CN113602028B - Drawing board for mathematical education - Google Patents
Drawing board for mathematical education Download PDFInfo
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- CN113602028B CN113602028B CN202111082827.8A CN202111082827A CN113602028B CN 113602028 B CN113602028 B CN 113602028B CN 202111082827 A CN202111082827 A CN 202111082827A CN 113602028 B CN113602028 B CN 113602028B
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- groove
- blackboard
- drawing blackboard
- block
- ash
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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
- B43L1/00—Repeatedly-usable boards or tablets for writing or drawing
- B43L1/04—Blackboards
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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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- 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
Abstract
The invention belongs to the technical field of teaching instruments, and particularly relates to a drawing board for mathematical teaching, which comprises a fixed frame body, a first drawing blackboard, a second drawing blackboard, a mounting plate and a dust removing block, wherein the bottom of the fixed frame body is provided with a fixed frame, and the middle part of the fixed frame body is provided with the first drawing blackboard; according to the invention, the ash removal block, the ash removal strip and the ash removal cloth are arranged, so that the graphic content drawn on the surface of the second drawing blackboard is repeatedly scraped for many times, and the graphic content on the surface of the second drawing blackboard is fully removed; and the ash removing cloth is made of chemical fiber materials and is easy to generate static electricity, so the chalk dust is fully attached to the surface of the ash removing cloth under the action of the static electricity, the chalk dust floating into the air is reduced, and discomfort of teachers and students is avoided.
Description
Technical Field
The invention belongs to the technical field of teaching instruments, and particularly relates to a drawing board for mathematical teaching.
Background
At present, mathematics is a subject of researching the concepts of quantity, structure, change, space, information and the like, and belongs to a form science from a certain point of view. The teaching aid is divided into advanced mathematics and elementary mathematics, also refers to complex sets, algebras and geometries of high school and middle school as intermediate mathematics, plays an irreplaceable role in human historical development and social life, is also an essential basic tool for learning and researching modern science and technology, and teachers often draw on blackboards to give lessons to students and solve problems in the teaching process of mathematics. The drawing board is the instrument that is used for drawing in the aspect of the creation, mainly is applicable to the teaching field etc. including drawing in the aspect of fine arts, spelling of english word, drawing in the aspect of mathematics etc. wherein the in-process that the teacher in the aspect of drawing of mathematical education need draw on the drawing board and analyze and explain classmates.
Also appeared the technical scheme that a patent was about college mathematics teaching drawing board among the prior art, chinese patent as application number CN2018219954570 discloses college mathematics teaching drawing board, which comprises a frame, the inside of frame is equipped with the blank, one side of frame is equipped with the fixed block, one side of frame is equipped with the arm-tie, the bottom of frame is equipped with the connecting plate, and the positive one side of connecting plate is equipped with stop gear, stop gear's top is equipped with the ash storage board, and one side of stop gear bottom is equipped with the telescopic link, the bottom of telescopic link is equipped with the cavity pole, the bottom at the cavity pole back is equipped with the threaded rod. The drawing board for college mathematics teaching is convenient for better increasing the drawing area of the drawing board through the mutual matching between the fixed block and the drawing board, so that teachers cannot prematurely wipe off the part explained in the front in the teaching process, the problem that the teacher can prematurely wipe off the front due to the area of the drawing board in the teaching process is solved, the learning progress of some students is further poor, and the learning efficiency of the students is improved; however, the above utility model still has the defect that the drawing content recorded by the chalk on the pulling plate is more compact to adhere to the surface of the pulling plate, so that the drawing content can be thoroughly removed by using the blackboard eraser to perform multiple times of wiping, and the above utility model only needs to perform one-time cleaning by using the brush on the fixed block, which easily causes more drawing content remained on the pulling plate and influences the next use; the cleaned chalk dust is light in weight, and is easy to separate from the pulling plate and be brought into the air under the action of the brush, and the chalk dust is easy to float in the air and attach to the bodies of teachers and students, even enter respiratory tracts of the teachers and students, so that discomfort is caused; so that the technical solution is limited.
In view of the above, the present invention provides a drawing board for mathematical education to solve the above technical problems.
Disclosure of Invention
In order to make up the defects of the prior art, the drawing board solves the problems that the prior drawing board for mathematical education is difficult to fully remove the graphic contents on the drawing board when in work, and chalk dust generated in the cleaning process is easy to float into the air, thereby causing adverse effects on teachers and students; the invention provides a drawing board for mathematical education.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a drawing board for mathematical education, which comprises a fixed frame body, a first drawing blackboard, a second drawing blackboard, a mounting plate and a dust removing block, wherein the bottom of the fixed frame body is provided with a fixed frame, and the middle part of the fixed frame body is provided with the first drawing blackboard; the first drawing blackboard is characterized in that a first groove is symmetrically formed in the side wall part of the first drawing blackboard, a mounting plate is embedded in the first groove, the mounting plate is connected with the inner surface of the first groove in a sliding mode, a handle is arranged at the part, far away from the first groove, of the side wall of the mounting plate, and a limiting block is arranged at the part, close to the first groove, of the side wall of the mounting plate; the utility model discloses a drawing blackboard, including the installation board, no. two drawing blackboards are installed to the surface that is close to a drawing blackboard on the installation board, just be equipped with No. two grooves to the position on No. two drawing blackboards surfaces on the inslot surface, no. two inslots have the piece that removes ash, the piece that removes ash links to each other through spring and No. two inslots surfaces, and removes ash the piece and just is equipped with No. three grooves to the position on No. two drawing blackboards surfaces, no. three inslots evenly install a set of strip that removes ash, it is equipped with ash removal cloth on the tip of No. two drawing blackboards to remove ash the strip, ash removal cloth is the chemical fiber material.
When the teaching blackboard is in work, the fixed frame body is placed in a classroom through the fixed frame, and when a mathematic teacher teaches mathematic knowledge and needs to draw related figures, the mathematic teacher can utilize the first drawing blackboard in the middle of the fixed frame body and draw the figures needing to be drawn on the surface of the first drawing blackboard through chalk, so that students below can understand and record the figures conveniently; when the surface of the first drawing blackboard is not enough to use and the graphic content drawn on the surface of the first drawing blackboard needs to be reserved, a teacher can draw out the mounting plate through the handle and draw the graphic on the surface of the second drawing blackboard, so that the teacher can draw more graphics while keeping the original content, and the teaching effect is improved; when the mounting plate is about to be separated from the first groove, the limiting block is contacted with the part, close to the outlet, of the inner surface of the first groove, so that the mounting plate is limited and is prevented from being completely pulled out; when the course is finished, a teacher pushes the mounting plate to be taken in the first groove through the handle, in the moving process of the mounting plate, the graphic content drawn on the surface of the second drawing blackboard on the mounting plate is scraped by the ash removing cloth at the end part of the ash removing strip on the ash removing block, and the evenly distributed ash removing strips enable the graphic content drawn on the surface of the second drawing blackboard to be repeatedly scraped for multiple times, so that the graphic content on the surface of the second drawing blackboard is fully removed, the workload of the teacher for cleaning the drawing graphics drawn by the teacher is reduced, and the teacher can draw the second drawing blackboard directly when the mounting plate is taken out next time; when the dust removing cloth arranged at the end part of the dust removing strip is used for removing graphic contents drawn by chalks on a second drawing blackboard, the chalk dust forming the graphic contents is left on the dust removing cloth under the friction action because the surface of the dust removing cloth is rough; the dusting cloth continuously vibrates in the scraping effect with No. two drawing blackboard surfaces, the inside fibre of dusting cloth produces static by oneself looks friction under the vibration effect, and because dusting cloth is the chemical fibre material, static is difficult for losing easy accumulation, therefore the chalk dust fully adheres to on dusting cloth surface under the electrostatic action, the chalk dust that wafts into in the air has been reduced, the chalk dust of avoiding getting into in the air is too much, lead to the chalk dust to fall on one's body mr and student in a large number, cause mr and student's discomfort.
Preferably, the position that a drawing blackboard surface is close to the lateral wall is equipped with a set of screw hole, the screw hole communicates with each other and is concentrated in the position that is close to fixed framework on a drawing blackboard with No. two inslot portions, every all install a fixing bolt on the screw hole, a fixing bolt tip passes the screw hole and contacts with the ash removal piece surface, a fixing bolt is kept away from and is equipped with the rotor plate on the tip in No. two grooves, a fixing bolt is equipped with an elastic rubber piece with the tip that removes ash removal piece surface contact.
When the installation plate is pulled out, a part of the second drawing blackboard is kept in a position, which is just opposite to the second groove, in the first groove, and then a teacher rotates the first fixing bolt by twisting the first rotating plate; when the graphic content needs to be cleaned, the first fixing bolt is rotated to reduce the pressure between the second drawing blackboard and the ash removal block, the second drawing blackboard is ensured to be in close contact with the ash removal block, and then the second drawing blackboard is pushed, so that the ash removal block can clean the graphic content on the surface of the second drawing blackboard; the abrasion to the surface of the ash removing block caused by the rotation of the end part of the first fixing bolt is reduced through the buffer action of the first elastic rubber block, so that the ash removing block can work normally; if the teacher does not completely explain the contents of the teaching materials because of time problems, the drawing contents need to be reserved so as to facilitate the continuous explanation in the next course; but there is other mr's course between twice course, in order to avoid causing the influence to other mr's course, mathematics mr can be in advance with the graphic content record that can't explain totally on No. two drawing blackboards, and wipe off the complete content of having explained on a drawing blackboard, be convenient for other mr's use, subsequently through rotating fixing bolt, make a fixing bolt tip remove to the direction of keeping away from the ash removal piece, the ash removal piece no longer receives the extrusion and resets under the effect of continuous spring this moment, the ash removal strip drives the ash removal cloth and leaves No. two drawing blackboard surfaces along with the ash removal piece, draw No. two drawing blackboards through the handle this moment inside the groove, no. two drawing blackboards surface's content can not receive the influence of ash removal cloth and can obtain complete the reservation, and the drawing content on No. two drawing blackboards of a groove also obtains hiding, can not influence other mr's lecture experience.
Preferably, the dust removing cloth is arranged in multiple layers, and lugs are uniformly arranged on the opposite surfaces of the adjacent dust removing cloth.
When the chalk dust removing device works, in the scraping process, due to the fact that the ash removing cloth layers on the surface of the ash removing roller are arranged, the ash removing cloth layers on the adjacent layers are in relative contact and slide, and the static electricity on the ash removing cloth is increased by the sliding friction between the adjacent ash removing cloth layers, so that the ash removing cloth further adsorbs the falling chalk dust in the scraping process, and the chalk dust entering the air is further reduced; the bumps uniformly arranged on the opposite surfaces of the adjacent dust removing cloths keep gaps between the dust removing cloths, so that the adjacent dust removing cloths are prevented from being adhered together under the action of static electricity, and the relative sliding between the adjacent dust removing cloths is ensured; and the chalk dust that ash removing cloth was clear away can get into the clearance between the adjacent ash removing cloth to receive the limiting displacement of adjacent ash removing cloth and lug, make the chalk dust receive spacing and can't waft everywhere, reduced the harmful effects of the chalk dust of wafing to teachers and students.
Preferably, the dust removing strip is made of elastic materials, a limiting rubber sheet is evenly arranged on the side wall of the dust removing strip, and the end part of the limiting rubber sheet inclines towards the direction away from the first drawing blackboard.
When the dust removing strip works, the dust removing strip is made of elastic materials, when a teacher pushes the mounting plate to be taken in the first groove, the dust removing strip is scraped with the surface of the second drawing blackboard, when the friction action of the dust removing strip is large, the dust removing strip is pressed, bent and deformed, the end part of the dust removing cloth on the dust removing strip collides with the end part of the limiting rubber sheet on the side surface of the adjacent dust removing strip, so that dust accumulated on the end part of the dust removing cloth is cleaned, the situation that the end part of the dust removing cloth, which is contacted with the surface of the second drawing blackboard, cannot normally work due to excessive accumulated dust is avoided, and when the friction action of the dust removing strip is reduced, the dust removing strip is deformed and recovered; and the chalk dust that ash removing cloth cleared up has partly to drift to spacing rubber piece and the clearance position between the ash removing strip lateral wall to receive the limiting displacement of spacing rubber piece, avoid being located the chalk dust that the clearance position between spacing rubber piece and the ash removing strip lateral wall drifts to the external world or adheres to No. two drawing blackboard surfaces again, reduce the harmful effects to teachers and students.
Preferably, the second groove penetrates through the bottom of the first drawing blackboard and the bottom of the fixed frame body in sequence and is communicated with the outside; the bottom of the ash removal block extends out of the bottom of the second groove and is provided with a pull ring, a fixing elastic sheet is arranged at a position, close to the bottom, of the side wall of the ash removal block, and the fixing elastic sheet is in close contact with the side face of the bottom of the second groove; and one end of a spring in the second groove is fixed with the inner surface of the second groove, and the other end of the spring is in surface contact with the ash removal block.
When the dust removing block works normally, the fixed elastic sheet at the bottom of the dust removing block is in close contact with the inner surface of the second groove, so that the dust removing block is fixed under the friction action between the fixed elastic sheet and the inner surface of the second groove; when the dust removing block works for a period of time, and the cleaning effect of the dust removing block on the graphic content on the surface of the second drawing blackboard is not ideal, the dust removing block is pulled out from the lower part of the fixed frame body through the pull ring, and the dust removing strips and the dust removing cloth on the dust removing block are cleaned, and the dust removing block is pulled out from the lower part of the fixed frame body, so that chalk dust brought out in the process of pulling out the dust removing block is concentrated at the part, close to the ground, of the lower part of the fixed frame body, and the chalk dust is prevented from flying to a high position and is difficult to settle on the ground; after the cleaning is finished, the ash removal block is inserted into the second groove again, so that the ash removal block can normally play a role.
Preferably, the second drawing blackboard is embedded into a fourth groove formed in the surface of the mounting plate, and the second drawing blackboard is connected with the fourth groove in a sliding manner; the part of the second drawing blackboard, which is close to the inner surface of the fourth groove, is contacted with the inner surface of the fourth groove through uniformly arranged springs; mounting holes are uniformly formed in the back surface of the mounting plate close to the middle, and threads are arranged on the inner surface of each mounting hole; the mounting holes are all provided with a second fixing bolt, and threads on the second fixing bolt are meshed with threads on the inner surface of the mounting hole; no. two fixing bolt keep away from the tip of mounting hole and be equipped with the rotor plate No. two, and No. two fixing bolt stretch into the inside tip of mounting hole and install No. two elastic rubber pieces, no. two elastic rubber pieces imbed in the spacing hole that No. two drawing blackboard relative surface correspond the position and set up.
When the teaching blackboard works, when an image drawn by a teacher is large, only the first drawing blackboard is not enough to be completely drawn, one part of the image is arranged on the first drawing blackboard and the other part of the image is arranged on the second drawing blackboard, and at the moment, because the first drawing blackboard and the second drawing blackboard are not positioned on the same plane, students have poor impression on the image drawn in such a way, and the teaching quality of the teacher is influenced; therefore, when a mathematic teacher draws a graph with a large occupied area, the mounting plate is pulled to enable the second drawing blackboard to completely extend out of the first groove, the opposite side faces of the second drawing blackboard and the first drawing blackboard are close to each other, and then the second fixing bolt is rotated by rotating the second rotating plate; the second elastic rubber block at the end part of the second fixing bolt is embedded into a limiting hole arranged at the corresponding part of the second drawing blackboard, so that on one hand, the second elastic rubber block reduces the abrasion of the end part of the rotating second fixing bolt on the surface of the second drawing blackboard; on the other hand, the combination of the limiting hole and the second elastic rubber block enables the second drawing blackboard to further receive a limiting effect, and the second drawing blackboard can be kept stable in the process of drawing graphs.
The invention has the following beneficial effects:
1. according to the drawing board for mathematical education, the ash removal block, the ash removal strips and the ash removal cloth are arranged, in the moving process of the mounting plate, graphic contents drawn on the surface of the second drawing blackboard on the mounting plate are scraped by the ash removal cloth at the end part of the ash removal strip on the ash removal block, and the evenly distributed ash removal strips enable the graphic contents drawn on the surface of the second drawing blackboard to be repeatedly scraped for multiple times, so that the graphic contents on the surface of the second drawing blackboard are fully removed; and the ash removing cloth is made of chemical fiber materials and is easy to generate static electricity, so the chalk dust is fully attached to the surface of the ash removing cloth under the action of the static electricity, the chalk dust floating into the air is reduced, and discomfort of teachers and students is avoided.
2. According to the drawing board for mathematical education, the threaded holes, the first fixing bolt, the first rotating board and the first elastic rubber block are arranged, the first fixing bolt is rotated by twisting the first rotating board, the end part of the first fixing bolt extends into the second groove to extrude the ash removal block while rotating, the ash removal block is pressed to move and drives the ash removal strip to extrude the surface of the second drawing blackboard, the second drawing blackboard which is stretched out is fixed, and the second drawing blackboard can be kept stable when a teacher conducts drawing on the surface of the second drawing blackboard.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a side view of the present invention;
FIG. 4 is a cross-sectional view taken in the direction B-B of FIG. 3;
FIG. 5 is an enlarged view of a portion of FIG. 4 at C;
FIG. 6 is an enlarged view of a portion of FIG. 5 at D;
FIG. 7 is an enlarged view of a portion of FIG. 6 at E;
FIG. 8 is an enlarged view of a portion of FIG. 5 at F;
in the figure: the blackboard eraser comprises a fixed frame body 1, a fixed frame 11, a first drawing blackboard 2, a threaded hole 21, a first fixing bolt 22, a first rotating plate 221, a first elastic rubber block 222, a first groove 21, a second groove 211, a second drawing blackboard 3, a limiting hole 31, a mounting plate 4, a handle 41, a limiting block 42, a fourth groove 43, a mounting hole 44, a second fixing bolt 441, a second rotating plate 442, a second elastic rubber block 443, an ash removing block 5, a third groove 51, an ash removing strip 52, a limiting rubber sheet 521, ash removing cloth 53, a convex block 531, a pull ring 54 and a fixed elastic sheet 55.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 8, the drawing board for mathematical education according to the present invention includes a fixed frame 1, a first drawing blackboard 2, a second drawing blackboard 3, a mounting plate 4, and a dust removal block 5, wherein a fixing frame 11 is disposed at the bottom of the fixed frame 1, and the first drawing blackboard 2 is mounted in the middle of the fixed frame 1; the side wall part of the first drawing blackboard 2 is symmetrically provided with a first groove 21, a mounting plate 4 is embedded in the first groove 21, the mounting plate 4 is in sliding connection with the inner surface of the first groove 21, the part of the side wall of the mounting plate 4 far away from the first groove 21 is provided with a handle 41, and the part of the side wall of the mounting plate 4 near the first groove 21 is provided with a limiting block 42; a second drawing blackboard 3 is arranged on the surface, close to the first drawing blackboard 2, of the mounting plate 4, and the first drawing blackboard 2 is parallel to the second drawing blackboard 3; just being equipped with No. two grooves 211 to the position on No. two drawing blackboards 3 surfaces on the groove 21 internal surface, no. two groove 211 is embedded to have the piece of removing dust 5, the piece of removing dust 5 links to each other through spring and No. two groove 211 internal surfaces, and the piece of removing dust 5 just is equipped with No. three grooves 51 to the position on No. two drawing blackboards 3 surfaces, evenly install a set of ash removal strip 52 in No. three grooves 51, it is equipped with ash removal cloth 53 on the tip that ash removal strip 52 is close to No. two drawing blackboards 3, ash removal cloth 53 is the chemical fibre material.
When the teaching blackboard is in work, the fixed frame body 1 is placed in a classroom through the fixed frame 11, and when a mathematic teacher teaches mathematic knowledge and needs to draw related figures, the mathematic teacher can utilize the first drawing blackboard 2 in the middle of the fixed frame body 1 and draw the figures needing to be drawn on the surface of the first drawing blackboard 2 through chalk, so that students below can understand and record the figures conveniently; when the surface of the first drawing blackboard 2 is not enough to be used and the graphic content drawn on the surface of the first drawing blackboard 2 needs to be reserved, a teacher can draw out the mounting plate 4 through the handle 41 and draw the graphics on the surface of the second drawing blackboard 3, so that the teacher can draw more graphics while keeping the original content, and the teaching effect is improved; when the mounting plate 4 is about to be separated from the first groove 21, the limiting block 42 is in contact with the part, close to the outlet, of the inner surface of the first groove 21, so that the mounting plate 4 is limited, and the mounting plate 4 is prevented from being completely pulled out; when the course is finished, the teacher pushes the mounting plate 4 to be taken in the first groove 21 through the handle 41, in the moving process of the mounting plate 4, the graphic content drawn on the surface of the second drawing blackboard 3 on the mounting plate 4 is scraped by the dust removing cloth 53 at the end part of the dust removing strip 52 on the dust removing block 5, and the uniformly distributed dust removing strips 52 enable the graphic content drawn on the surface of the second drawing blackboard 3 to be repeatedly scraped for many times, so that the graphic content on the surface of the second drawing blackboard 3 is fully removed, the workload of the teacher for cleaning the drawing graphics is reduced, and the teacher can directly draw on the second drawing blackboard 3 when the mounting plate 4 is drawn out next time; when the dust removing cloth 53 provided at the end of the dust removing strip 52 is used for removing the graphic contents drawn by the chalk on the second drawing blackboard 3, the chalk dust composing the graphic contents is left on the dust removing cloth 53 under the friction action because the surface of the dust removing cloth 53 is rough; dusting cloth 53 is in the scraping effect with No. two drawing blackboard 3 surfaces and continuously vibrates, the inside fibre of dusting cloth 53 produces static by friction each other under the vibration effect by oneself, and because dusting cloth 53 is the chemical fibre material, static is difficult for losing easy accumulation, consequently the chalk dust fully adheres to on dusting cloth 53 surface under the electrostatic action, the chalk dust in the air of wafing into has been reduced, avoid getting into the chalk dust in the air too much, lead to the chalk dust to fall on one's body mr and student in a large number, cause mr and student's discomfort.
As a specific embodiment of the invention, a group of threaded holes 21 are formed in the surface of the first drawing blackboard 2 close to the side wall, the threaded holes 21 are communicated with the inside of the second groove 211 and are intensively positioned on the first drawing blackboard 2 close to the fixed frame 1, a first fixing bolt 22 is mounted on each threaded hole 21, the end of the first fixing bolt 22 penetrates through the threaded holes 21 and contacts with the surface of the ash removing block 5, a first rotating plate 221 is arranged on the end of the first fixing bolt 22 far from the second groove 211, and a first elastic rubber block 222 is arranged at the end of the first fixing bolt 22 contacting with the surface of the ash removing block 5.
In the working process, in order to ensure that the second drawing blackboard 3 can be kept stable when drawing a figure, in the process of drawing the mounting plate 4 out, a part of the second drawing blackboard 3 is kept in the first groove 21 and is just opposite to the second groove 211, then a teacher rotates the first fixing bolt 22 by twisting the first rotating plate 221, and because the screw thread on the first fixing bolt 22 is meshed with the screw thread on the screw hole 21, the end part of the first fixing bolt 22 extends into the second groove 211 while rotating to press the dust removing block 5, so that the dust removing block 5 is pressed to move and drives the dust removing strip 52 to press the surface of the second drawing blackboard 3, the second drawing blackboard 3 which is already extended is fixed, and the second drawing blackboard 3 can be kept stable when the teacher draws the figure on the surface of the second drawing blackboard 3; when the graphic content needs to be cleaned, the first fixing bolt 22 is rotated to reduce the pressure between the second drawing blackboard 3 and the dust removal block 5, meanwhile, the second drawing blackboard 3 is ensured to be in close contact with the dust removal block 5, and then the second drawing blackboard 3 is pushed, so that the dust removal block 5 can clean the graphic content on the surface of the second drawing blackboard 3; through the buffering effect of the first elastic rubber block 222, the abrasion to the surface of the ash removing block 5 caused by the rotation of the end part of the first fixing bolt 22 is reduced, so that the ash removing block 5 can work normally; if the teacher does not completely explain the contents of the teaching materials because of time problems, the drawing contents need to be reserved so as to facilitate the continuous explanation in the next course; but there is other mr's course between twice course, in order to avoid causing the influence to other mr's course, mathematics mr can be in advance with the graphic content record that can't explain totally on No. two drawing blackboards 3, and wipe off the content that has explained totally on No. one drawing blackboard 2, be convenient for other mr's use, subsequently through rotating fixing bolt 22 No. one, make a fixing bolt 22 tip remove to the direction of keeping away from ash removal block 5, ash removal block 5 no longer receives the extrusion and resets under the effect of continuous spring this moment, ash removal strip 52 drives ash removal cloth 53 and leaves No. two drawing blackboards 3 surface along with ash removal block 5, at this moment through handle 41 with No. two blackboards 3 income No. one groove 21 inside, the content on No. two drawing blackboards 3 surfaces can not receive the influence of ash removal cloth 53 and can obtain complete the reservation, and the drawing content on No. two drawing blackboards 3 who income No. one groove 21 also obtains hiding, can not influence other mr's lecture experience.
In one embodiment of the present invention, the dust removing cloths 53 are arranged in multiple layers, and the opposite surfaces of the adjacent dust removing cloths 53 are uniformly provided with the protrusions 531.
When the chalk dust remover works, in the scraping process, because the dust removing cloth 53 on the surface of the dust removing roller is arranged in a plurality of layers, the dust removing cloth 53 of the adjacent layers are in relative contact and slide, and the static electricity on the dust removing cloth 53 is increased by the sliding friction between the adjacent dust removing cloth 53, so that the dust removing cloth 53 further adsorbs the falling chalk dust in the scraping process, and the chalk dust entering the air is further reduced; the bumps 531 evenly arranged on the opposite surfaces of the adjacent dust removing cloths 53 keep the gaps among the dust removing cloths 53, so that the adjacent dust removing cloths 53 are prevented from being adhered together under the action of static electricity, and the relative sliding among the adjacent dust removing cloths 53 is ensured; and the chalk dust that ash removing cloth 53 was clear away can get into the clearance between the adjacent ash removing cloth 53 to receive adjacent ash removing cloth 53 and lug 531's limiting displacement, make the chalk dust receive spacing and can't fly away everywhere, reduced the harmful effects of the chalk dust of flying to teachers and students.
In an embodiment of the present invention, the dust removing strip 52 is made of an elastic material, the side wall of the dust removing strip 52 is uniformly provided with a limiting rubber sheet 521, and the end of the limiting rubber sheet 521 inclines in a direction away from the first drawing blackboard 2.
When the blackboard eraser is in work, because the ash removing strips 52 are made of elastic materials, when a teacher pushes the mounting plate 4 to be put into the first groove 21, the ash removing strips 52 scrape the surfaces of the second drawing blackboard 3, when the friction action on the ash removing strips 52 is large, the ash removing strips 52 are pressed, bent and deformed, the end parts of the ash removing cloth 53 on the ash removing strips 52 collide with the end parts of the limiting rubber sheets 521 on the side surfaces of the adjacent ash removing strips 52, so that the dust accumulated on the end parts of the ash removing cloth 53 is cleaned, the problem that the end parts of the ash removing cloth 53, which are in contact with the surfaces of the second drawing blackboard 3, cannot normally work due to excessive accumulated dust is avoided, and when the friction action on the ash removing strips 52 is reduced, the ash removing strips 52 are deformed and recovered; and the chalk dust that ash removing cloth 53 cleared up has some to drift to the clearance position between spacing rubber piece 521 and ash removing strip 52 lateral wall to receive the limiting displacement of spacing rubber piece 521, avoid being located the chalk dust that the clearance position between spacing rubber piece 521 and ash removing strip 52 lateral wall drifts to the external world or adheres to the surface on No. two drawing blackboard 3 again, reduce the harmful effects to teachers and students.
As a specific embodiment of the present invention, the second groove 211 sequentially penetrates the bottom of the first drawing blackboard 2 and the bottom of the fixed frame 1, and is communicated with the outside; the bottom of the ash removing block 5 extends out of the bottom of the second groove 211 and is provided with a pull ring 54, a fixing elastic sheet 55 is arranged on the side wall of the ash removing block 5 close to the bottom, and the fixing elastic sheet 55 is tightly contacted with the side surface of the bottom of the second groove 211; one end of a spring in the second groove 211 is fixed with the inner surface of the second groove 211, and the other end of the spring is in surface contact with the ash removal block 5.
When the dust removing block 5 works normally, the fixing elastic sheet 55 at the bottom of the dust removing block 5 is in close contact with the inner surface of the second groove 211, so that the dust removing block 5 is fixed under the friction action between the fixing elastic sheet 55 and the inner surface of the second groove 211; when the dust removing block 5 works for a period of time, and the cleaning effect of the dust removing block 5 on the graphic content on the surface of the second drawing blackboard 3 is not ideal, the dust removing block 5 is pulled out from the lower part of the fixed frame 1 through the pull ring 54, the dust removing strips 52 and the dust removing cloth 53 on the dust removing block 5 are cleaned, and the dust removing block 5 is pulled out from the lower part of the fixed frame 1, so that the chalk dust brought out in the process of pulling out the dust removing block 5 is concentrated at the part below the fixed frame 1, close to the ground, and the chalk dust is prevented from floating to a high position and is difficult to settle on the ground; after cleaning is finished, the ash removing block 5 is inserted into the second groove 211 again, so that the ash removing block 5 can function normally.
As a specific embodiment of the present invention, the second drawing blackboard 3 is embedded into a fourth groove 43 arranged on the surface of the mounting plate 4, and the second drawing blackboard 3 is slidably connected with the fourth groove 43; the part of the second drawing blackboard 3 close to the inner surface of the fourth groove 43 is contacted with the inner surface of the fourth groove 43 through uniformly arranged springs; mounting holes 44 are uniformly formed in the back of the mounting plate 4 close to the middle, and threads are formed in the inner surface of each mounting hole 44; a second fixing bolt 441 is mounted on each mounting hole 44, and threads on the second fixing bolt 441 are meshed with threads on the inner surface of each mounting hole 44; the end part of the second fixing bolt 441 far away from the mounting hole 44 is provided with a second rotating plate 442, the end part of the second fixing bolt 441 extending into the mounting hole 44 is provided with a second elastic rubber block 443, and the second elastic rubber block 443 is embedded into a limiting hole 31 arranged at a corresponding part of the opposite surface of the second drawing blackboard 3.
When the teaching blackboard works, when an image drawn by a teacher is large, only the first drawing blackboard 2 is used, and the image cannot be drawn completely, so that one part of the image is arranged on the first drawing blackboard 2, and the other part of the image is arranged on the second drawing blackboard 3, at the moment, because the first drawing blackboard 2 and the second drawing blackboard 3 are not in the same plane, the students have poor impression on the image drawn in the way, and the teaching quality of the teacher is influenced; therefore, when a mathematic teacher draws a graph with a large occupied area, the mounting plate 4 is pulled to enable the second drawing blackboard 3 to completely extend out of the first groove 21, the opposite side faces of the second drawing blackboard 3 and the first drawing blackboard 2 are close to each other, and then the second rotating plate 442 is rotated to enable the second fixing bolt 441 to rotate, because the threads on the second fixing bolt 441 are meshed with the threads on the inner surface of the mounting hole 44, the end of the rotated second fixing bolt 441 extends into the fourth groove 43 and extrudes the second drawing blackboard 3, so that the second drawing blackboard 3 moves in the direction away from the fourth groove 43 until the surface of the second drawing blackboard 3 is flush with the surface of the first drawing blackboard 2, at the moment, the first drawing blackboard 2 and the second drawing blackboard 3 are located on the same plane, and a line segment of the image drawn by the mathematic teacher can smoothly extend from the first drawing blackboard 2 to the second drawing blackboard 3, so that the difficulty of the mathematic teacher in drawing the graph is reduced, and students can conveniently understand the graph; the second elastic rubber block 443 at the end of the second fixing bolt 441 is embedded into the limiting hole 31 arranged at the corresponding position of the second drawing blackboard 3, so that on one hand, the second elastic rubber block 443 reduces the abrasion of the end of the rotating second fixing bolt 441 on the surface of the second drawing blackboard 3; on the other hand, the combination of the limiting hole 31 and the second elastic rubber block 443 enables the second drawing blackboard 3 to further receive a limiting effect, and the second drawing blackboard 3 can be kept stable in the process of drawing graphs.
The specific working process is as follows:
the fixing frame body 1 is placed in a classroom through the fixing frame 11, when a mathematic teacher teaches mathematic knowledge and needs to draw related figures, the mathematic teacher can utilize the first drawing blackboard 2 in the middle of the fixing frame body 1 and draw the figures needing to be drawn on the surface of the first drawing blackboard 2 through chalk, and students below can understand and record the figures conveniently; when the surface of the first drawing blackboard 2 is not enough to be used and the graphic contents already drawn on the surface of the first drawing blackboard 2 need to be reserved, a teacher can draw out the mounting plate 4 through the handle 41 and draw the graphics on the surface of the second drawing blackboard 3, so that the teacher can draw more graphics while reserving the original contents, and the teaching effect is improved; when the mounting plate 4 is about to be separated from the first groove 21, the limiting block 42 is in contact with the part, close to the outlet, of the inner surface of the first groove 21, so that the mounting plate 4 is limited, and the mounting plate 4 is prevented from being completely pulled out; when the course is finished, the teacher pushes the mounting plate 4 to be taken in the first groove 21 through the handle 41, in the moving process of the mounting plate 4, the graphic contents drawn on the surface of the second drawing blackboard 3 on the mounting plate 4 are scraped by the dust removing cloth 53 at the end part of the dust removing strip 52 on the dust removing block 5, and the uniformly distributed dust removing strips 52 enable the graphic contents drawn on the surface of the second drawing blackboard 3 to be repeatedly scraped for many times, so that the graphic contents on the surface of the second drawing blackboard 3 are fully removed, the workload of clearing the drawing by the teacher is reduced, and the teacher can directly draw on the second drawing blackboard 3 when the mounting plate 4 is drawn out next time; when the dust removing cloth 53 provided at the end of the dust removing strip 52 is used for removing the graphic contents drawn by the chalk on the second drawing blackboard 3, the chalk dust composing the graphic contents is left on the dust removing cloth 53 under the friction action because the surface of the dust removing cloth 53 is rough; the dust removing cloth 53 continuously vibrates in the scraping action with the surface of the second drawing blackboard 3, fibers in the dust removing cloth 53 automatically rub with each other under the vibration action to generate static electricity, and the static electricity is not easy to dissipate and accumulate because the dust removing cloth 53 is made of chemical fiber materials, so that the chalk dust is fully attached to the surface of the dust removing cloth 53 under the static electricity action, the chalk dust floating into the air is reduced, and the phenomenon that the chalk dust in the air is too much to fall onto the bodies of teachers and students to cause discomfort of the teachers and students is avoided; in order to ensure that the second drawing blackboard 3 can be kept stable when a figure is drawn, in the process of drawing out the mounting plate 4, a part of the second drawing blackboard 3 is ensured to be left in the first groove 21 and opposite to the second groove 211, then a teacher rotates the first fixing bolt 22 by twisting the first rotating plate 221, and because the screw thread on the first fixing bolt 22 is meshed with the screw thread on the threaded hole 21, the end part of the first fixing bolt 22 extends into the second groove 211 while rotating to press the dust removing block 5, so that the dust removing block 5 is pressed to move and drives the dust removing strip 52 to press the surface of the second drawing blackboard 3, the extended second drawing blackboard 3 is fixed, and the second drawing blackboard 3 can be kept stable when the teacher draws the figure on the surface of the second blackboard 3; when the graphic content needs to be cleaned, the first fixing bolt 22 is rotated to reduce the pressure between the second drawing blackboard 3 and the dust removal block 5, meanwhile, the second drawing blackboard 3 is ensured to be in close contact with the dust removal block 5, and then the second drawing blackboard 3 is pushed, so that the dust removal block 5 can clean the graphic content on the surface of the second drawing blackboard 3; through the buffering effect of the first elastic rubber block 222, the abrasion to the surface of the ash removing block 5 caused by the rotation of the end part of the first fixing bolt 22 is reduced, so that the ash removing block 5 can work normally; if the teacher does not completely explain the contents of the teaching materials because of time problems, the drawing contents need to be reserved so as to facilitate the continuous explanation in the next course; however, there are courses of other teachers between the two courses, in order to avoid affecting the courses of other teachers, the math teachers can record the graphic contents which cannot be completely explained on the second drawing blackboard 3 in advance, erase the completely explained contents on the first drawing blackboard 2, and facilitate the use of other teachers, then the end of the first fixing bolt 22 is moved in the direction away from the dust removing block 5 by rotating the first fixing bolt 22, at this time, the dust removing block 5 is not squeezed and is reset under the action of the connecting spring, the dust removing strip 52 drives the dust removing cloth 53 to leave the surface of the second drawing blackboard 3 along with the dust removing block 5, at this time, the second blackboard 3 is collected into the first groove 21 through the handle 41, the contents on the surface of the second drawing blackboard 3 are not affected by the dust removing cloth 53 and can be completely reserved, and the drawing contents on the second drawing blackboard 3 collected into the first groove 21 are also hidden, and the lecture experience of other teachers is not affected; because the dust removing strip 52 is made of elastic material, when a teacher pushes the mounting plate 4 to be accommodated in the first groove 21, the dust removing strip 52 scrapes the surface of the second drawing blackboard 3, when the friction action on the dust removing strip 52 is large, the dust removing strip 52 is pressed to bend and deform, and the end part of the dust removing cloth 53 on the dust removing strip 52 collides with the end part of the limiting rubber sheet 521 on the side surface of the adjacent dust removing strip 52, so that the dust accumulated on the end part of the dust removing cloth 53 is cleaned, the problem that the end part of the dust removing cloth 53 contacting the surface of the second drawing blackboard 3 cannot normally work due to excessive dust accumulation is avoided, and when the friction action on the dust removing strip 52 is reduced, the dust removing strip 52 deforms and recovers; part of the chalk dust cleaned by the dust removing cloth 53 is scattered to the gap between the limiting rubber sheet 521 and the side wall of the dust removing strip 52 and is limited by the limiting rubber sheet 521, so that the chalk dust at the gap between the limiting rubber sheet 521 and the side wall of the dust removing strip 52 is prevented from being scattered to the outside or being attached to the surface of the second drawing blackboard 3 again, and the adverse effect on teachers and students is reduced; when an image drawn by a mathematic teacher is large, only the first drawing blackboard 2 is used, and the image is not fully drawn, so that one part of the image is arranged on the first drawing blackboard 2, and the other part of the image is arranged on the second drawing blackboard 3, and at the moment, because the first drawing blackboard 2 and the second drawing blackboard 3 are not in the same plane, students have poor impression on the image drawn in such a way, and the teaching quality of the teacher is influenced; therefore, when a mathematic teacher draws a graph with a large occupied area, the mounting plate 4 is pulled to enable the second drawing blackboard 3 to completely extend out of the first groove 21, the opposite side faces of the second drawing blackboard 3 and the first drawing blackboard 2 are close to each other, and then the second rotating plate 442 is rotated to enable the second fixing bolt 441 to rotate, because the threads on the second fixing bolt 441 are meshed with the threads on the inner surface of the mounting hole 44, the end of the rotated second fixing bolt 441 extends into the fourth groove 43 and extrudes the second drawing blackboard 3, so that the second drawing blackboard 3 moves in the direction away from the fourth groove 43 until the surface of the second drawing blackboard 3 is flush with the surface of the first drawing blackboard 2, at the moment, the first drawing blackboard 2 and the second drawing blackboard 3 are located on the same plane, and a line segment of the image drawn by the mathematic teacher can smoothly extend from the first drawing blackboard 2 to the second drawing blackboard 3, so that the difficulty of the mathematic teacher in drawing the graph is reduced, and students can conveniently understand the graph; the second elastic rubber block 443 at the end of the second fixing bolt 441 is embedded into the limiting hole 31 arranged at the corresponding position of the second drawing blackboard 3, so that on one hand, the second elastic rubber block 443 reduces the abrasion of the end of the rotating second fixing bolt 441 on the surface of the second drawing blackboard 3; on the other hand, the combination of the limiting hole 31 and the second elastic rubber block 443 enables the second drawing blackboard 3 to further receive a limiting effect, and the second drawing blackboard 3 can be kept stable in the process of drawing graphs.
The front, the back, the left, the right, the upper and the lower are all based on figure 1 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and so on.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. The utility model provides a drawing board for mathematical education which characterized in that: the dust removing device comprises a fixed frame body (1), a first drawing blackboard (2), a second drawing blackboard (3), a mounting plate (4) and a dust removing block (5), wherein a fixed frame (11) is arranged at the bottom of the fixed frame body (1), and the first drawing blackboard (2) is arranged in the middle of the fixed frame body (1); the side wall of the first drawing blackboard (2) is symmetrically provided with a first groove (21), a mounting plate (4) is embedded in the first groove (21), the mounting plate (4) is connected with the inner surface of the first groove (21) in a sliding manner, handles (41) are arranged at positions, far away from the first groove (21), of the side wall of the mounting plate (4), and limiting blocks (42) are arranged at positions, close to the first groove (21), of the side wall of the mounting plate (4); a second drawing blackboard (3) is arranged on the surface, close to the first drawing blackboard (2), of the mounting plate (4), and the first drawing blackboard (2) is parallel to the second drawing blackboard (3); the inner surface of the first groove (21) is provided with a second groove (211) opposite to the surface of the second drawing blackboard (3), an ash removal block (5) is embedded in the second groove (211), the ash removal block (5) is connected with the inner surface of the second groove (211) through a spring, a third groove (51) opposite to the surface of the second drawing blackboard (3) is provided with the ash removal block (5), a group of ash removal strips (52) are uniformly arranged in the third groove (51), ash removal cloth (53) is arranged on the end part, close to the second drawing blackboard (3), of each ash removal strip (52), and the ash removal cloth (53) is made of chemical fiber;
the surface of the first drawing blackboard (2) is provided with a group of threaded holes (21) close to the side wall, the threaded holes (21) are communicated with the inside of the second groove (211) and are intensively positioned at the position, close to the fixing frame body (1), on the first drawing blackboard (2), each threaded hole (21) is provided with a fixing bolt (22), the end part of the first fixing bolt (22) penetrates through the threaded holes (21) and is in contact with the surface of the ash removal block (5), the end part, far away from the second groove (211), of the first fixing bolt (22) is provided with a first rotating plate (221), and the end part, in surface contact with the ash removal block (5), of the first fixing bolt (22) is provided with a first elastic rubber block (222);
the ash removing cloth (53) is arranged in multiple layers, and the opposite surfaces of the adjacent ash removing cloth (53) are uniformly provided with convex blocks (531);
the dust removing strip (52) is made of elastic materials, the side wall of the dust removing strip (52) is evenly provided with a limiting rubber sheet (521), and the end part of the limiting rubber sheet (521) inclines towards the direction far away from the first drawing blackboard (2).
2. A drawing board for mathematics teaching as claimed in claim 1, wherein: the second groove (211) penetrates through the bottom of the first drawing blackboard (2) and the bottom of the fixed frame body (1) in sequence and is communicated with the outside; the bottom of the ash removing block (5) extends out of the bottom of the second groove (211) and is provided with a pull ring (54), a fixing elastic sheet (55) is arranged on the side wall of the ash removing block (5) close to the bottom, and the fixing elastic sheet (55) is tightly contacted with the side face of the bottom of the second groove (211); one end of a spring in the second groove (211) is fixed with the inner surface of the second groove (211), and the other end of the spring is in surface contact with the ash removal block (5).
3. A drawing board for mathematics teaching as claimed in claim 2, wherein: the second drawing blackboard (3) is embedded into a fourth groove (43) formed in the surface of the mounting plate (4), and the second drawing blackboard (3) is connected with the fourth groove (43) in a sliding manner; the part of the second drawing blackboard (3) close to the inner surface of the fourth groove (43) is contacted with the inner surface of the fourth groove (43) through uniformly arranged springs; mounting holes (44) are uniformly formed in the back of the mounting plate (4) close to the middle, and threads are arranged on the inner surface of each mounting hole (44); a second fixing bolt (441) is mounted on each mounting hole (44), and threads on the second fixing bolt (441) are meshed with threads on the inner surface of each mounting hole (44); the end part, far away from the mounting hole (44), of the second fixing bolt (441) is provided with a second rotating plate (442), the end part, extending into the mounting hole (44), of the second fixing bolt (441) is provided with a second elastic rubber block (443), and the second elastic rubber block (443) is embedded into a limiting hole (31) formed in the corresponding part of the opposite surface of the second drawing blackboard (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111082827.8A CN113602028B (en) | 2021-09-15 | 2021-09-15 | Drawing board for mathematical education |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111082827.8A CN113602028B (en) | 2021-09-15 | 2021-09-15 | Drawing board for mathematical education |
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| Publication Number | Publication Date |
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| CN113602028A CN113602028A (en) | 2021-11-05 |
| CN113602028B true CN113602028B (en) | 2023-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111082827.8A Active CN113602028B (en) | 2021-09-15 | 2021-09-15 | Drawing board for mathematical education |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0375031A (en) * | 1989-06-26 | 1991-03-29 | Climbminster Ltd | Cleaning implement and making thereof |
| CN201808372U (en) * | 2010-09-15 | 2011-04-27 | 郭依波 | Multifunctional intelligent board eraser |
| CN104299526A (en) * | 2014-11-11 | 2015-01-21 | 成都艾塔科技有限公司 | Outdoor digital signage capable of automatic dust removal |
| CN207666529U (en) * | 2017-07-07 | 2018-07-31 | 小狗电器互联网科技（北京）股份有限公司 | A kind of round brush and its dust catcher |
| CN208850826U (en) * | 2018-05-21 | 2019-05-14 | 咸阳师范学院 | A kind of landscape design combined type drawing table |
| CN210881476U (en) * | 2019-07-12 | 2020-06-30 | 哈尔滨金融学院 | Device is erased with chalk to college english mr teaching |
| CN112109476A (en) * | 2020-09-30 | 2020-12-22 | 日照职业技术学院 | Multifunctional teaching device for Chinese teaching |
| CN212353384U (en) * | 2020-04-07 | 2021-01-15 | 渤海大学 | English teaching board convenient to operation demonstration |
| WO2021014289A1 (en) * | 2019-07-23 | 2021-01-28 | Polyvision, Naamloze Vennootschap | Utility holder for a metal whiteboard |
-
2021
- 2021-09-15 CN CN202111082827.8A patent/CN113602028B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0375031A (en) * | 1989-06-26 | 1991-03-29 | Climbminster Ltd | Cleaning implement and making thereof |
| CN201808372U (en) * | 2010-09-15 | 2011-04-27 | 郭依波 | Multifunctional intelligent board eraser |
| CN104299526A (en) * | 2014-11-11 | 2015-01-21 | 成都艾塔科技有限公司 | Outdoor digital signage capable of automatic dust removal |
| CN207666529U (en) * | 2017-07-07 | 2018-07-31 | 小狗电器互联网科技（北京）股份有限公司 | A kind of round brush and its dust catcher |
| CN208850826U (en) * | 2018-05-21 | 2019-05-14 | 咸阳师范学院 | A kind of landscape design combined type drawing table |
| CN210881476U (en) * | 2019-07-12 | 2020-06-30 | 哈尔滨金融学院 | Device is erased with chalk to college english mr teaching |
| WO2021014289A1 (en) * | 2019-07-23 | 2021-01-28 | Polyvision, Naamloze Vennootschap | Utility holder for a metal whiteboard |
| CN212353384U (en) * | 2020-04-07 | 2021-01-15 | 渤海大学 | English teaching board convenient to operation demonstration |
| CN112109476A (en) * | 2020-09-30 | 2020-12-22 | 日照职业技术学院 | Multifunctional teaching device for Chinese teaching |
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| CN113602028A (en) | 2021-11-05 |
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