CN112895777A - Blackboard eraser capable of intelligently erasing and improving teaching efficiency - Google Patents
Blackboard eraser capable of intelligently erasing and improving teaching efficiency Download PDFInfo
- Publication number
- CN112895777A CN112895777A CN202110169202.9A CN202110169202A CN112895777A CN 112895777 A CN112895777 A CN 112895777A CN 202110169202 A CN202110169202 A CN 202110169202A CN 112895777 A CN112895777 A CN 112895777A
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- base
- blackboard eraser
- erasing
- spring
- teaching efficiency
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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
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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
- B43L21/02—Blackboard or slate cleaning devices with means for absorbing the chalk dust
Abstract
The invention relates to a blackboard eraser, in particular to a blackboard eraser capable of intelligently erasing and improving teaching efficiency. The invention aims to provide a blackboard eraser capable of automatically collecting chalk dust and carrying conveniently, and capable of intelligently erasing and improving teaching efficiency. The technical implementation scheme of the invention is as follows: the utility model provides an intelligence is erased and is improved teaching efficiency blackboard eraser, is equipped with detachable cotton brush bottom the base including base, cotton brush, fixed handle, rubber ring, stabilizing mean and dust absorption mechanism, and the base top is equipped with fixed handle, is connected with the rubber ring between fixed handle one side and the base, and base one side is equipped with stabilizing mean, is equipped with dust absorption mechanism on the base. Through the cooperation between stabilizing mean and the dust absorption mechanism, can realize convenient blackboard of erasing, can adsorb chalk dust is automatic simultaneously, avoids chalk dust to inhale people's internal.
Description
Technical Field
The invention relates to a blackboard eraser, in particular to a blackboard eraser capable of intelligently erasing and improving teaching efficiency.
Background
The blackboard is the indispensable facility in the teaching, need clean the blackboard before class, and present blackboard eraser adopts manually to clean more, wastes time and energy, also makes the classroom dust fly upward easily, influences the inside environment in classroom.
Therefore, in order to solve the above problems, a blackboard eraser capable of automatically collecting chalk dust and carrying conveniently is developed to improve teaching efficiency.
Disclosure of Invention
The invention aims to overcome the defects that the existing blackboard eraser is mostly cleaned by manual erasing, and wastes time and labor, and provides an intelligent erasing blackboard eraser capable of automatically collecting chalk dust and being convenient to carry, so that the teaching efficiency is improved.
The technical implementation scheme of the invention is as follows: the utility model provides an intelligence is erased and is improved teaching efficiency blackboard eraser, is equipped with detachable cotton brush bottom the base including base, cotton brush, fixed handle, rubber ring, stabilizing mean and dust absorption mechanism, and the base top is equipped with fixed handle, is connected with the rubber ring between fixed handle one side and the base, and base one side is equipped with stabilizing mean, is equipped with dust absorption mechanism on the base.
As the improvement of above-mentioned scheme, stabilizing mean all is equipped with two first fixing bases including first fixing base, first commentaries on classics board, first spring and pull ring between two first fixing bases equal rotary type is connected with first commentaries on classics board, all is equipped with first spring between first commentaries on classics board and the first fixing base, all is equipped with the pull ring on the first commentaries on classics board.
As the improvement of above-mentioned scheme, dust absorption mechanism is including first contact switch, second contact switch, dysmorphism groove, the wind-guiding frame, the pivot is fanned to the area, transmission assembly, servo motor and be built by contract, fixed handle one side is equipped with first contact switch and second contact switch, second contact switch is located first contact switch one side, base one side is equipped with the wind-guiding frame, the wind-guiding frame both sides all are equipped with the dysmorphism groove, the equal rotary type in base rear portion both sides is connected with the pivot of fanning to the area, be connected with transmission assembly between the pivot of fanning to the area, base one side is equipped with servo motor, the pivot is fanned to the area of servo motor output shaft and one side is connected.
As the improvement of above-mentioned scheme, still including scraping dirt mechanism, it is including the mount to scrape dirt mechanism, the telescopic link, the spacer pin, first sliding ring, the second spring, second sliding ring and elasticity stay cord, dysmorphism inslot side all is equipped with the mount, the mount both sides all are connected with the telescopic link, the telescopic link outside all is equipped with the spacer pin, all be equipped with the second spring between the mount of spacer pin and homonymy, the equal slidingtype in wind-guiding frame both sides is connected with the second sliding ring, all be equipped with first sliding ring between the telescopic link outside of vertical homonymy, all be equipped with the elasticity stay cord between second sliding ring both sides and the base.
As the improvement of above-mentioned scheme, still including guiding mechanism, guiding mechanism is including the second fixing base, second commentaries on classics board and second stay cord, dysmorphism inslot roof all is equipped with three second fixing base, the equal rotary type of second fixing base is connected with the second commentaries on classics board, all be connected with the torsional spring between second fixing base and the second commentaries on classics board, all be equipped with wire rope between two adjacent second commentaries on classics boards, the spacer pin of right front side and the spacer pin of left rear side all are connected with the second stay cord, the second stay cord all changes the board with the second that is closest to and connects.
As the improvement of above-mentioned scheme, still including dust fall mechanism, dust fall mechanism all is equipped with the storage water tank including storage water tank, atomizing spray tube, fixed plate, kicking block, valve and third spring, and the base both sides all are equipped with the storage water tank, and storage water tank bottom both sides all are connected with the atomizing spray tube, and first slip ring both sides all are connected with the fixed plate, and fixed plate one side all is equipped with the kicking block, and equal rotary type is connected with the valve on the atomizing spray tube, all is equipped with the third spring between the atomizing spray tube of valve.
As the improvement of the scheme, the buffer mechanism comprises slide bars, rubber pads and fourth springs, the slide bars are evenly arranged on one side of the top of the base, the rubber pads are connected between the slide bars in a sliding mode, and the fourth springs are evenly arranged between the bottoms of the rubber pads and the base.
As an improvement of the above scheme, the device further comprises a control box, the control box is arranged in the middle of the top of the fixed handle, a switching power supply, a control module and a power module are installed in the control box, the switching power supply supplies power to the whole device, the output end of the switching power supply is electrically connected with the power module, the power module is connected with a power main switch through a circuit, the control module is electrically connected with the power module, and the control module is connected with a DS1302 clock circuit and a 24C02 circuit; the starting switch, the first contact switch and the second contact switch are electrically connected with the control module, and the servo motor is connected with the control module through a peripheral circuit.
The invention has the following advantages: 1. through the cooperation between stabilizing mean and the dust absorption mechanism, can realize convenient blackboard of erasing, can adsorb chalk dust is automatic simultaneously, avoids chalk dust to inhale people's internal.
2. Through scraping the cooperation between dirt mechanism and the dust fall mechanism, can scrape the chalk dust automatically and take out, can play the effect of dust fall afterwards.
Drawings
Fig. 1 is a schematic perspective view of a first perspective structure according to the present invention.
Fig. 2 is a perspective view of a second perspective structure according to the present invention.
Fig. 3 is a schematic perspective view of the stabilizing mechanism of the present invention.
Fig. 4 is a schematic perspective view of the dust suction mechanism of the present invention.
Fig. 5 is a first partial sectional perspective view of the dust suction mechanism of the present invention.
Fig. 6 is a schematic second partial sectional perspective view of the vacuum cleaner mechanism of the present invention.
Fig. 7 is a schematic perspective view of the dust scraping mechanism of the present invention.
Fig. 8 is a schematic perspective view of the guide mechanism of the present invention.
Fig. 9 is a schematic cross-sectional perspective view of the dust fall mechanism of the present invention.
Fig. 10 is a perspective view of the mitigation mechanism of the present invention.
FIG. 11 is a circuit block diagram of the present invention.
Fig. 12 is a schematic circuit diagram of the present invention.
Number designation in the figures: 1-base, 2-cotton brush, 3-fixed handle, 4-rubber ring, 5-control box, 6-stabilizing mechanism, 61-first fixed seat, 62-first rotating plate, 63-first spring, 64-pull ring, 7-dust-absorbing mechanism, 71-first contact switch, 72-second contact switch, 73-special-shaped groove, 74-wind guide frame, 75-fan rotating shaft, 76-transmission component, 77-servo motor, 78-cover, 8-dust-scraping mechanism, 81-fixed seat, 82-telescopic rod, 83-spacing pin, 84-first sliding ring, 85-second spring, 86-second sliding ring, 87-elastic pull rope, 9-guiding mechanism, 91-second fixed seat, 92-second rotating plate, 93-a second pull rope, 10-a dust falling mechanism, 101-a water storage tank, 102-an atomizing spray pipe, 103-a fixing plate, 104-a top block, 105-a valve, 106-a third spring, 11-a relieving mechanism, 111-a sliding rod, 112-a rubber pad and 113-a fourth spring.
Detailed Description
The following further describes the technical solution with reference to specific embodiments, and it should be noted that: the words upper, lower, left, right, and the like used herein to indicate orientation are merely for the location of the illustrated structure in the corresponding figures. The serial numbers of the parts are themselves numbered herein, for example: first, second, etc. are used solely to distinguish one from another as to objects described herein, and do not have any sequential or technical meaning. The application states that: the connection and coupling, unless otherwise indicated, include both direct and indirect connections (couplings).
Example 1
The blackboard eraser capable of intelligently erasing and improving teaching efficiency comprises a base 1, a cotton cloth brush 2, a fixed handle 3, a rubber ring 4, a stabilizing mechanism 6 and a dust collection mechanism 7, wherein the detachable cotton cloth brush 2 is arranged at the bottom of the base 1, the fixed handle 3 is arranged at the top of the base 1, the rubber ring 4 is connected between the right side of the fixed handle 3 and the base 1, the stabilizing mechanism 6 is arranged at the lower part of the base 1, and the dust collection mechanism 7 is arranged on the base 1.
Stabilizing mean 6 all is equipped with two first fixing bases 61 including first fixing base 61, first revolving plate 62, first spring 63 and pull ring 64, both sides around base 1, and equal rotary type is connected with first revolving plate 62 between two first fixing bases 61, all is equipped with first spring 63 between first revolving plate 62 and the first fixing base 61, all is equipped with pull ring 64 on the first revolving plate 62.
When people need to erase the blackboard, the device can be used, the fixed handle 3 is held by hands, the cotton cloth brush 2 is attached to the blackboard for erasing, then the main switch of the power supply is pressed down to electrify the device, the first contact switch 71 is pressed down, the first contact switch 71 sends out a signal, the control module receives the signal and controls the output shaft of the servo motor 77 to rotate to drive the rotating shaft 75 with the fan and the transmission component 76 to rotate, so that the rotating shaft 75 with the fan absorbs chalk dust into the bag cover 78, when people need to replace the cotton cloth brush 2, the pull ring 64 and the first rotating plate 62 are opened, the first spring 63 is twisted, the old cotton cloth brush 2 is taken down, then the new cotton cloth brush 2 is placed back, then the hands are loosened, under the effect of first spring 63, drive pull ring 64 and first rotor 62 and rotate and reset and block cotton brush 2 to it fixes cotton brush 2 to be convenient for. After the blackboard is erased, people press the second contact switch 72, the second contact switch 72 sends a signal, the control module receives the signal and then controls the output shaft of the servo motor 77 to stop rotating, and then presses the power main switch again to power off the device. When the chalk dust needs to be taken out, the bag cover 78 is opened, then the chalk dust is taken out, and then the bag cover 78 is closed.
Example 2
On the basis of embodiment 1, as shown in fig. 7 to 10, the dust scraping mechanism 8 is further included, the dust scraping mechanism 8 includes a fixing frame 81, a telescopic rod 82, a limiting pin 83, a first sliding ring 84, a second spring 85, a second sliding ring 86 and an elastic pull rope 87, the fixing frame 81 is disposed inside the special-shaped groove 73, the telescopic rods 82 are connected to the front and rear sides of the fixing frame 81, the limiting pin 83 is disposed outside the telescopic rod 82, the second spring 85 is disposed between the limiting pin 83 and the fixing frame 81 on the same side, the second sliding ring 86 is slidably connected to the left and right sides of the air guide frame 74, the first sliding ring 84 is disposed between the outer sides of the telescopic rods 82 on the same longitudinal side, and the elastic pull rope 87 is disposed between the left and right sides of the front portion of the second sliding ring 86.
When wind power is used for adsorption, the first sliding ring 84 and the limiting pin 83 move inwards, the second spring 85 is compressed, the first sliding ring 84 scrapes chalk dust inwards, the chalk dust is collected inwards, meanwhile, the second sliding ring 86 moves backwards, the elastic pull rope 87 is stretched, the chalk dust is scraped backwards and collected, and when the wind stops adsorption, the first sliding ring 84 and the limiting pin 83 are driven to move outwards to reset under the action of the second spring 85 and the elastic pull rope 87, and the first sliding ring 84 moves forwards to reset.
Still including guiding mechanism 9, guiding mechanism 9 is including second fixing base 91, second commentaries on classics board 92 and second stay cord 93, the roof all is equipped with three second fixing base 91 in the dysmorphism groove 73, the equal rotary type of second fixing base 91 is connected with second commentaries on classics board 92, all be connected with the torsional spring between second fixing base 91 and the second commentaries on classics board 92, adjacent two second commentaries on classics boards 92 all are equipped with wire rope between, the spacer pin 83 of right front side and the spacer pin 83 of left rear side all are connected with second stay cord 93, second stay cord 93 all changes board 92 with the second that is closest to and connects.
When the limiting pin 83 moves towards the inner side, the second rotating plate 92 is driven to rotate through the second pull rope 93, so that chalk dust is moved towards the inner side, meanwhile, under the action of the steel wire rope, other second rotating plates 92 rotate, the torsion spring is twisted, the limiting pin 83 moves towards the outer side to loosen the second pull rope 93, and under the action of the torsion spring, the second rotating plate 92 is driven to rotate and reset.
Still including dust fall mechanism 10, dust fall mechanism 10 is including storage water tank 101, atomizing spray tube 102, fixed plate 103, kicking block 104, valve 105 and third spring 106, the 1 upper portion left and right sides of base all is equipped with storage water tank 101, both sides all are connected with atomizing spray tube 102 around storage water tank 101 bottom, both sides all are connected with fixed plate 103 around first slip ring 84, fixed plate 103 front side all is equipped with kicking block 104, equal rotary type is connected with valve 105 on the atomizing spray tube 102, all be equipped with third spring 106 between atomizing spray tube 102 of valve 105 and homonymy.
When needing to carry out the dust fall, in pouring into storage water tank 101 with water, first slip ring 84 removes and drives fixed plate 103 and kicking block 104 and remove, when kicking block 104 and valve 105 contact, makes valve 105 rotate and opens, and third spring 106 is twisted round, and the water blowout carries out the dust fall this moment, and when kicking block 104 and valve 105 separated, under the effect of third spring 106, drives valve 105 and rotates and reset and close.
The damping mechanism 11 is further included, the damping mechanism 11 includes a sliding rod 111, a rubber pad 112 and a fourth spring 113, the sliding rod 111 is evenly arranged on the rear side of the top of the base 1, the rubber pad 112 is connected between the sliding rods 111 in a sliding manner, and the fourth spring 113 is evenly arranged between the bottom of the rubber pad 112 and the base 1.
Let when people use this equipment, hand and the laminating of rubber pad 112 for rubber pad 112 reciprocates, makes the 113 adaptability deformations of fourth spring, can play the effect of buffering like this.
Example 3
On the basis of embodiment 1, as shown in fig. 1, 11 and 12, the device further comprises a control box 5, the control box 5 is arranged in the middle of the top of the fixed handle 3, a switching power supply, a control module and a power supply module are installed in the control box 5, the switching power supply supplies power to the whole device, the output end of the switching power supply is electrically connected with the power supply module, the power supply module is connected with a power supply main switch through a circuit, the control module is electrically connected with the power supply module, and the control module is connected with a DS1302 clock circuit and a 24C02 circuit; the start switch, the first contact switch 71 and the second contact switch 72 are electrically connected with the control module, and the servo motor 77 is connected with the control module through a peripheral circuit.
The above-mentioned embodiments are merely preferred embodiments of the present invention, which are not intended to limit the scope of the present invention, and therefore, all equivalent changes made by the contents of the claims of the present invention should be included in the claims of the present invention.
Claims (8)
1. The utility model provides an intelligence is erased and is improved teaching efficiency blackboard eraser, characterized by, including base (1), cotton brush (2), fixed handle (3), rubber ring (4), stabilizing mean (6) and dust absorption mechanism (7), base (1) bottom is equipped with detachable cotton brush (2), base (1) top is equipped with fixed handle (3), be connected with rubber ring (4) between fixed handle (3) one side and base (1), base (1) one side is equipped with stabilizing mean (6), be equipped with dust absorption mechanism (7) on base (1).
2. The blackboard eraser capable of intelligently erasing and improving teaching efficiency as claimed in claim 1, wherein the stabilizing mechanism (6) comprises a first fixed seat (61), a first rotating plate (62), a first spring (63) and a pull ring (64), two first fixed seats (61) are arranged on both sides of the base (1), the first rotating plate (62) is rotatably connected between the two first fixed seats (61), the first spring (63) is arranged between the first rotating plate (62) and the first fixed seat (61), and the pull ring (64) is arranged on the first rotating plate (62).
3. The blackboard eraser capable of intelligently erasing and improving teaching efficiency according to claim 2, wherein the dust collection mechanism (7) comprises a first contact switch (71), a second contact switch (72), a special-shaped groove (73), an air guide frame (74), a fan-provided rotating shaft (75), a transmission component (76), a servo motor (77) and a cover (78), the first contact switch (71) and the second contact switch (72) are arranged on one side of the fixed handle (3), the second contact switch (72) is positioned on one side of the first contact switch (71), the air guide frame (74) is arranged on one side of the base (1), the special-shaped grooves (73) are arranged on two sides of the air guide frame (74), the fan-provided rotating shaft (75) is rotatably connected on two sides of the rear portion of the base (1), the transmission component (76) is connected between the fan-provided rotating shafts (75), the servo motor (77) is arranged on one side of the base (1), an output shaft of the servo motor (77) is connected with, the top of one side of the base (1) is covered with a bag cover (78).
4. The blackboard eraser capable of intelligently erasing and improving teaching efficiency according to claim 3, further comprising a dust scraping mechanism (8), wherein the dust scraping mechanism (8) comprises a fixing frame (81), a telescopic rod (82) and a limit pin (83), first slip ring (84), second spring (85), second slip ring (86) and elasticity stay cord (87), dysmorphism groove (73) inboard all is equipped with mount (81), mount (81) both sides all are connected with telescopic link (82), telescopic link (82) outside all is equipped with spacer pin (83), all be equipped with second spring (85) between mount (81) of spacer pin (83) and homonymy, the equal sliding connection in wind-guiding frame (74) both sides has second slip ring (86), all be equipped with first slip ring (84) between the telescopic link (82) the outside of vertical homonymy, all be equipped with elasticity stay cord (87) between second slip ring (86) both sides and base (1).
5. The blackboard eraser capable of intelligently erasing and improving teaching efficiency according to claim 4, characterized by further comprising a guide mechanism (9), wherein the guide mechanism (9) comprises a second fixed seat (91), a second rotating plate (92) and a second pull rope (93), three second fixed seats (91) are arranged on the inner top wall of the special-shaped groove (73), the second fixed seats (91) are rotatably connected with the second rotating plate (92), torsion springs are connected between the second fixed seats (91) and the second rotating plate (92), steel wire ropes are arranged between every two adjacent second rotating plates (92), the limiting pin (83) on the right front side and the limiting pin (83) on the left rear side are respectively connected with the second pull rope (93), and the second pull ropes (93) are connected with the closest second rotating plate (92).
6. The blackboard eraser capable of intelligently erasing and improving teaching efficiency according to claim 5, characterized by further comprising a dust falling mechanism (10), wherein the dust falling mechanism (10) comprises a water storage tank (101), an atomizing nozzle (102), a fixing plate (103), a top block (104), a valve (105) and a third spring (106), the water storage tank (101) is arranged on each of two sides of the base (1), the atomizing nozzle (102) is connected to each of two sides of the bottom of the water storage tank (101), the fixing plate (103) is connected to each of two sides of the first sliding ring (84), the top block (104) is arranged on one side of the fixing plate (103), the valve (105) is rotatably connected to each of the atomizing nozzles (102), and the third spring (106) is arranged between the valve (105) and the atomizing nozzle (102) on.
7. The blackboard eraser capable of intelligently erasing and improving teaching efficiency as claimed in claim 6, further comprising a relieving mechanism (11), wherein the relieving mechanism (11) comprises a sliding rod (111), a rubber pad (112) and a fourth spring (113), the sliding rod (111) is uniformly arranged on one side of the top of the base (1), the rubber pad (112) is slidably connected between the sliding rods (111), and the fourth spring (113) is uniformly arranged between the bottom of the rubber pad (112) and the base (1).
8. The blackboard eraser capable of intelligently erasing and improving teaching efficiency as claimed in claim 7, further comprising a control box (5), wherein the control box (5) is arranged in the middle of the top of the fixed handle (3), a switching power supply, a control module and a power module are installed in the control box (5), the switching power supply supplies power to the whole device, the output end of the switching power supply is electrically connected with the power module, the power module is connected with a power main switch through a line, the control module is electrically connected with the power module, and the control module is connected with a DS1302 clock circuit and a 24C02 circuit; the starting switch, the first contact switch (71) and the second contact switch (72) are electrically connected with the control module, and the servo motor (77) is connected with the control module through a peripheral circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110169202.9A CN112895777A (en) | 2021-02-07 | 2021-02-07 | Blackboard eraser capable of intelligently erasing and improving teaching efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110169202.9A CN112895777A (en) | 2021-02-07 | 2021-02-07 | Blackboard eraser capable of intelligently erasing and improving teaching efficiency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112895777A true CN112895777A (en) | 2021-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110169202.9A Withdrawn CN112895777A (en) | 2021-02-07 | 2021-02-07 | Blackboard eraser capable of intelligently erasing and improving teaching efficiency |
Country Status (1)
| Country | Link |
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| CN (1) | CN112895777A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115320275A (en) * | 2022-08-29 | 2022-11-11 | 刘耕 | Blackboard chalk groove |
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| CN207291439U (en) * | 2017-05-25 | 2018-05-01 | 桂涛 | A kind of blackboard for education is wiped |
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| CN109080347A (en) * | 2018-08-31 | 2018-12-25 | 安徽众高信息技术有限责任公司 | A kind of automatic dust-absorption eraser |
| CN208714780U (en) * | 2018-07-25 | 2019-04-09 | 许雪连 | A kind of teaching blackboard eraser for effectivelying prevent chalk dust to drift |
| CN210174492U (en) * | 2019-05-30 | 2020-03-24 | 塔里木大学 | Automatic dust-absorbing blackboard eraser device |
| CN211308063U (en) * | 2019-10-10 | 2020-08-21 | 陈国旺 | Dust-absorbing and spraying blackboard eraser |
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2021
- 2021-02-07 CN CN202110169202.9A patent/CN112895777A/en not_active Withdrawn
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201931885U (en) * | 2011-01-18 | 2011-08-17 | 汲文轩 | Dust-sucking blackboard eraser |
| CN205326620U (en) * | 2015-12-21 | 2016-06-22 | 华北理工大学 | Electric chalk -dust absorbing type blackboard eraser |
| CN206306691U (en) * | 2016-08-04 | 2017-07-07 | 岳润辉 | A kind of dust-proof blackboard eraser |
| CN106956540A (en) * | 2017-03-12 | 2017-07-18 | 安徽机电职业技术学院 | A kind of classroom dust-proof blackboard eraser |
| CN207291439U (en) * | 2017-05-25 | 2018-05-01 | 桂涛 | A kind of blackboard for education is wiped |
| CN108407510A (en) * | 2018-01-24 | 2018-08-17 | 上海瓜齐电子科技有限公司 | A kind of blackboard eraser for teaching |
| CN208714780U (en) * | 2018-07-25 | 2019-04-09 | 许雪连 | A kind of teaching blackboard eraser for effectivelying prevent chalk dust to drift |
| CN109080347A (en) * | 2018-08-31 | 2018-12-25 | 安徽众高信息技术有限责任公司 | A kind of automatic dust-absorption eraser |
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| CN211308063U (en) * | 2019-10-10 | 2020-08-21 | 陈国旺 | Dust-absorbing and spraying blackboard eraser |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115320275A (en) * | 2022-08-29 | 2022-11-11 | 刘耕 | Blackboard chalk groove |
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