CN109130641B - Self-cleaning blackboard eraser - Google Patents
Self-cleaning blackboard eraser Download PDFInfo
- Publication number
- CN109130641B CN109130641B CN201811226754.3A CN201811226754A CN109130641B CN 109130641 B CN109130641 B CN 109130641B CN 201811226754 A CN201811226754 A CN 201811226754A CN 109130641 B CN109130641 B CN 109130641B
- Authority
- CN
- China
- Prior art keywords
- dust
- felt
- blackboard eraser
- blackboard
- guide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000004140 cleaning Methods 0.000 title claims abstract description 54
- 239000000428 dust Substances 0.000 claims abstract description 94
- 230000002457 bidirectional effect Effects 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 5
- 238000005201 scrubbing Methods 0.000 abstract 1
- 238000009423 ventilation Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
Classifications
-
- 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
- B43L21/04—Wiper holders
-
- 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
Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
The invention discloses a self-cleaning blackboard eraser, wherein 4 fixing blocks are respectively fixed on a blackboard eraser shell, a blackboard dust erasing mechanism is fixed on the fixing blocks, a cleaning felt belt mechanism is fixed on the fixing blocks, and a dust collecting mechanism is arranged on the blackboard eraser shell. The invention has the advantages that the felt strip embedded in the bottom of the blackboard eraser is changed into the felt strip which is wound on the rotating roller from head to tail, when the blackboard is erased, the felt strip outside the blackboard eraser body is used for erasing the blackboard, the cleaner felt strip in the blackboard eraser body is driven outside the blackboard eraser body, so that the blackboard is cleaner, the dirty felt strip is scrubbed by the cleaning brush, and dust falling off when the dirty felt strip is scrubbed by the cleaning brush, the blackboard eraser is cleaner, dust is greatly reduced, one surface of the felt strip is used for scrubbing the blackboard, the other surface of the felt strip is cleaned, and the use efficiency is improved.
Description
Technical Field
The invention relates to the technical field of blackboard eraser, in particular to a self-cleaning blackboard eraser.
Background
Blackboard is a common and necessary teaching tool in teaching. With the rapid development of modern teaching aids, electronic whiteboards or multimedia teaching are increasingly applied, but the application of blackboard is not reduced as the most basic teaching aid.
At present, most blackboard erasers commonly used by teachers in the teaching process are blackboard erasers made of simple felt plates, chalk dust on the surface of a blackboard is mainly wiped down by virtue of the felt in the use process, a part of chalk dust can be stuck on the felt plates, a part of chalk dust falls into a stacking groove at the bottom of the blackboard, more chalk dust cannot be adsorbed by the felt plates for a long time, the chalk dust is required to fall off by knocking at intervals, the blackboard erasers are troublesome to use and are used for a long time, the chalk dust can float in the air, and a large amount of chalk dust is inhaled into the blackboard erasers to cause injury to respiratory tracts and influence the health of a human body.
Disclosure of Invention
In order to overcome the technical defects, the invention provides the self-cleaning blackboard eraser which can clean a blackboard and can greatly reduce chalk dust in air.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a self-cleaning blackboard eraser, includes blackboard eraser shell, erases blackboard dust mechanism, clearance felt area mechanism, dust collection mechanism and fixed block, 4 the fixed block is fixed respectively on the blackboard eraser shell, it is in to erase blackboard dust mechanism fix on the fixed block, clearance felt area mechanism is fixed on the fixed block, dust collection mechanism installs on the blackboard eraser shell.
Further, the blackboard dust erasing mechanism comprises two rotating rollers, felt belts, a bottom plate, guide strips and pressure springs, wherein the rotating rollers are respectively arranged on the two fixed blocks through roller shafts on the rotating rollers, the felt belts are annular, the felt belts are sleeved outside the two rotating rollers, the bottom plate is arranged in the middle of the annular felt belts, four ends of the bottom plate are respectively fixed on the four fixed blocks, the guide strips are respectively and fixedly arranged on two sides of the bottom plate, guide grooves are respectively formed in two sides of the bottom plate, one ends of the two groups of pressure springs are respectively fixed on the two guide grooves, the other ends of the two groups of pressure springs are respectively and fixedly connected with the two guide strips, and the felt belts above the two guide strips are clamped between the two guide strips.
Further, clearance felt area mechanism includes drive roller, drive belt, fan axle, cleaning brush, support, guide arm, spring, supporting shoe, friction block, braking kicking block and guide roll, the drive roller has two, every the drive roller is passed through respectively the roller on the drive roller is installed two on the fixed block, two the fan axle is fixed respectively on the fixed block, two the guide roll is fixed respectively on the fixed block, the drive belt suit is in two the drive roller, two the fan axle and two on the guide roll, the cleaning brush is installed on the bottom of support, the cleaning brush with the felt area contacts, the drive belt passes through-hole on the support, the friction block is fixed on the supporting shoe, the supporting shoe is fixed on the guide arm, the upper portion of guide arm is fixed on the support, the spring housing is in on the guide arm, the braking kicking block has four, two respectively are fixed to the both sides of blackboard shell the braking kicking block.
Further, the dust collecting mechanism comprises a dust collecting box, a clamping plate, an air suction box body and two-way fan blades, wherein the dust collecting box is arranged at the bottom end of the blackboard eraser shell, the air suction box bodies are respectively arranged at two sides of the dust collecting box, the two-way fan blades are respectively arranged on the fan shaft, and the two-way fan blades are arranged in the air suction box bodies.
Further, a plurality of evenly distributed support bars are transversely arranged in the felt belt, the support bars can be made of plastic materials, the felt belt can be in an expanded state all the time through the support bars, the felt belt is prevented from shrinking from two sides of the rotating roller, and the felt belt is smooth.
Further, a dust guide plate is arranged at the upper part of the dust collection box, an air duct is arranged below the dust guide plate, and the dust collection plate is arranged at the upper end of the dust collection box; one side of each air suction box body is provided with a dust filtering net, and the other side of each air suction box body is provided with a ventilation silk screen; the bidirectional fan blade comprises an upper fan blade and a lower fan blade, an upper fan blade ratchet wheel is arranged in the middle of the upper fan blade, and a lower fan blade ratchet wheel is arranged in the middle of the lower fan blade.
The beneficial effects of the invention are as follows: the felt strip embedded in the bottom of the blackboard eraser is changed into the felt strip, the felt strip is wound on the rotating roller from head to tail, when the blackboard is erased, the felt strip positioned outside the blackboard eraser body is used for erasing the blackboard, when the felt strip is stained with a lot of chalk dust, the blackboard eraser is difficult to erase the blackboard cleanly, the felt strip is moved by hands through the rotating roller, so that the clean felt strip in the blackboard eraser body is driven outside the blackboard eraser body, the blackboard eraser body can be cleaner, the dirty felt strip is scrubbed by the cleaning brush, dust falling off when the blackboard is scrubbed by the cleaning brush and the dust falling off when the dirty felt strip is scrubbed by the cleaning brush is sucked into the dust collecting box through the rotation of the bidirectional fan blade, the dust is clean and sanitary, the felt strip is also enabled to be clean and circulate in sequence, the blackboard eraser is enabled to be cleaner, the dust is also greatly reduced, and the other side is cleaned when the felt strip is used for erasing the blackboard, and the use efficiency is improved.
Drawings
FIG. 1 is a schematic view of a self-cleaning blackboard eraser according to the present invention;
FIG. 2 is a partial cross-sectional view of a self-cleaning blackboard eraser according to the present invention;
FIG. 3 is a schematic top view of the self-cleaning blackboard eraser of FIG. 1 according to the present invention;
FIG. 4 is an enlarged schematic view of the self-cleaning blackboard eraser of the present invention shown in FIG. 3C;
FIG. 5 is a schematic top view of FIG. 1 of a self-cleaning blackboard eraser according to the present invention;
FIG. 6 is an overall schematic of a self-cleaning blackboard eraser of the present invention;
FIG. 7 is a schematic view of the structure of the upper blade in the self-cleaning blackboard eraser;
FIG. 8 is an enlarged schematic view of the self-cleaning blackboard eraser of the present invention A in FIG. 7;
FIG. 9 is a schematic view of the structure of the lower blade in the self-cleaning blackboard eraser;
FIG. 10 is a schematic view of the structure of the self-cleaning blackboard eraser of FIG. 9B;
FIG. 11 is a cross-sectional view of the felt belt in a self-cleaning blackboard eraser of the present invention;
in the figure, 1, a blackboard eraser shell; 2. a blackboard dust erasing mechanism; 201. a rotating roller; 202. felt belt; 2021. a support bar; 203. a bottom plate; 2031. a guide groove; 204. guiding edge strips; 205. a pressure spring; 3. cleaning a felt belt mechanism; 301. a driving roller; 302. a transmission belt; 303. a fan shaft; 304. cleaning brushes; 305. a bracket; 306. a guide rod; 307. a spring; 308. a support block; 309. a friction block; 310. a brake block; 311. a guide roller; 4. a dust collection mechanism; 401. a dust collection box; 4011. an air duct; 4012. a dust guide plate; 4013. a dust collection plate; 402. a clamping plate; 403. an air suction box body; 4031. a dust filtering net; 4032. an air-permeable silk screen; 404. bidirectional fan blades; 4041. an upper fan blade; 4042. a lower fan blade; 4043. a top blade ratchet wheel; 4044. a lower blade ratchet wheel; 5. and a fixed block.
Detailed Description
The invention will be clearly and completely described below with reference to the accompanying drawings, as shown in fig. 1, a self-cleaning blackboard eraser comprises a blackboard eraser shell 1, a blackboard dust removing mechanism 2, a cleaning felt belt mechanism 3, a dust collecting mechanism 4 and fixing blocks 5, wherein the fixing blocks 5 are respectively fixed on the blackboard eraser shell 1, the blackboard dust removing mechanism 2 is fixed on the fixing blocks 5, the cleaning felt belt mechanism 3 is fixed on the fixing blocks 5, and the dust collecting mechanism 4 is installed on the blackboard eraser shell 1.
As shown in fig. 2-3, the blackboard dust erasing mechanism 2 includes two rotating rollers 201, felt belts 202, a bottom plate 203, guide strips 204 and pressure springs 205, where each rotating roller 201 is installed on two fixing blocks 5 through a roller shaft on the rotating roller 201, the felt belts 202 are ring-shaped, the felt belts 202 are sleeved outside the two rotating rollers 201, the bottom plate 203 is installed in the middle of the ring-shaped felt belts 202, four ends of the bottom plate 203 are fixed on four fixing blocks 5, two sides of the bottom plate 203 are respectively and fixedly installed with the guide strips 204, two sides of the bottom plate 203 are respectively provided with guide grooves 2031, one ends of two groups of the pressure springs 205 are respectively and fixedly connected with two guide strips 2031, each group of the pressure springs 205 is composed of a plurality of uniformly distributed springs, and the felt belts 202 above the two guide strips 204 are clamped between the two groups of pressure springs 205.
As shown in fig. 2-3, the cleaning felt belt mechanism 3 includes a driving roller 301, a driving belt 302, a fan shaft 303, a cleaning brush 304, a support 305, a guide rod 306, a spring 307, a supporting block 308, a friction block 309, a braking top block 310 and a guide roller 311, wherein the driving roller 301 is two, each driving roller 301 is respectively installed on two fixing blocks 5 through a roller shaft on the driving roller 301, two fan shafts 303 are respectively fixed on the fixing blocks 5, two guide rollers 311 are respectively fixed on the fixing blocks 5, the driving belt 302 is sleeved on the two driving rollers 301, the two fan shafts 303 and the two guide rollers 311, the cleaning brush 304 is installed on the bottom of the support 305, the cleaning brush 304 is contacted with the felt belt 202, the driving belt 302 passes through a through hole on the support 305, the driving belt 302 is placed at the bottom end of the through hole, the friction block 309 is placed on the driving belt 302, the friction block 309 is fixedly connected with the supporting block 309, the guide rod 308 is fixedly connected with the supporting block 306, the other end of the supporting block 306 is fixedly connected with the spring 307, and the other end of the supporting block 307 is fixedly connected with the spring 307, and the other end of the supporting block is fixedly connected with the spring 307.
As shown in fig. 2, the dust collecting mechanism 4 includes a dust collecting box 401, a clamping plate 402, an air suction box 403 and two-way fan blades 404, the dust collecting box 401 is disposed at the bottom end of the blackboard eraser housing 1, the air suction box 403 is disposed at two sides of the dust collecting box 401, two-way fan blades 404 are respectively mounted on the fan shaft 303, and the two-way fan blades 404 are disposed in the air suction box 403.
As shown in fig. 11, a plurality of support bars 2021 are uniformly distributed in the felt belt 202, and the support bars 2021 may be made of plastic, so that the felt belt 202 is always in an expanded state by the support bars 2021, and the felt belt 202 is prevented from shrinking from two sides of the rotating roller 201, so that the felt belt 202 is smooth.
As shown in fig. 2, a dust guide plate 4012 is arranged at the upper part of the dust collection box 401, an air duct 4011 is arranged below the dust guide plate 4012, and the dust collection plate 4013 is arranged at the upper end of the dust collection box 401; one side of each air suction box body 403 is provided with a dust filtering net 4031, and the other side of each air suction box body 403 is provided with an air permeable silk screen 4032; the bidirectional fan blade 404 includes an upper fan blade 4041 and a lower fan blade 4042, as shown in fig. 7, an upper fan blade ratchet 4043 is disposed in the middle of the upper fan blade 4041, and a lower fan blade ratchet 4044 is disposed in the middle of the lower fan blade 4042, as shown in fig. 9.
Wherein the felt belt 202 is slightly higher than the drive roller 301.
Wherein the blackboard eraser shell 1 is used for placing a mechanism; the blackboard dust erasing mechanism 2 is used for erasing a blackboard; the felt belt cleaning mechanism 3 is used for cleaning dust on the felt belt 202; the dust collecting mechanism 4 is used for collecting the wiped dust; the fixed block 5 is used for a fixing mechanism; the rotating roller 201 is used for conveying felt belt 202; the felt belt 202 is used for erasing a blackboard; the bottom plate 203 is used for supporting the felt belt 202, so that the felt belt 202 is fully contacted with a blackboard; the guiding edge strips 204 are used for clamping the felt belt 202 and play a role in guiding the felt belt 202; the pressure spring 205 is used for compressing and resetting the guide edge strips 204; the driving roller 301 is a main power for conveying the driving belt 302; the driving belt 302 is used for moving the cleaning brush 304; the fan shaft 303 is used for conveying and guiding the driving belt 302 and driving the bidirectional fan blades 404 to rotate; the cleaning brush 304 is used for cleaning dust on the felt belt 202; the support 305 is used for moving with the cleaning brush 304; the guide rod 306 is used for lifting the friction block 309; the spring 307 is used for compressing and resetting the supporting block 308; the supporting block 308 is used for colliding with the brake top block 310 to enable the friction block 309 to rise; the friction block 309 is used for increasing friction force with the driving belt 302, so that the driving belt 302 moves along with the bracket 305; the brake jack block 310 is used for jacking up the supporting block 308; the guide roller 311 is used for guiding the driving belt 302; the dust box 401 is used for collecting the dust scraped off; the clamping plate 402 is used for clamping the dust box 401; the air suction box body 403 is used for better sucking dust into the dust collection box 401; the bidirectional fan blades 404 are used for blowing and sucking dust; the support bar 2021 is used for enabling the felt belt 202 to be in an expanded state all the time, so that the felt belt 202 is prevented from shrinking from two sides of the rotating roller 201, and the felt belt 202 is smooth; the guiding groove 2031 is used for guiding the edge strip 204 and the spring 205; the air duct 4011 is used for supplying air; the dust guide plate 4012 is used for guiding inflow of dust; the through holes on the dust collection plate 4013 are thick and thin, so that dust is not easy to fly out and the dust collection plate is used for collecting and flowing in the dust; the dust filtering net 4031 is used for ventilation and dust isolation; the ventilation wire 4032 is used for ventilation; the upper fan blades 4041 are used for rotating and blowing; the lower fan blades 4042 are used for rotating and blowing; the upper fan blade ratchet 4043 is used for unidirectional transmission; the lower fan blade ratchet 4044 is used for unidirectional transmission;
when the blackboard eraser is used, when the blackboard eraser is used to the right, the right side of the blackboard eraser is slightly lifted, the left side is pressed with force, the right side driving belt 302 does not contact the blackboard, the left side driving belt 302 drives the driving roller 301 to rotate anticlockwise, the driving belt 302 drives the fan shaft 303 to rotate, the upper fan blades 4041 in the bidirectional fan blades 404 do not rotate, the lower fan blades 4042 are stressed to rotate to wind out, the driving belt 302 drives the bracket 305 to move rightwards through friction force with the friction block 309, the cleaning brush 304 is driven to move rightwards and scrub the felt belt 202, then the supporting block 308 contacts the brake jacking block 310, the supporting block 308 is jacked up, the friction block 309 rises, the friction block 309 is separated from the driving belt 302, and the blackboard eraser is continuously moved rightwards;
when the blackboard eraser is used for erasing the blackboard to the left, the left side of the blackboard eraser is slightly lifted, the right side is pressed by force, the left side driving belt 302 does not contact the blackboard, the right side driving belt 302 drives the driving roller 301 to rotate clockwise, the driving belt 302 drives the fan shaft 303 to rotate, the upper fan blades 4041 in the two-way fan blades 404 are forced to rotate to wind out, the lower fan blades 4042 idle, meanwhile, the supporting blocks 308 are separated from the braking top blocks 310 by the friction force of the driving belt 302 and the support 305 and the elastic force of the springs 307, the friction blocks 309 are contacted with the driving belt 302, so that the driving belt 302 moves to the left side to scrub the felt belt 202 with the cleaning brush 304, and dust falls down both when the blackboard is erased and the felt belt 202 is erased by the cleaning brush 304;
when the felt belt 202 rubs dirt (meanwhile, the felt belt 202 inside is cleaned up by the cleaning brush 304 back and forth for a plurality of times) after the blackboard is cleaned up and forth for a plurality of times, the felt belt 202 is stirred by hands, the dirty felt belt 202 is stirred into the inside, and the clean felt belt 202 is replaced;
the fallen dust is sucked into the dust collecting box 401 by the wind of the bidirectional fan blades 404, and when the dust in the dust collecting box 401 needs to be poured out, the clamping plate 402 is taken out, and the dust collecting box 401 is taken out.
Claims (3)
1. A self-cleaning blackboard eraser is characterized in that: the blackboard eraser comprises a blackboard eraser shell (1), a blackboard dust erasing mechanism (2), a cleaning felt belt mechanism (3), a dust collecting mechanism (4) and fixed blocks (5), wherein the 4 fixed blocks (5) are respectively fixed on the blackboard eraser shell (1), the blackboard dust erasing mechanism (2) is fixed on the fixed blocks (5), the cleaning felt belt mechanism (3) is fixed on the fixed blocks (5), and the dust collecting mechanism (4) is installed on the blackboard eraser shell (1);
the blackboard dust erasing mechanism (2) comprises two rotating rollers (201), felt belts (202), a bottom plate (203), guide side strips (204) and pressure springs (205), wherein each rotating roller (201) is respectively arranged on two fixed blocks (5) through a roller shaft on the rotating roller (201), the felt belts (202) are annular, the felt belts (202) are sleeved outside the two rotating rollers (201), the bottom plate (203) is arranged in the middle of each annular felt belt (202), four ends of each bottom plate (203) are respectively fixed on the four fixed blocks (5), two sides of each bottom plate (203) are respectively fixedly provided with the guide side strips (204), two sides of each bottom plate (203) are respectively provided with a guide groove (2031), one end of each two groups of pressure springs (205) is respectively fixed on the two guide grooves (2031), the other end of each two groups of pressure springs (205) is respectively fixedly connected with the two guide side strips (204), and the felt strips (204) are clamped between the two guide side strips (204);
the cleaning felt belt mechanism (3) comprises a driving roller (301), a driving belt (302), a fan shaft (303), a cleaning brush (304), a support (305), guide rods (306), springs (307), supporting blocks (308), friction blocks (309), braking top blocks (310) and guide rollers (311), wherein two driving rollers (301) are arranged, each driving roller (301) is respectively arranged on two fixing blocks (5) through a roller shaft on the driving roller (301), the two fan shafts (303) are respectively fixed on the fixing blocks (5), the two guide rollers (311) are respectively fixed on the fixing blocks (5), the driving belt (302) is sleeved on the two driving rollers (301), the two fan shafts (303) and the two guide rollers (311), the cleaning brush (304) is arranged on the bottom of the support (305), the cleaning brush (304) is contacted with the felt belt (202), the driving belt (302) passes through the guide rods (308) on the support (305) and is fixed on the guide rods (308) on the support (308), the four braking jacking blocks (310) are sleeved on the guide rod (306), and two braking jacking blocks (310) are respectively fixed on two sides of the blackboard eraser shell (1);
the dust collection mechanism (4) comprises a dust collection box (401), a clamping plate (402), an air suction box body (403) and two-way fan blades (404), wherein the dust collection box (401) is placed at the bottom end of the blackboard eraser shell (1), the two sides of the dust collection box (401) are respectively provided with the air suction box bodies (403), the two-way fan blades (404) are respectively installed on the fan shaft (303), and the two-way fan blades (404) are arranged in the air suction box bodies (403).
2. A self-cleaning blackboard eraser according to claim 1, characterized in that: a plurality of support bars (2021) which are uniformly distributed are transversely arranged in the felt belt (202), the support bars (2021) are made of plastic, the felt belt (202) can be always in an expanded state through the support bars (2021) arranged, the felt belt (202) is prevented from shrinking from two sides of the rotating roller (201), and the felt belt (202) is smooth.
3. A self-cleaning blackboard eraser according to claim 1, characterized in that: the upper part of the dust collection box (401) is provided with a dust guide plate (4012), an air duct (4011) is arranged below the dust guide plate (4012), and the upper end of the dust collection box (401) is provided with a dust collection plate (4013); one side of each air suction box body (403) is provided with a dust filtering net (4031), and the other side of each air suction box body (403) is provided with an air permeable silk screen (4032); the bidirectional fan blade (404) comprises an upper fan blade (4041) and a lower fan blade (4042), an upper fan blade ratchet wheel (4043) is arranged in the middle of the upper fan blade (4041), and a lower fan blade ratchet wheel (4044) is arranged in the middle of the lower fan blade (4042).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811226754.3A CN109130641B (en) | 2018-10-22 | 2018-10-22 | Self-cleaning blackboard eraser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811226754.3A CN109130641B (en) | 2018-10-22 | 2018-10-22 | Self-cleaning blackboard eraser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109130641A CN109130641A (en) | 2019-01-04 |
| CN109130641B true CN109130641B (en) | 2024-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811226754.3A Active CN109130641B (en) | 2018-10-22 | 2018-10-22 | Self-cleaning blackboard eraser |
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| CN (1) | CN109130641B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112428730A (en) * | 2020-12-11 | 2021-03-02 | 安徽文香信息技术有限公司 | Blackboard eraser with dust collecting effect and using method thereof |
| CN114043814B (en) * | 2021-12-07 | 2024-03-08 | 南京亭宣文化传媒有限公司 | Education is with multi-functional education equipment and education is with multi-functional education equipment |
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| CN106739696A (en) * | 2017-01-24 | 2017-05-31 | 杨桢 | The automatic blackboard eraser cleared up and collect dust |
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|---|---|---|---|---|
| US4941225A (en) * | 1989-11-13 | 1990-07-17 | Liao Su Land | Automatic chalk-powder collecting device for blackboard eraser |
| CN2129228Y (en) * | 1992-03-24 | 1993-04-07 | 陶靖宇 | Chalk-collecting blackboard eraser |
| JPH0825892A (en) * | 1994-07-20 | 1996-01-30 | Tookado:Kk | Erasing device of white board or the like |
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| Publication number | Publication date |
|---|---|
| CN109130641A (en) | 2019-01-04 |
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