CN209320550U - New type blackboard based on Human Engineering theory - Google Patents
New type blackboard based on Human Engineering theory Download PDFInfo
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- CN209320550U CN209320550U CN201822119558.8U CN201822119558U CN209320550U CN 209320550 U CN209320550 U CN 209320550U CN 201822119558 U CN201822119558 U CN 201822119558U CN 209320550 U CN209320550 U CN 209320550U
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- Drawing Aids And Blackboards (AREA)
Abstract
The utility model relates to the new type blackboards based on Human Engineering theory, the utility model replaces the ingenious handy belt-type blackboard of existing blackboard, the positive blackboard played of writing can be turned to the back side by the rotation of belt, the two sides of blackboard are also added into wiping sliver, eliminate the time of wiping blackboard, the utility model eliminates the work that teacher erases the board, teacher is allowed adequately to be rested, improve teaching quality, reciprocal wiping arrangement is added in the utility model simultaneously, when wiping sliver is sordid to blackboard-cleaning, thorough cleaning again can be carried out to blackboard, and in shell, the chalk dust of generation concentrates in shell, it not will cause air pollution, simultaneously will not the body of teacher damage, it kills two birds with one stone, it is practical.
Description
Technical field
The utility model belongs to the technical field of instructional device, more particularly to the new type blackboard based on Human Engineering theory.
Background technique
Blackboard will be more or less used in the writing on the blackboard of dais in each stage teachers of teaching, for engineering, of science
Almost a class is all using blackboard to some teachers for some courses.Although there is ppt displaying to impart knowledge to students now, this can only
It is aided education, needs to teach use chalk still traditional for teacher to student scene calculating scene in blackboard for some
On write it is maximally efficient.For blackboard using most for development at present, knowledge is carried out using blackboard writing on the blackboard and is taught in religion
Be essential, especially senior high school period, and almost the every class of each teacher will be spent a lot of time using black in high school
Plate writing on the blackboard.It attends class a long-standing problem this generates teachers.After traditional blackboard has been write, writes need to wipe again
Blackboard just produces some problems during erasing the board:
The pollution of 1 chalk dust.Dust will lead to two kinds of pollutions again, first is that in sucking teacher's lung, up to the suction of more than ten years
Dirt will lead to teacher and suffer from serious occupational disease, extremely damage to body.Second is that the pollution around dais.Ground under dais
One thick layer dust of board stack, the desk on dais floats one layer of lime, not only swollen but also random, and very influence teacher attends class mood.It is right
It can be also affected by this for the front-seat student of some close blackboards.(senior middle school and be affected by this seriously with the student of next stage)
2 upper class hours " by irregular steps " go to erase the board.This will lead to the right hand of teacher and right hand arm and especially tires out, if
It puts forth one's strength again very more tired according to wiping.Moreover, this will waste time.Most teachers are right hand writings on the blackboard, and then the right hand is wiped
Blackboard, the whole process right hand, which always is, makes somebody a mere figurehead, and will lead to DOMS, falls sick from overwork, and also results in influence (I to shoulder
Estimation meeting).
Therefore, we urgently a kind of new type blackboard based on Human Engineering theory to solve problem above.
Utility model content
In view of the above problems, in order to solve the problems in the existing technology, we provide one kind to be based on Human Engineering
Theoretical new type blackboard, solves the problems, such as that chalk dust pollutes everywhere, while solving the fatigue caused by teacher that erases the board.
The scheme that the utility model is taken are as follows: the new type blackboard based on Human Engineering theory, including shell, feature exist
In vertical rotating is connected with two groups of transfer rollers being horizontally arranged at interval in the shell, and the transfer roller is arranged with a front end face
Belt beyond housing forward end face, the belt meet can writing words on it, pass through between the shaft of transfer roller described in two groups
Belt is sequentially connected, and two groups of connections being placed at left and right sides of belt front end face are vertically connected on the front end face of the shell
Bar is connected with the wiping sliver with belt matched in the connecting rod, and belt can be wiped by meeting wiping sponge, institute
It states sliver and shell is connected with multiple groups clamping pin, meet the compression degree that clamping pin is adjusted between sliver and belt front end face,
The shaft of one of them transfer roller is sequentially connected through the output shaft of belt and the driving motor being immobilized in the shell, institute
The output axis connection one for stating driving motor is placed in the intracorporal reciprocal wiping arrangement of shell, meet reciprocal wiping arrangement can be to belt after
End face is back and forth wiped.
Preferably, the reciprocal wiping includes the worm tooth that is opened in driving motor output shaft, the driving motor it is defeated
Shaft is engaged through worm tooth with the worm gear being rotatably connected in shell on rear end face, the coaxially connected first gear of worm gear,
Further include three groups and be vertically connected to rear end face and the reciprocating apparatus of laterally spaced setting in shell, the reciprocating apparatus includes perpendicular
It is vertical on L shape bar described in two groups to being connected in shell two groups of mutually matched L shape bars on rear end face and being horizontally arranged at interval
It is slidably matched and U-board, meets that U-board is only vertically movable along L shape bar, and the upper and lower ends between two groups of L shape bars are provided with rotation
It is connected to the intracorporal belt pulley of shell, drive belt is arranged between two groups of belt pulleys, a drive pin is connected on the drive belt,
The U-board is laterally provided with the strip hole of one with drive pin cooperation, and meeting drive pin can drive U-board vertically movable along L shaped plate,
Wiping sponge is provided on the front end face of the U-board, the rear end face of belt can be wiped by meeting wiping sponge, the wiping
It wipes and is connected with multiple groups spring between sponge and U-board；
Percutaneous band is sequentially connected between the shaft of belt pulley in the adjacent reciprocating apparatus, described in one of them
The coaxially connected second gear of the shaft of a belt pulley in reciprocating apparatus, the second gear are engaged with first gear, and the
The radius of one gear is greater than second gear.
Preferably, three groups of reciprocating apparatuses are respectively placed in the left side, right side and middle part of belt rear end face, in three groups of reciprocating apparatuses
The initial position of wiping sponge be respectively at the different position in upper, middle and lower three.
Preferably, multiple groups link block, the clamping pin and connecting rod screw thread are connected on the front end face of the wiping sliver
Cooperate and is rotatably assorted in end face and link block.
Preferably, the surrounding clearance fit of the front end face of the shell and belt, the rear side setting of the belt front end face
There is the support plate being vertically connected on housing forward end face.
Preferably, what the lower section of the belt was provided with that be connected on shell and front end face is higher by belt sidewards connects object
Plate, described one end for connecing object plate connect a storage box.
The advantages of the utility model: the utility model replaces the ingenious handy belt-type blackboard of existing blackboard,
The positive blackboard played of writing can be turned to the back side by the rotation of belt, and the two sides of blackboard are also added into wiping sliver, eliminate
The time of blackboard is wiped, the utility model eliminates the work that teacher erases the board, teacher is allowed adequately to be rested, and raising is given lessons
Quality, while reciprocal wiping arrangement is added in the utility model, it, can be to blackboard when wiping sliver is sordid to blackboard-cleaning
Thorough cleaning again is carried out, and in shell, the chalk dust of generation is concentrated in shell, not will cause air pollution, together
The body of teacher Shi Buhui damages, and kills two birds with one stone, practical.
Detailed description of the invention
Fig. 1 is the perspective view of the utility model.
Fig. 2 is the main view of the utility model.
Fig. 3 is that the utility model removes the perspective view after shell.
Fig. 4 is the three-dimensional structure diagram of the reciprocal wiping arrangement of the utility model.
Fig. 5 is the schematic perspective view visual angle one that reciprocating apparatus is driven in the utility model.
Fig. 6 is the schematic perspective view visual angle two that reciprocating apparatus is driven in the utility model.
Fig. 7 is the structural schematic diagram of U-board and its coupling part in the utility model.
Fig. 8 is the schematic diagram that clamping pin is connect with wiping sliver in the utility model.
Appended drawing reference: 1, shell；2, transfer roller；3, belt；4, connecting rod；5, sliver is wiped；6, clamping pin；7, it drives
Motor；8, worm tooth；9, worm gear；10, first gear；11, reciprocating apparatus；12, L shape bar；13, U-shaped bar；14, belt pulley；15,
Drive belt；16, drive pin；17, strip hole；18, sponge is wiped；19, spring；20, second gear；21, link block；22, it props up
Fagging；23, object plate is connect；24, storage box.
Specific embodiment
Specific embodiment of the present utility model is described in further detail below in conjunction with attached drawing.
Embodiment one, in conjunction with attached drawing 1-8, based on the new type blackboard of Human Engineering theory, including shell 1, the front end of shell 1
It is provided with for placing blackboard, which is characterized in that vertical rotating is connected with two groups of transfer rollers being horizontally arranged at interval in the shell 1
2, the upper and lower ends of transfer roller 2 are rotatably connected in shell 1, and the transfer roller 2 is arranged with a front end face beyond 1 front end face of shell
Belt 3, the belt 3 meet can writing words on it, passed through belt 3 between the shaft of transfer roller 2 described in two groups
The front end face of dynamic connection, belt 3 exceeds 1 front end face of shell, constitutes the structure of blackboard, user can write on its front end face
Word rotates transfer roller 2, the writing on the blackboard write can be turned to rear, be vertically connected with two groups on the front end face of the shell 1
The connecting rod 4 being placed at left and right sides of 3 front end face of belt, the upper and lower ends of transfer roller 2 are arranged in two groups of connecting rods 4, u-shaped to set
It sets, the connecting rod 4 of U-shaped is upside down on shell 1, and the wiping sliver 5 with 3 matched of belt is connected in the connecting rod 4, full
Foot wiping sponge 18 can wipe belt 3, and the sliver and shell 1 are connected with multiple groups clamping pin 6, and meeting clamping pin 6 can
The compression degree between sliver and 3 front end face of belt is adjusted, sliver can wipe belt 3 when rotating transfer roller 2,
It as the connection type of clamping pin 6 and sliver, will be described in detail in the embodiment of lower section, rotation clamping pin 6 may make
Sliver compresses belt 3, and slender height and the height of belt 3 match, and guarantees that sliver can be to whole plates on belt 3
Book is wiped, output shaft of the shaft of one of them transfer roller 2 through belt 3 with the driving motor 7 being fixed in shell 1
It is sequentially connected, driving motor 7 provides power output for live-roller, and the output axis connection one of the driving motor 7 is placed in shell
Reciprocal wiping arrangement in body 1, meet reciprocal wiping arrangement can the rear end face to belt 3 back and forth wiped, in the mistake of rotation
Cheng Zhong turns to the writing on the blackboard on front end face in subsequent shell 1, and at the same time, reciprocal wiping arrangement can be to 3 rear end face of belt
On writing on the blackboard be wiped repeatedly, be tightly connected between shell 1 and belt 3, therefore, to 3 rear end face of belt namely after
When side blackboard is wiped repeatedly, the chalk dust of generation can be scattered completely to the shell 1 at rear, avoid the dust generated to teacher
Or user is damaging, and at the same time, also saves the labour of teacher or user.
Embodiment two, on the basis of example 1, in conjunction with attached drawing 1-8, the reciprocal wiping includes being opened in driving motor 7
Worm tooth 8 on output shaft, it may also be said to it is a coaxially connected worm screw on the output shaft of driving motor 7, the driving motor 7
Output shaft is engaged through worm tooth 8 with the worm gear 9 for being rotatably connected in shell 1 on rear end face, and worm gear 9 is rotatably connected on through bearing block
On rear end face in shell 1, the lower section of worm gear 9 is arranged in the coaxially connected first gear 10 of the worm gear 9, first gear 10,
Further include three groups and is vertically connected to rear end face and the reciprocating apparatus of laterally spaced setting 11 in shell 1, three groups of reciprocating apparatuses 11
Point left, center, right are arranged on the rear end face in shell 1, after two transfer rollers 2 of left and right side are arranged in left end and right end
Side, the reciprocating apparatus 11 at middle part be in them between two, but the quality in order to guarantee wiping, can not only use three groups it is past
Multiple wiping arrangement, is arranged the purpose of reciprocal wiping arrangement at this time, is because wiping only with sliver, in teacher or user
Firmly when being write on blackboard, the sliver that writing on the blackboard is difficult to be allowed to stand for is rubbed off, therefore is filled using the wiping of reciprocating motion type
Set the quality for greatly improving wiping, the reciprocating apparatus 11 includes vertically being connected in shell 1 on rear end face and lateral separation is set
The mutually matched L shape bar 12 of two groups set slides vertically cooperation and U-board 13 on L shape bar 12 described in two groups, meets U-board 13
Only vertically movable along L shape bar 12, two groups of L shape bars 12 are in symmetrical structure, and in the cooperation with U-board 13, U-board 13 can only be along L
Shape plate is vertically movable, and the upper and lower ends between two groups of L shape bars 12 are provided with the belt pulley 14 being rotatably connected in shell 1, and two groups
It is arranged with drive belt 15 between belt pulley 14, a drive pin 16 is connected on the drive belt 15, the U-board 13 is laterally opened
There is a strip hole 17 cooperated with drive pin 16, meeting drive pin 16 can drive U-board 13 vertically movable along L shaped plate, drive skin
Band 15 in the course of rotation, drives drive pin 16 to be rotated, and drive pin 16 can carry out transverse shifting along strip hole 17 at this time,
At this point, drive pin 16 can drive U-board 13 reciprocating in the vertical direction with belt 3, on the front end face of the U-board 13
It is provided with wiping sponge 18, the rear end face of belt 3 can be wiped by meeting wiping sponge 18, the wiping sponge 18 and U-shaped
It is connected with multiple groups spring 19 between plate 13, wipes the connection for being connected on the rear end face of sponge 18 and matching with wiping sponge 18
Plate, connecting spring 19 between connecting plate and the front end face of U-board 13, there are a pressing forces for spring 19, so that wiping sponge 18
It is promptly fitted in behind blackboard i.e. belt 3, the setting of spring 19 herein is unsuitable too long, only need to there are pressing force, bullets
Spring 19 is too long, and during reciprocating movement, wiping sponge 18 is easily toppled, and wipes sponge 18 in the process of moving,
It can be more conducive to the wiping of blackboard；
It is sequentially connected between the shaft of belt pulley 14 in the adjacent reciprocating apparatus 11 through belt 3, belt 3 rises
To the effect of transmitting power, the coaxially connected second gear of shaft of the belt pulley 14 in one of them described reciprocating apparatus 11
20, the second gear 20 is engaged with first gear 10, and the radius of first gear 10 be greater than second gear 20, herein first
The radius of gear 10 is greater than second gear 20, is in order to which during belt 3 rotates, drive belt 15 can be obtained faster to blackboard
The back side wiped, first gear 10 and second gear 20 play the role of acceleration herein, and belt pulley 14 is through second gear 20
Engaged transmission, rotation becomes faster, so that the reciprocating speed of wiping sponge 18 becomes faster, wiping effect is more preferable.
Embodiment three, on the basis of example 2, in conjunction with attached drawing 1-8, after three groups of reciprocating apparatuses 11 are respectively placed in belt 3
The initial position at left side, right side and the middle part of end face, the wiping sponge 18 in three groups of reciprocating apparatuses 11 is respectively at upper, middle and lower
Three different positions, such that the effect of wiping is more preferable.
Example IV in conjunction with attached drawing 1-8, is connected on the front end face of the wiping sliver 5 on the basis of example 1
Multiple groups link block 21, the clamping pin 6 are threadedly engaged with connecting rod 4 and are rotatably assorted in end face and link block 21, rotate multiple
Clamping pin 6, so that wiping sliver 5 can be towards 3 front end face of belt or far from 3 front end face of belt under the action of being threadedly engaged
Direction it is mobile, at this point, can play the role of adjusting compression degree.
Embodiment five, on the basis of example 1, in conjunction with attached drawing 1-8, the front end face of the shell 1 and the four of belt 3
All clearance fits enable the chalk powder total number after wiping to be prohibited in shell 1 by circle, and the rear side of 3 front end face of belt is arranged
There are the support plate 22 being vertically connected on 1 front end face of shell, the L-shaped arrangement of support plate 22, front end face of the support plate 22 to belt 3
It is supported, so that can guarantee that belt 3 can be carried out normal writing when writing on belt 3.
Embodiment six, on the basis of example 1, in conjunction with attached drawing 1-8, the lower section of the belt 3 is provided with connection sidewards
What on shell 1 and front end face was higher by belt 3 connects object plate 23, and it is oblique to connect object plate 23, connect object plate 23 may collect in it is black
The perhaps broken chalk fallen when plate mathematics, which connects object plate 23, can be used for the chalk that teacher or user temporarily store,
Described one end for connecing object plate 23 connects a storage box 24, and storage box 24 can store sundries or discarded chalk.
It is finished when the utility model is used, being write in the front of blackboard, when needing to switch over, opens driving motor 7,
The output shaft of driving motor 7 drives the shaft of transfer roller 2 to be rotated through belt 3, and belt 3 is rotated at this time, will be positive
Writing on the blackboard is moved to rear, and at the same time, the output shaft of driving motor 7 drives worm gear 9 to be rotated through worm tooth 8, then through half
Diameter difference first gear 10 and second gear 20 drive belt pulley 14 to accelerate rotation, and belt pulley 14 drives drive belt 15 into turning
Dynamic, drive belt 15 during rotation, will drive drive pin 16 and be moved in the strip hole 17 of U-board 13, drive skin
Rotation with 15 drives U-board 13 vertically moving back and forth, so that wiping sponge 18 wipes the back side of blackboard, it will
Writing on the blackboard thoroughly wipes out, since reciprocal wiping arrangement is arranged in left, center, right, and the wiping sponge 18 on three groups of reciprocal wiping arrangements
It is arranged in upper, middle and lower, therefore, wiping effect is very good, and chalk dust concentrates in shell 1, it will be appreciated that by
It is very light in chalk powder, it is more likely that the back side of blackboard to be attached to, at this point, the wiping sliver 5 of two sides is during belt 3 rotates
Secondary wiping is carried out to blackboard, it is very clean blackboard that guarantee, which is presented in face of user, is finished wait rotate, and driving is closed
Motor 7.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (6)
1. based on the new type blackboard of Human Engineering theory, including shell (1), which is characterized in that the interior vertical rotating of the shell (1)
Two groups of transfer rollers being horizontally arranged at interval (2) are connected with, the transfer roller (2) is arranged with a front end face beyond shell (1) front end
The belt (3) in face, the belt (3) meet can writing words on it, through belt between the shaft of transfer roller described in two groups (2)
(3) it is sequentially connected, two groups is vertically connected on the front end face of the shell (1) and is placed at left and right sides of belt (3) front end face
Connecting rod (4), be connected on the connecting rod (4) with the wiping sliver (5) of belt (3) matched, meet wiping sponge
(18) belt (3) can be wiped, the sliver and shell (1) are connected with multiple groups clamping pin (6), and meeting clamping pin (6) can
Adjust the compression degree between sliver and belt (3) front end face, the shaft of one of them transfer roller (2) through belt (3) and
The output shaft for the driving motor (7) being fixed in shell (1) is sequentially connected, the output axis connection of the driving motor (7)
One is placed in the reciprocal wiping arrangement in shell (1), and the rear end face of belt (3) can back and forth be wiped by meeting reciprocal wiping arrangement
It wipes.
2. the new type blackboard according to claim 1 based on Human Engineering theory, which is characterized in that the reciprocal wiping packet
The worm tooth (8) being opened on driving motor (7) output shaft is included, the output shaft of the driving motor (7) is through worm tooth (8) and rotation
Worm gear (9) engagement being connected on shell (1) interior rear end face, the coaxially connected first gear (10) of worm gear (9) further include
Three groups of reciprocating apparatuses (11) for being vertically connected to the interior rear end face of shell (1) and laterally spaced setting, the reciprocating apparatus (11)
Including being vertically connected to two groups of mutually matched L shape bars (12) on shell (1) interior rear end face and being horizontally arranged at interval, two groups of institutes
It states and slides vertically cooperation and U-board (13) on L shape bar (12), meet U-board (13) only, two group Ls vertically movable along L shape bar (12)
Upper and lower ends between shape bar (12) are provided with the belt pulley (14) being rotatably connected in shell (1), two groups of belt pulleys (14) it
Between be arranged with drive belt (15), connected a drive pin (16) on the drive belt (15), the U-board (13) is laterally provided with
One strip hole (17) cooperated with drive pin (16), meeting drive pin (16) can drive U-board (13) vertically movable along L shaped plate,
Wiping sponge (18) is provided on the front end face of the U-board (13), meeting wiping sponge (18) can be to the rear end face of belt (3)
It is wiped, is connected with multiple groups spring (19) between the wiping sponge (18) and U-board (13)；
It is sequentially connected between the shaft of belt pulley (14) in the adjacent reciprocating apparatus (11) through belt (3), wherein
The coaxially connected second gear (20) of shaft of a belt pulley (14) in one reciprocating apparatus (11), the second gear
(20) it is engaged with first gear (10), and the radius of first gear (10) is greater than second gear (20).
3. the new type blackboard according to claim 2 based on Human Engineering theory, which is characterized in that three groups of reciprocating apparatuses
(11) it is respectively placed in left side, right side and the middle part of belt (3) rear end face, the wiping sponge (18) in three groups of reciprocating apparatuses (11)
Initial position is respectively at the different position in upper, middle and lower three.
4. the new type blackboard according to claim 1 based on Human Engineering theory, which is characterized in that the wiping sliver
(5) be connected on front end face multiple groups link block (21), the clamping pin (6) and connecting rod (4) be threadedly engaged and end face with
Link block (21) is rotatably assorted.
5. the new type blackboard according to claim 1 based on Human Engineering theory, which is characterized in that the shell (1)
The surrounding clearance fit of front end face and belt (3) is provided on rear side of belt (3) front end face and is vertically connected to shell (1)
Support plate (22) on front end face.
6. the new type blackboard according to claim 1 based on Human Engineering theory, which is characterized in that the belt (3)
Lower section is provided be connected on shell (1) and front end face sidewards and is higher by connecing object plate (23) for belt (3), described to connect object plate (23)
One end connect a storage box (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822119558.8U CN209320550U (en) | 2018-12-18 | 2018-12-18 | New type blackboard based on Human Engineering theory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822119558.8U CN209320550U (en) | 2018-12-18 | 2018-12-18 | New type blackboard based on Human Engineering theory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209320550U true CN209320550U (en) | 2019-08-30 |
Family
ID=67727079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822119558.8U Expired - Fee Related CN209320550U (en) | 2018-12-18 | 2018-12-18 | New type blackboard based on Human Engineering theory |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209320550U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110744952A (en) * | 2019-10-24 | 2020-02-04 | 郑州航空工业管理学院 | Advanced mathematics teaching aid |
| CN110920298A (en) * | 2019-12-12 | 2020-03-27 | 江西省润华电子商务有限公司 | Low-dust soft blackboard |
| CN112046179A (en) * | 2020-09-10 | 2020-12-08 | 焦作大学 | Blackboard writing wiping equipment capable of automatically positioning area for teaching rod controller |
| CN112248686A (en) * | 2020-10-22 | 2021-01-22 | 邱玲玲 | Blackboard curtain type easy-to-clean blackboard |
| CN112549824A (en) * | 2020-12-23 | 2021-03-26 | 常州纺织服装职业技术学院 | Blackboard capable of being automatically cleaned |
| CN113733787A (en) * | 2021-08-12 | 2021-12-03 | 江苏盛翔电子科技有限公司 | Multilayer combined type auxiliary screen blackboard |
-
2018
- 2018-12-18 CN CN201822119558.8U patent/CN209320550U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110744952A (en) * | 2019-10-24 | 2020-02-04 | 郑州航空工业管理学院 | Advanced mathematics teaching aid |
| CN110920298A (en) * | 2019-12-12 | 2020-03-27 | 江西省润华电子商务有限公司 | Low-dust soft blackboard |
| CN112046179A (en) * | 2020-09-10 | 2020-12-08 | 焦作大学 | Blackboard writing wiping equipment capable of automatically positioning area for teaching rod controller |
| CN112248686A (en) * | 2020-10-22 | 2021-01-22 | 邱玲玲 | Blackboard curtain type easy-to-clean blackboard |
| CN112549824A (en) * | 2020-12-23 | 2021-03-26 | 常州纺织服装职业技术学院 | Blackboard capable of being automatically cleaned |
| CN113733787A (en) * | 2021-08-12 | 2021-12-03 | 江苏盛翔电子科技有限公司 | Multilayer combined type auxiliary screen blackboard |
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Granted publication date: 20190830 Termination date: 20201218 |