CN110525094B - Blackboard eraser and using method thereof - Google Patents
Blackboard eraser and using method thereof Download PDFInfo
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- CN110525094B CN110525094B CN201910851161.4A CN201910851161A CN110525094B CN 110525094 B CN110525094 B CN 110525094B CN 201910851161 A CN201910851161 A CN 201910851161A CN 110525094 B CN110525094 B CN 110525094B
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- blackboard
- wiping roller
- powder
- chalk dust
- powder collecting
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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
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Abstract
The invention discloses a blackboard eraser and a use method thereof, belonging to the field of teaching tools, the blackboard eraser comprises a powder collecting outer box, a first erasing roller and a second erasing roller which are all arranged along the length direction of a blackboard, a powder collecting cavity is formed among the outer wall of the first erasing roller, the outer wall of the second erasing roller and the inner wall of the powder collecting outer box, a powder throwing concentration channel is formed among the outer wall of the first erasing roller, the outer wall of the second erasing roller and a writing surface of the blackboard, the powder throwing concentration channel is communicated with the powder collecting cavity, when the blackboard eraser moves upwards along the height direction of the blackboard to erase the blackboard, chalk dust wiped from the writing surface of the blackboard is thrown down into the powder throwing concentration channel by the first erasing roller, and the chalk dust is thrown down into the powder collecting cavity by the second erasing roller. The blackboard eraser disclosed by the invention can realize that the chalk dust wiped from the writing surface of the blackboard can be immediately blocked and sent into the chalk dust collecting cavity to be concentrated, thereby avoiding the chalk dust from leaking and flying to a greater extent and being more sanitary.
Description
Technical Field
The invention relates to the field of teaching aids, in particular to a blackboard eraser and a using method thereof.
Background
In the process of education and teaching, the flexibility and the convenience of blackboard writing teaching make a plurality of teachers all be used to writing teaching with the chalk on the blackboard at the teaching in-process, and the chalk word need use the blackboard eraser to clean the cleanness after writing, but the in-process of the blackboard eraser of most ordinary blackboard erasers of existence wastes time and energy, leads to the dust to fly away easily, not only is not convenient for clean, still has very big threat to teachers and students' healthy. Therefore, a blackboard eraser device and an automatic blackboard eraser are provided, and chalk marks can be conveniently erased.
However, the existing blackboard eraser device and automatic blackboard eraser usually comprise an outer casing and a wiping block or wiping roller arranged in the outer casing, the wiping block or wiping roller needs to extend out of the outer casing to contact with the writing surface of the blackboard, a gap is inevitably formed between the wiping block or wiping roller and the writing surface of the blackboard, and a gap is inevitably formed between the wiping block or wiping roller and the outer casing, during the wiping process, the chalk dust will fly from all directions as long as the wiping block or wiping roller wipes the writing surface of the blackboard, the chalk dust wiped from the writing surface of the blackboard cannot be timely fed into the chalk dust accumulating groove (even if the blackboard eraser with a fan for sucking dust is arranged, the wiped chalk dust flying from all gaps can not be sucked, and the blackboard eraser with a dust sucking mechanism such as a fan has a complicated structure and poor stability, and especially works in an environment filled with chalk dust, the motor and the fan are extremely easy to be stuck, high production cost and maintenance cost), the chalk dust can still flow out from the gaps between the wiping block or wiping roller and the writing surface of the blackboard and between the wiping block or wiping roller and the outer shell, and teachers and students who cannot get close to the blackboard eraser device or the automatic blackboard eraser can still avoid sucking more chalk dust.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a blackboard eraser and a use method thereof, so that chalk dust wiped from a writing surface of the blackboard can be immediately blocked and sent into a chalk dust collecting cavity to be concentrated, the chalk dust is prevented from leaking and flying to a greater extent, and the blackboard eraser is more sanitary.
The technical scheme adopted by the invention is as follows:
the invention provides a blackboard eraser which comprises a powder collecting outer box, a first wiping roller and a second wiping roller, wherein the powder collecting outer box, the first wiping roller and the second wiping roller are arranged along the length direction of a blackboard; the first wiping roller and the second wiping roller are both rotatably arranged inside the powder collecting outer box, and the first wiping roller is positioned above the second wiping roller; a powder collecting cavity is formed among the outer wall of the first wiping roller, the outer wall of the second wiping roller and the inner wall of the powder collecting outer box, a powder throwing and concentrating channel is formed among the outer wall of the first wiping roller, the outer wall of the second wiping roller and the writing surface of the blackboard, and the powder throwing and concentrating channel is communicated with the powder collecting cavity; when the blackboard eraser is followed the direction of height of blackboard removes upwards and cleans during the blackboard, first clean roller with the second cleans the roller and cleans in proper order the writing surface of blackboard, first clean roller with the rotation direction of second clean roller is opposite, first clean roller will follow the chalk dust that cleans down on the blackboard writing surface is thrown away and falls extremely in getting rid of the powder and concentrating the passageway, the second cleans the roller will the chalk dust is thrown away and falls in the collection powder chamber.
As a further improvement of the present scheme, the inside of the powder collecting outer box is provided with a first powder scraping plate and a second powder scraping plate, the first powder scraping plate is used for scraping the chalk dust on the surface of the first wiping roller to the powder collecting cavity, and the second powder scraping plate is used for scraping the chalk dust on the surface of the second wiping roller to the powder collecting cavity.
As a further improvement of the scheme, gear bars are respectively arranged on two sides of the blackboard along the height direction of the blackboard, the first wiping roller and the second wiping roller are in transmission through a gear set, and the gear set is in meshing transmission with the gear bars.
As a further improvement of the scheme, the gear set comprises a driving gear arranged on the first wiping roller and a driven gear arranged on the second wiping roller, the driving gear is meshed with the driven gear, and when the blackboard eraser moves upwards along the height direction of the blackboard to wipe the blackboard, the driving gear is meshed with the gear strip for transmission.
As a further improvement of the present scheme, two ends of the powder collecting outer box are respectively provided with a limiting cover plate, one end of the limiting cover plate far away from the powder collecting outer box is provided with a limiting part, the limiting part extends to the non-tooth back surface of the gear rack, and the limiting part is in clearance fit with the non-tooth back surface.
As a further improvement of the present scheme, the blackboard eraser further comprises a dust pushing plate disposed in the dust collecting cavity, and the dust pushing plate is used for pushing out the chalk dust deposited in the dust collecting cavity from the dust collecting cavity.
As a further improvement of the scheme, two sides of the dust pushing plate are respectively connected with a pull rope, one end of each pull rope, which is far away from the dust pushing plate, extends to the outside of the dust collecting cavity, and when one pull rope is continuously pulled, the dust pushing plate moves along the length direction of the dust collecting cavity to push out the chalk dust deposited in the dust collecting cavity from the dust outlet of the dust collecting cavity; when the other pulling rope is continuously pulled, the ash pushing plate is pulled back to the original position in the powder collecting cavity.
As a further improvement of this aspect, the first wiping roller includes a center shaft and a wiping portion provided outside the center shaft, the wiping portion including a brush portion and a cloth wiping portion.
As a further improvement of the technical scheme, the blackboard eraser further comprises a water pressing bag arranged on the central shaft, a water delivery pipe communicated with a water outlet of the water pressing bag, and a plurality of water spray nozzles communicated with the inside of the water delivery pipe, wherein the central shaft is hollow, the water delivery pipe and the plurality of water spray nozzles are arranged inside the central shaft, and water spray ends of the plurality of water spray nozzles respectively penetrate through the outer wall of the central shaft and extend to the position of the hairbrush part.
The use method of the blackboard eraser comprises the following steps:
s101: pulling the powder collecting outer box to the outer side of the writing surface at the bottom of the blackboard from the lower part of the blackboard;
s102: pushing the powder collecting outer box in the direction close to the writing surface of the blackboard to enable the first wiping roller and the second wiping roller to be in contact with the writing surface of the blackboard, and pushing the powder collecting outer box upwards along the height direction of the blackboard;
s103: the driving gear is meshed with the gear rack to rotate, so that the first wiping roller rotates downwards along the writing surface of the blackboard to wipe the writing surface of the blackboard, and throws the wiped chalk dust into the dust throwing concentration channel, the second wiping roller rotates upwards along the writing surface of the blackboard to wipe the writing surface of the blackboard wiped by the first wiping roller and throws the wiped chalk dust into the dust throwing concentration channel, and meanwhile, the second wiping roller throws the wiped chalk dust and the chalk dust thrown by the first wiping roller into the dust throwing concentration channel into the dust collecting cavity;
s104: the first powder scraping plate scrapes the chalk dust adhered to the surface of the first wiping roller into the powder collecting cavity, and the second powder scraping plate scrapes the chalk dust adhered to the surface of the second wiping roller into the powder collecting cavity;
s105: extruding a water pressing bag to enable water in the water pressing bag to be conveyed to a water spraying nozzle through a water conveying pipe, spraying water mist to a brush part of the first wiping roller through the water spraying nozzle, and enabling the brush part to brush and remove stains on the writing surface of the blackboard;
s106: after the powder collecting outer box is pushed to the top of the blackboard, the powder collecting outer box is pulled backwards, the first wiping roller and the second wiping roller are separated from the writing surface of the blackboard, the powder collecting outer box is pushed downwards, the powder collecting outer box is moved to the original position below the blackboard, and the blackboard is wiped completely;
s107: when the chalk dust deposited in the chalk dust collecting cavity needs to be removed, a pull rope at one end of the chalk dust pushing plate is pulled, so that the chalk dust pushing plate moves along the length direction of the chalk dust collecting cavity to push the deposited chalk dust together and push the chalk dust out through a dust outlet of the chalk dust collecting cavity; and pulling the pull rope at the other end of the ash pushing plate to reversely move the ash pushing plate to the original position.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a blackboard eraser, wherein a powder collecting outer box, a first wiping roller and a second wiping roller are arranged along the length direction of a blackboard, a powder collecting cavity is formed among the outer wall of the first wiping roller, the outer wall of the second wiping roller and the inner wall of the powder collecting outer box, a powder throwing concentration channel is formed among the outer wall of the first wiping roller, the outer wall of the second wiping roller and a writing surface of the blackboard, when the blackboard eraser moves upwards along the height direction of the blackboard to wipe the blackboard (the gravity direction of chalk dust is reversed, the chalk dust can be collected to a greater extent when falling due to the gravity action in the wiping process, the chalk dust is prevented from falling off), the first wiping roller rotates downwards along the writing surface of the blackboard to wipe the writing surface of the blackboard, the wiped chalk dust can be immediately rolled downwards along the outer wall of the first wiping roller (the rolling direction is along the gravity direction of the chalk dust, the chalk dust is immediately rolled into the wiping direction and then is thrown into the powder throwing concentration channel, simultaneously, the second wiping roller is in first wiping roller below, the second wiping roller turns to and turns to opposite with first wiping roller, upwards rotate along the writing surface of blackboard and clean the writing surface of blackboard, carry out the secondary to the blackboard writing surface after first wiping roller cleans, improve and clean the effect, the second wiping roller will upwards throw away the chalk dust that wipes off from the blackboard writing surface immediately and get rid of in the powder concentration passageway to the chalk dust that wipes off the second wiping roller and the chalk dust that the first wiping roller threw off are thrown away along with the outer wall of second wiping roller simultaneously and are fallen to collection in the powder collection chamber.
Above-mentioned can see out, chalk writing on the blackboard writing face can be drawn into immediately after being wiped and get rid of among the powder concentration passageway blockade, then get rid of to gather in the powder chamber and concentrate, can prevent effectively that the chalk dust that is wiped down from leaking between first wiping roller and second wiping roller and blackboard writing face and with gathering the outer box of powder and waving out, has avoided waving of chalk dust when wiping the blackboard to a great extent, and is more sanitary, does benefit to teachers and students' health. And the writing surface of the blackboard can be wiped clean by pushing the blackboard upwards for wiping once, so that the blackboard is quicker.
Drawings
Fig. 1 is a schematic front view of a blackboard eraser according to an embodiment of the present invention;
fig. 2 is a left side view of a blackboard eraser (without a water pressing bag) according to an embodiment of the present invention;
fig. 3 is a schematic top view of a blackboard eraser (with the water pressing bag and the rope winding column removed) according to an embodiment of the present invention;
fig. 4 is a schematic front view of a blackboard eraser (cross-sectional view of a powder collecting box) according to an embodiment of the present invention;
FIG. 5 is a schematic left-view structural diagram of the first wiping roller, the second wiping roller, and the powder collecting box according to the embodiment of the present invention;
FIG. 6 is a schematic left side view of a gear set and gear rack arrangement provided in accordance with an embodiment of the present invention;
fig. 7 is a schematic top view of the matching structure of the dust pushing plate and the powder collecting chamber according to the embodiment of the invention.
In the figure:
1. a powder collecting outer box; 6. a blackboard; 2. a first wiping roller; 3. a second wiping roller; 4. a powder collecting cavity; 5. a powder throwing and concentrating channel; 11. a first powder scraping plate; 12. a second powder scraping plate; 7. a gear rack; 20. a driving gear; 30. a driven gear; 13. a limiting cover plate; 130. a limiting part; 40. pushing the ash plate; 400. pulling a rope; 41. an ash outlet; 21. a central shaft; 22. a wiping section; 221. a brush part; 222. a cloth wiping portion; 8. a water pressing bag; 81. a water delivery pipe; 82. a water spray nozzle; 71. a convex stop block; 410. discharging the ash cover; 14. a push-pull handle; 131. a rope winding column; 401. a bottom transverse plate; 402. a vertical push plate.
Detailed Description
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings and technical solutions required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 7, the blackboard eraser provided by the present embodiment includes a powder collecting outer box 1, a first wiping roller 2, a second wiping roller 3, the first wiping roller 2 and the second wiping roller 3 are both rotatably disposed inside the powder collecting outer box 1, the first wiping roller 2 is located above the second wiping roller 3, the powder collecting outer box 1 is close to one side opening of the blackboard, the first wiping roller 2 and the second wiping roller 3 are both rotatably disposed at the opening, the outer wall of the first wiping roller 2, the outer wall of the second wiping roller 3, a powder collecting cavity 4 is formed between the inner walls of the powder collecting outer box 1, the outer wall of the first wiping roller 2, the outer wall of the second wiping roller 3, a powder throwing concentration channel 5 is formed between the writing surfaces of the blackboard 6, and the powder throwing concentration channel 5 is communicated with the powder collecting cavity 4. When the blackboard eraser moves upwards along the height direction of the blackboard 6 to wipe the blackboard 6 (the direction of the gravity of the chalk dust is reversed, the chalk dust can be collected to a greater extent when falling due to the gravity in the wiping process, and the chalk dust is prevented from falling), the first wiping roller 2 and the second wiping roller 3 sequentially wipe the writing surface of the blackboard 6, the rotation directions of the first wiping roller 2 and the second wiping roller 3 are opposite, the first wiping roller 2 rotates downwards along the writing surface of the blackboard 6 to wipe the writing surface of the blackboard 6, the wiped chalk dust can be immediately rolled downwards along the outer wall of the first wiping roller 2 (the rolling direction is along the gravity direction of the chalk dust, so that the chalk dust is immediately rolled after being wiped), and the chalk dust is thrown into the chalk dust throwing concentration channel 5, meanwhile, the second wiping roller 3 is positioned below the first wiping roller 2, the rotation direction of the second wiping roller 3 is opposite to the rotation direction of the first wiping roller 2, and the writing surface of the blackboard 6 rotates upwards to wipe the writing surface of the blackboard 6, the blackboard 6 writing face after wiping first wiping roller 2 is wiped for the second time, improves and wipes the effect, and second wiping roller 3 will be from the blackboard 6 writing face wipe down the chalk dust immediately upwards get rid of the powder and concentrate in the passageway 5, and the chalk dust that second wiping roller 3 wiped off and the chalk dust that first wiping roller 2 got rid of simultaneously along with the outer wall of second wiping roller 3 get rid of and fall to collection powder chamber 4 and collect. Above-mentioned can see, the blackboard eraser that this embodiment provided, when wiping the blackboard, first wiping roller 2 and second wiping roller 3 are rotatory wiping in the middle of from the top to the bottom respectively, make the chalk writing on the blackboard writing face can be drawn into immediately after being wiped and get rid of blockade in the powder concentration passageway, then get rid of to concentrate in the collection powder chamber, can prevent effectively that the chalk dust that is wiped down from leaking and wafing out between first wiping roller 2 and second wiping roller 3 and the 6 writing faces of blackboard and between the outer box 1 of collection powder, the flying of chalk dust has been avoided when wiping the blackboard to a very big extent, and is more sanitary, does benefit to teachers and students' health.
In order to facilitate scraping off the chalk dust adhered to the outer surfaces of the first wiping roller 2 and the second wiping roller 3, further, a first chalk scraping plate 11 and a second chalk scraping plate 12 are arranged inside the chalk collecting box 1, the first chalk scraping plate 11 is used for scraping the chalk dust on the surface of the first wiping roller 2 into the chalk collecting cavity 4, the first chalk scraping plate 11 is located on one side of the first wiping roller 2, the first chalk scraping plate 11 can be fixed on the inner side wall or the inner top wall of the chalk collecting box 1, the second chalk scraping plate 12 is used for scraping the chalk dust on the surface of the second wiping roller 3 into the chalk collecting cavity 4, the second chalk scraping plate 12 is located on one side of the second wiping roller 3, and the second chalk scraping plate 12 can be fixed on the inner side wall or the inner top wall of the chalk collecting box 1. When the first wiping roller 2 and the second wiping roller 3 rotate to wipe the blackboard 6, the first wiping roller 2 scrapes the first chalk dust scraping plate 11 in the chalk dust collecting cavity 4, so that the chalk dust adhered to the surface of the first wiping roller 2 can be scraped and fall into the chalk dust collecting cavity 4 to be concentrated, the second wiping roller 3 scrapes the chalk dust adhered to the surface of the second wiping roller 3 in the chalk dust collecting cavity 4, and the chalk dust adhered to the surface of the second wiping roller 3 is scraped, so that the chalk dust on the surface of the first wiping roller 2 and the second wiping roller 3 cannot be adhered to the blackboard again when the blackboard 6 is wiped next time, and the wiping effect on the blackboard is ensured.
In order to facilitate the driving of the first wiping roller 2 and the second wiping roller 3, further, a gear rack 7 is respectively arranged on two sides of the blackboard 6 along the height direction of the blackboard 6, the first wiping roller 2 and the second wiping roller 3 are driven by a gear set, and the gear set is meshed with the gear rack 7.
Specifically, the gear train includes driving gear 20 that sets up on first wiping roller 2, set up driven gear 30 on second wiping roller 3, the both sides of first wiping roller 2 are provided with a driving gear 20 respectively, the both sides of second wiping roller 3 are provided with a driven gear 30 respectively, driving gear 20 of first wiping roller 2 both sides meshes with driven gear 30 of second wiping roller 3 both sides respectively, when the blackboard eraser moves up along the direction of height of blackboard 6 and wipes blackboard 6, driving gear 20 and the meshing transmission of gear rack 7, driven gear 30 and gear rack 7 are non-contact state. When the direction of height along the blackboard promotes collection powder outer box 1 up, driving gear 20 rotates on gear strip 7 promptly, thereby it follows the writing face downward rotation of blackboard to drive first wiping roller 2, driving gear 20 drives driven gear 30 rotatory simultaneously, driven gear 30 drives second wiping roller 3 and upwards rotates along the writing face of blackboard, thereby the realization is cleaned the lock-out formula of the chalk writing of blackboard writing face, make by the chalk dust of wiping off all thrown to get rid of the powder and concentrate in the passageway 5, then throw into and concentrate in the collection powder chamber. The outer side wall of the powder collecting outer box 1 is provided with a push-pull handle 14, which is convenient for manually holding the push-pull powder collecting outer box 1.
Of course, a motor may be disposed on the powder collecting outer box 1, and the driving gear 20 is driven to rotate by the motor. Through manual mechanical drive in this embodiment, structural stability is high, and is with low costs, easy to maintain, and power devices such as motors use fragile under the dust environment.
In order to prevent the blackboard eraser from influencing writing on the blackboard when the blackboard eraser is not required to be erased, the lower ends of the gear bars 7 extend to the lower part of the blackboard 6, and the powder collecting outer box 1 can be pulled to the lower part of the blackboard 6 when the blackboard eraser is not required to be erased. The lower end of the gear rack 7 is provided with a convex stop block 71 which can support the powder collecting outer box 1, so that the blackboard eraser can be supported conveniently when being positioned below a blackboard.
In order to facilitate the connection and matching between the powder collecting outer box 1 and the gear rack 7 when the powder collecting outer box 1 is pushed, furthermore, two ends of the powder collecting outer box 1 are respectively provided with a limit cover plate 13 (which can be fixedly connected through screws and is easy to disassemble and assemble), one end of the limit cover plate 13 far away from the powder collecting outer box 1 is provided with a limit part 130, the limit part 130 is a convex strip perpendicular to the limit cover plate 13, the limit part 130 extends to the non-tooth back surface of the gear rack 7, so that the powder collecting outer box 1 is matched with the gear rack 7 all the time when moving up and down, the powder collecting outer box 1 is prevented from being separated from the gear rack 7, the limit part 130 is in clearance fit with the non-tooth back surface, when the powder collecting outer box 1 is pushed and pressed towards the writing surface of the blackboard, the first wiping roller 2 and the second wiping roller 3 are in contact with the writing surface of the blackboard, so as to be convenient to push the blackboard upwards to wipe the blackboard, when the powder collecting outer box 1 is pulled back, the first wiping roller 2 and the second wiping roller 3 are separated from the writing surface of the blackboard, the chalk dust collecting outer box 1 is convenient to pull downwards to reset to the lower part of the blackboard, and the first wiping roller 2 and the second wiping roller 3 do not re-stick the chalk dust adhered to the surfaces of the chalk dust collecting outer box on the writing surface of the blackboard. The drive gear 20 is always in mesh with the gear rack 7.
Furthermore, two ends of the first wiping roller 2 are respectively connected with the limiting cover plates 13 at two ends of the powder collecting outer box 1 through bearings, and two ends of the second wiping roller 3 are respectively connected with the limiting cover plates 13 at two ends of the powder collecting outer box 1 through bearings.
In order to facilitate the centralized processing of the chalk dust collected in the chalk collecting cavity 4, the blackboard eraser further comprises a chalk pushing plate 40 arranged in the chalk collecting cavity 4, wherein the chalk pushing plate 40 is used for pushing the chalk dust deposited in the chalk collecting cavity 4 out of the chalk collecting cavity 4, so that the centralized processing of the deposited chalk dust is facilitated.
Specifically, two pull cords 400 are respectively connected to two sides of the dust pushing plate 40, one end of each of the two pull cords 400, which is far away from the dust pushing plate 40, extends to the outside of the dust collecting chamber 4, when one of the pull cords 400 is continuously pulled, the dust pushing plate 40 moves along the length direction of the dust collecting chamber 4 to push out the chalk dust deposited in the dust collecting chamber 4 from the dust outlet 41 of the dust collecting chamber 4, and when the other pull cord 400 is continuously pulled, the dust pushing plate 40 is pulled back to the original position in the dust collecting chamber 4. The lower extreme of second powder scraping plate 12 is fixed in on the diapire of outer box 1 of powder collection, and second powder scraping plate 12 slope sets up, makes the lower part in powder collection chamber 4 be big-end-up's trapezoidal upside down, pushes away the shape of hawk 40 and this shape looks adaptation of the lower part in powder collection chamber 4, and the hawk 40 of being convenient for moves along powder collection chamber 4 length direction steadily.
Further, the dust outlet 41 is arranged in the middle of the powder collecting outer box 1, the dust outlet cover 410 is detachably arranged on the dust outlet 41, two ends of the powder collecting cavity 4 are respectively provided with a dust pushing plate 40, the end portions of two dust pushing plates 40 close to a pull rope 400 of the dust outlet 41 all extend to the outside of the dust outlet 41, the end portions of two pull ropes 400 of the two dust pushing plates 40 far away from the dust outlet 41 all penetrate through the limiting cover plate 13 and extend to the outside, the outside of the limiting cover plate 13 at the two ends of the powder collecting outer box 1 is respectively provided with a winding rope column 131, when the two dust pushing plates 40 are respectively arranged at the two ends of the powder collecting cavity 4, one pull rope 400 of the two dust pushing plates 40 far away from the dust outlet 41 is respectively wound on the winding rope column 131. When the deposited chalk dust needs to be cleaned, the dust outlet cover 410 is opened, the two dust pushing plates 40 are detached from the rope winding column 131 through the pull ropes 400 far away from the dust outlet 41, the two dust pushing plates 40 are moved towards the direction close to the dust outlet 41 through pulling the two pull ropes 400 at the dust outlet 41, so that the chalk dust on the left side and the right side of the chalk collecting cavity 4 is pushed to the dust outlet 41 to be discharged, a container can be arranged below the chalk collecting cavity to collect the chalk dust in the chalk collecting cavity 4 more quickly, and the situation that the pushed chalk dust is too much and overflows to the surface of the second wiping roller 3 due to the fact that only one dust pushing plate 40 is arranged can be prevented.
In order to improve the stability of the dust pushing plate 40 during movement, further, the dust pushing plate 40 comprises a bottom transverse plate 401 and a vertical pushing plate 402 arranged on the bottom transverse plate 401, and the structure is stable and high, so that chalk dust can be pushed more stably without tilting when the dust pushing plate 40 moves.
In order to improve the wiping effect of stubborn stains on a blackboard, the first wiping roller 2 further includes a central shaft 21 and a wiping portion 22 provided outside the central shaft 21, and the wiping portion 22 includes a brush portion 221 and a cloth wiping portion 222. In the long-term use of the blackboard 6, the writing surface thereof is often easily adhered with dirt formed by the combination of dust and water drops and dried, and the writing surface of the blackboard has various tiny grooves due to large writing force, and the dirt and the chalk dust in the grooves can be removed by the bristles of the brush part 221. The cloth wiping portion 222 may be made of the same material as the wiping cloth of a common blackboard eraser. The brush part 221 slightly protrudes from the surface of the cloth wiping part 222 along the circumferential direction of the outer surface of the first wiping roller 2, so that the brush of the brush part can be pressed against the writing surface of the blackboard 6, and the effect of removing dirt can be enhanced. The second wiping roller 3 comprises a central rotating shaft and wiping jackets arranged outside the central rotating shaft, the wiping jackets can be made of the same material as wiping cloth of a common blackboard eraser, and the driven gears 30 are arranged at two ends of the central rotating shaft.
Further, the blackboard eraser further comprises a water pressing bag 8 arranged on the central shaft 21, a water delivery pipe 81 communicated with a water outlet of the water pressing bag 8, and a plurality of water spray nozzles 82 communicated with the inside of the water delivery pipe 81, wherein the inside of the central shaft 21 is hollow, the water pressing bag 8 is fixedly arranged at the end part of the central shaft 21, the water delivery pipe 81 and the plurality of water spray nozzles 82 are fixedly arranged inside the central shaft 21, and the water spray ends of the plurality of water spray nozzles 82 respectively penetrate through the outer wall of the central shaft 21 and extend into the hairbrush part 221. The water pressing bag 8 is a soft air bag made of rubber, a water filling opening is formed in the water pressing bag 8, a water filling plug is arranged on the water filling opening and can be in threaded connection with the water filling opening, water can be added into the water pressing bag 8 by opening the water filling plug, the water pressing bag 8 is pressed, water in the water pressing bag 8 can be extruded to the water spray nozzle 82 through the water conveying pipe 81, the water spray nozzle 82 sprays out of the brush part 221, the writing surface of the blackboard can be cleaned, stains on the writing surface of the blackboard are wetted, and therefore the cleaning is easy. Meanwhile, when the powder collecting outer box 1 is pushed, the water pressing bag 8 is pressed, and when the brush part 221 is in scraping contact with the first powder scraping plate 11, water drops can be scraped and popped out, so that the dust falling effect is achieved, and the chalk dust in the powder collecting cavity 4 can fall to the bottom of the powder collecting cavity 4 more quickly.
The use method of the blackboard eraser provided by the embodiment comprises the following steps:
s101: pulling the push-pull handle 14 to pull the powder collecting outer box 1 from the lower part of the blackboard 6 to the outer side of the writing surface at the bottom of the blackboard;
s102: pushing the powder collecting outer box 1 towards the direction close to the writing surface of the blackboard 6 to enable the first wiping roller 2 and the second wiping roller 3 to be in contact with the writing surface of the blackboard 6 and push the powder collecting outer box 1 upwards along the height direction of the blackboard 6;
s103: the driving gear 20 is meshed with and rotates on the gear bar 7, so that the first wiping roller 2 rotates downwards along the writing surface of the blackboard 6 to wipe the writing surface of the blackboard 6, and throws the wiped chalk dust into the powder throwing concentration channel 5, the second wiping roller 3 rotates upwards along the writing surface of the blackboard 6 to wipe the writing surface of the blackboard 6 wiped by the first wiping roller 2, and throws the wiped chalk dust into the powder throwing concentration channel 5, and meanwhile, the second wiping roller 3 throws the wiped chalk dust and the chalk dust thrown by the first wiping roller 2 into the powder throwing concentration channel 5 into the powder collecting cavity 4;
s104: the first powder scraping plate 11 scrapes the chalk dust adhered to the surface of the first wiping roller 2 into the powder collecting cavity 4, and the second powder scraping plate 12 scrapes the chalk dust adhered to the surface of the second wiping roller 3 into the powder collecting cavity 4;
s105: the water pressing bag 8 is squeezed, so that water in the water pressing bag 8 is conveyed to the water spray nozzle 82 through the water conveying pipe 81, the water spray nozzle 82 sprays water mist to the hairbrush part 221 of the first wiping roller 2, and the hairbrush part 221 brushes dirt on the writing surface of the blackboard 6;
s106: after the powder collecting outer box 1 is pushed to the top of the blackboard 6, the powder collecting outer box 1 is pulled backwards, the first wiping roller 2 and the second wiping roller 3 are both separated from the writing surface of the blackboard 6, the powder collecting outer box 1 is pushed downwards, the powder collecting outer box 1 is moved to the original position below the blackboard 6 and is erected on the convex stop block 71, and the blackboard is wiped completely;
s107: when the chalk dust deposited in the chalk dust collecting cavity 4 needs to be removed after being used for a period of time, the pull rope 400 at one end of the chalk dust pushing plate 40 is pulled, so that the chalk dust pushing plate 40 moves along the length direction of the chalk dust collecting cavity 4 to push the deposited chalk dust together and push the chalk dust out through the chalk dust outlet 41 of the chalk dust collecting cavity 4; pulling the pull rope 400 at the other end of the dust pushing plate 40 moves the dust pushing plate 40 reversely to the original position.
It can be seen from the above-mentioned embodiment that this blackboard eraser that implements provides, through the drive of pure mechanical type, need not to introduce power consumptive equipment such as motor, and is more reliable and more stable, realized that the chalk dust that will be wiped down on the blackboard writing face can be blocked in getting rid of the powder and concentrating in the passageway and sending into the collection powder chamber and concentrate immediately, and the chalk dust is avoided leaking and is wafted to very big degree, and is more sanitary, more is good for teachers and students 'health, has greatly improved the problem that current blackboard eraser device can't avoid wiping in-process chalk dust and spill and waft.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (1)
1. The use method of the blackboard eraser is characterized in that:
the blackboard eraser comprises a powder collecting outer box (1), a first wiping roller (2) and a second wiping roller (3), which are arranged along the length direction of a blackboard (6);
the first wiping roller (2) and the second wiping roller (3) are both rotatably arranged inside the powder collecting outer box (1), and the first wiping roller (2) is positioned above the second wiping roller (3);
a powder collecting cavity (4) is formed among the outer wall of the first wiping roller (2), the outer wall of the second wiping roller (3) and the inner wall of the powder collecting outer box (1), a powder throwing and concentrating channel (5) is formed among the outer wall of the first wiping roller (2), the outer wall of the second wiping roller (3) and the writing surface of the blackboard (6), and the powder throwing and concentrating channel (5) is communicated with the powder collecting cavity (4);
when the blackboard eraser moves upwards along the height direction of the blackboard (6) to wipe the blackboard (6), the first wiping roller (2) and the second wiping roller (3) sequentially wipe the writing surface of the blackboard (6), the first wiping roller (2) and the second wiping roller (3) are opposite in rotation direction, chalk dust wiped from the writing surface of the blackboard (6) is thrown and dropped into the powder throwing concentration channel (5) by the first wiping roller (2), and the chalk dust is thrown and dropped into the powder collecting cavity (4) by the second wiping roller (3);
two sides of the blackboard (6) are respectively provided with a gear bar (7) along the height direction of the blackboard (6);
the first wiping roller (2) and the second wiping roller (3) are in transmission through a gear set;
the gear set is in meshing transmission with the gear rack (7);
two ends of the powder collecting outer box (1) are respectively provided with a limiting cover plate (13);
one end of the limiting cover plate (13) far away from the powder collecting outer box (1) is provided with a limiting part (130);
the limiting part (130) extends to the non-tooth back surface of the gear rack (7);
the limiting part (130) is in clearance fit with the non-tooth back surface;
the gear set comprises a driving gear (20) arranged on the first wiping roller (2) and a driven gear (30) arranged on the second wiping roller (3);
the driving gear (20) is meshed with the driven gear (30);
when the blackboard eraser moves upwards along the height direction of the blackboard (6) to wipe the blackboard (6), the driving gear (20) is in meshing transmission with the gear bar (7);
a first powder scraping plate (11) and a second powder scraping plate (12) are arranged inside the powder collecting outer box (1);
the first powder scraping plate (11) is used for scraping the chalk dust on the surface of the first wiping roller (2) into the powder collecting cavity (4);
the second powder scraping plate (12) is used for scraping the chalk dust on the surface of the second wiping roller (3) into the powder collecting cavity (4);
the first wiping roller (2) comprises a central shaft (21) and a wiping part (22) arranged outside the central shaft (21);
the wiping portion (22) includes a brush portion (221) and a cloth wiping portion (222);
the blackboard eraser further comprises a water pressing bag (8) arranged on the central shaft (21), a water delivery pipe (81) communicated with a water outlet of the water pressing bag (8), and a plurality of water spray nozzles (82) communicated with the interior of the water delivery pipe (81);
the central shaft (21) is hollow inside;
the water conveying pipe (81) and the plurality of water nozzles (82) are arranged inside the central shaft (21);
the water spraying ends of the water spraying nozzles (82) respectively penetrate through the outer wall of the central shaft (21) and extend into the brush part (221);
the blackboard eraser also comprises a dust pushing plate (40) arranged in the powder collecting cavity (4);
the dust pushing plate (40) is used for pushing the chalk dust deposited in the dust collecting cavity (4) out of the dust collecting cavity (4);
two sides of the ash pushing plate (40) are respectively connected with a pull rope (400);
one ends of the two pull ropes (400) far away from the ash pushing plate (40) extend to the outside of the powder collecting cavity (4);
the using method comprises the following steps:
s101: pulling the powder collecting outer box (1) to the outer side of the writing surface at the bottom of the blackboard from the lower part of the blackboard (6);
s102: pushing the powder collecting outer box (1) towards the direction close to the writing surface of the blackboard (6) to enable the first wiping roller (2) and the second wiping roller (3) to be in contact with the writing surface of the blackboard (6), and pushing the powder collecting outer box (1) upwards along the height direction of the blackboard (6);
s103: the driving gear (20) is meshed with the gear bar (7) to rotate, so that the first wiping roller (2) rotates downwards along the writing surface of the blackboard (6) to wipe the writing surface of the blackboard (6) and throw the wiped chalk dust into the powder throwing concentration channel (5), the second wiping roller (3) rotates upwards along the writing surface of the blackboard (6) to wipe the writing surface of the blackboard (6) wiped by the first wiping roller (2) and throw the wiped chalk dust into the powder throwing concentration channel (5), and meanwhile, the second wiping roller (3) throws the wiped chalk dust and the first wiping roller (2) into the powder throwing concentration channel (5) and throws the chalk dust into the powder collecting cavity (4);
s104: the first powder scraping plate (11) scrapes the chalk dust adhered to the surface of the first wiping roller (2) into the powder collecting cavity (4), and the second powder scraping plate (12) scrapes the chalk dust adhered to the surface of the second wiping roller (3) into the powder collecting cavity (4);
s105: extruding a water pressing bag (8), conveying water in the water pressing bag (8) to a water spraying nozzle (82) through a water conveying pipe (81), spraying water mist to a brush part (221) of the first wiping roller (2) by the water spraying nozzle (82), and brushing dirt on the writing surface of the blackboard (6) by the brush part (221);
s106: after the powder collecting outer box (1) is pushed to the top of the blackboard (6), the powder collecting outer box (1) is pulled backwards, the first wiping roller (2) and the second wiping roller (3) are both separated from the writing surface of the blackboard (6), the powder collecting outer box (1) is pushed downwards, the powder collecting outer box (1) is moved to the original position below the blackboard (6), and the blackboard is wiped completely;
s107: when the chalk dust deposited in the chalk dust collecting cavity (4) needs to be removed, a pull rope (400) at one end of the chalk dust pushing plate (40) is pulled, so that the chalk dust pushing plate (40) moves along the length direction of the chalk dust collecting cavity (4) to push the deposited chalk dust together and push the chalk dust out through a dust outlet (41) of the chalk dust collecting cavity (4); and pulling the pull rope (400) at the other end of the ash pushing plate (40) to reversely move the ash pushing plate (40) to the original position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910851161.4A CN110525094B (en) | 2019-09-10 | 2019-09-10 | Blackboard eraser and using method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910851161.4A CN110525094B (en) | 2019-09-10 | 2019-09-10 | Blackboard eraser and using method thereof |
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| CN110525094A CN110525094A (en) | 2019-12-03 |
| CN110525094B true CN110525094B (en) | 2021-11-09 |
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| CN201910851161.4A Active CN110525094B (en) | 2019-09-10 | 2019-09-10 | Blackboard eraser and using method thereof |
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| JPH10315690A (en) * | 1997-03-17 | 1998-12-02 | Masami Honma | Eraser |
| JP2000238495A (en) * | 1999-02-23 | 2000-09-05 | Masao Tanaka | Eraser |
| CN2429338Y (en) * | 2000-04-20 | 2001-05-09 | 王键 | Dust-collecting blackboard eraser |
| KR100375174B1 (en) * | 2000-07-24 | 2003-03-08 | 주식회사 동양흑판 | Auto-Clean Blackboard Erasing Apparatus |
| CN2465952Y (en) * | 2001-02-27 | 2001-12-19 | 高树国 | Electric chalk dust-less blackboard |
| CN2680475Y (en) * | 2003-11-17 | 2005-02-23 | 郑惠亮 | Blackboard eraser |
| CN2883026Y (en) * | 2005-09-07 | 2007-03-28 | 赵金君 | Handheld drying electric eraser |
| KR20070119127A (en) * | 2006-06-14 | 2007-12-20 | 남재웅 | Electromotion board eraser |
| JP2008254411A (en) * | 2007-04-05 | 2008-10-23 | Masao Tanaka | Eraser |
| CN201471916U (en) * | 2009-08-26 | 2010-05-19 | 陈怡莹 | Double-roll blackboard eraser |
| CN102001252A (en) * | 2010-09-21 | 2011-04-06 | 唐一夫 | Roller-type dust collection blackboard brush and working method thereof |
| CN102476544A (en) * | 2010-11-30 | 2012-05-30 | 陈非 | Lengthened sliding type blackboard eraser |
| CN103253045A (en) * | 2013-06-06 | 2013-08-21 | 翟汝宁 | Blackboard |
| CN205149328U (en) * | 2015-11-19 | 2016-04-13 | 黄子霄 | Blackboard dust groove intelligent vehicle cleaning device |
| CN206264662U (en) * | 2016-05-27 | 2017-06-20 | 南京农业大学 | Automatic dust-absorption eraser |
| RU2629746C1 (en) * | 2016-07-27 | 2017-08-31 | Татьяна Сергеевна Астахова | Device for removing chalk from class board |
| CN207190617U (en) * | 2016-10-09 | 2018-04-06 | 姚文俊 | A kind of blackboard-cleaning dust treatment plant |
| CN207697334U (en) * | 2017-09-19 | 2018-08-07 | 李孟骁 | A kind of board |
| CN107718958A (en) * | 2017-09-30 | 2018-02-23 | 周泳臣 | A kind of electrostatic environment-protecting blackboard eraser |
| CN107738528A (en) * | 2017-10-19 | 2018-02-27 | 绍兴柯桥韩玉电子科技有限公司 | A kind of blackboard for teaching for being easy to deashing |
| CN110154596B (en) * | 2018-01-08 | 2021-07-06 | 青岛黄海学院 | Automatic blackboard erasing device and blackboard comprising same |
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2019
- 2019-09-10 CN CN201910851161.4A patent/CN110525094B/en active Active
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| CN110525094A (en) | 2019-12-03 |
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