CN205997606U - Have from the multimedia blackboard for wiping function - Google Patents
Have from the multimedia blackboard for wiping function Download PDFInfo
- Publication number
- CN205997606U CN205997606U CN201620581163.8U CN201620581163U CN205997606U CN 205997606 U CN205997606 U CN 205997606U CN 201620581163 U CN201620581163 U CN 201620581163U CN 205997606 U CN205997606 U CN 205997606U
- Authority
- CN
- China
- Prior art keywords
- blackboard
- electric eraser
- eraser
- multimedia blackboard
- multimedia
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000001681 protective effect Effects 0.000 claims description 10
- 239000011159 matrix material Substances 0.000 claims 4
- 239000000843 powder Substances 0.000 abstract description 13
- 239000000428 dust Substances 0.000 abstract description 10
- 238000010521 absorption reaction Methods 0.000 abstract description 7
- 239000000758 substrate Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 230000036541 health Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 241000255969 Pieris brassicae Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 210000001508 eye Anatomy 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 210000003491 skin Anatomy 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
本实用新型公开了一种具有自擦功能的多媒体黑板,包括多媒体黑板,多媒体黑板周边设有边框,两侧的边框内设有齿条,齿条之间设有活动轨道,活动轨道上设有套筒,套筒下端设有电动板擦;齿条与齿条箱相连接,齿条箱与驱动电机相连接;边框两端设有粉笔盒、活动板擦和控制面板,控制面板与驱动电机相连接。本实用新型通过卡接在活动轨道上的电动板擦对多媒体黑板上的板书进行擦拭,并利用其内的微电机实现粉末的吸收,通过齿条带动活动轨道上下移动,电动板擦通过套筒卡接在活动轨道上,实现电动板擦的左右移动,同时方便对电动板擦的拆卸和粉末的处理,增加了电动板擦的擦拭能力;利用电动板擦自动吸纳粉尘,减少了劳动强度和粉尘对师生身体的影响。
The utility model discloses a multimedia blackboard with self-erasing function, which comprises a multimedia blackboard, a frame is arranged around the multimedia blackboard, racks are arranged in the frames on both sides, movable tracks are arranged between the racks, and movable rails are arranged on the movable rails. Sleeve, the lower end of the sleeve is equipped with an electric eraser; the rack is connected with the rack box, and the rack box is connected with the drive motor; the two ends of the frame are provided with a chalk box, movable eraser and control panel, and the control panel is connected with the drive motor . The utility model wipes the blackboard writing on the multimedia blackboard through the electric eraser clamped on the movable track, and uses the micro-motor inside to realize the powder absorption, drives the movable track to move up and down through the rack, and the electric eraser is clamped through the sleeve On the movable track, the left and right movement of the electric eraser is realized, and at the same time, the disassembly of the electric eraser and the processing of the powder are convenient, which increases the wiping ability of the electric eraser; the use of the electric eraser automatically absorbs dust, which reduces the labor intensity and dust on teachers and students. influences.
Description
技术领域technical field
本实用新型涉及黑板的技术领域,具体涉及一种具有自擦功能的多媒体黑板。The utility model relates to the technical field of blackboards, in particular to a multimedia blackboard with self-wiping function.
背景技术Background technique
黑板是最普遍的课堂教学用具,一般都固定在教室座位正前方墙面的中央。随着多媒体技术及设备的普及,多媒体教学得到了广大教师和学生的喜爱,但是目前在各类教学中常用的黑板板书采用粉笔书写,大都存在粉尘污染问题,严重影响到师生的身体健康,尤其在中小学校,教室中的黑板和粉笔是学生、老师每天都会接触到的东西,特别是擦板书的时候,一大片白色的粉尘漫天飞舞,大家不可避免地都吸入了一些粉笔灰,前排同学、老师、值日生吸的更多,天长日久,容易对中小学生和老师的肺部、上呼吸道、眼睛、皮肤、耳朵等多处器官造成危害,还会诱发其它疾病,污染环境。为了解决粉尘污染问题及为了减轻教学过程中老师频繁擦拭黑板的劳动强度,人们再多媒体黑板上设计出了许多能自动吸尘的手动或电动黑板擦,因其结构的原因,不仅吸尘效果并不理想,而且擦拭颇为费时费力。The blackboard is the most common classroom teaching tool, and is generally fixed in the center of the wall directly in front of the classroom seat. With the popularization of multimedia technology and equipment, multimedia teaching has been loved by teachers and students. However, the blackboard writing commonly used in various teaching is written with chalk. Most of them have dust pollution problems, which seriously affect the health of teachers and students. Especially in primary and middle schools, the blackboard and chalk in the classroom are things that students and teachers come into contact with every day, especially when wiping the blackboard, a large white dust is flying all over the sky, and everyone inevitably inhales some chalk dust. Classmates, teachers, and on-duty students smoke more. Over time, it is easy to cause harm to the lungs, upper respiratory tract, eyes, skin, ears and other organs of primary and middle school students and teachers. It can also induce other diseases and pollute the environment. In order to solve the problem of dust pollution and to reduce the labor intensity of teachers frequently wiping the blackboard during the teaching process, people have designed many manual or electric blackboard erasers that can automatically vacuum dust on the multimedia blackboard. Not ideal, and it takes a lot of time and effort to wipe.
实用新型内容Utility model content
为了解决上述技术问题,本实用新型提供了一种具有自擦功能的多媒体黑板,可以自动实现对多媒体黑板板书的擦除,自动吸纳粉尘,减少了劳动强度和对师生身体的影响。In order to solve the above technical problems, the utility model provides a multimedia blackboard with self-erasing function, which can automatically erase the writing on the multimedia blackboard, absorb dust automatically, and reduce the labor intensity and the impact on the health of teachers and students.
为了达到上述目的,本实用新型的技术方案是:一种具有自擦功能的多媒体黑板,包括多媒体黑板,多媒体黑板周边设有边框,两侧的边框内设有齿条,齿条之间设有活动轨道,活动轨道上设有套筒,套筒下端设有电动板擦;所述齿条与齿条箱相连接,齿条箱与驱动电机相连接;所述边框两端设有粉笔盒、活动板擦和控制面板,控制面板与驱动电机相连接。In order to achieve the above purpose, the technical solution of the present invention is: a multimedia blackboard with self-wiping function, including a multimedia blackboard, a frame is arranged around the multimedia blackboard, racks are arranged in the frames on both sides, and racks are arranged between the racks. The movable track is provided with a sleeve, and the lower end of the sleeve is provided with an electric eraser; the rack is connected with the rack box, and the rack box is connected with the drive motor; chalk boxes, movable The blackboard eraser and the control panel are connected with the drive motor.
所述电动板擦内设有微电机、无线接收器和PLC控制器,无线接收器与PLC控制器相连接,PLC控制器与微电机相连接,微电机与风机相连接,电动板擦上设有出风口;所述电动板擦上设有卡接部、基体和通孔,电动板擦通过卡接部与套筒相连接。The electric eraser is provided with a micro-motor, a wireless receiver and a PLC controller, the wireless receiver is connected with the PLC controller, the PLC controller is connected with the micro-motor, the micro-motor is connected with the fan, and the electric eraser is provided with an outlet. A tuyere; the electric eraser is provided with a clamping part, a base and a through hole, and the electric eraser is connected to the sleeve through the clamping part.
所述通孔设置在基体之间。The through holes are arranged between the substrates.
所述电动板擦上设有保护罩,保护罩围绕在基体外侧,保护罩的高度低于基体的高度。A protective cover is arranged on the electric eraser, the protective cover surrounds the outer side of the base body, and the height of the protective cover is lower than that of the base body.
所述控制面板上设有正转按钮、反转按钮和微电机控制按钮,正转按钮、反转按钮与驱动电机相连接,微电机控制按钮和与无线接收器相匹配的无线发射器相连接。The control panel is provided with a forward rotation button, a reverse rotation button and a micro-motor control button, the forward rotation button and the reverse rotation button are connected with the drive motor, and the micro-motor control button is connected with a wireless transmitter matched with the wireless receiver .
本实用新型通过卡接在活动轨道上的电动板擦对多媒体黑板上的板书进行擦拭,并利用其内的微电机实现粉末的吸收,通过多媒体黑板两侧设置的齿条带动活动轨道上下移动,实现电动板擦对多媒体黑板上下的擦拭,电动板擦通过套筒卡接在活动轨道上,方便电动板擦的左右移动,同时方便对电动板擦的拆卸和粉末的处理,增加了电动板擦的擦拭能力;本实用新型利用电动板擦自动吸纳粉尘,减少了劳动强度和粉尘对师生身体的影响。The utility model wipes the blackboard writing on the multimedia blackboard through the electric eraser clamped on the movable track, and uses the micro-motor inside to realize the powder absorption, and drives the movable track to move up and down through the racks arranged on both sides of the multimedia blackboard to realize The electric eraser wipes the upper and lower sides of the multimedia blackboard. The electric eraser is clamped on the movable track through the sleeve, which facilitates the left and right movement of the electric eraser. The new type uses the electric eraser to automatically absorb dust, which reduces labor intensity and the impact of dust on the bodies of teachers and students.
附图说明Description of drawings
为了更清楚地说明本实用新型实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本实用新型的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.
图1为本实用新型的结构示意图。Fig. 1 is the structural representation of the utility model.
图2为本实用新型电动板擦的结构示意图。Fig. 2 is a schematic structural view of the utility model electric eraser.
图3为本实用新型图2的俯视图。Fig. 3 is a top view of Fig. 2 of the present utility model.
图中,1为多媒体黑板,2为边框,3为活动轨道,4为齿条,5为电动板擦,6为套筒,7为驱动电机,8为齿轮箱,9为活动板擦,10为粉笔盒,11为控制面板,12为保护罩,13为擦体,14为微电机,15为通孔,16为正转按钮,17为反转按钮,18为卡接部,19为无线接收器,20为PLC控制器,21为微电机控制按钮,22为风机,23为出风口。In the figure, 1 is the multimedia blackboard, 2 is the frame, 3 is the movable track, 4 is the rack, 5 is the electric eraser, 6 is the sleeve, 7 is the driving motor, 8 is the gear box, 9 is the movable eraser, and 10 is the chalk Box, 11 is the control panel, 12 is the protective cover, 13 is the wiper, 14 is the micro motor, 15 is the through hole, 16 is the forward rotation button, 17 is the reverse rotation button, 18 is the clamping part, 19 is the wireless receiver , 20 is a PLC controller, 21 is a micro-motor control button, 22 is a fan, and 23 is an air outlet.
具体实施方式detailed description
下面将结合本实用新型实施例中的附图,对本实用新型实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本实用新型一部分实施例,而不是全部的实施例。基于本实用新型中的实施例,本领域普通技术人员在没有付出创造性劳动前提下所获得的所有其他实施例,都属于本实用新型保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.
如图1、图2和图3所示,一种具有自擦功能的多媒体黑板,包括多媒体黑板1,多媒体黑板1周边设有边框2,边框2分布在多媒体黑板1的上下左右,用于对多媒体黑板1进行固定。两侧的边框2内设有齿条4,齿条4之间设有活动轨道3,活动轨道3上设有套筒6,套筒6下端设有电动板擦5,电动板擦5可以随着套筒6在活动轨道3上左右移动。电动板擦5的长度为活动轨道3的一半或更短,可以实现对多媒体黑板1的擦拭更彻底。齿条4与齿条箱8相连接,齿条箱8与驱动电机7相连接,齿条箱8在驱动电机7的带动下进行转动,带动齿条4转动,从而带动活动轨道3相对于多媒体黑板1上下运动。As shown in Fig. 1, Fig. 2 and Fig. 3, a kind of multimedia blackboard with self-erasing function comprises multimedia blackboard 1, and multimedia blackboard 1 periphery is provided with frame 2, and frame 2 is distributed in multimedia blackboard 1 up and down, left and right, is used for The multimedia blackboard 1 is fixed. The frame 2 on both sides is provided with tooth bar 4, is provided with movable track 3 between tooth bar 4, is provided with sleeve 6 on movable track 3, is provided with electric eraser 5 at the lower end of sleeve 6, and electric eraser 5 can follow sleeve The cylinder 6 moves left and right on the movable track 3 . The length of the electric blackboard eraser 5 is half or shorter than the movable track 3, which can realize more thorough wiping of the multimedia blackboard 1. The rack 4 is connected with the rack box 8, and the rack box 8 is connected with the drive motor 7. The rack box 8 rotates under the drive of the drive motor 7, and drives the rack 4 to rotate, thereby driving the movable track 3 relative to the multimedia Blackboard 1 moves up and down.
边框2一端设有粉笔盒10和活动板擦9粉笔盒10可以用于盛放粉笔,活动板擦9可以实现对多媒体黑板1上的板书进行局部修改。边框2另一端设有控制面板11,控制面板11与驱动电机7相连接,用于控制驱动电机7的转动。控制面板11上设有正转按钮16和反转按钮17,正转按钮16和反转按钮17分别与驱动电机7相连接,分别控制驱动电机7正转和反转,实现齿条4的正转和反转,从而使活动轨道3向下或向上运动,从而带动电动板擦5上下运动,实现对多媒体黑板1上板书的擦拭。One end of the frame 2 is provided with a chalk box 10 and a movable eraser 9. The chalk box 10 can be used to hold chalk, and the movable eraser 9 can realize partial modification of the blackboard writing on the multimedia blackboard 1. The other end of the frame 2 is provided with a control panel 11 , and the control panel 11 is connected with the drive motor 7 for controlling the rotation of the drive motor 7 . The control panel 11 is provided with a forward rotation button 16 and a reverse rotation button 17. The forward rotation button 16 and the reverse rotation button 17 are respectively connected with the drive motor 7 to control the forward rotation and reverse rotation of the drive motor 7 respectively to realize the forward rotation of the rack 4. Turn and reverse, so that the movable track 3 moves downward or upward, thereby driving the electric blackboard eraser 5 to move up and down, so as to realize the wiping of writing on the blackboard on the multimedia blackboard 1 .
电动板擦5内设有微电机14、无线接收器19和PLC控制器20,电动板擦5上设有卡接部18、基体13和通孔15。微电机14与风机22相连接,电动板擦5上设有出风口23,出风口23不宜过大,出风口23设置在电动板擦5的上部或接近卡接部18,与通孔15形成对流通道,实现对粉末的吸收。基体13实现对多媒体黑板的擦拭,微电机14带动风机22转动,在风机22的带动下被擦拭的粉末从通孔15进入电动板擦5中,实现对擦拭粉末的吸收。微电机14与PLC控制器20相连接,PLC控制器20与无线接收器19相连接。控制面板11上设有微电机控制按钮21,微电机控制按钮21和与无线接收器19相匹配的无线发射器相连接。微电机控制按钮21通过无线接收器19和无线发射器实现对微电机14的启动或关闭的控制,PLC控制器20处理无线接收器19接收的控制信号,启动微电机14,实现是对电动板擦5粉末的吸收。无线接收器19和PLC控制器20外端可以设有壳体,防止粉末对它们功能的影响。电动板擦5通过卡接部18与套筒6相连接,方便实现电动板擦5的安装和拆卸,实现对电动板擦5内粉末的清理。The electric eraser 5 is provided with a micro-motor 14 , a wireless receiver 19 and a PLC controller 20 , and the electric eraser 5 is provided with a clamping portion 18 , a substrate 13 and a through hole 15 . Micromotor 14 is connected with fan 22, and electric eraser 5 is provided with air outlet 23, and air outlet 23 should not be too big, and air outlet 23 is arranged on the upper part of electric eraser 5 or near clamping part 18, forms convection with through hole 15 Road, to achieve the absorption of powder. The substrate 13 realizes the wiping of the multimedia blackboard, and the micro-motor 14 drives the fan 22 to rotate, and the powder wiped under the drive of the fan 22 enters the electric eraser 5 from the through hole 15 to realize the absorption of the wiping powder. The micro motor 14 is connected with a PLC controller 20 , and the PLC controller 20 is connected with a wireless receiver 19 . The control panel 11 is provided with a micro-motor control button 21 , and the micro-motor control button 21 is connected with a wireless transmitter matched with the wireless receiver 19 . The micro-motor control button 21 realizes the control of starting or closing the micro-motor 14 through the wireless receiver 19 and the wireless transmitter. 5 powder for absorption. The outer ends of the wireless receiver 19 and the PLC controller 20 can be provided with housings to prevent powder from affecting their functions. The electric eraser 5 is connected with the sleeve 6 through the clamping part 18, which facilitates the installation and disassembly of the electric eraser 5, and realizes the cleaning of the powder in the electric eraser 5.
优选地,通孔15设置在基体13之间,基体13由若干个擦条组成,基体13之间的通孔15设有若干个,微电机14带动风机22转动,可以通过通孔15实现对被擦拭的粉末的完全吸收。Preferably, the through holes 15 are arranged between the substrates 13, the substrates 13 are composed of several wipers, the through holes 15 between the substrates 13 are provided with several, the micro motor 14 drives the fan 22 to rotate, and the through holes 15 can be used to realize the Complete absorption of wiped powder.
优选地,电动板擦5上设有保护罩12,保护罩12围绕在基体13外侧,保护罩12的高度低于基体13的高度,用于防止粉末飞舞,使粉末通过通孔15进入电动板擦5的内部。Preferably, the electric eraser 5 is provided with a protective cover 12, the protective cover 12 surrounds the outside of the base 13, the height of the protective cover 12 is lower than the height of the base 13, and is used to prevent the powder from flying, so that the powder enters the electric eraser 5 through the through hole 15 internal.
工作过程:按动正转按钮16或反转按钮17,使活动轨道3相对于多媒体黑板1向上或向下运动,实现对多媒体黑板1的擦拭,同时通过微电机控制按钮21打开电动板擦5的微电机14,风机22转动形成对流实现粉末的吸收;当一部分擦拭完毕后,移动套筒6使电动板擦5相对于活动轨道3移动,重复上述动作实现多媒体黑板1另一部分的擦拭。Working process: press the forward rotation button 16 or the reverse rotation button 17 to make the movable track 3 move up or down relative to the multimedia blackboard 1 to wipe the multimedia blackboard 1, and at the same time turn on the electric eraser 5 through the micro-motor control button 21 Micro motor 14, blower fan 22 rotate to form convection to realize the absorption of powder; after a part of wiping is finished, moving sleeve 6 makes electric eraser 5 move relative to movable track 3, repeats above-mentioned action and realizes the wiping of another part of multimedia blackboard 1.
以上所述,仅为本实用新型较佳的具体实施方式,但本实用新型的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本实用新型揭露的技术范围内,可轻易想到的变化或替换,都应涵盖在本实用新型的保护范围之内。The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any person familiar with the technical field can easily think of All changes or replacements should fall within the protection scope of the present utility model.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620581163.8U CN205997606U (en) | 2016-06-16 | 2016-06-16 | Have from the multimedia blackboard for wiping function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620581163.8U CN205997606U (en) | 2016-06-16 | 2016-06-16 | Have from the multimedia blackboard for wiping function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205997606U true CN205997606U (en) | 2017-03-08 |
Family
ID=58205158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620581163.8U Expired - Fee Related CN205997606U (en) | 2016-06-16 | 2016-06-16 | Have from the multimedia blackboard for wiping function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205997606U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106881981A (en) * | 2017-03-21 | 2017-06-23 | 张凡 | A kind of blackboard auto-erasing device |
| CN107909888A (en) * | 2017-11-15 | 2018-04-13 | 常州信息职业技术学院 | A kind of board of education for environment Public Design |
| CN110525085A (en) * | 2018-05-23 | 2019-12-03 | 刘志豪 | A kind of Multifunctional commerce blank |
-
2016
- 2016-06-16 CN CN201620581163.8U patent/CN205997606U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106881981A (en) * | 2017-03-21 | 2017-06-23 | 张凡 | A kind of blackboard auto-erasing device |
| CN107909888A (en) * | 2017-11-15 | 2018-04-13 | 常州信息职业技术学院 | A kind of board of education for environment Public Design |
| CN110525085A (en) * | 2018-05-23 | 2019-12-03 | 刘志豪 | A kind of Multifunctional commerce blank |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103950320B (en) | A kind of rolling type white board | |
| CN207156780U (en) | A kind of Chinese literature blackboard for teaching | |
| CN207984401U (en) | A kind of teaching aid has the blackboard from dust-erasing function | |
| CN204936622U (en) | A kind of teaching aid with auto-erasing and dust exhaust apparatus | |
| CN206653823U (en) | Electronic blackboard cleaning device | |
| CN205022250U (en) | Automatic blackboard brush | |
| CN201231625Y (en) | Blackboard capable of automatic clearing chalk dust | |
| CN103950329A (en) | Electric blackboard eraser device | |
| CN107053915A (en) | A kind of education blackboard cleaning device | |
| CN204605298U (en) | The two-sided use blackboard of dust-collecting type is wiped in a kind of | |
| CN101367308A (en) | Multifunctional environment friendly blackboard | |
| CN201201453Y (en) | Full automatic blackboard eraser | |
| CN206826259U (en) | A kind of new type blackboard | |
| CN206086131U (en) | A new type of automatic blackboard eraser | |
| CN204749661U (en) | Automatic change clean environmental protection dust absorption blackboard | |
| CN204414960U (en) | A kind of multifunctional blackboard eraser | |
| CN203185942U (en) | Automatic blackboard erasing device | |
| CN203126248U (en) | Electric blackboard | |
| CN105856927A (en) | Dust collection erasing board and using method | |
| CN207657477U (en) | A kind of primary school math teaching blackboard | |
| CN201580171U (en) | Automatic blackboard eraser | |
| CN105059018A (en) | Electric self-cleaning teaching blackboard | |
| CN201015940Y (en) | Automatic dust-absorption blackboard eraser machine | |
| CN106427324A (en) | Blackboard with automatic dust removing function | |
| CN204870245U (en) | Teaching is with chalkboard eraser that can inhale chalk dust automatically |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170308 Termination date: 20190616 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |