawn mower further includes an inserting shaft 4 corresponding to the output end one to one and a fixing member 5 corresponding to the fixing disc 21 one to one;
each output end is provided with an inserting groove 15;
the inserting shaft 4 is inserted into the inserting groove 15 corresponding to the output end, and one end of the inserting shaft 4 is fixed on the corresponding fixed disc 21;
the fixing piece 5 is arranged in the corresponding fixed disc 21 in a penetrating way and is connected with the corresponding inserting shaft 4 and the output end in a threaded way.
The inserting shaft 4 is fixed on the fixed disc 21, so that the inserting shaft 4 is convenient to avoid the cutter teeth 22, and the cutter blade 2 is ensured to cut. The inserting shafts 4 are inserted into the corresponding inserting grooves 15, then the fixing pieces 5 corresponding to the inserting shafts 4 inserted into the inserting grooves 15 penetrate through the corresponding fixing discs 21, the fixing pieces 5 are in threaded connection with the corresponding inserting shafts 4 and in threaded connection with the corresponding output ends, and therefore the inserting shafts 4 are limited on the corresponding output ends, and the output ends are guaranteed to drive the corresponding blades 2 to rotate.
Further, referring to fig. 1, as a specific embodiment of the lawn mower provided by the present invention, each output end is provided with a positioning slot 16;
on the same output: one side of the positioning slot 16 penetrates through the insertion slot 15;
the mower further comprises positioning blocks 6, the positioning blocks 6 correspond to the plug shafts 4 one by one and are fixed on the corresponding plug shafts 4, the plug shafts 4 are plugged in the corresponding plug grooves 15, and the positioning blocks 6 are clamped in positioning grooves 16 of the plug shafts 4.
The design requirements of the mower are as follows: in the adjacent blade 2: the cutter teeth 22 of one blade 2 correspond to the first intervals 23 of the other blade 2 one by one, and the cutter teeth 22 are positioned in or separated from the corresponding first intervals 23, so that the spatial positions of the positioning grooves 16 arranged at each output end are different. The spatial position of the positioning groove 16 arranged at each output end is set according to the design requirement, so that after the inserting shaft 4 is inserted into the corresponding output end, the position between the adjacent blades 2 meets the design requirement of the mower, and the convenience for installing the blades 2 is improved.
Further, referring to fig. 1, as a specific embodiment of the present invention, the cutter tooth 22 includes a connecting piece 221 and a cutting blade 222, the connecting piece 221 has a first end 2211 and a second end 2212, the first end 2211 is fixed on the fixing disc 21, the cutting blade 222 has an outer convex arc-shaped cutting edge 2221, one side of the cutting blade 222 away from the outer convex arc-shaped cutting edge 2221 is fixed on the second end 2212, and the cutter tooth 22 has a simple structure and is very practical.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. A mower is characterized by comprising a moving frame, a driving mechanism and a plurality of blades;
the driving mechanism is fixed on the movable frame, is provided with a plurality of output ends and is arranged at equal intervals along a preset direction, the rotating speed of each output end is the same, and the rotating directions of the adjacent output ends are opposite;
the blades are in one-to-one correspondence with the output ends and are arranged in equal height, each blade comprises a fixed disc and a plurality of cutter teeth, the fixed disc is fixed on the corresponding output end, and the cutter teeth are uniformly arranged along the circumferential direction of the fixed disc and are fixed on the edge of the fixed disc;
the cutter teeth are positioned on the same fixed disc: a first interval is arranged between the adjacent cutter teeth;
in adjacent said blades: the cutter teeth of one blade correspond to the first intervals of the other blade one by one, and the cutter teeth rotate along with the fixed disc fixed by the cutter teeth to be located in or separated from the corresponding first intervals.
2. The mower of claim 1, wherein said drive mechanism comprises a mount, a drive motor, a rotatable shaft, and a linkage assembly;
the mounting seat is used for being fixed on the movable frame;
the driving motor is fixed on the mounting seat;
the rotating shafts are set as the output ends of the driving mechanisms, and each rotating shaft is rotatably connected to the mounting seat;
the fixed disks are fixed on the corresponding rotating shafts;
the linkage assembly is connected to the output shaft of the driving motor and the rotating shaft and is used for transmitting the power of the output shaft of the driving motor to the rotating shaft.
3. The lawnmower of claim 2, wherein the number of the rotating shafts is two, and the linkage assembly comprises a first gear, a second gear, a third gear, and a fourth gear;
the first gear is coaxially connected to an output shaft of the driving motor;
the second gear is rotatably connected to the mounting seat and meshed with the first gear;
the third gear is coaxially connected to the rotating shaft and meshed with the second gear;
the fourth gear is coaxially connected to the other rotating shaft and meshed with the first gear.
4. The mower of claim 2, wherein said rotational axes are three, said linkage assembly including a worm, a first worm gear, a second worm gear, and a third worm gear;
the worm is rotationally connected to the mounting seat, one end of the worm is fixed on an output shaft of the driving motor, the worm is provided with a first threaded part, a second threaded part and a third threaded part which are distributed along the length direction of the worm, the thread direction of the first threaded part is opposite to that of the second threaded part, and the thread direction of the first threaded part is the same as that of the third threaded part;
the first turbine, the second turbine and the third turbine are respectively coaxially connected to the rotating shaft;
the first worm wheel is meshed with the first threaded part;
the second worm wheel is meshed with the second threaded part;
the third worm gear is engaged with the third threaded portion.
5. The mower of claim 1, further comprising a plug shaft in one-to-one correspondence with said output end and a fastener in one-to-one correspondence with said holding pan;
each output end is provided with an inserting groove;
the inserting shaft is inserted into the inserting groove corresponding to the output end, and one end of the inserting shaft is fixed on the corresponding fixed disc;
the fixing piece penetrates through the corresponding fixed disc, and is in threaded connection with the corresponding plug-in shaft and the output end.
6. The mower of claim 5 wherein each of said output ends has a detent;
on the same output: one side of the positioning groove penetrates through the insertion groove;
the mower further comprises positioning blocks, the positioning blocks correspond to the inserting shafts one by one and are fixed on the corresponding inserting shafts, the inserting shafts are inserted into the corresponding inserting grooves, and the positioning blocks are clamped in the positioning grooves of the inserting shafts.
7. The mower of claim 1, wherein said cutter teeth include a connecting tab having a first end and a second end, said first end being secured to said stationary disk, and a cutting blade having an outwardly convex arcuate cutting edge, said cutting blade being secured to said second end on a side thereof remote from said outwardly convex arcuate cutting edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020428539.8U CN211881068U (en) | 2020-03-27 | 2020-03-27 | Grass cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020428539.8U CN211881068U (en) | 2020-03-27 | 2020-03-27 | Grass cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211881068U true CN211881068U (en) | 2020-11-10 |
Family
ID=73274455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020428539.8U Expired - Fee Related CN211881068U (en) | 2020-03-27 | 2020-03-27 | Grass cutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211881068U (en) |
-
2020
- 2020-03-27 CN CN202020428539.8U patent/CN211881068U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201110 |