CN112895766B - Drawing device for mathematical statistics - Google Patents
Drawing device for mathematical statistics Download PDFInfo
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- CN112895766B CN112895766B CN202110236418.2A CN202110236418A CN112895766B CN 112895766 B CN112895766 B CN 112895766B CN 202110236418 A CN202110236418 A CN 202110236418A CN 112895766 B CN112895766 B CN 112895766B
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- side wall
- teaching box
- box body
- teaching
- protection
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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
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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 drawing device for mathematics statistics, which comprises a teaching box body, a magnetic driving mechanism, a protection mechanism and a cleaning mechanism, wherein a lifting handle is fixedly arranged on the upper side wall of the teaching box body, the protection mechanism comprises a baffle base fixedly arranged on the side wall of the teaching box body, two protection baffles capable of protecting a teaching blackboard are symmetrically arranged on the inner side wall of the baffle base along the central axis of the baffle base, the two protection baffles are in sliding connection with the baffle base, and an elastic telescopic rod is fixedly arranged between the lower side walls of the two protection baffles and the side wall of the baffle base. The invention realizes the bidirectional panel dust removal function before and after use and the protection function after the teaching panel is used by the magnetic force and the driving action of the bevel gear, and in addition, the double accompanying cleaning function of the antistatic dust removal fluff brush arranged on the inner side wall of the protection baffle is realized by utilizing the elastic action of the elastic telescopic rod in the closing and opening processes of the protection baffle.
Description
Technical Field
The invention relates to the technical field of statistics teaching devices, in particular to a drawing device for mathematics statistics.
Background
With the gradual popularization of knowledge, the statistical drawing is gradually applied to practice in use, not only can be used in teaching, but also can be used for counting and summarizing the number of materials and drawing in life and engineering, and therefore, the manufacturing of the statistical drawing device which is convenient to use and practical is particularly important.
Through the retrieval, in the case of the official file that the notice number is CN211264704U, a probability statistics teaching device has been proposed, to current statistics teaching device be not convenient for directly perceived convenient show cylindricality picture, and teaching device's bandwagon effect is single, the problem that can not adjust, now proposes following scheme, and it includes the fixed plate, the top fixed mounting of fixed plate has the riser, and one side fixed mounting of riser has a plurality of chi boards, and the mounting hole has been seted up at the fixed plate top, and fixed mounting has the mounting panel in the mounting hole, and the device is convenient for directly perceived convenient show cylindricality picture, and teaching device's bandwagon effect is abundant, conveniently adjusts different show angle and position.
In the statistics teaching device convenient to carry in the past, can exist because the device that the condition of falling appears damages the phenomenon, not only delayed the teaching quality, more can gather the engineering material in the engineering and cause certain delay, influenced the normal clear of engineering, in addition, in statistics teaching device in the past, when teaching uses, there is more dust on the teaching panel, the dust is piled up too much then can lead to the teaching panel dirty and disorderly, influence the teaching quality, for solving above-mentioned problem, a drawing device for statistics has been provided.
Disclosure of Invention
The invention aims to solve the defects that a drawing panel is easy to be messy and damaged in the prior art, and provides a drawing device for mathematical statistics.
In order to achieve the purpose, the invention adopts the following technical scheme:
a drawing device for mathematics statistics comprises a teaching box body, a magnetic driving mechanism, a protection mechanism and a cleaning mechanism, wherein a carrying handle is fixedly arranged on the upper side wall of the teaching box body;
the protection mechanism comprises a baffle base fixedly installed on the side wall of the teaching box body, two protection baffles capable of protecting the teaching blackboard are symmetrically installed on the inner side wall of the baffle base along the central axis of the baffle base, the two protection baffles are in sliding connection with the baffle base, an elastic telescopic rod is fixedly installed between the lower side wall of each protection baffle and the side wall of the baffle base, the inner side walls of the two protection baffles are fixedly connected with a driving traction rope, the driving traction rope is fixedly connected with the magnetic driving mechanism, and the other end of the driving traction rope is fixedly connected with the magnetic driving mechanism;
clean mechanism includes the extrusion stem of fixed mounting lateral wall on the guard flap, sliding connection carries out between the inside wall of extrusion stem and teaching box, the lateral wall fixedly connected with extrusion piece of extrusion stem, the lateral wall fixed mounting of teaching box has clean pipe, sliding connection carries out between the inside wall of clean pipe and the lateral wall of extrusion piece, the fixed clear inlet scoop of dust absorption of having seted up of lateral wall of clean pipe, the fixed clear blowing mouth of blowing dust of having seted up of lateral wall of clean pipe.
Preferably, the magnetic driving mechanism comprises a sliding block which is in sliding connection with the side wall of the teaching box body, the outer side wall of the sliding block is fixedly connected with a powerful magnetic block, the inner side wall of the teaching box body is rotatably connected with a first bevel gear, the inner side wall of the first bevel gear is in threaded connection with a threaded rotating rod, the threaded rotating rod is fixedly connected with a powerful magnetic block, a connecting spring is fixedly connected between the inner side wall of the teaching box body and the sliding block, two rotating shafts are symmetrically arranged on the inner side wall of the teaching box body along the central axis of the teaching box body, the two rotating shafts are rotatably connected with the inner side wall of the teaching box body, a second bevel gear is fixedly connected with the side wall of the two rotating shafts, the second bevel gear is meshed with the first bevel gear, the side wall of the rotating shaft is fixedly connected with a wire bundling wheel, and the wire bundling wheel is fixedly connected with the other end of the driving traction rope.
Preferably, the inside wall fixed mounting of protection baffle has clean brush, clean brush adopts dustproof antistatic fur brush.
Preferably, the teaching box body is integrally made of a light stable material, the traction rope is driven to be made of a wear-resistant material, and the baffle base is arranged in a curved structure.
Preferably, the mouth end fixed mounting of inlet scoop has one-way admission valve, the mouth end fixed mounting of blowing mouth has one-way air outlet valve, the inside wall fixed mounting of inlet scoop has the dust absorption to deposit the bag, the bag lateral wall is deposited in the dust absorption adopts aperture high density filter screen.
Preferably, the connecting spring is sleeved on the outer side wall of the threaded rotating rod and cannot be contacted.
Preferably, sliding connection is carried out between the lateral wall of screw thread bull stick and teaching box, the lateral wall fixed mounting of screw thread bull stick has the limiting plate, the limiting plate side sets up for square structure, the sliding block is provided with the spacing buckle that can not take place the rotation when the sliding block slides with teaching box's junction.
Preferably, sliding connection is carried out between the lateral wall of powerful magnetic path and the inside wall of teaching box, when powerful magnetic path was adsorbed to the outermost end, the lateral wall of screw thread bull stick can not take place to break away from with the inside wall of teaching box between, the sliding block adopts insulating material.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention realizes the working procedure of loosening the traction rope by the cooperation of the protection mechanism and the cleaning mechanism, the strong magnetic block pulls the sliding block to slide outwards under the magnetic force action of the strong magnetic block, the sliding block pulls the threaded rotating rod to move outwards, the stable fixity between the threaded rotating rod and the sliding block can be realized due to the fixed connection between the threaded rotating rod and the sliding block and the arrangement of the threaded structure of the threaded rotating rod and the arrangement of the limiting plate, when the sliding block slides outwards, the side wall of the threaded rotating rod cannot be separated from the inner side wall of the teaching box body due to the fact that the strong magnetic block is adsorbed to the outermost end, the first bevel gear in threaded connection with the threaded rotating rod rotates in the sliding process of the threaded rotating rod, the two second bevel gears in meshing with the first bevel gear rotate simultaneously, and the wire bundling wheel starts to rotate, because the number of turns of screw thread is comparatively intensive between the limiting plate, when first bevel gear rotated the round, the bunch wheel can rotate many rings to realize driving the promotion of haulage rope release length, utilize magnetic force and bevel gear's drive effect, realized the two-way panel dust removal function before and after the use and the guard action after the teaching panel used.
2. The invention uses the cooperation of the magnetic driving mechanism and the cleaning mechanism, under the action of the elastic telescopic rod, the extrusion rod pushes the extrusion block to begin to extrude the cleaning pipe, because the mouth ends of the residual air blowing ports of the air suction ports are all arranged as one-way valve ports, the air pressure of the cleaning pipe is discharged through the air blowing ports, in the extrusion process, the antistatic dust removal fluff brush arranged on the inner side wall of the protective baffle is acted by the wind pressure discharged by the blowing port, thereby realizing the concomitant blowing dust removal function in the moving process, when the protective baffle is closed inwards, the antistatic electric precipitation fluff brush arranged on the inner side wall of the protective baffle is under the suction action of the air suction opening, thereby realizing the function of accompanying dust collection when closing, utilizing the elastic action of the elastic telescopic rod, the dual accompanying cleaning function of the antistatic dust removal fur brush in the protective baffle is realized in the closing and opening processes of the protective baffle.
In conclusion, the dust removal function of the bidirectional panel before and after use and the protection function of the teaching panel after use are realized through the magnetic force and the driving action of the bevel gear, and in addition, the double accompanying cleaning function of the antistatic dust removal fur brush arranged on the inner side wall of the protection baffle is realized in the closing and opening processes of the protection baffle by utilizing the elastic action of the elastic telescopic rod.
Drawings
FIG. 1 is a schematic front view of a drawing apparatus for mathematical statistics according to the present invention;
FIG. 2 is a schematic side view of an external structure of a mathematical statistics plotting apparatus according to the present invention;
FIG. 3 is a schematic side view of an internal structure of a mathematical statistics plotting apparatus according to the present invention;
FIG. 4 is a schematic top view of a drawing apparatus for mathematical statistics according to the present invention;
FIG. 5 is a schematic view of a three-dimensional structure of a protective baffle of a mathematical statistics plotting apparatus according to the present invention;
FIG. 6 is an enlarged view of the structure A of the drawing apparatus for mathematical statistics according to the present invention;
fig. 7 is an enlarged schematic view of a structure B of a drawing apparatus for mathematical statistics according to the present invention.
In the figure: the device comprises a teaching box body 1, a sliding block 2, a powerful magnetic block 3, a threaded rotating rod 4, a connecting spring 5, a first bevel gear 6, a second bevel gear 7, a rotating shaft 8, a wire bundling wheel 9, a traction rope 10, a protective baffle 11, a baffle base 12, an elastic telescopic rod 13, an extrusion rod 14, a cleaning pipe 15, an air suction opening 16, an air blowing opening 17, an extrusion block 18, a carrying handle 19 and a limiting plate 20.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-7, a drawing device for mathematics statistics comprises a teaching box body 1, a magnetic driving mechanism, a protection mechanism and a cleaning mechanism, wherein a carrying handle 19 is fixedly arranged on the upper side wall of the teaching box body 1;
the protection mechanism comprises a baffle base 12 fixedly installed on the side wall of the teaching box body 1, two protection baffles 11 capable of protecting the teaching blackboard are symmetrically installed on the inner side wall of the baffle base 12 along the central axis of the baffle base 12, the two protection baffles 11 are in sliding connection with the baffle base 12, an elastic telescopic rod 13 is fixedly installed between the lower side wall of each protection baffle 11 and the side wall of the baffle base 12, the inner side walls of the two protection baffles 11 are fixedly connected with a driving traction rope 10 which drives the traction rope 10 to be fixedly connected with the magnetic driving mechanism, and the other end of the driving traction rope 10 is fixedly connected with the magnetic driving mechanism;
clean mechanism includes extrusion stem 14 of fixed mounting lateral wall on protection baffle 11, sliding connection carries out between the inside wall of extrusion stem 14 and teaching box 1, extrusion stem 14's lateral wall fixedly connected with extrusion block 18, teaching box 1's lateral wall fixed mounting has clean pipe 15, sliding connection carries out between the inside wall of clean pipe 15 and the lateral wall of extrusion block 18, the fixed clear inlet scoop 16 of dust absorption of having seted up of clean pipe 15's lateral wall, the fixed clear mouth of blowing 17 that blows dirt of having seted up of clean pipe 15's lateral wall.
Magnetic drive mechanism include with teaching 1 between the lateral wall carry out sliding connection's sliding block 2, sliding block 2's lateral wall fixedly connected with powerful magnetic path 3, teaching 1's inside wall rotates and is connected with first bevel gear 6, first bevel gear 6's inside wall threaded connection has screw bull stick 4, carry out fixed connection between screw bull stick 4 and the powerful magnetic path 3, fixedly connected with coupling spring 5 between teaching 1's inside wall and the sliding block 2, teaching 1's inside wall installs two axis of rotation 8 along teaching 1 axis symmetry, rotate between two axis of rotation 8 and the teaching 1's the inside wall and be connected, two axis of rotation 8's lateral wall fixedly connected with second bevel gear 7, mesh between second bevel gear 7 and the first bevel gear 6, axis of rotation 8's lateral wall fixedly connected with bunching wheel 9, bunching wheel 9 carries out fixed connection with the other end that drives haulage rope 10.
The inner side wall of the protective baffle 11 is fixedly provided with a cleaning brush, and the cleaning brush is a dustproof antistatic soft brush.
The whole teaching box body 1 is made of light stable materials, the traction rope 10 is driven to be made of wear-resistant materials, and the baffle base 12 is arranged in a curved structure.
A one-way air inlet valve is fixedly arranged at the opening end of the air suction opening 16, a one-way air outlet valve is fixedly arranged at the opening end of the air blowing opening 17, a dust collection storage bag is fixedly arranged on the inner side wall of the air suction opening 16, and a small-hole high-density filter screen is adopted on the side wall of the dust collection storage bag.
The connecting spring 5 is sleeved on the outer side wall of the threaded rotating rod 4 and can not be contacted.
Carry out sliding connection between the lateral wall of screw bull stick 4 and teaching box 1, the lateral wall fixed mounting of screw bull stick 4 has limiting plate 20, and limiting plate 20 side sets up for square structure, and sliding block 2 is provided with the spacing buckle that can not take place the rotation when sliding block 2 slides with teaching box 1's junction.
Carry out sliding connection powerful magnetic block 3 between the lateral wall of powerful magnetic block 3 and the inside wall of teaching box 1 and be adsorbed when the outermost end, take place to break away from between the lateral wall of screw thread bull stick 4 and the inside wall of teaching box 1, sliding block 2 adopts insulating material.
The specific working principle of the invention is as follows:
this device mainly is a portable's multi-functional statistics teaching device, because teaching box 1's whole adopts light-duty stable material, guaranteed teaching box 1's stability when realizing portable, and is simultaneously, because powerful magnetic path 3's setting, when putting on the blackboard in no matter be in the classroom, still when hanging on the iron pipe in the building site, stable fixed can all be realized, wherein powerful magnetic path 3's magnetic force is greater than teaching box 1's whole gravity.
When the teaching box body 1 is placed on a blackboard or in front of an iron pipe at the beginning of work, due to the magnetic action of the powerful magnetic block 3, the powerful magnetic block 3 pulls the sliding block 2 to slide outwards, at the moment, the sliding block 2 pulls the threaded rotating rod 4 to move outwards, due to the fixed connection between the threaded rotating rod 4 and the sliding block 2 and the threaded structure arrangement of the threaded rotating rod 4, due to the arrangement of the limiting plate 20, the stable fixity between the threaded rotating rod 4 and the sliding block 2 can be realized, when the sliding block 2 slides outwards, because the powerful magnetic block 3 is adsorbed to the outermost end, the side wall of the threaded rotating rod 4 cannot be separated from the inner side wall of the teaching box body 1, in the sliding-out process of the threaded rotating rod 4, the first bevel gear 6 in threaded connection with the threaded rotating rod 4 rotates, and the two second bevel gears 7 meshed with the first bevel gear 6 rotate simultaneously, thereby the bunched wheel 9 begins to rotate, realize the loose line process to driving haulage rope 10, because the number of screw thread turns is comparatively intensive between limiting plate 20, when first bevel gear 6 rotates the round, bunched wheel 9 can rotate many circles, thereby realize driving the promotion of haulage rope 10 release length, owing to drive the lax of haulage rope 10 and the elastic force effect of elasticity telescopic link 13, two guard flap 11 open, because the setting of the inside antistatic dust removal pappus brush that sets up of guard flap 11, can carry out cleaning action to the teaching panel of teaching box 1 lateral wall at the in-process of opening, in the above-mentioned in-process, utilize magnetic force and bevel gear's drive effect, the guard action after two-way panel dust removal function and the teaching panel use before and after using has been realized.
Meanwhile, under the action of the elastic telescopic rod 13, the extrusion rod 14 pushes the extrusion block 18 to begin to extrude the cleaning pipe 15, because the opening ends of the residual air blowing openings 17 of the air suction openings 16 are all arranged as one-way valve openings, the air pressure of the cleaning pipe 15 is discharged through the air blowing openings 17, in the extrusion process, the antistatic dust removal fluff brushes arranged on the inner side wall of the protective baffle plate 11 are subjected to the air pressure discharged from the air blowing openings 17, so that the concomitant air blowing and dust removal functions in the moving process are realized, when the device is used and the teaching box body 1 is taken down from an adsorbed object, the sliding block 2 begins to reset due to the elastic action of the connecting spring 5, so as to drive the bunching wheel 9 to bunch the driving traction rope 10, the protective baffle plate 11 begins to be closed, the extrusion rod 14 pulls the extrusion block 18 to begin to perform the air suction action from the outside, in the inward closing process of the protective baffle plate 11, the antistatic dust removal fluff brush that protection shield 11 inside wall set up receives inlet scoop 16's suction effect to realized the accompanying nature dust absorption function when closed, because the inside dust absorption village bag that sets up of inlet scoop 16, 16 absorptive dusts of inlet scoop can not get into and cause blocking phenomenon in clean pipe 15, at above-mentioned in-process, utilize the elastic force effect of elastic telescopic rod 13, realized the dual accompanying nature cleaning function to the inside antistatic dust removal fluff brush of protection shield 11 at protection shield 11 closed and open in-process.
In conclusion, the invention realizes the bidirectional panel dust removal function before and after use and the protection function after the teaching panel is used through the magnetic force and the driving action of the bevel gear, and in addition, the double accompanying cleaning function of the antistatic dust removal fluff brush arranged on the inner side wall of the protection baffle plate 11 is realized in the closing and opening processes of the protection baffle plate 11 by utilizing the elastic action of the elastic telescopic rod 13.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The drawing device for mathematics statistics is characterized by comprising a teaching box body (1), a magnetic driving mechanism, a protection mechanism and a cleaning mechanism, wherein a carrying handle (19) is fixedly arranged on the upper side wall of the teaching box body (1);
the protection mechanism comprises a baffle base (12) fixedly installed on the side wall of the teaching box body (1), two protection baffles (11) capable of protecting the teaching blackboard are symmetrically installed on the inner side wall of the baffle base (12) along the central axis of the baffle base (12), the two protection baffles (11) are in sliding connection with the baffle base (12), an elastic telescopic rod (13) is fixedly installed between the lower side wall of each protection baffle (11) and the side wall of the baffle base (12), the inner side walls of the two protection baffles (11) are fixedly connected with a driving traction rope (10), and the other end of the driving traction rope (10) is fixedly connected with a magnetic driving mechanism;
the cleaning mechanism comprises an extrusion rod (14) fixedly mounted on the upper side wall of the protective baffle (11), the extrusion rod (14) is in sliding connection with the inner side wall of the teaching box body (1), the side wall of the extrusion rod (14) is fixedly connected with an extrusion block (18), a cleaning pipe (15) is fixedly mounted on the side wall of the teaching box body (1), the inner side wall of the cleaning pipe (15) is in sliding connection with the outer side wall of the extrusion block (18), an air suction opening (16) for dust collection and cleaning is fixedly formed in the side wall of the cleaning pipe (15), and an air blowing opening (17) for dust blowing and cleaning is fixedly formed in the side wall of the cleaning pipe (15);
the magnetic driving mechanism comprises a sliding block (2) which is in sliding connection with the side wall of the teaching box body (1), the outer side wall of the sliding block (2) is fixedly connected with a powerful magnetic block (3), the inner side wall of the teaching box body (1) is rotatably connected with a first bevel gear (6), the inner side wall of the first bevel gear (6) is in threaded connection with a threaded rotating rod (4), the threaded rotating rod (4) is fixedly connected with the powerful magnetic block (3), a connecting spring (5) is fixedly connected between the inner side wall of the teaching box body (1) and the sliding block (2), two rotating shafts (8) are symmetrically arranged on the inner side wall of the teaching box body (1) along the axis of the teaching box body (1), the two rotating shafts (8) are in rotating connection with the inner side wall of the teaching box body (1), and the side walls of the two rotating shafts (8) are fixedly connected with a second bevel gear (7), the second bevel gear (7) is meshed with the first bevel gear (6), the side wall of the rotating shaft (8) is fixedly connected with a wire bundling wheel (9), and the wire bundling wheel (9) is fixedly connected with the other end of the traction rope (10).
2. A drawing device for mathematics statistics as claimed in claim 1, characterized in that the inner side wall of said protective baffle (11) is fixedly equipped with a cleaning brush, said cleaning brush is a dustproof antistatic fur brush.
3. The drawing device for mathematics statistics as claimed in claim 1, characterized in that said teaching box (1) is made of light material as a whole, and said traction rope (10) is made of wear-resistant material.
4. The drawing device for mathematics statistics as claimed in claim 1, wherein the mouth end of the air suction opening (16) is fixedly provided with a one-way air inlet valve, the mouth end of the air blowing opening (17) is fixedly provided with a one-way air outlet valve, the inner side wall of the air suction opening (16) is fixedly provided with a dust collection and storage bag, and the side wall of the dust collection and storage bag adopts a small-hole high-density filter screen.
5. The mathematical statistic plotting device of claim 1, in which the connecting spring (5) is fitted around the outside wall of the threaded rod (4) without touching it.
6. The drawing device for mathematics statistics as claimed in claim 2, characterized in that, sliding connection is carried out between the lateral wall of screw bull stick (4) and teaching box (1), the lateral wall fixed mounting of screw bull stick (4) has limiting plate (20), limiting plate (20) side sets up for square structure, the junction of sliding block (2) and teaching box (1) is provided with the spacing buckle that can not take place the rotation when sliding block (2) slides.
7. The drawing device for mathematics statistics as claimed in claim 2, wherein the outer side wall of said powerful magnetic block (3) is slidably connected with the inner side wall of the teaching box (1), when said powerful magnetic block (3) is attracted to the outermost end, the side wall of said threaded rotating rod (4) will not be separated from the inner side wall of the teaching box (1), and said sliding block (2) is made of insulating material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110236418.2A CN112895766B (en) | 2021-03-03 | 2021-03-03 | Drawing device for mathematical statistics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110236418.2A CN112895766B (en) | 2021-03-03 | 2021-03-03 | Drawing device for mathematical statistics |
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| Publication Number | Publication Date |
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| CN112895766A CN112895766A (en) | 2021-06-04 |
| CN112895766B true CN112895766B (en) | 2022-07-19 |
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| CN202110236418.2A Active CN112895766B (en) | 2021-03-03 | 2021-03-03 | Drawing device for mathematical statistics |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5090743U (en) * | 1973-12-22 | 1975-07-31 | ||
| TWM524794U (en) * | 2016-03-21 | 2016-07-01 | Nat Univ Chin Yi Technology | Chalk dust isolation device |
| CN108312740A (en) * | 2018-01-22 | 2018-07-24 | 佛山杰致信息科技有限公司 | A kind of teaching intelligent blackboard |
| CN109064780A (en) * | 2018-08-28 | 2018-12-21 | 张德为 | A kind of teaching gives lessons and uses auxiliary teaching device |
| WO2019229279A1 (en) * | 2018-06-01 | 2019-12-05 | Universidad De Valladolid | System for improving air quality around a blackboard via localised extraction of contaminated air |
| CN211195607U (en) * | 2019-12-02 | 2020-08-07 | 武汉科技大学 | Automatic cleaning blackboard |
| CN211641642U (en) * | 2020-02-27 | 2020-10-09 | 成都航空职业技术学院 | Automatic cleaning dust-proof blackboard |
| CN112201122A (en) * | 2020-11-18 | 2021-01-08 | 河南应用技术职业学院 | Higher mathematical function teaching demonstration instrument |
| CN112309177A (en) * | 2020-11-02 | 2021-02-02 | 黄淮学院 | Teacher's oral education is with on-line teaching and learning auxiliary device |
-
2021
- 2021-03-03 CN CN202110236418.2A patent/CN112895766B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5090743U (en) * | 1973-12-22 | 1975-07-31 | ||
| TWM524794U (en) * | 2016-03-21 | 2016-07-01 | Nat Univ Chin Yi Technology | Chalk dust isolation device |
| CN108312740A (en) * | 2018-01-22 | 2018-07-24 | 佛山杰致信息科技有限公司 | A kind of teaching intelligent blackboard |
| WO2019229279A1 (en) * | 2018-06-01 | 2019-12-05 | Universidad De Valladolid | System for improving air quality around a blackboard via localised extraction of contaminated air |
| CN109064780A (en) * | 2018-08-28 | 2018-12-21 | 张德为 | A kind of teaching gives lessons and uses auxiliary teaching device |
| CN211195607U (en) * | 2019-12-02 | 2020-08-07 | 武汉科技大学 | Automatic cleaning blackboard |
| CN211641642U (en) * | 2020-02-27 | 2020-10-09 | 成都航空职业技术学院 | Automatic cleaning dust-proof blackboard |
| CN112309177A (en) * | 2020-11-02 | 2021-02-02 | 黄淮学院 | Teacher's oral education is with on-line teaching and learning auxiliary device |
| CN112201122A (en) * | 2020-11-18 | 2021-01-08 | 河南应用技术职业学院 | Higher mathematical function teaching demonstration instrument |
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| CN112895766A (en) | 2021-06-04 |
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