CN220141545U - Dust cup structure and dust collector - Google Patents

Dust cup structure and dust collector Download PDF

Info

Publication number
CN220141545U
CN220141545U CN202321573312.2U CN202321573312U CN220141545U CN 220141545 U CN220141545 U CN 220141545U CN 202321573312 U CN202321573312 U CN 202321573312U CN 220141545 U CN220141545 U CN 220141545U
Authority
CN
China
Prior art keywords
dust
main body
dust cup
cup main
filter
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.)
Active
Application number
CN202321573312.2U
Other languages
Chinese (zh)
Inventor
李意
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maother Suzhou Electric Equipment Co ltd
Original Assignee
Maother Suzhou Electric Equipment Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Maother Suzhou Electric Equipment Co ltd filed Critical Maother Suzhou Electric Equipment Co ltd
Priority to CN202321573312.2U priority Critical patent/CN220141545U/en
Application granted granted Critical
Publication of CN220141545U publication Critical patent/CN220141545U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Filters For Electric Vacuum Cleaners (AREA)

Abstract

The utility model discloses a dust cup structure and a dust collector, and relates to the field of pet dust collectors. The key points of the technical scheme include: the dust cup comprises a dust cup main body, wherein the dust cup main body is provided with an air inlet, an air outlet and a dust discharge port respectively; the dust cup cover is connected with the dust cup main body and is used for opening or closing the dust discharge opening; the filter piece is fixedly connected with the dust cup main body, and a plurality of ventilation holes are formed in the filter piece; wherein, a dust collecting cavity is formed among the dust cup main body, the dust cup cover and the filter plate; air enters the dust collection cavity from the air inlet, passes through the filter disc and is discharged from the air outlet. The utility model can conveniently pour out the hair dust in the dust collecting cavity, can reduce the sanitary dead angle in the dust cup main body, is beneficial to cleaning the dust cup main body, and can simplify the structure, reduce the number of parts and facilitate production and processing.

Description

Dust cup structure and dust collector
Technical Field
The utility model relates to the field of pet dust collectors, in particular to a dust cup structure and a dust collector.
Background
The pet dust collector is used as a cleaning tool for combing and trimming the hair of the pet, so that the collected sundries are mainly the hair of the pet. The pet has more hair, so the dust cup of the pet dust collector needs a larger dust collecting cavity compared with the conventional household dust collector, and meanwhile, the hair of the pet in the dust cup needs to be conveniently discharged and cleaned.
The prior Chinese patent with the publication number of CN218338333U discloses a modularized dust collector, which comprises a base module, a dust cup seat module, a dust cup module and a fan module, wherein the dust cup module is arranged on the dust cup seat module to form a dust cup assembly, and at least one group of filters are arranged at the adjacent ends of the dust cup module and the fan module.
However, the dust collector in the above patent has the following problems: 1. when the pet hair is combed, if more hair dust is in the dust cup, the hair dust in the dust cup can be poured out only by disassembling the dust cup module, so that the operation is inconvenient, and the user experience is affected; 2. one end of the dust cup module is closed, a sanitary dead angle is formed inside the dust cup module easily, the dust cup module cannot be cleaned effectively, and user experience is affected.
Disclosure of Invention
Aiming at the defects of the prior art, one of the purposes of the utility model is to provide a dust cup structure which can conveniently pour out hair dust in a dust collecting cavity, reduce the sanitary dead angle in a dust cup main body, is beneficial to cleaning the dust cup main body, and can simplify the structure, reduce the number of parts and facilitate production and processing.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
a dirt cup structure comprising:
the dust cup comprises a dust cup main body, wherein the dust cup main body is provided with an air inlet, an air outlet and a dust discharge port respectively;
the dust cup cover is connected with the dust cup main body and is used for opening or closing the dust discharge opening; the method comprises the steps of,
the filter piece is fixedly connected with the dust cup main body, and a plurality of ventilation holes are formed in the filter piece;
wherein, a dust collecting cavity is formed among the dust cup main body, the dust cup cover and the filter plate; air enters the dust collection cavity from the air inlet, passes through the filter disc and is discharged from the air outlet.
Further, the filter plate is fixedly arranged in the dust cup main body, and a containing cavity for installing the filter piece is formed in the dust cup main body; the dust collection cavity and the accommodating cavity are respectively positioned at two sides of the filter disc;
or the filter plate is fixedly arranged at the air outlet of the dust cup main body.
Further, the filter disc is a metal filter disc, and the metal filter disc is fixedly connected with the dust cup main body through in-mold injection molding, hot melting or a compression ring;
or the filter plate is a plastic filter plate, and the plastic filter plate and the dust cup main body are fixedly connected through integrated forming, hot melting, interference fit or a compression ring.
Further, the inner side wall of the dust cup main body is integrally formed with a positioning ring groove matched with the metal filter disc.
Further, the dust cup main body is cylindrical, and the air outlet and the dust discharge port are respectively positioned at two axial ends of the dust cup main body; the air inlet is arranged on the side wall of the dust cup main body, and the air inlet and the air outlet are respectively positioned on two sides of the filter disc.
Another object of the present utility model is to provide a vacuum cleaner, and provide the following technical solutions:
a dust collector comprises the dust cup structure.
The technical scheme is as follows:
a dust collector comprises a dust collector main machine and the dust cup structure; one end of the filter element is provided with a first sealing joint surface matched with the dust cup main body, and the other end of the filter element is provided with a second sealing joint surface matched with the dust collector main body.
Further, a deflection mounting structure is arranged between the dust cup main body and the dust collector main body, the second sealing joint surface is obliquely arranged relative to the first sealing joint surface, and a circumferential limiting structure is arranged between the filter element and the dust cup main body.
Further, the inner side wall of the dust cup main body is provided with a sealing ring plate which is contacted with the first sealing joint surface; the circumferential limiting structure comprises a limiting seat arranged on the end face of the sealing ring plate, a first limiting surface is arranged on the outer side wall of the limiting seat, and a second limiting surface matched with the first limiting surface is arranged on the outer side wall of the filtering piece.
Further, the filter disc and the limiting seat are respectively positioned at two sides of the sealing ring plate.
In summary, the utility model has the following beneficial effects:
1. in the dust collection process, if more hair dust is contained in the dust collection cavity, the dust cup cover is directly opened, so that the hair dust in the dust collection cavity can be poured out from the dust discharge port without detaching the dust cup main body, and the dust collection device has the advantage of convenient operation, thereby improving user experience;
2. the air inlet, the air outlet and the dust exhaust port are all used as openings of the dust cup main body, so that the sanitary dead angle in the dust cup main body is reduced, the dust cup main body is cleaned, and the user experience is optimized; in addition, the filter disc is provided with a plurality of ventilation holes, so that the air inlet, the air outlet and the dust exhaust port are communicated with each other, and the dust cup main body can be cleaned conveniently;
3. the filter disc is fixedly connected with the dust cup main body, so that the dust cup structure can be simplified, the number of parts is reduced, the production and the processing of the dust cup are convenient, and the use experience of a user can be optimized;
4. the filter is adopted to realize the sealing communication between the dust cup main body and the main machine of the dust collector, so that the structure of the dust cup can be simplified, the number of parts is reduced, and the production and the processing are convenient.
Drawings
FIG. 1 is a schematic view of the structure of a dust cup in embodiment 1;
FIG. 2 is a schematic diagram of a dust cup structure in embodiment 1;
FIG. 3 is a schematic diagram of a dust cup structure in example 1;
FIG. 4 is an enlarged schematic view of portion A of FIG. 3;
fig. 5 is a schematic view of the structure of the vacuum cleaner in embodiment 2;
FIG. 6 is a schematic view showing the structure of the dust cup and the filter in example 2;
fig. 7 is a schematic structural view of the filter member in example 2.
In the figure: 1. a dust cup body; 11. an air inlet; 12. an air outlet; 13. positioning ring grooves; 2. a dust cup cover; 14. sealing ring plates; 15. a limit seat; 151. a first limiting surface; 16. a hook; 17. a clamping groove; 3. a filter sheet; 41. a dust collection chamber; 42. a receiving chamber; 5. a filter; 51. a first sealing interface; 52. a second sealing interface; 53. the second limiting surface; 6. a cleaner main body; 61. a ventilation board; 62. sealing inclined plane.
Description of the embodiments
The present utility model will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explanation of the present utility model and is not to be construed as limiting the present utility model, and modifications to the present embodiment, which may not creatively contribute to the present utility model as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present utility model.
Example 1:
a dust cup structure, referring to fig. 1 to 4, comprises a dust cup main body 1, a dust cup cover 2 and a filter sheet 3; the dust cup main body 1 is respectively provided with an air inlet 11, an air outlet 12 and a dust discharge port; wherein the dust cup cover 2 is connected with the dust cup main body 1, and the dust cup cover 2 is used for opening or closing a dust discharge port; in the embodiment, the filter 3 is fixedly connected with the dust cup main body 1; a dust collecting cavity 41 is formed among the dust cup main body 1, the dust cup cover 2 and the filter sheet 3, air enters the dust collecting cavity 41 from the air inlet 11, passes through the filter sheet 3 and is discharged from the air outlet 12; in the embodiment, a dust discharge port which is independent of the air outlet 12 is arranged on the dust cup main body 1, and a dust cup cover 2 is arranged at the dust discharge port; then in the dust collection process, if more hair dust is in the dust collection cavity 41, the dust cup cover 2 is directly opened, and the hair dust in the dust collection cavity 41 can be poured out from the dust discharge port without detaching the dust cup main body 1, so that the advantage of convenient operation is achieved, and the user experience can be improved.
Referring to fig. 1 to 4, in the present embodiment, a dust collection chamber 41 is formed between a dust cup main body 1, a dust cup cover 2 and a filter sheet 3, and after the dust cup cover 2 is opened, an air inlet 11, an air outlet 12 and a dust discharge port are all openings of the dust cup main body 1; thus being beneficial to reducing the sanitary dead angle in the dust cup main body 1 and cleaning the dust cup main body 1, thereby optimizing the user experience; the filter sheet 3 is provided with a plurality of ventilation holes, and the air inlet 11, the air outlet 12 and the dust exhaust port are communicated with each other, so that the dust cup main body 1 can be cleaned conveniently, for example, the dust cup main body is directly washed by water flow; specifically, in this embodiment, the dust cup main body 1 is cylindrical, and the air outlet 12 and the dust discharge port are respectively located at two axial ends of the dust cup main body 1; the air inlet 11 is arranged on the side wall of the dust cup main body 1, and the air inlet 11 and the air outlet 12 are respectively positioned on two sides of the filter disc 3; of course, in alternative embodiments, the dirt cup body 1 may take other shapes, such as square, etc., without limitation.
Referring to fig. 1 to 4, in the present embodiment, one end of a dust cup cover 2 is hinged to a dust cup main body 1, and the other end is clamped to the dust cup main body 1; an elastic locking component matched with the dust cup cover 2 is arranged on the dust cup main body 1; the elastic locking component belongs to the prior art and is not described in detail herein; of course, in alternative embodiments, the dust cup cover 2 and the dust cup main body 1 may be connected by threads, which is not limited herein.
Referring to fig. 1 to 4, in the case that the dust cup main body 1 is provided with the dust discharge port and the dust cup cover 2, the filter sheet 3 is fixedly connected with the dust cup main body 1 in the embodiment, and the arrangement can simplify the dust cup structure, reduce the number of parts, facilitate the production and processing of the dust cup, and optimize the use experience of users; the filter 3 is fixedly arranged in the dust cup main body 1 in the embodiment, and a containing cavity 42 for installing the filter 5 is formed in the dust cup main body 1; the dust collection cavity 41 and the accommodating cavity 42 are respectively positioned at two sides of the filter sheet 3; that is, the air outlet 12 is used as an opening of the accommodating chamber 42 in the present embodiment, and the filter 5 is mounted or dismounted through the air outlet 12; of course, in other alternative embodiments, the filter 3 may be fixedly disposed at the air outlet of the dust cup main body 1, which is not limited herein; in the embodiment, the filter disc 3 is fixedly arranged in the dust cup main body 1, so that the filter disc 3 can be protected, damage caused by collision between the filter disc 3 and foreign objects is avoided, and the service life of the dust cup structure is prolonged; meanwhile, the accommodating cavity 42 for installing the filter element 5 is formed in the dust cup main body 1, and under the condition that the filter element 3 is fixedly arranged in the dust cup main body 1, the filter element 5 can be directly utilized to realize the sealing communication between the dust cup and the dust collector main body, so that the dust cup structure can be simplified, the number of parts is reduced, the production and the processing are convenient, and the cost is reduced.
Referring to fig. 1 to 4, in this embodiment, the filter 3 is a metal filter sheet, and dense ventilation holes are formed in the metal filter sheet by punching; of course, in other alternative embodiments, the metal filter sheet may be formed by connecting metal wires, and the vent holes are directly formed between the metal wires, which is not limited herein; preferably, in the embodiment, the metal filter disc 3 and the dust cup main body 1 are fixedly connected through in-mold injection molding, so that the number of parts and assembly procedures can be reduced, the production efficiency is improved, and the connection is reliable and attractive; specifically, the inner side wall of the dust cup main body 1 is integrally formed with a positioning ring groove 13 matched with the metal filter disc 3; of course, in other alternative embodiments, the metal filter disc 3 and the dust cup main body 1 can be fixedly connected through hot melting, and also can be fixedly connected through a compression ring, which is not limited herein; in other alternative embodiments, the filter 3 may also be a plastic filter, and the plastic filter and the dust cup main body 1 are fixedly connected by an integral molding, hot melting, interference fit, or a compression ring, preferably integrally molded.
Example 2:
a vacuum cleaner, referring to fig. 1 to 7, comprising a cleaner main body 6, and a dust cup structure of embodiment 1; wherein, one end of the filter element 5 is provided with a first sealing joint surface 51 matched with the dust cup main body 1, and the other end is provided with a second sealing joint surface 52 matched with the dust collector main body 6; that is, air enters the dust collection chamber 41 from the air inlet 11 on the dust cup main body 1, and then sequentially passes through the filter sheet 3 and the filter 5 to enter the cleaner main body 6; the air passes through the air outlet 12 of the dust cup body 1 when passing through the filter element 5; the filter 5 is adopted to realize the sealing communication between the dust cup main body 1 and the dust collector main body 6, so that the dust cup structure can be simplified, the number of parts is reduced, and the production and the processing are convenient; specifically, the filter element 5 in this embodiment includes a filter holder, a first seal engagement surface 51 is formed at one axial end of the filter holder, a second seal engagement surface 52 is formed at the other axial end of the filter holder, and an axial seal passage is formed in the filter holder between the first seal engagement surface 51 and the second seal engagement surface; a mounting groove is formed in one side, close to the first sealing joint surface 51, of the filter support, and a filter sponge or a filter handkerchief is arranged in the mounting groove.
Referring to fig. 1 to 7, the cleaner main body 6 of the present embodiment is provided with a ventilation plate 61 which contacts the second seal-engaging surface 52; the ventilation plate 61 is provided with ventilation holes, and one side of the ventilation plate 61 far away from the filter element 5 is provided with a motor component; preferably, a groove is arranged on the end face of the ventilation plate 61 facing the filter element 5, and a filter sponge for shielding the ventilation holes is arranged in the groove; that is, triple filtration is achieved using the filter sheet 3, the filter 5, and the filter sponge in this embodiment.
Referring to fig. 1 to 7, in the present embodiment, a deflection mounting structure is provided between the dust cup main body 1 and the cleaner main body 6, a second seal joint surface 52 is provided obliquely with respect to the first seal joint surface 51, and a circumferential limit structure is provided between the filter element 5 and the dust cup main body 1; wherein the ventilation plate 61 is provided with a sealing inclined surface 62 which is matched with the second sealing joint surface 52; when the dust cup main body 1 is installed on the main cleaner body 6 in a deflection manner, the second sealing joint surface 52 which is obliquely arranged is matched with the sealing inclined surface 62 in consideration of the machining errors and the assembly errors of parts, so that the filter element 5 and the ventilation plate 61 are tightly attached, and the sealing effect is improved; the inclination angle and direction of the second seal engaging surface 52 may be selected according to the deflection mounting structure, and is not limited herein.
Referring to fig. 1 to 7, specifically, in this embodiment, the cleaner is a canister type cleaner, and the dust cup main body 1 is horizontally disposed after being mounted to the cleaner main body 6; the deflection mounting structure in the embodiment comprises a clamping hook 16 arranged at the bottom end of the outer side wall of the dust cup main body 1 and a clamping groove 17 arranged at the top end of the outer side wall of the dust cup main body 1; wherein, the clamping hook 16 is close to the dust exhaust port, the clamping groove 17 is close to the air outlet, so that the clamping hook 16 and the clamping groove 17 are diagonally arranged; the second sealing joint surface 52 is formed with a sealing high point protruding along the axial direction, and the sealing high point is positioned at the top end of the second sealing joint surface 52 and is close to the clamping groove 17; when the dust cup main body 1 is mounted on the dust collector main body 6, the clamping hook 16 is embedded in the dust collector main body 6, and then the dust cup main body 1 is deflected downwards around the clamping hook 16, so that the dust cup main body 1 is connected with the dust collector main body 6; after the dust cup main body 1 is installed in place, the elastic locking block on the dust collector main body 6 is embedded into the clamping groove 17, so that the dust cup main body 1 can be prevented from being separated; of course, in alternative embodiments, the cleaner may be an upright cleaner, without limitation.
Referring to fig. 1 to 7, the hooks 16 and the slots 17 are fixed to the dust cup body 1, so that a circumferential limit structure is adopted between the filter element 5 and the dust cup body 1 in order to ensure consistency of the installation positions of the filter element 5 and the dust cup body 1; specifically, the inner side wall of the dust cup body 1 is provided with a seal ring plate 14 in contact with the first seal engagement surface 51; the circumferential limiting structure comprises a limiting seat 15 arranged on the end face of the sealing ring plate 14, a first limiting surface 151 is arranged on the outer side wall of the limiting seat 15, and a second limiting surface 53 matched with the first limiting surface 151 is arranged on the outer side wall of the filter element 5; in this embodiment, the first limiting surface 151 and the second limiting surface 53 are both planar, so that circumferential limitation between the filter element 5 and the dust cup main body 1 can be achieved after the first limiting surface 151 contacts with the second limiting surface 53; of course, in alternative embodiments, the circumferential spacing structure may take other forms, and is not limited herein.
Referring to fig. 1 to 7, in the present embodiment, the filter 3 and the limiting seat 15 are respectively located at two sides of the sealing ring plate 14; that is, in this embodiment, one side end surface of the seal ring plate 14 is used as the inner wall of the positioning ring groove 13, and is directly contacted with the filter sheet 3; by adopting the arrangement, the structure can be simplified, and the production and the processing are convenient.

Claims (10)

1. A dust cup structure, comprising:
the dust cup comprises a dust cup main body, wherein the dust cup main body is provided with an air inlet, an air outlet and a dust discharge port respectively;
the dust cup cover is connected with the dust cup main body and is used for opening or closing the dust discharge opening; the method comprises the steps of,
the filter piece is fixedly connected with the dust cup main body, and a plurality of ventilation holes are formed in the filter piece;
wherein, a dust collecting cavity is formed among the dust cup main body, the dust cup cover and the filter plate; air enters the dust collection cavity from the air inlet, passes through the filter disc and is discharged from the air outlet.
2. A dirt cup structure in accordance with claim 1, wherein: the filter plate is fixedly arranged in the dust cup main body, and a containing cavity for installing the filter piece is formed in the dust cup main body; the dust collection cavity and the accommodating cavity are respectively positioned at two sides of the filter disc;
or the filter plate is fixedly arranged at the air outlet of the dust cup main body.
3. A dirt cup structure in accordance with claim 1, wherein: the filter disc is a metal filter disc, and the metal filter disc is fixedly connected with the dust cup main body through in-mold injection molding, hot melting or a compression ring;
or the filter plate is a plastic filter plate, and the plastic filter plate and the dust cup main body are fixedly connected through integrated forming, hot melting, interference fit or a compression ring.
4. A dirt cup structure in accordance with claim 1, wherein: the inner side wall of the dust cup main body is integrally formed with a positioning ring groove matched with the metal filter disc.
5. A dirt cup structure in accordance with claim 1, wherein: the dust cup main body is cylindrical, and the air outlet and the dust discharge port are respectively positioned at two axial ends of the dust cup main body; the air inlet is arranged on the side wall of the dust cup main body, and the air inlet and the air outlet are respectively positioned on two sides of the filter disc.
6. A vacuum cleaner, characterized in that: comprising a dirt cup structure as claimed in any one of claims 1 to 5.
7. A vacuum cleaner, characterized in that: comprising a cleaner main unit and a dust cup structure as claimed in claim 2; one end of the filter element is provided with a first sealing joint surface matched with the dust cup main body, and the other end of the filter element is provided with a second sealing joint surface matched with the dust collector main body.
8. A vacuum cleaner as claimed in claim 7, wherein: the dust cup is characterized in that a deflection mounting structure is arranged between the dust cup main body and the dust collector main body, the second sealing joint surface is obliquely arranged relative to the first sealing joint surface, and a circumferential limiting structure is arranged between the filter element and the dust cup main body.
9. A vacuum cleaner as claimed in claim 8, wherein: the inner side wall of the dust cup main body is provided with a sealing ring plate which is contacted with the first sealing joint surface; the circumferential limiting structure comprises a limiting seat arranged on the end face of the sealing ring plate, a first limiting surface is arranged on the outer side wall of the limiting seat, and a second limiting surface matched with the first limiting surface is arranged on the outer side wall of the filtering piece.
10. A vacuum cleaner as claimed in claim 9, wherein: the filter disc and the limiting seat are respectively positioned at two sides of the sealing ring plate.
CN202321573312.2U 2023-06-20 2023-06-20 Dust cup structure and dust collector Active CN220141545U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202321573312.2U CN220141545U (en) 2023-06-20 2023-06-20 Dust cup structure and dust collector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202321573312.2U CN220141545U (en) 2023-06-20 2023-06-20 Dust cup structure and dust collector

Publications (1)

Publication Number Publication Date
CN220141545U true CN220141545U (en) 2023-12-08

Family

ID=89006254

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202321573312.2U Active CN220141545U (en) 2023-06-20 2023-06-20 Dust cup structure and dust collector

Country Status (1)

Country Link
CN (1) CN220141545U (en)

Similar Documents

Publication Publication Date Title
CN111035326A (en) Robot evacuation station and robot system of sweeping floor sweep
CN220141545U (en) Dust cup structure and dust collector
CN209404644U (en) A kind of dust pocket assembling structure and dust catcher
CN214208227U (en) Self-cleaning dust barrel assembly and handheld dust collector with same
CN210300861U (en) Dust collection box and cleaning robot
CN221786118U (en) Base assembly structure of dust collector
CN221616900U (en) Cleaning device and dust box assembly
CN217772208U (en) Floor brush assembly and surface cleaning device
CN219742620U (en) Dust collection base station and cleaning robot system
CN215539260U (en) Pipeline air filter
CN220695141U (en) Multifunctional dust collector for pets
CN211633110U (en) Robot evacuation station and robot system of sweeping floor sweep
CN216293937U (en) Dust separation module and cleaning machine
CN218978815U (en) Base station for sweeping robot
CN216060403U (en) Dust separation module and cleaning machine
CN215489904U (en) Range hood and air inlet ring thereof
CN221671576U (en) Dust collector with motor cover assembly
CN219763220U (en) Industrial dust collector with new structure
CN220675908U (en) Cleaning robot
CN217610795U (en) Dirt cup subassembly and cleaning device
CN212834242U (en) Dustproof device for spinning
CN221153944U (en) Filtering component of handheld dust collector
CN214958995U (en) Motor power assembly and ground cleaning equipment
CN218697672U (en) Workbench with central dust collector
CN212879136U (en) HEPA structure of dust collector

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant