CN113829782A - Plug-type automatically cleaning dustless teaching blackboard - Google Patents
Plug-type automatically cleaning dustless teaching blackboard Download PDFInfo
- Publication number
- CN113829782A CN113829782A CN202111301559.4A CN202111301559A CN113829782A CN 113829782 A CN113829782 A CN 113829782A CN 202111301559 A CN202111301559 A CN 202111301559A CN 113829782 A CN113829782 A CN 113829782A
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- China
- Prior art keywords
- dust
- blackboard
- main body
- free
- plate
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- 238000004140 cleaning Methods 0.000 title claims abstract description 41
- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 244000309464 bull Species 0.000 claims description 4
- 230000037431 insertion Effects 0.000 description 10
- 238000003780 insertion Methods 0.000 description 10
- 230000007306 turnover Effects 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000005337 ground glass Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L1/00—Repeatedly-usable boards or tablets for writing or drawing
- B43L1/04—Blackboards
-
- 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
Abstract
The invention discloses a push-pull self-cleaning dust-free teaching blackboard, which relates to the technical field of blackboards and comprises the following components: a main body; a first dust-free blackboard disposed inside one side of the main body; the second dust-free blackboard is positioned on one side of the first dust-free blackboard and is positioned inside the main body. According to the invention, the limiting mechanism is arranged, the mechanism can realize limiting push-pull of the dust-free blackboard, the sliding pressure plate is enabled to extrude the two overturning clamping plates by pushing the pressing plate, at the moment, the overturning clamping plates overturn through the fixed rotating rod and twist the torsion spring, then the first dust-free blackboard and the second dust-free blackboard are pushed to be separated from each other, at the moment, the two limiting sliding plates are driven by the dust-free blackboard to slide in a limiting way in the main body, meanwhile, a plurality of rollers assist the limiting sliding plates to slide through the rotating shafts, and then the first return spring pushes the pin block to be inserted into the main body through pressure rebound, so that the dust-free blackboard is conveniently moved and fixed.
Description
Technical Field
The invention relates to the technical field of blackboards, in particular to a push-pull self-cleaning dust-free teaching blackboard.
Background
The teaching aid is a general name of various appliances used by students for enabling the students to understand teaching contents visually and vividly and appliances used by teachers during teaching, a blackboard is a common tool in the teaching aid, the blackboard is a plane tool used for repeated writing and is mostly used in the aspect of teaching, the board surface of the traditional blackboard is generally ground glass or a composite material board, the traditional blackboard is used for writing on the board surface by chalk, and the characters are erased by a blackboard eraser after writing.
The special electronic pen for the existing dust-free blackboard can be used for painting, and the chalk is not required to be used for painting, so that the harm of dust is greatly avoided, the convenient fixing can not be carried out when the blackboard is pushed and pulled, and the dust can not be conveniently cleaned on the surface of the blackboard due to the fact that the inside of the blackboard contains electronic elements, and the use is not facilitated.
Disclosure of Invention
The invention aims to: in order to solve the problems that the blackboard cannot be fixed in a sliding mode and the surface of the blackboard cannot be cleaned conveniently, a push-pull self-cleaning dust-free teaching blackboard is provided.
In order to achieve the purpose, the invention provides the following technical scheme: a push-pull self-cleaning dust-free teaching blackboard, comprising:
a main body;
a first dust-free blackboard disposed inside one side of the main body;
the second dust-free blackboard is positioned on one side of the first dust-free blackboard and is positioned in the main body;
the limiting mechanisms are arranged at the upper ends and the lower ends of the first dust-free blackboard and the second dust-free blackboard, are sleeved with the main body and are used for limiting and fixing the first dust-free blackboard and the second dust-free blackboard;
the cleaning mechanisms are respectively fixed on two sides of one end of the main body, are respectively positioned at one ends of the first dust-free blackboard and the second dust-free blackboard, and are used for conveniently cleaning the surfaces of the first dust-free blackboard and the second dust-free blackboard.
As a still further scheme of the invention: the limiting mechanism comprises limiting sliding plates, rolling wheels, a pressing plate, a sliding pressing plate, a first reset spring, pin blocks, a fixed rotating rod, a torsion spring and turnover clamping plates, wherein the two limiting sliding plates are respectively fixed at the top ends of a first dust-free blackboard and a second dust-free blackboard and are mutually sleeved with a main body, a plurality of rolling wheels are uniformly distributed at the two ends of the limiting sliding plates, the two pin blocks are respectively arranged at the bottom ends of one sides of the first dust-free blackboard and the second dust-free blackboard, which are far away from each other, and just reach the inside of the main body, the first reset spring is positioned on the upper surfaces of the pin blocks, the two turnover clamping plates are respectively arranged at the bottom ends of one sides of the first dust-free blackboard and the second dust-free blackboard, which are far away from the pin blocks, and penetrate through the inside of the main body, the fixed rotating rod is fixed at one end of the turnover clamping plates, and the other end of the turnover clamping plates is rotatably connected with the first dust-free blackboard and the second dust-free blackboard, the torsion spring is located one side top of upset cardboard, and cup joints each other with fixed bull stick, the sliding pressure board is located the lower surface of upset cardboard, and cup joints each other with the main part, press the bottom at the sliding pressure board, and run through to the bottom outer wall of main part.
As a still further scheme of the invention: clean mechanism includes fixed plate, clean picture peg, spacing picture peg, fixed fixture block, second reset spring and presses the sliding shaft, the fixed plate is fixed in the one end both sides of main part, and is located the one end of first dustless blackboard, the dustless blackboard of second respectively, spacing picture peg is located the one end that the main part was kept away from to the fixed plate, and runs through the other end to the fixed plate, the both sides middle-end at spacing picture peg is fixed to clean picture peg, and cup joints each other with the fixed plate, press the sliding shaft to be located the one end that the main part was kept away from to clean picture peg, and run through the inside to clean picture peg, fixed fixture block fixes the one end of pressing the sliding shaft, and runs through the inside of clean picture peg to fixed plate, second reset spring is located the lower surface of fixed fixture block.
As a still further scheme of the invention: the limiting sliding plate is rotatably connected with the idler wheels through a rotating shaft, and limiting sliding grooves matched with the outer wall of the main body are formed in the positions where the main body is connected with the limiting sliding plate and the idler wheels.
As a still further scheme of the invention: the main part is provided with the fixed slot who matches rather than the outer wall mutually with the position department that meets of round pin piece, the main part is provided with the promotion spout rather than the outer wall mutually matches with the position department that meets of pressing the clamp plate, sliding pressure plate.
As a still further scheme of the invention: the main part is provided with the upset draw-in groove rather than the outer wall and matches each other with the position department that connects of upset cardboard, the position department that connects of upset cardboard and torsion spring is provided with rather than the fixed groove of turning round of outer wall and matching each other.
As a still further scheme of the invention: the fixed plate is provided with the spacing slot that matches each other rather than the outer wall with clean picture peg, spacing picture peg department of meeting, clean picture peg and fixed fixture block, the department of meeting of pressing the sliding shaft is provided with the lift spout that matches each other rather than the outer wall, spacing picture peg and first dustless blackboard, the dustless blackboard department of meeting of second are provided with clean cushion.
Compared with the prior art, the invention has the beneficial effects that:
1. the mechanism can realize the limiting push-pull of the dust-free blackboard by arranging the limiting mechanism, the sliding pressure plate is enabled to extrude the two overturning clamping plates by pushing the pressing plate, the overturning clamping plates are overturned by the fixed rotating rod at the moment and are twisted to the torsion spring, then the first dust-free blackboard and the second dust-free blackboard are pushed to be separated from each other, at the moment, the two limiting sliding plates are driven by the dust-free blackboard to slide in a limiting way in the main body, meanwhile, a plurality of rollers assist the sliding of the limiting sliding plates through rotating shafts, and then the first reset spring rebounds by being pressed to push the pin block to be inserted into the main body, so that the dust-free blackboard is conveniently moved and fixed;
2. through setting up clean mechanism, this mechanism can realize the convenient clearance to dustless blackboard, drive through spacing picture peg makes the inside of clean picture peg synchronous insertion fixed plate, fixed fixture block is under the extrusion of fixed plate this moment, get into the inside of clean picture peg, and drive and press the sliding shaft to the extrusion of second reset spring, then second reset spring is through the pressurized bounce-back, promote the inside of fixed fixture block card income fixed plate, when dustless blackboard slides in the inside of main part, spacing picture peg is cleaned its surface through clean cushion this moment, thereby realize the convenient clearance to dustless blackboard surface.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of a spacing mechanism and a cleaning mechanism of the present invention;
FIG. 3 is an enlarged view of a portion of the present invention at A;
FIG. 4 is an enlarged view of a portion of the present invention at B;
fig. 5 is a partial enlarged view of the present invention at C.
In the figure: 1. a main body; 2. a limiting mechanism; 201. a limiting sliding plate; 202. a roller; 203. a pressing plate; 204. a sliding platen; 205. a first return spring; 206. a pin block; 207. fixing the rotating rod; 208. a torsion spring; 209. turning over the clamping plate; 3. a cleaning mechanism; 301. a fixing plate; 302. cleaning the plug board; 303. a limiting inserting plate; 304. fixing the fixture block; 305. a second return spring; 306. pressing the sliding shaft; 4. a first dust-free blackboard; 5. a second dust-free blackboard.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 5, in an embodiment of the present invention, a push-pull self-cleaning dust-free teaching blackboard includes:
a main body 1;
a first dust-free blackboard 4 disposed inside one side of the main body 1;
a second dust-free blackboard 5 positioned at one side of the first dust-free blackboard 4 and positioned inside the main body 1;
the limiting mechanism 2 is arranged at the upper end and the lower end of the first dust-free blackboard 4 and the second dust-free blackboard 5, is sleeved with the main body 1 and is used for limiting and fixing the first dust-free blackboard 4 and the second dust-free blackboard 5;
the cleaning mechanisms 3 are respectively fixed on two sides of one end of the main body 1, are respectively positioned at one ends of the first dust-free blackboard 4 and the second dust-free blackboard 5, and are used for conveniently cleaning the surfaces of the first dust-free blackboard 4 and the second dust-free blackboard 5.
In this embodiment: make first dustless blackboard 4, the dustless blackboard 5 of second carry out spacing slip in the inside of main part 1 through stop gear 2, clear up the surface of first dustless blackboard 4, the dustless blackboard 5 of second through clean mechanism 3 simultaneously, be convenient for maintain the cleanness on first dustless blackboard 4, the dustless blackboard 5 surface of second.
Please refer to fig. 1-4, the limiting mechanism 2 includes a limiting slide plate 201, rollers 202, a pressing plate 203, a sliding pressing plate 204, a first return spring 205, a pin block 206, a fixed rotating rod 207, a torsion spring 208 and a turning clamp plate 209, the two limiting slide plates 201 are respectively fixed on the top ends of the first and second dust- free blackboards 4 and 5 and are mutually sleeved with the main body 1, the rollers 202 are uniformly distributed on the two ends of the limiting slide plate 201, the two pin blocks 206 are respectively arranged on the bottom ends of the sides of the first and second dust- free blackboards 4 and 5 far away from each other and just reach the inside of the main body 1, the first return spring 205 is arranged on the upper surface of the pin block 206, the two turning clamp plates 209 are respectively arranged on the bottom ends of the sides of the first and second dust- free blackboards 4 and 5 far away from the pin block 206 and penetrate the inside of the main body 1, the fixed rotating rod 207 is fixed on one end of the turning clamp plate 209, the other end penetrating through the overturning clamping plate 209 is rotatably connected with the first dust-free blackboard 4 and the second dust-free blackboard 5, the torsion spring 208 is positioned at the top end of one side of the overturning clamping plate 209 and is mutually sleeved with the fixed rotating rod 207, the sliding pressing plate 204 is positioned at the lower surface of the overturning clamping plate 209 and is mutually sleeved with the main body 1, and the pressing plate 203 is fixed at the bottom end of the sliding pressing plate 204 and penetrates through the outer wall of the bottom end of the main body 1;
the limiting sliding plate 201 is rotatably connected with the plurality of rollers 202 through a rotating shaft, and a limiting sliding groove matched with the outer wall of the main body 1 is arranged at the connecting position of the main body 1 with the limiting sliding plate 201 and the rollers 202;
the main body 1 is provided with a fixed clamping groove matched with the outer wall of the main body 1 at the joint position of the pin block 206, and a pushing sliding groove matched with the outer wall of the main body 1 is arranged at the joint position of the main body 1, the pressing plate 203 and the sliding pressing plate 204.
The main part 1 is provided with the upset draw-in groove rather than the outer wall and match each other with upset cardboard 209 department of meeting, and upset cardboard 209 is provided with the fixed groove of turning round rather than the outer wall and match each other with torsion spring 208 department of meeting.
In this embodiment: make sliding pressure plate 204 extrude two upset cardboard 209 through promoting the pressure board 203, upset cardboard 209 overturns through fixed bull stick 207 this moment, and distort torsion spring 208, then promote first dustless blackboard 4, the dustless blackboard 5 alternate segregation of second, two spacing slides 201 are respectively at first dustless blackboard 4 this moment, the dustless blackboard 5 of second drives down, in the inside spacing slip of main part 1, a plurality of gyro wheels 202 are under the drive of spacing slide 201 through the pivot simultaneously, can be supplementary to the slip of spacing slide 201, then first reset spring 205 rebounds through the pressurized, promote the inside that round pin piece 206 inserted main part 1, be convenient for to first dustless blackboard 4, the dustless blackboard 5 of second carries out convenient fixing.
Please refer to fig. 1 to 5, the cleaning mechanism 3 includes a fixing plate 301, a cleaning insertion plate 302, a limiting insertion plate 303, a fixing block 304, a second return spring 305 and a pressing sliding shaft 306, the fixing plate 301 is fixed at two sides of one end of the main body 1 and respectively located at one end of the first dust-free blackboard 4 and one end of the second dust-free blackboard 5, the limiting insertion plate 303 is located at one end of the fixing plate 301 away from the main body 1 and penetrates through to the other end of the fixing plate 301, the cleaning insertion plate 302 is fixed at a middle end of two sides of the limiting insertion plate 303 and is sleeved with the fixing plate 301, the pressing sliding shaft 306 is located at one end of the cleaning insertion plate 302 away from the main body 1 and penetrates through to the inside of the cleaning insertion plate 302, the fixing block 304 is fixed at one end of the pressing sliding shaft 306 and penetrates through the cleaning insertion plate 302 to the inside of the fixing plate 301, and the second return spring 305 is located at a lower surface of the fixing block 304;
the connecting positions of the fixing plate 301, the cleaning inserting plate 302 and the limiting inserting plate 303 are provided with limiting slots matched with the outer walls of the fixing plate, the connecting positions of the cleaning inserting plate 302, the fixing clamping block 304 and the pressing sliding shaft 306 are provided with lifting sliding grooves matched with the outer walls of the fixing clamping block and the pressing sliding shaft, and the connecting positions of the limiting inserting plate 303, the first dust-free blackboard 4 and the second dust-free blackboard 5 are provided with cleaning soft pads.
In this embodiment: make clean picture peg 302 synchronous insertion fixed plate 301's inside through the drive of spacing picture peg 303, fixed fixture block 304 is under the extrusion of fixed plate 301 this moment, get into the inside of clean picture peg 302, and the drive is pressed smooth axle 306 and is extruded second reset spring 305, then second reset spring 305 is through the pressurized bounce-back, promote fixed fixture block 304 card and go into the inside of fixed plate 301, be convenient for carry out convenient fixing to spacing picture peg 303, when first dustless blackboard 4, the dustless blackboard 5 of second is when the inside of main part 1 slides, spacing picture peg 303 wipes its surface through clean cushion this moment, thereby realize the convenient clearance to dustless blackboard surface.
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 are equivalent to or changed within the technical scope of the present invention.
Claims (7)
1. The utility model provides a dustless teaching blackboard of plug-type automatically cleaning which characterized in that includes:
a main body (1);
a first dust-free blackboard (4) arranged inside one side of the main body (1);
the second dust-free blackboard (5) is positioned on one side of the first dust-free blackboard (4) and is positioned inside the main body (1);
the limiting mechanisms (2) are arranged at the upper ends and the lower ends of the first dust-free blackboard (4) and the second dust-free blackboard (5), are sleeved with the main body (1) and are used for limiting and fixing the first dust-free blackboard (4) and the second dust-free blackboard (5);
the cleaning mechanisms (3) are respectively fixed on two sides of one end of the main body (1), are respectively positioned at one ends of the first dust-free blackboard (4) and the second dust-free blackboard (5), and are used for conveniently cleaning the surfaces of the first dust-free blackboard (4) and the second dust-free blackboard (5).
2. A push-pull self-cleaning dust-free teaching blackboard according to claim 1, wherein the limiting mechanism (2) comprises a limiting sliding plate (201), rollers (202), a pressing plate (203), a sliding pressing plate (204), a first return spring (205), a pin block (206), a fixed rotating rod (207), a torsion spring (208) and a turning clamping plate (209), two limiting sliding plates (201) are respectively fixed on the top ends of the first dust-free blackboard (4) and the second dust-free blackboard (5) and are sleeved with the main body (1), a plurality of rollers (202) are uniformly distributed at two ends of the limiting sliding plate (201), two pin blocks (206) are respectively arranged at the bottom ends of one sides of the first dust-free blackboard (4) and the second dust-free blackboard (5) far away from each other and just inside the main body (1), the first return spring (205) is located on the upper surface of the pin block (206), two install respectively in the dustless blackboard of first dustless blackboard (4), the dustless blackboard of second (5) one side bottom of keeping away from round pin piece (206), and run through to the inside of main part (1), fixed bull stick (207) is fixed in the one end of upset cardboard (209), and runs through to the other end of upset cardboard (209) and first dustless blackboard (4), the dustless blackboard of second (5) rotate to be connected, torsion spring (208) are located one side top of upset cardboard (209), and cup joint each other with fixed bull stick (207), slide clamp (204) are located the lower surface of upset cardboard (209), and cup joint each other with main part (1), press clamp (203) to fix the bottom in slide clamp (204), and run through to the bottom outer wall of main part (1).
3. A push-pull self-cleaning dust-free teaching blackboard according to claim 1, wherein the cleaning mechanism (3) comprises a fixing plate (301), a cleaning inserting plate (302), a limiting inserting plate (303), a fixing clamping block (304), a second reset spring (305) and a pressing sliding shaft (306), the fixing plate (301) is fixed at two sides of one end of the main body (1) and respectively located at one end of the first dust-free blackboard (4) and the second dust-free blackboard (5), the limiting inserting plate (303) is located at one end of the fixing plate (301) far away from the main body (1) and penetrates through to the other end of the fixing plate (301), the cleaning inserting plate (302) is fixed at the middle end of two sides of the limiting inserting plate (303) and is mutually sleeved with the fixing plate (301), the pressing sliding shaft (306) is located at one end of the cleaning inserting plate (302) far away from the main body (1) and penetrates through to the inside of the cleaning inserting plate (302), the fixed clamping block (304) is fixed at one end of the pressing sliding shaft (306) and penetrates through the cleaning inserting plate (302) to the inside of the fixed plate (301), and the second return spring (305) is located on the lower surface of the fixed clamping block (304).
4. A push-pull self-cleaning dust-free teaching blackboard according to claim 2, wherein the limit sliding plate (201) is rotatably connected with the plurality of rollers (202) through a rotating shaft, and a limit chute matched with the outer wall of the main body (1) is arranged at the connecting position of the main body with the limit sliding plate (201) and the rollers (202).
5. A push-pull self-cleaning dust-free teaching blackboard according to claim 2, wherein the main body (1) is provided with a fixed slot matching with the outer wall of the main body at the position where the pin block (206) is connected, and the main body (1) is provided with a push chute matching with the outer wall of the main body at the position where the main body (1) is connected with the pressing plate (203) and the sliding pressing plate (204).
6. A push-pull self-cleaning dust-free teaching blackboard according to claim 3, wherein a turning slot matching with the outer wall of the turning catch plate (209) is provided at the position where the main body (1) is connected with the turning catch plate (209), and a fixing torsion slot matching with the outer wall of the turning catch plate (209) is provided at the position where the turning catch plate (209) is connected with the torsion spring (208).
7. A push-pull self-cleaning dust-free teaching blackboard according to claim 3, wherein the connecting position of the fixing plate (301) and the cleaning inserting plate (302) and the limiting inserting plate (303) is provided with a limiting slot matched with the outer wall of the fixing inserting plate, the connecting position of the cleaning inserting plate (302) and the fixing clamping block (304) and the pressing sliding shaft (306) is provided with a lifting sliding groove matched with the outer wall of the fixing inserting plate, and the connecting position of the limiting inserting plate (303) and the first dust-free blackboard (4) and the second dust-free blackboard (5) is provided with a cleaning soft cushion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111301559.4A CN113829782A (en) | 2021-11-04 | 2021-11-04 | Plug-type automatically cleaning dustless teaching blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111301559.4A CN113829782A (en) | 2021-11-04 | 2021-11-04 | Plug-type automatically cleaning dustless teaching blackboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113829782A true CN113829782A (en) | 2021-12-24 |
Family
ID=78967280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111301559.4A Pending CN113829782A (en) | 2021-11-04 | 2021-11-04 | Plug-type automatically cleaning dustless teaching blackboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113829782A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116373490A (en) * | 2023-04-20 | 2023-07-04 | 广东心里程教育集团有限公司 | Adjustable blackboard convenient to use |
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| CN103754025A (en) * | 2013-12-29 | 2014-04-30 | 刘艳丰 | Circulatory alternative cleaning-free dust-free blackboard |
| CN106346980A (en) * | 2016-08-29 | 2017-01-25 | 李晓丽 | Blackboard for teaching |
| CN110757996A (en) * | 2019-11-29 | 2020-02-07 | 济南市济阳区仁风镇中心小学 | Automatic blackboard wiping device capable of isolating dust |
| CN111070945A (en) * | 2019-11-07 | 2020-04-28 | 陆安兵 | Rail-changing type push-pull blackboard |
| CN111497496A (en) * | 2020-04-14 | 2020-08-07 | 安庆师范大学 | Chinese interactive teaching blackboard |
| CN212098157U (en) * | 2020-05-07 | 2020-12-08 | 广东科学技术职业学院 | Blackboard with dustproof push-and-pull structure |
-
2021
- 2021-11-04 CN CN202111301559.4A patent/CN113829782A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103754025A (en) * | 2013-12-29 | 2014-04-30 | 刘艳丰 | Circulatory alternative cleaning-free dust-free blackboard |
| CN106346980A (en) * | 2016-08-29 | 2017-01-25 | 李晓丽 | Blackboard for teaching |
| CN111070945A (en) * | 2019-11-07 | 2020-04-28 | 陆安兵 | Rail-changing type push-pull blackboard |
| CN110757996A (en) * | 2019-11-29 | 2020-02-07 | 济南市济阳区仁风镇中心小学 | Automatic blackboard wiping device capable of isolating dust |
| CN111497496A (en) * | 2020-04-14 | 2020-08-07 | 安庆师范大学 | Chinese interactive teaching blackboard |
| CN212098157U (en) * | 2020-05-07 | 2020-12-08 | 广东科学技术职业学院 | Blackboard with dustproof push-and-pull structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116373490A (en) * | 2023-04-20 | 2023-07-04 | 广东心里程教育集团有限公司 | Adjustable blackboard convenient to use |
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Application publication date: 20211224 |
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| RJ01 | Rejection of invention patent application after publication |