CN107443973A - A kind of double deck type interaction blackboard - Google Patents

A kind of double deck type interaction blackboard Download PDF

Info

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
Application number
CN201710671620.1A
Other languages
Chinese (zh)
Inventor
蒋智谋
蒋中文
李敬龙
胡加锋
谢水兵
董子侠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui Zhuangyuanlang Electronic Technology Co Ltd
Original Assignee
Anhui Zhuangyuanlang Electronic Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Anhui Zhuangyuanlang Electronic Technology Co Ltd filed Critical Anhui Zhuangyuanlang Electronic Technology Co Ltd
Priority to CN201710671620.1A priority Critical patent/CN107443973A/en
Publication of CN107443973A publication Critical patent/CN107443973A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L1/00Repeatedly-usable boards or tablets for writing or drawing
    • B43L1/04Blackboards
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L21/00Blackboard or slate cleaning devices
    • B43L21/02Blackboard or slate cleaning devices with means for absorbing the chalk dust
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09BEDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B5/00Electrically-operated educational appliances
    • G09B5/02Electrically-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

A kind of double deck type interaction blackboard
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.
CN201710671620.1A 2017-08-08 2017-08-08 A kind of double deck type interaction blackboard Pending CN107443973A (en)

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

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CN107443973A true CN107443973A (en) 2017-12-08

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Cited By (9)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

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Application publication date: 20171208

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