CN110843389A - Automatic regulating closed blackboard eraser device - Google Patents
Automatic regulating closed blackboard eraser device Download PDFInfo
- Publication number
- CN110843389A CN110843389A CN201911335635.6A CN201911335635A CN110843389A CN 110843389 A CN110843389 A CN 110843389A CN 201911335635 A CN201911335635 A CN 201911335635A CN 110843389 A CN110843389 A CN 110843389A
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- blackboard eraser
- positioning column
- blocking plate
- groove
- blocking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L21/00—Blackboard or slate cleaning devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L21/00—Blackboard or slate cleaning devices
- B43L21/02—Blackboard or slate cleaning devices with means for absorbing the chalk dust
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- Drawing Aids And Blackboards (AREA)
Abstract
The invention discloses an automatic-adjustment closed blackboard eraser device, which comprises a blackboard eraser body, a rotary brush, a transmission device and a storage device, wherein the rotary brush is arranged on the blackboard eraser body; the blackboard eraser comprises a blackboard eraser body, and is characterized in that an annular track is formed in the blackboard eraser body, a plurality of positioning columns are distributed on two sides of the annular track along the circumferential direction, adjusting springs are sleeved on the positioning columns, a plurality of blocking mechanisms are installed on the annular track, each blocking mechanism comprises a first blocking plate and a second blocking plate, each rotating brush comprises a rotating plate and a rotating hairbrush, the rotating hairbrush is distributed on one end face of the rotating plate, and a connecting shaft is fixed on the other end; the transmission device comprises a power mechanism, a transmission part, a first driven straight gear, a second driven straight gear and an adsorption tube. The blackboard cleaning device can rotate by combining the transmission mechanism with the rotary brush and the storage device, so that dust at right-angle sides can be cleaned conveniently, the dust cleaning efficiency is improved, the dust pollution is reduced, in addition, the dust is prevented from entering the blackboard cleaning device through the annular rail by the blocking mechanism, and the service life of the transmission mechanism is prolonged.
Description
Technical Field
The invention belongs to the technical field of education auxiliary equipment, and relates to an automatic-adjusting closed blackboard eraser device.
Background
The blackboard eraser is a necessary tool in the teaching process, is mainly used for erasing the traces on the blackboard so as to realize rewriting, and has been widely applied. When the traditional blackboard eraser is used, the traditional blackboard eraser needs manual operation to erase the traces on the blackboard, so that time and labor are wasted, and the efficiency is low. At present, two types of blackboard erasers used in teaching are mainly used, one type of blackboard eraser is manufactured by planting and fixing bristles or chemical fiber filaments on a wood board or a plastic board, chalk dust is not easy to adhere to a blackboard eraser body when chalk marks on the blackboard surface are erased by the blackboard eraser, but the chalk dust is large in flying amount, serious in environmental pollution and not beneficial to health of teachers and students. The second one is that the metal shell is embedded with rectangular silk floss block or other chemical fiber material block, when the blackboard eraser is used for erasing chalk writing on the blackboard surface, although the flying amount of chalk dust is small, the blackboard eraser body is easy to adhere chalk dust. In order to improve the wiping effect, teachers or valuable students usually collide or flap on the edge of a blackboard, a speaking table top or a teacher's desk ridge to cause chalk dust to fly, which is harmful to the health of teachers and students, and is not beneficial to recycling the chalk dust, sometimes the damage of the blackboard eraser is caused.
Disclosure of Invention
The invention aims to provide an automatic-adjustment closed blackboard eraser device, which solves the problems that the service life of the device is shortened and the harm of dust to human health is caused due to the fact that the existing dust easily enters a blackboard cleaning device.
The purpose of the invention can be realized by the following technical scheme:
the automatic adjustment closed blackboard eraser device comprises a blackboard eraser body, a rotary brush, a transmission device and a storage device; the blackboard eraser body is provided with a first positioning column, the first positioning column is provided with a first air vent connected with an air suction pipeline, the bottom of the blackboard eraser body is provided with an annular track, the annular track and the first positioning column are coaxial, a plurality of positioning columns are distributed on two sides of the annular track along the circumferential direction, the positioning columns comprise an inner positioning column and an outer positioning column, adjusting springs are sleeved on the inner positioning column and the outer positioning column, a plurality of blocking mechanisms are installed on the annular track, each blocking mechanism comprises a first blocking plate and a second blocking plate, the first blocking plate is installed on the outer positioning column, the second blocking plate is installed on the inner positioning column, the first blocking plate is provided with a first groove, a first bulge matched with the first groove is arranged between the lower surface and the upper surface of the first groove, the thickness of the first bulge is smaller than the height of the first groove, the second blocking plate is provided with a second groove, the upper surface of the second groove and the lower surface piece are provided with a second bulge matched with the, the sum of the thickness of the second protrusion and the thickness of the first blocking plate is smaller than the height of the second groove;
the rotary brush comprises a rotating plate and a rotary hairbrush, wherein the rotary hairbrush is distributed on one end face of the rotating plate, the rotary hairbrush and the hairbrush are in the same horizontal plane, and a connecting shaft is fixed on the other end face of the rotary hairbrush;
the transmission device comprises a power mechanism, a transmission part, a first driven straight gear, a second driven straight gear and an adsorption tube, wherein the power mechanism comprises a motor, an output shaft of the motor is connected with a driving bevel gear, the transmission part comprises a transmission rod, a driven bevel gear and a driving straight gear, the driving bevel gear is meshed with the driven bevel gear, the driving straight gear is connected with the second driven straight gear through the first driven straight gear, the second driven straight gear is fixed with a connecting shaft on the rotating plate, and the rotating plate is driven to rotate through the second driven straight gear;
the storage device comprises a base and an extension body, wherein a groove is formed in the base, and a protrusion matched with the annular groove in the blackboard eraser body is arranged on the lower end face of the extension body.
Further, the blackboard eraser further comprises a cover body, the cover body is located above the blackboard eraser body and is in threaded connection with the blackboard eraser body, and a handle is mounted on the cover body.
Furthermore, an inner positioning column is matched with an outer positioning column, and the connecting line of the inner positioning column and the outer positioning column passes through the axis of the first positioning column.
Furthermore, the first blocking plate and the second blocking plate are in comma shapes, the first blocking plate and the second blocking plate are symmetrical about a plane vertical to the middle part of a connecting line of an inner positioning column and an outer positioning column matched with the inner positioning column, the first blocking plate rotates around the outer positioning column, the rotating angle is 0-90 degrees anticlockwise, the second blocking plate rotates around the inner positioning column, and the rotating angle is 0-90 degrees clockwise.
Further, a brush is fixed on the lower end face of the blackboard eraser body, the distribution range of the brush is circular, and the height of the brush is larger than that of the air draft pipeline and is higher than 1-5 mm.
Furthermore, the connecting shaft is cylindrical, the connecting shaft penetrates through the annular track, and the width of the annular track is 0.5-2mm larger than the diameter of the connecting shaft.
Furthermore, second vent holes are formed in the transmission rod and the driven bevel gear and are connected with first vent holes in the first positioning column, the first vent holes and the second vent holes are coaxial and have the same radius and size, and the second vent holes are connected with one end of the adsorption tube;
furthermore, the outer diameter of the base is smaller than the inner diameter of the blackboard eraser body, a connecting hole for connecting an adsorption tube is formed in the bottom of the base, and the radius of the outer extension body is smaller than the outer diameter of the blackboard eraser body.
The invention has the beneficial effects that:
the automatic adjustment closed blackboard eraser device provided by the invention can rotate by combining the transmission mechanism with the rotary brush and the storage device, so that dust at right-angle sides can be conveniently cleaned, the dust cleaning efficiency is improved, the dust pollution is reduced, in addition, the dust is prevented from entering the blackboard cleaning device through the annular track by the blocking mechanism, and the service life of the transmission mechanism is prolonged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments 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 that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is an exploded view of the self-adjusting enclosed blackboard eraser apparatus of the present invention;
fig. 2 is a schematic structural view of the blackboard eraser body according to the present invention;
FIG. 3 is a schematic structural view of the blackboard eraser body according to the present invention;
FIG. 4 is a schematic structural view of a blocking mechanism according to the present invention;
FIG. 5 is a schematic view of the structure of the two blocking mechanisms of the present invention;
FIG. 6 is a schematic view of the transmission of the present invention;
fig. 7 is a partial schematic view of a blackboard eraser body according to the present invention;
FIG. 8 is a schematic structural diagram of a memory device according to the present invention;
FIG. 9 is a schematic structural diagram of a memory device according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-9, the present invention is an automatically adjusting enclosed blackboard eraser apparatus, which comprises a blackboard eraser body 1, a rotating brush 2, a transmission device 3, a storage device 4 and a cover 5;
the blackboard eraser body 1 is cylindrical in side wall, a first positioning column 13 is arranged at the bottom, a first vent hole is formed in the first positioning column 13 and connected with a draft duct 16, an annular groove 15 is formed in the inner wall of the blackboard eraser body 1, and the width of the annular groove 15 is smaller than the wall thickness of the blackboard eraser body 1; the bottom of the blackboard eraser body 1 is also provided with an annular rail 12, the annular rail 12 and the first positioning column 13 are coaxial, a plurality of positioning columns 143 are distributed on two sides of the annular rail 12 along the circumferential direction, each positioning column 143 comprises an inner positioning column and an outer positioning column, one inner positioning column is matched with one outer positioning column, and the connecting line of the one inner positioning column and the one outer positioning column passes through the axis of the first positioning column 13; the annular rail 12 is provided with a plurality of blocking mechanisms 14, each blocking mechanism 14 comprises a first blocking plate 141 and a second blocking plate 142, the first blocking plate 141 and the second blocking plate 142 are in comma shapes, the first blocking plate 141 and the second blocking plate 142 are symmetrical about a plane which is vertical to the middle part of a connecting line of an inner positioning column 143 and an outer positioning column which is matched with the inner positioning column, the first blocking plate 141 rotates around the outer positioning column at a rotation angle of 0-90 degrees anticlockwise, the second blocking plate 142 rotates around the inner positioning column at a rotation angle of 0-90 degrees clockwise, a first groove 147 is formed in the first blocking plate 141, a first protrusion 144 which is matched with the first groove 147 is arranged between the lower surface and the upper surface of the first groove 147, the thickness of the first protrusion 144 is smaller than the height of the first groove 147, a second groove is formed in the second blocking plate 146, a second protrusion 145 which is matched with the second groove 146 is arranged on the upper surface and the lower surface of the second groove 146, the thickness of the second protrusion 145, the thickness of the first blocking plate 141 and the height of the second groove 146 are smaller than each other, and in addition, the inner positioning column and the outer positioning column are sleeved with adjusting springs, so that the rotation angle adjustment of the first blocking plate 141 and the second blocking plate 142 can be realized;
a brush 11 is fixed on the lower end face of the blackboard eraser body 1, the distribution range of the brush 11 is circular, and the height of the brush 11 is larger than that of the air draft pipeline 16 and is higher than 1-5 mm;
the rotating brush 2 comprises a rotating plate 21 and a rotating hairbrush 22, the rotating hairbrush 22 is vertically distributed on one end face of the rotating plate 21, the rotating hairbrush 22 and the hairbrush 11 are in the same horizontal plane, a connecting shaft is fixed on the other end face, the rotating plate 21 is driven to rotate through the rotation of the connecting shaft, the rotating hairbrush 22 on the rotating plate 21 is further driven to repeatedly rotate by 0-180 degrees, the connecting shaft is cylindrical, the connecting shaft penetrates through the annular rail 12, and the width of the annular rail 12 is 0.5-2mm larger than the diameter of the connecting shaft;
the transmission device 3 comprises a power mechanism 31, a transmission part 32, a first driven spur gear 33, a second driven spur gear 34 and an adsorption pipe 35, the power mechanism 31 comprises a motor 311, an output shaft of the motor 311 is connected with a driving bevel gear 312, the transmission part 32 comprises a transmission rod 321, a driven bevel gear 322 and a driving spur gear 323, the driving bevel gear 312 is meshed with the driven bevel gear 322, the driving spur gear 323 is connected with the second driven spur gear 34 through the first driven spur gear 33, the second driven spur gear 34 is fixed with a connecting shaft on the rotating plate 21, and the rotating plate 21 is driven to rotate through the second driven spur gear 34;
a first mounting hole is formed in the driving straight gear 323, the first mounting hole is in sliding fit with the first positioning column 13 and is used for fixing the position of the transmission member 32, and the driving straight gear 323 can rotate around the first positioning column 13;
second vent holes are formed in the transmission rod 321 and the driven bevel gear 322, the second vent holes are connected with first vent holes in the first positioning column 13, the first vent holes and the second vent holes are coaxial and have the same radius and size, and the second vent holes are connected with one end of the adsorption tube 35;
the storage device 4 comprises a base 41 and an outer extension body 42, a groove 43 is formed in the base 41, the base 41 and the groove 43 are cylindrical, the outer diameter of the base 41 is smaller than the inner diameter of the blackboard eraser body 1, a connecting hole 44 for connecting the adsorption pipe 35 is formed in the bottom of the base 41, the radius of the outer extension body 42 is smaller than the outer diameter of the blackboard eraser body 1, a protrusion 45 is arranged on the lower end face of the outer extension body 42, the protrusion 45 is matched with the annular groove 15, dust storage is improved, and dust pollution is reduced.
The cover body 5 is located above the blackboard eraser body 1 and is in threaded connection with the blackboard eraser body 1, and a handle is mounted on the cover body 5, so that the position of the blackboard eraser can be conveniently adjusted through the handle.
When the blackboard cleaning device works, the motor 311 works to drive the driving bevel gear 312 at the output end of the motor 311 to rotate, the driving bevel gear 312 drives the driven bevel gear 322 to rotate, the driven bevel gear 322 drives the driving spur gear 323 to rotate through the transmission rod 321, the driving spur gear 323 drives the second driven spur gear 34 to rotate through the first driven spur gear 33, and the first driven spur gear 33 and the second driven spur gear 34 perform circular motion around the first positioning column 13, the second driven spur gear 34 drives the rotating plate 21 to perform circular motion in the annular track 12 through the connecting shaft, when the connecting shaft is rotated to a certain blocking mechanism 14, the connecting shaft separates the first blocking plate 141 and the second blocking plate 142, after the connecting shaft passes through the blocking mechanism 14, the first blocking plate 141 and the second blocking plate 142 are restored to the state that the first blocking plate 141 is matched with the second blocking plate 142 under the action of the adjusting spring.
The automatic adjustment closed blackboard eraser device provided by the invention can rotate by combining the transmission mechanism with the rotary brush and the storage device, so that dust at right-angle sides can be conveniently cleaned, the dust cleaning efficiency is improved, the dust pollution is reduced, in addition, the dust is prevented from entering the blackboard cleaning device through the annular track by the blocking mechanism, and the service life of the transmission mechanism is prolonged.
The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.
Claims (8)
1. Automatic adjust closed blackboard eraser device, its characterized in that: comprises a blackboard eraser body (1), a rotary brush (2), a transmission device (3) and a storage device (4);
the blackboard eraser comprises a blackboard eraser body (1), wherein a first positioning column (13) is arranged on the blackboard eraser body (1), a first vent hole connected with an air suction pipeline (16) is formed in the first positioning column (13), an annular rail (12) is formed in the bottom of the blackboard eraser body (1), the annular rail (12) and the first positioning column (13) are coaxial, a plurality of positioning columns (143) are distributed on two sides of the annular rail (12) along the circumferential direction, the positioning columns (143) comprise inner positioning columns and outer positioning columns, adjusting springs are sleeved on the inner positioning columns and the outer positioning columns, a plurality of blocking mechanisms (14) are installed on the annular rail (12), each blocking mechanism (14) comprises a first blocking plate (141) and a second blocking plate (142), the first blocking plate (141) is installed on one outer positioning column, the second blocking plate (142) is installed on one inner positioning column, a first groove (147) is formed in the first blocking plate (141), and a first protrusion matched with the first groove (147) is arranged between the lower surface and the upper surface of the first (144) The thickness of the first protrusion (144) is smaller than the height of the first groove (147), a second groove (146) is formed in the second blocking plate (142), a second protrusion (145) matched with the second groove (146) is arranged on the upper surface and the lower surface of the second groove (146), and the thickness of the second protrusion (145) is smaller than the thickness of the first blocking plate (141) and the height of the second groove (146);
the rotary brush (2) comprises a rotary plate (21) and rotary brushes (22), the rotary brushes (22) are distributed on one end face of the rotary plate (21), the rotary brushes (22) and the brushes (11) are at the same height on the same horizontal plane, and a connecting shaft is fixed on the other end face;
the transmission device (3) comprises a power mechanism (31), a transmission part (32), a first driven straight gear (33), a second driven straight gear (34) and an adsorption tube (35), the power mechanism (31) comprises a motor (311), an output shaft of the motor (311) is connected with a driving bevel gear (312), the transmission part (32) comprises a transmission rod (321), a driven bevel gear (322) and a driving straight gear (323), the driving bevel gear (312) is meshed with the driven bevel gear (322), the driving straight gear (323) is connected with the second driven straight gear (34) through the first driven straight gear (33), the second driven straight gear (34) is fixed with a connecting shaft on the rotating plate (21), and the rotating plate (21) is driven to rotate through the second driven straight gear (34);
the storage device (4) comprises a base (41) and an extension body (42), a groove (43) is formed in the base (41), and a protrusion (45) matched with the annular groove (15) in the blackboard eraser body (1) is arranged on the lower end face of the extension body (42).
2. The self-adjusting enclosed blackboard eraser apparatus of claim 1, wherein: the blackboard eraser is characterized by further comprising a cover body (5), wherein the cover body (5) is located above the blackboard eraser body (1) and is in threaded connection with the blackboard eraser body (1), and a handle is mounted on the cover body (5).
3. The self-adjusting enclosed blackboard eraser apparatus of claim 1, wherein: an inner positioning column is matched with an outer positioning column, and the connecting line of the inner positioning column and the outer positioning column passes through the axis of the first positioning column (13).
4. The self-adjusting enclosed blackboard eraser apparatus of claim 1, wherein: the first blocking plate (141) and the second blocking plate (142) are comma-shaped, the first blocking plate (141) and the second blocking plate (142) are symmetrical about a plane which is vertical to the middle part of a connecting line of an inner positioning column (143) and an outer positioning column matched with the inner positioning column, the first blocking plate (141) rotates around the outer positioning column, the rotating angle is 0-90 degrees anticlockwise, the second blocking plate (142) rotates around the inner positioning column, and the rotating angle is 0-90 degrees clockwise.
5. The self-adjusting enclosed blackboard eraser apparatus of claim 1, wherein: the blackboard eraser body (1) is characterized in that a brush (11) is fixed on the lower end face of the blackboard eraser body (1), the distribution range of the brush (11) is circular, and the height of the brush (11) is larger than that of the air draft pipeline (16) and is higher than 1-5 mm.
6. The self-adjusting enclosed blackboard eraser apparatus of claim 1, wherein: the connecting shaft is cylindrical, the connecting shaft penetrates through the annular track (12), and the width of the annular track (12) is 0.5-2mm larger than the diameter of the connecting shaft.
7. The self-adjusting enclosed blackboard eraser apparatus of claim 1, wherein: and second vent holes are formed in the transmission rod (321) and the driven bevel gear (322), the second vent holes are connected with first vent holes in the first positioning column (13), the first vent holes and the second vent holes are coaxial and have the same radius size, and the second vent holes are connected with one end of the adsorption tube (35).
8. The self-adjusting enclosed blackboard eraser apparatus of claim 1, wherein: the outer diameter of the base (41) is smaller than the inner diameter of the blackboard eraser body (1), a connecting hole (44) for connecting the adsorption tube (35) is formed in the bottom of the base (41), and the radius of the extension body (42) is smaller than the outer diameter of the blackboard eraser body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911335635.6A CN110843389B (en) | 2019-12-20 | 2019-12-20 | Automatic regulating closed blackboard eraser device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911335635.6A CN110843389B (en) | 2019-12-20 | 2019-12-20 | Automatic regulating closed blackboard eraser device |
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| Publication Number | Publication Date |
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| CN110843389A true CN110843389A (en) | 2020-02-28 |
| CN110843389B CN110843389B (en) | 2021-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911335635.6A Active CN110843389B (en) | 2019-12-20 | 2019-12-20 | Automatic regulating closed blackboard eraser device |
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|---|---|---|---|---|
| JPH0825892A (en) * | 1994-07-20 | 1996-01-30 | Tookado:Kk | Erasing device of white board or the like |
| CN2427345Y (en) * | 2000-03-28 | 2001-04-25 | 陈锋 | Arc shaped returning, semi-sealing and multi-functional type chalk-dust free blackboard wiper |
| CN2763080Y (en) * | 2004-12-20 | 2006-03-08 | 关书生 | Blackboard eraser |
| CN2834935Y (en) * | 2005-04-29 | 2006-11-08 | 翔余有限公司 | Structure improvement of electric blackboard eraser |
| KR20110005191A (en) * | 2009-07-09 | 2011-01-17 | 이부근 | Water an eraser revolve shape automatic a washer |
| KR20130088469A (en) * | 2012-01-31 | 2013-08-08 | 홍주연 | Brushing device for the blackboard eraser |
| CN209028854U (en) * | 2018-06-21 | 2019-06-25 | 光峰光电(无锡)有限公司 | A kind of dual-purpose instructional device of writing projection |
-
2019
- 2019-12-20 CN CN201911335635.6A patent/CN110843389B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0825892A (en) * | 1994-07-20 | 1996-01-30 | Tookado:Kk | Erasing device of white board or the like |
| CN2427345Y (en) * | 2000-03-28 | 2001-04-25 | 陈锋 | Arc shaped returning, semi-sealing and multi-functional type chalk-dust free blackboard wiper |
| CN2763080Y (en) * | 2004-12-20 | 2006-03-08 | 关书生 | Blackboard eraser |
| CN2834935Y (en) * | 2005-04-29 | 2006-11-08 | 翔余有限公司 | Structure improvement of electric blackboard eraser |
| KR20110005191A (en) * | 2009-07-09 | 2011-01-17 | 이부근 | Water an eraser revolve shape automatic a washer |
| KR20130088469A (en) * | 2012-01-31 | 2013-08-08 | 홍주연 | Brushing device for the blackboard eraser |
| CN209028854U (en) * | 2018-06-21 | 2019-06-25 | 光峰光电(无锡)有限公司 | A kind of dual-purpose instructional device of writing projection |
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| CN110843389B (en) | 2021-11-02 |
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Inventor after: Dai Shishen Inventor after: Yang Xingyu Inventor before: Yang Xingyu |
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Effective date of registration: 20210928 Address after: 325200 Ruian Development Zone, Ruian City, Wenzhou, China Applicant after: Zhejiang Shenzhen Science and Technology Co.,Ltd. Address before: 233255 Guansi street, Cang Town, Dingyuan County, Chuzhou City, Anhui Province Applicant before: Yang Xingyu |
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