CN107443973A - A kind of double deck type interaction blackboard - Google Patents
A kind of double deck type interaction blackboard Download PDFInfo
- Publication number
- CN107443973A CN107443973A CN201710671620.1A CN201710671620A CN107443973A CN 107443973 A CN107443973 A CN 107443973A CN 201710671620 A CN201710671620 A CN 201710671620A CN 107443973 A CN107443973 A CN 107443973A
- Authority
- CN
- China
- Prior art keywords
- leading screw
- blackboard
- plate
- dedusting
- stepper motor
- 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.)
- Pending
Links
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
- B43L21/02—Blackboard or slate cleaning devices with means for absorbing the chalk dust
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B5/00—Electrically-operated educational appliances
- G09B5/02—Electrically-operated educational appliances with visual presentation of the material to be studied, e.g. using film strip
Landscapes
- Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Physics & Mathematics (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Drawing Aids And Blackboards (AREA)
Abstract
The invention discloses a kind of double deck type interaction blackboard,Including blackboard body,Blackboard body includes the plate face on its surface and the display screen of its internal layer,One end of plate face is fixed on slide rail,And it is fixedly connected with the chain inside slide rail,The side of slide rail is provided with the second stepper motor,The both ends of chain are wrapped on two rollers inside slide rail,And one of roller is connected with the second stepper motor by transmission mechanism,The top of blackboard body is provided with a leading screw,Leading screw is fixed in blackboard body by leading screw fixed feet,Leading screw is provided with a sliding panel,And sliding panel is connected by sliding block with threads of lead screw,The side of leading screw is provided with the first stepper motor,And one end of leading screw passes through the output axis connection of transmission mechanism and the first stepper motor,The device saves big quantity space,And it is provided with the device of dedusting dust suction,Pollution caused by chalk dust can be prevented,The manpower to erase the board can also be saved.
Description
Technical field
The present invention relates to a kind of interactive blackboard, and in particular to a kind of double deck type interaction blackboard, belongs to blackboard field.
Background technology
Blackboard is not to refer in particular to the plate face of black, said in traditional sense be it be one can be with the plane of repeated writing, plate face
It is hard, it is used for imparting knowledge to students.Mostly black, blackish green, white, green plate plate face is blackish green, with chalk-writing, does not stimulate the eye of people
Eyeball, be advantageous to the protection of eyesight;Blank plate face is white, uses various water-based crayon writings.Color coated steel sheet plate face is used and is coated with
The high duty alloy steel plate of wear-resistant coating, plate face thickness is mostly 0.3mm-0.4mm, wear-resisting, is not fallen off, colour-fast, durable in use.Book
Good hand touch is write, writing is clear, easily writes, and it is few easily to wipe dust;New material composite plate is by polymer inlet alloying pellet and ring
Oxygen tree fat is without any processing through disposal pressed moulding surface, and plate face thickness is 3mm, fluent writing, and writing is clearly permanent
Non-slip, non-reflective, noresidue after wiping, visual effect is splendid, and for service life up to more than 15 years, surface plate plate face was smooth after tested
Smooth, cambered plate plate face is curved surface, prevents reflective, and the student for being sitting in each corner can be made also to see writing on the blackboard writing clearly, suitable for compared with
Big classroom.Blackboard is equipped with various supports by support portable plate, conveniently moving, and purposes is wide.Draw back plate lifter plate, can be along specific rail
The multidirectional movement in road, writing is convenient, and magnetic stripe bar magnet is lined with inside blackboard beneficial to viewing magnet boards, or in surface attachment magnetic
Particle.It can be followed closely during use with magnetic, the fixed small-sized educational aid such as magnetic patch or picture is convenient shows.Multifunctional combined board, it is interactive
Electronic whiteboard, band curtain projection plate, staff music blackboard, be traditional blackboard and modern science and technology combination, tradition it is black
Plate, electronic whiteboard, projector, computer, and corresponding teaching software, hardware are equipped with perfectly supplemented with lacking in conventional teaching
Fall into, allow modernized teaching reform really to walk to enter the classroom, be the inexorable trend of current development of educational cause, it is general with interactive blackboard
And it is also widely used for teaching field, but existing interactive blackboard is all writing to be combined with display screen, one of which
Using nanometer touching display screen, its can either write also can multimedia play function, but cost used is too high, is not suitable for wide
General application, another kind is at the both ends of display screen added with handwritten blackboard, but it not only wipes trouble, and dust is more, and takes up space
Area is too big, but existing technology is difficult to overcome above mentioned problem.
The content of the invention
The technical problem to be solved in the present invention be overcome existing interactive blackboard all be writing be combined with display screen, wherein
One kind use nanometer touching display screen, its can either write also can multimedia play function, but cost used is too high, discomfort
Extensive use is closed, another kind is at the both ends of display screen added with handwritten blackboard, but it not only wipes trouble, and dust is more, and accounts for
A kind of the problem of spatial area is too big, there is provided double deck type interaction blackboard.
In order to solve the above-mentioned technical problem, the invention provides following technical scheme:
The invention provides a kind of double deck type interaction blackboard, including blackboard body, the blackboard body includes its surface
The display screen of plate face and its internal layer, one end of the plate face are fixed on slide rail, and are fixed and connected with the chain inside the slide rail
Connect, the side of the slide rail is provided with the second stepper motor, and the both ends of the chain are wrapped in two rollings inside the slide rail
On cylinder, and one of roller is connected with second stepper motor by transmission mechanism, and the top of the blackboard body is provided with
A piece leading screw, the leading screw are fixed in the blackboard body by leading screw fixed feet, and the leading screw is provided with a sliding panel,
And the sliding panel is connected by sliding block with the threads of lead screw, the side of the leading screw is provided with the first stepper motor, and described
By the output axis connection of transmission mechanism and first stepper motor, one end of the sliding panel is provided with two for one end of leading screw
Connector, and the connector is fixedly connected by screw with dedusting support, one end 90-degree bent of the dedusting support and parallel
One piece of dedusting plate is provided between the plate face, the dedusting support and the plate face, the surface of the dedusting plate is provided with felt,
The another side of the dedusting plate is provided with blower fan, and the blower fan is connected with the air channel inside the dedusting plate, and described removes
Dirt plate has some air suction openings with regularly arranged on the joint face of the felt.
As a preferred technical solution of the present invention, the back side of the blackboard body is provided with controller, and the control
Device is electrically connected with display screen, first stepper motor, second stepper motor and the blower fan respectively.
As a preferred technical solution of the present invention, the bottom of the blower fan is provided with a dust hopper, the dust hopper
Top be provided with one piece of dust hopper fixed plate, and the dust hopper fixed plate is fixed on the dedusting plate by fastening bolt.
As a preferred technical solution of the present invention, the dust hopper is also connected with the air channel, and the dust
Bucket and the connectivity part in the air channel are provided with valve.
As a preferred technical solution of the present invention, the bottom of the sliding panel is additionally provided with some balls.
As a preferred technical solution of the present invention, the controller is also electrically connected with multimedia teaching storehouse.
As a preferred technical solution of the present invention, external power supply is additionally provided with the blackboard body.
The beneficial effect that is reached of the present invention is:The device is a kind of double deck type interaction blackboard, and the device is to existing mutual
Dynamic blackboard carries out mechanism improvement, plate face and display screen is in same plane, and can remove plate face by stepper motor to make
With display screen, big quantity space is saved, and is provided with the device of dedusting dust suction, pollution caused by chalk dust can be prevented,
The manpower to erase the board can also be saved, whole device is reasonable in design, easy to use, solve existing interactive blackboard all be writing with
Display screen is combined, and one of which uses nanometer touching display screen, its can either write also can multimedia play function, still
Cost used is too high, is not suitable for extensive use, another kind is at the both ends of display screen added with handwritten blackboard, but it is not only wiped
Trouble, the problem of dust is more, and the area that takes up space is too big, there is provided a kind of double deck type interaction blackboard.
Brief description of the drawings
Accompanying drawing is used for providing a further understanding of the present invention, and a part for constitution instruction, the reality with the present invention
Apply example to be used to explain the present invention together, be not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the overall structure diagram of the present invention;
Fig. 2 is the sectional view of slide rail in the present invention;
Fig. 3 is the longitdinal cross-section diagram of dedusting plate in the present invention;
Fig. 4 is the view in transverse section of dedusting plate in the present invention;
In figure:1st, blackboard body;2nd, plate face;3rd, display screen;4th, leading screw fixed feet;5th, leading screw;6th, sliding panel;7th, the first step
Stepper motor;8th, sliding block;9th, connector;10th, dedusting support;11st, dedusting plate;12nd, felt;13rd, dust hopper;14th, blower fan;15th, it is sliding
Rail;16th, the second stepper motor;17th, controller;18th, roller;19th, chain;20th, air channel;21st, dust hopper fixed plate;22nd, fasten
Bolt;23rd, valve;24th, air suction opening.
Embodiment
The preferred embodiments of the present invention are illustrated below in conjunction with accompanying drawing, it will be appreciated that described herein preferred real
Apply example to be merely to illustrate and explain the present invention, be not intended to limit the present invention.
Embodiment 1
As Figure 1-4, the present invention provides a kind of double deck type interaction blackboard, including blackboard body 1, blackboard body 1 include
The plate face 2 on its surface and the display screen 3 of its internal layer, one end of plate face 2 are fixed on slide rail 15, and with the chain inside slide rail 15
19 are fixedly connected, and the side of slide rail 15 is provided with the second stepper motor 16, and the both ends of chain 19 are wrapped in two inside slide rail 15
On individual roller 18, and one of roller 18 is connected with the second stepper motor 16 by transmission mechanism, and the top of blackboard body 1 is set
There is a leading screw 5, leading screw 5 is fixed in blackboard body 1 by leading screw fixed feet 4, and leading screw 5 is provided with a sliding panel 6, and sliding
Dynamic plate 6 is threadedly coupled by sliding block 8 with leading screw 5, and the side of leading screw 5 is provided with the first stepper motor 7, and one end of leading screw 5 passes through
The output axis connection of transmission mechanism and the first stepper motor 7, one end of sliding panel 6 is provided with two connectors 9, and connector 9 is logical
Cross screw to be fixedly connected with dedusting support 10, one end 90-degree bent of dedusting support 10 and parallel to plate face 2, dedusting support 10 with
One piece of dedusting plate 11 is provided between plate face 2, the surface of dedusting plate 11 is provided with felt 12, and the another side of dedusting plate 11 is provided with blower fan
14, and blower fan 14 is connected with the air channel 20 inside dedusting plate 11, and dedusting plate 11 with it is regularly arranged on the joint face of felt 12
There are some air suction openings 24.
The back side of blackboard body 1 is provided with controller 17, and controller 17 respectively with display screen 3, the first stepper motor 7,
Two stepping motor 16 and blower fan 14 are electrically connected with, and control the operating of each electrical equipment respectively by controller 17.
The bottom of blower fan 14 is provided with a dust hopper 13, and the top of dust hopper 13 is provided with one piece of dust hopper fixed plate 21, and
Dust hopper fixed plate 21 is fixed on dedusting plate 11 by fastening bolt 22, is easy to collect the dust of suction, anti-major structure
Into secondary pollution, and cleaning can be disassembled.
Dust hopper 13 is also connected with air channel 20, and dust hopper 13 and the connectivity part in air channel 20 are provided with valve 23, prevent from receiving
The dust backflow of collection, causes secondary pollution.
The bottom of sliding panel 6 is additionally provided with some balls, reduces frictional force when sliding, slides sliding panel 6 more laborsaving.
Controller 17 is also electrically connected with multimedia teaching storehouse, is easy to play in teaching on a display screen by multimedia
Hold.
External power supply is additionally provided with blackboard body 1, is easy to provide electric energy for each electrical equipment of device.
The device is a kind of double deck type interaction blackboard, when needing with the device, when needing writing, is directly existed with chalk
Write, imparted knowledge to students in plate face 2, control the first stepper motor 7 to rotate by controller 17 during wiping, make to remove by transmission mechanism
Dirt plate 11 moves back and forth, and opens blower fan 14, while wiping by felt 12 to the letter written with chalk on plate face surface, blower fan 14
Negative pressure region is formed under rotation in air channel 20, dust caused by wiping is inhaled into by air suction opening 24 in dust hopper 13,
Need play multimedia teaching when, open the second stepper motor 17 drive slide rail 15 in chain 19 rotate, make plate face 2 along
Slide rail 15, which declines, spills display screen 3, you can plays multimedia teaching video.
The beneficial effect that is reached of the present invention is:The device is a kind of double deck type interaction blackboard, and the device is to existing mutual
Dynamic blackboard carries out mechanism improvement, plate face and display screen is in same plane, and can remove plate face by stepper motor to make
With display screen, big quantity space is saved, and is provided with the device of dedusting dust suction, pollution caused by chalk dust can be prevented,
The manpower to erase the board can also be saved, whole device is reasonable in design, easy to use, solve existing interactive blackboard all be writing with
Display screen is combined, and one of which uses nanometer touching display screen, its can either write also can multimedia play function, still
Cost used is too high, is not suitable for extensive use, another kind is at the both ends of display screen added with handwritten blackboard, but it is not only wiped
Trouble, the problem of dust is more, and the area that takes up space is too big, there is provided a kind of double deck type interaction blackboard.
Finally it should be noted that:The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention,
Although the present invention is described in detail with reference to the foregoing embodiments, for those skilled in the art, it still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic.
Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., it should be included in the present invention's
Within protection domain.
Claims (7)
1. a kind of double deck type interaction blackboard, including blackboard body (1), it is characterised in that the blackboard body (1) includes its surface
Plate face (2) and its internal layer display screen (3), one end of the plate face (2) is fixed on slide rail (15), and with the slide rail
(15) internal chain (19) is fixedly connected, and the side of the slide rail (15) is provided with the second stepper motor (16), the chain
(19) both ends are wrapped on two internal rollers (18) of the slide rail (15), and one of roller (18) and described the
Two stepping motor (16) is connected by transmission mechanism, and the top of the blackboard body (1) is provided with a leading screw (5), the leading screw
(5) it is fixed on by leading screw fixed feet (4) in the blackboard body (1), the leading screw (5) is provided with a sliding panel (6), and
The sliding panel (6) is threadedly coupled by sliding block (8) with the leading screw (5), and the side of the leading screw (5) is provided with the first stepping electricity
Machine (7), and one end of the leading screw (5) passes through transmission mechanism and the output axis connection of first stepper motor (7), the cunning
One end of dynamic plate (6) is provided with two connectors (9), and the connector (9) is fixedly connected by screw with dedusting support (10),
One end 90-degree bent of the dedusting support (10) and parallel to the plate face (2), the dedusting support (10) and the plate face
(2) be provided with one piece of dedusting plate (11) between, the surface of the dedusting plate (11) is provided with felt (12), the dedusting plate (11) it is another
Blower fan (14) is simultaneously provided with, and the blower fan (14) is connected with the air channel (20) of the dedusting plate (11) inside, and it is described
Dedusting plate (11) has some air suction openings (24) with regularly arranged on the joint face of the felt (12).
A kind of 2. double deck type interaction blackboard according to claim 1, it is characterised in that the back side of the blackboard body (1)
Provided with controller (17), and the controller (17) respectively with display screen (3), first stepper motor (7), the second step
Stepper motor (16) and the blower fan (14) are electrically connected with.
3. a kind of double deck type interaction blackboard according to claim 1, it is characterised in that the bottom of the blower fan (14) is provided with
One dust hopper (13), the top of the dust hopper (13) is provided with one piece of dust hopper fixed plate (21), and the dust hopper is fixed
Plate (21) is fixed on the dedusting plate (11) by fastening bolt (22).
A kind of 4. double deck type interaction blackboard according to claim 3, it is characterised in that the dust hopper (13) also with it is described
Air channel (20) is connected, and the dust hopper (13) and the connectivity part in the air channel (20) are provided with valve (23).
5. a kind of double deck type interaction blackboard according to claim 1, it is characterised in that the bottom of the sliding panel (6) is also
Provided with some balls.
A kind of 6. double deck type interaction blackboard according to claim 1, it is characterised in that the controller (17) also with more matchmakers
Body teaching storehouse is electrically connected with.
7. a kind of double deck type interaction blackboard according to claim 1, it is characterised in that also set on the blackboard body (1)
There is external power supply.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710671620.1A CN107443973A (en) | 2017-08-08 | 2017-08-08 | A kind of double deck type interaction blackboard |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710671620.1A CN107443973A (en) | 2017-08-08 | 2017-08-08 | A kind of double deck type interaction blackboard |
Publications (1)
Publication Number | Publication Date |
---|---|
CN107443973A true CN107443973A (en) | 2017-12-08 |
Family
ID=60491209
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201710671620.1A Pending CN107443973A (en) | 2017-08-08 | 2017-08-08 | A kind of double deck type interaction blackboard |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN107443973A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108162647A (en) * | 2018-01-08 | 2018-06-15 | 四川省达县职业高级中学 | Automatic erasing blackboard machine |
CN108621653A (en) * | 2018-05-10 | 2018-10-09 | 何川 | A kind of mathematical education multifunctional assisting device |
CN109050090A (en) * | 2018-07-11 | 2018-12-21 | 姜家治 | A kind of multifunctional blackboard for education |
CN109986903A (en) * | 2019-05-22 | 2019-07-09 | 磐安西昂电子有限公司 | A kind of teaching auxiliary system of cleanable blackboard |
CN111338552A (en) * | 2019-01-21 | 2020-06-26 | 鸿合科技股份有限公司 | Chalk handwriting writing method and device and electronic equipment |
CN111845169A (en) * | 2020-08-05 | 2020-10-30 | 陕西理工大学 | Auxiliary device for mathematical education |
CN112385979A (en) * | 2020-11-17 | 2021-02-23 | 上海简程网络科技有限公司 | Course content display device for distance education |
CN114537021A (en) * | 2022-03-05 | 2022-05-27 | 林俊楚 | Touch teaching blackboard of safety ring protects |
CN116189512A (en) * | 2023-04-27 | 2023-05-30 | 福建师范大学 | Interactive teaching digital workbench |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101367308A (en) * | 2008-10-06 | 2009-02-18 | 胡安好 | Multifunctional environment friendly blackboard |
CN204712725U (en) * | 2015-06-26 | 2015-10-21 | 罗小东 | A kind of integral type dust collecting blackboard |
CN205311153U (en) * | 2015-12-31 | 2016-06-15 | 北京祖阁家具有限公司 | Double -deck blank that removes |
CN105882246A (en) * | 2016-04-12 | 2016-08-24 | 宿州学院 | Teaching appliance |
CN206124534U (en) * | 2016-07-02 | 2017-04-26 | 深圳市中幼国际教育科技有限公司 | Teaching is with automatic blackboard of erasing dust |
CN206357875U (en) * | 2016-11-07 | 2017-07-28 | 孙鼎峰 | One kind automation blackboard |
-
2017
- 2017-08-08 CN CN201710671620.1A patent/CN107443973A/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101367308A (en) * | 2008-10-06 | 2009-02-18 | 胡安好 | Multifunctional environment friendly blackboard |
CN204712725U (en) * | 2015-06-26 | 2015-10-21 | 罗小东 | A kind of integral type dust collecting blackboard |
CN205311153U (en) * | 2015-12-31 | 2016-06-15 | 北京祖阁家具有限公司 | Double -deck blank that removes |
CN105882246A (en) * | 2016-04-12 | 2016-08-24 | 宿州学院 | Teaching appliance |
CN206124534U (en) * | 2016-07-02 | 2017-04-26 | 深圳市中幼国际教育科技有限公司 | Teaching is with automatic blackboard of erasing dust |
CN206357875U (en) * | 2016-11-07 | 2017-07-28 | 孙鼎峰 | One kind automation blackboard |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108162647A (en) * | 2018-01-08 | 2018-06-15 | 四川省达县职业高级中学 | Automatic erasing blackboard machine |
CN108621653A (en) * | 2018-05-10 | 2018-10-09 | 何川 | A kind of mathematical education multifunctional assisting device |
CN109050090A (en) * | 2018-07-11 | 2018-12-21 | 姜家治 | A kind of multifunctional blackboard for education |
CN111338552A (en) * | 2019-01-21 | 2020-06-26 | 鸿合科技股份有限公司 | Chalk handwriting writing method and device and electronic equipment |
CN111338552B (en) * | 2019-01-21 | 2022-03-25 | 鸿合科技股份有限公司 | Chalk handwriting writing method and device and electronic equipment |
CN109986903A (en) * | 2019-05-22 | 2019-07-09 | 磐安西昂电子有限公司 | A kind of teaching auxiliary system of cleanable blackboard |
CN109986903B (en) * | 2019-05-22 | 2019-11-22 | 磐安西昂电子有限公司 | A kind of teaching auxiliary system of cleanable blackboard |
CN111845169A (en) * | 2020-08-05 | 2020-10-30 | 陕西理工大学 | Auxiliary device for mathematical education |
CN112385979A (en) * | 2020-11-17 | 2021-02-23 | 上海简程网络科技有限公司 | Course content display device for distance education |
CN114537021A (en) * | 2022-03-05 | 2022-05-27 | 林俊楚 | Touch teaching blackboard of safety ring protects |
CN116189512A (en) * | 2023-04-27 | 2023-05-30 | 福建师范大学 | Interactive teaching digital workbench |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN107443973A (en) | A kind of double deck type interaction blackboard | |
CN203818838U (en) | Display board for economics teaching | |
CN108357259A (en) | A kind of environmental protection blackboard for education | |
CN203528140U (en) | Interactive multifunctional integral blackboard | |
CN108819570A (en) | A kind of French word teaching comparison displaying blackboard | |
CN208938373U (en) | A kind of Multifunctional teaching device based on big data education | |
CN111497496B (en) | Chinese interactive teaching blackboard | |
CN205058968U (en) | Novel multi -functional blackboard | |
CN104070894B (en) | With the magnetic writing board of handwriting erasing mechanism | |
CN206436687U (en) | Novel and multifunctional blackboard | |
CN104589857A (en) | Folding blackboard | |
CN203004755U (en) | Double-layer cleaning-free blackboard | |
CN214606792U (en) | Supporting structure of colleges and universities' classroom slidingtype blackboard | |
CN208515234U (en) | A kind of interaction clipboard based on bluetooth connection | |
CN107633709A (en) | A kind of servicing unit for finance training | |
CN208428848U (en) | A kind of college English Teaching display board | |
CN209240738U (en) | A kind of wisdom classroom interaction blackboard | |
CN208834546U (en) | A kind of Advertisement teaching auxiliary device | |
CN203179319U (en) | Multimedia teaching device | |
CN208438941U (en) | A kind of language teaching Portable movable blackboard | |
CN208903495U (en) | Display board is used in a kind of think of political affairs teaching | |
CN2754898Y (en) | Blackboard | |
CN2695251Y (en) | Dust-proof blackboard eraser | |
CN204367667U (en) | A kind of convertible automatic erasing blackboard | |
CN206961337U (en) | The multimedia teaching apparatus used for Financial Management Teaching |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171208 |
|
RJ01 | Rejection of invention patent application after publication |