CN208232653U - A kind of roller auto-erasing blackboard device - Google Patents
A kind of roller auto-erasing blackboard device Download PDFInfo
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- CN208232653U CN208232653U CN201820466244.2U CN201820466244U CN208232653U CN 208232653 U CN208232653 U CN 208232653U CN 201820466244 U CN201820466244 U CN 201820466244U CN 208232653 U CN208232653 U CN 208232653U
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- blackboard
- roller
- erasing
- support frame
- fixed
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Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
The utility model discloses a kind of roller auto-erasing blackboard devices, including blackboard main body and support frame, blackboard erasing apparatus, bevel gear transmission, track cam transmission mechanism；Wherein bevel gear transmission is mounted on blackboard main body and support frame side, for driving batten plate face in blackboard main body and support frame, fixed batten lining cloth to move together；Track cam transmission mechanism is mounted on blackboard main body and support frame side, for realizing the movement of the blackboard erasing roller in blackboard erasing apparatus, realizes erasing by the movement that blackboard wipes movement cooperation the batten plate face, fixed batten lining cloth of roller.The utility model realizes the multifreedom motion of blackboard erasing roller, achievees the effect that erasing best, to achieve the effect that auto-erasing；The powder formed when can operate to blackboard auto-erasing roller effectively controls.
Description
Technical field
The utility model relates to a kind of roller auto-erasing blackboard devices, belong to teaching equipment field.
Background technique
Classroom is the place of our daily learning life, classroom all we can all have very deep emotion, especially often
Teacher is helped to impart to the blackboard of our knowledge day.But this can not cover the deficiency of blackboard design, most blackboard is set
Meter is followed the beaten track, impersonalityization design, in fact, the design of blackboard is be related to teaching and learning effect one whether reasonable
A key factor, the mistake design of blackboard or inappropriate configuration, bring the physical and mental health of academics and students very important
It influences.Blackboard is referred to, chalk of being impelled to speak, but the harm of chalk powder is very big:
One, to the harm of lung: after sucking lung, being delayed in alveolar, inflammation in respiratory system and pulmonary ventilation function decline.
Two, to the harm of the upper respiratory tract: during chalk dust enters lung, part dust can stay in the upper respiratory tract,
Mechanical stimulus and damage are generated to mucomembranous epithelial cell.
Three, the harm of eyes: chalk dust is fallen into eye, stimulates lacrimal secretion, and tears hydrolyze carbonic acid and generate basic species
Matter causes mucosa injury, forms chronic inflammation.
Three, to the harm of skin: to the irritating effect of skin membrane, serious person can cause acne, epifolliculitis, pyoderma, skin
Skin chap and a large amount of trichomadesis influence and disturb teacher's normal work and life.
Four, to the harm of ear: being mixed in sebum, ceruminal plug can be formed, if long-term in this way, the hair of ear inflammation can be caused
It is raw.
Five, the content of cadmium metal is higher among the composition of chalk, and after cadmium is sucked by human body, major storage is in liver, kidney, bone group
Obvious to these histologic lesions in knitting, cadmium is also one of the metallic element for most easily leading to cancer simultaneously.
We are unable to auto-erasing chalk powder at present blackboard, give lessons in teacher, classmates erase the board during all
The excessive very few sucking chalk powder of meeting, this thing are inevitable.Especially teacher, eating chalk powder almost becomes teacher's duty
The synonym of industry.Due to sucking fine dusts throughout the year, the disease incidence of teacher's pulmonary emphysema is 5 times of ordinary person.Long-term and blackboard chalk
It comes into contacts with, the chalk powder of sucking is several times of ordinary person, is highly detrimental to the health of teachers.
Summary of the invention
In order to solve the deficiencies in the prior art, the utility model provides a kind of roller auto-erasing blackboard device.
The technical solution of the utility model is: a kind of roller auto-erasing blackboard device, including blackboard main body and support
Frame, blackboard erasing apparatus, bevel gear transmission, track cam transmission mechanism；Wherein bevel gear transmission is mounted on blackboard
Main body and support frame side, for driving batten plate face 1 in blackboard main body and support frame, fixed batten lining cloth 2 to move together；
Track cam transmission mechanism is mounted on blackboard main body and support frame side, wipes rolling for realizing the blackboard in blackboard erasing apparatus
The movement of column 16 realizes erasing by the movement that blackboard wipes movement cooperation the batten plate face 1, fixed batten lining cloth 2 of roller 16.
The blackboard main body and support frame include batten plate face 1, fixed batten lining cloth 2, plate face support frame 3, plate face support
Plate 4, main support both arms 5, polygon roller fixation hole 7 and blackboard wipe roller fixation hole 8；Wherein batten plate face 1 passes through fixation
Batten lining cloth 2 fits together, and plate face support plate 4 is fixed on plate face support frame 3 to batten plate face 1 and fixed batten lining cloth 2
It plays a supportive role, plate face support frame 3 is fixed on main support both arms 5, and polygon roller fixation hole 7, blackboard erasing roller are fixed
Hole 8 is arranged on main support both arms 5, and polygon roller fixation hole 7 is used to install the polygon roller in bevel gear transmission
23, blackboard erasing roller fixation hole 8 is used to install the blackboard erasing roller 16 in blackboard erasing apparatus.
The blackboard erasing apparatus includes blackboard erasing roller axle 6, erasing roller return spring 14, blackboard erasing roller 16
With idler wheel fixing device for installing 17；Wherein erasing roller return spring 14 is mounted on the blackboard erasing of blackboard erasing 16 side of roller
In roller axle 6 and it is located between the main support both arms 5 in side that blackboard is wiped in roller 16 and blackboard main body and support frame, blackboard eraser
It wipes roller axle 6 by blackboard except roller 16 to be mounted on main support both arms 5, idler wheel fixing device for installing 17 is mounted on blackboard eraser
Except the main support both arms 5 in the other side in the blackboard erasing roller axle 6 of 16 other side of roller and in blackboard main body and support frame
Outside, idler wheel fixing device for installing 17 be used to install with the idler wheel 19 in track cam transmission mechanism, be driven by cam rail
The movement of mechanism drives the movement of blackboard erasing roller 16 to realize that blackboard wipes function.
It further include chalk powder anti-splashing collection device, the chalk powder anti-splashing collection device includes that chalk powder is received
Collection slot dismounting key 9 prevents chalk powder splashing shutter 11, chalk powder collecting tank 12 and chalk powder anti-splashing and collects dress
Set dismounting hole 13；The chalk powder that wherein chalk powder collecting tank dismounting key 9 is used to install and remove in blackboard erasing apparatus is received
Collect slot 12, chalk powder splashing shutter 11 is prevented to be fixed on chalk powder collecting tank 12, chalk powder collecting tank dismounts hole
13 combine with chalk powder collecting tank dismounting key 9, and the chalk powder realizing installation and removing in blackboard main body and support frame is received
Collect slot 12.
The bevel gear transmission include motor I 10, I fixed frame 15 of motor, polygon roller 23, from mantle tooth
Wheel 24 and drive bevel gear 25；Wherein polygon roller 23 passes through the polygon roller fixation hole 7 in blackboard main body and support frame
It is mounted on the main support both arms 5 in blackboard main body and support frame, I fixed frame 15 of motor is mounted on main support both arms 5, is led to
Crossing the fixed motor I 10 of I fixed frame 15 of motor drives drive bevel gear 25 to rotate, the rotation of drive bevel gear 25 drive from
To drive the rotation of polygon roller 23, the rotation of polygon roller 23 drives blackboard main body and branch for the rotation of dynamic bevel gear 24
Batten plate face 1, fixed batten lining cloth 2 in support move together.
The width on 23 side of polygon roller is equal to each batten width of batten plate face 1.
The track cam transmission mechanism includes roll fixed shaft 18, idler wheel 19, track cam 20, motor II 21 and electricity
II fixed frame 22 of motivation；Wherein idler wheel 19 is mounted on the fixed dress of the installation of the idler wheel in blackboard erasing apparatus by roll fixed shaft 18
It sets on 17, II fixed frame 22 of motor is mounted on the main support both arms 5 in blackboard main body and support frame, solid by motor II
Determining the fixed motor II 21 of frame 22 drives track cam 20 to rotate, and the rotation of track cam 20 drives the rotation of idler wheel 19, warp
The movement of blackboard erasing roller 16 in blackboard erasing apparatus is realized in the transmission for crossing idler wheel 19.
The both sides of the track cam 20 are equipped with protrusion, for preventing idler wheel 19 from de-orbiting cam 20.
The beneficial effects of the utility model are:
1, because the blackboard rolls form, greatly improving using area for the blackboard can be made, than same homalographic
Normal blackboard increases one times of usable floor area.
2, by bevel gear and shape changeable roller drive, the effect for being equivalent to linked transmission may be implemented, motor is just
Reversion, the erasing of plate face may be implemented and review, when to be wiped, plate face is rotated down, when to retain to next time look back then to
The reading model of e-book is imitated in upper rotation, effectively improves the learning and memory efficiency of student.
3, it by the transmission of track cam and idler wheel, realizes the multifreedom motion of blackboard erasing roller, reaches erasing
Best effect makes teacher and student no longer endure chalk powder splashing and goes to black to achieve the effect that auto-erasing
The worry of plate is effectively protected to the health of academics and students.
4, by chalk powder anti-splashing collection device, auto-erasing function is made to obtain more perfect optimization, to blackboard
The powder that auto-erasing roller is formed when operating effectively controls, and prevents it from splashing and arbitrarily falling, and then effectively improves
Practise environment.
Detailed description of the invention
Fig. 1 is the utility model overall structure diagram；
Fig. 2 be the utility model blackboard main body and main support arm structure schematic diagram；
Fig. 3 is the blackboard panel interior shelf structural schematic diagram of the utility model；
Fig. 4 is the chalk powder anti-splashing collection device schematic diagram of the utility model；
Fig. 5 is the blackboard auto-erasing roller structure schematic diagram of the utility model；
Fig. 6 is the track cam transmission mechanism schematic diagram of the utility model；
Fig. 7 is the bevel gear and polygon roller drive structural scheme of mechanism of the utility model；
Fig. 8 is the blackboard auto-erasing structural scheme of mechanism of the utility model；
Each label in figure are as follows: 1- batten plate face, 2- fixed batten lining cloth, 3- plate face support frame, 4- plate face support plate, 5- master
Both arms, 6- blackboard erasing roller axle, 7- polygon roller fixation hole, 8- blackboard is supported to wipe roller fixation hole, 9- chalk powder
Collecting tank dismounting key, 10- motor I, 11- prevent chalk powder splashing shutter, 12- chalk powder collecting tank, 13- chalk powder
Last anti-splashing and collection device dismounting hole, 14- erasing roller return spring, I fixed frame of 15- motor, the erasing rolling of 16- blackboard
Column, 17- idler wheel fixing device for installing, 18- roll fixed shaft, 19- idler wheel, 20- track cam, 21- motor II, 22- are electronic
II fixed frame of machine, 23- polygon roller, 24- driven wheel of differential, 25- drive bevel gear.
Specific embodiment
Embodiment 1: as Figure 1-Figure 8, a kind of roller auto-erasing blackboard device, including blackboard main body and support
Frame, blackboard erasing apparatus, bevel gear transmission, track cam transmission mechanism；Wherein bevel gear transmission is mounted on blackboard
Main body and support frame side, for driving batten plate face 1 in blackboard main body and support frame, fixed batten lining cloth 2 to move together；
Track cam transmission mechanism is mounted on blackboard main body and support frame side, wipes rolling for realizing the blackboard in blackboard erasing apparatus
The movement of column 16 realizes erasing by the movement that blackboard wipes movement cooperation the batten plate face 1, fixed batten lining cloth 2 of roller 16.
It is possible to further the blackboard main body be arranged and support frame includes batten plate face 1, fixed batten lining cloth 2, plate face
Support frame 3, plate face support plate 4, main support both arms 5, polygon roller fixation hole 7 and blackboard wipe roller fixation hole 8；It is wherein wooden
Batten surface 1 passes through fixed batten lining cloth 2 and fits together, and plate face support plate 4 is fixed on plate face support frame 3 to batten plate face 1
It plays a supportive role with fixed batten lining cloth 2, plate face support frame 3 is fixed on main support both arms 5, polygon roller fixation hole 7, black
Blackboard eraser is arranged on main support both arms 5 except roller fixation hole 8, and polygon roller fixation hole 7 is used to install bevel gear transmission
In polygon roller 23, blackboard erasing roller fixation hole 8 be used to install in blackboard erasing apparatus blackboard erasing roller 16.
It include blackboard erasing roller axle 6, erasing roller return spring it is possible to further which the blackboard erasing apparatus is arranged
14, blackboard erasing roller 16 and idler wheel fixing device for installing 17；Wherein erasing roller return spring 14 is mounted on blackboard erasing rolling
In the blackboard erasing roller axle 6 of 16 side of column and it is located at blackboard erasing roller 16 and the main branch in side in blackboard main body and support frame
It supports between both arms 5, blackboard is wiped roller 16 and is mounted on main support both arms 5 by blackboard erasing roller axle 6, and idler wheel installation is fixed
Device 17 is mounted in the blackboard erasing roller axle 6 of blackboard erasing 16 other side of roller and is located in blackboard main body and support frame
5 outside of the main support both arms in the other side, idler wheel fixing device for installing 17 be used to install with the idler wheel 19 in track cam transmission mechanism,
Realize that blackboard wipes function by the movement that the movement of cam rail transmission mechanism drives blackboard to wipe roller 16.
It further include chalk powder anti-splashing collection device it is possible to further be arranged, the chalk powder anti-splashing is collected
Device includes chalk powder collecting tank dismounting key 9, prevents chalk powder splashing shutter 11, chalk powder collecting tank 12 and chalk
Powder anti-splashing and collection device dismount hole 13；Wherein chalk powder collecting tank dismounting key 9 is used to install and remove blackboard erasing
Chalk powder collecting tank 12(in device can remove the powder collecting tank 12 after over time and be cleared up), prevent chalk
Powder splashing shutter 11 is fixed on chalk powder collecting tank 12, and chalk powder collecting tank dismounts hole 13 and chalk powder is collected
Slot dismounting key 9 combines, and realizes installation and removes the chalk powder collecting tank 12 in blackboard main body and support frame.
It include motor I 10 it is possible to further which the bevel gear transmission is arranged, I fixed frame 15 of motor, polygon
Shape roller 23, driven wheel of differential 24 and drive bevel gear 25；Wherein polygon roller 23 passes through in blackboard main body and support frame
Polygon roller fixation hole 7 is mounted on the main support both arms 5 in blackboard main body and support frame, the installation of I fixed frame 15 of motor
On main support both arms 5, drive bevel gear 25 is driven to rotate by the fixed motor I 10 of I fixed frame 15 of motor, initiative taper
The rotation of gear 25 drives the rotation of driven wheel of differential 24 to drive the rotation of polygon roller 23, and polygon roller 23 turns
It is dynamic that blackboard main body and the batten plate face 1 in support frame, fixed batten lining cloth 2 is driven to move together.
It is possible to further which each batten width that the width on 23 side of polygon roller is equal to batten plate face 1 is arranged.
It include roll fixed shaft 18, idler wheel 19, track cam it is possible to further which the track cam transmission mechanism is arranged
20, II fixed frame 22 of motor II 21 and motor；Wherein idler wheel 19 is mounted on blackboard erasing apparatus by roll fixed shaft 18
In idler wheel fixing device for installing 17 on, II fixed frame 22 of motor is mounted on the main support both arms in blackboard main body and support frame
On 5, track cam 20 is driven to rotate by the fixed motor II 21 of II fixed frame 22 of motor, the rotation band of track cam 20
The movement of blackboard erasing roller 16 in blackboard erasing apparatus is realized in the rotation of dynamic idler wheel 19 by the transmission of idler wheel 19.
It is equipped with protrusion it is possible to further which the both sides of the track cam 20 are arranged, for preventing idler wheel 19 from de-orbiting
Cam 20.
The course of work of the utility model is:
Chalk powder splashing shutter 11 is prevented to be fixed on chalk powder collecting tank 12, when blackboard erasing roller operation
Chalk powder can be effectively prevent to splash, and play the role of preferable powder mobile phone；Chalk powder collecting tank dismounts hole 13 and powder
Powder collecting tank dismounting key 9 combines, and realizes the anti-splashing and collecting function of chalk powder；Roller return spring 14 is wiped to pacify
In the blackboard erasing roller axle 6 of blackboard erasing 16 side of roller and it is located at blackboard erasing roller 16 and blackboard main body and support
Between the main support both arms 5 in side in frame；Blackboard wipes roller 16 and is mounted on main support pair by blackboard erasing roller fixation hole 8
On arm 5, realize that blackboard wipes function by the movement that blackboard wipes roller 16；Idler wheel fixing device for installing 17 be used to install with it is convex
The idler wheel 19 that wheel track transmission mechanism 4 engages, idler wheel 19 are mounted on idler wheel fixing device for installing 17 by roll fixed shaft 18,
Kinetic energy is transmitted to track cam 20 by motor II 21, is realized by the transmission for rotating through idler wheel 19 of track cam 20 black
Blackboard eraser removes the movement of roller 16.
Motor I 10 is the major impetus source of batten plate face 1, and motor I 10 is rotated by drive drive bevel gear 25,
The rotation of polygon roller 23 is driven by the rotation of driven wheel of differential 24, and because the width on polygon roller side is equal to
Each batten width of batten plate face 1, to realize the rotation of batten plate face.
Motor I 10 is the major impetus source of blackboard erasing roller 16, and motor I 10 is by driving 20 turns of track cam
It is dynamic, the rotation of idler wheel 19 is driven by the rotation of track cam 20, while working as cam by idler wheel fixing device for installing 17
It drives blackboard erasing roller 16 to move downward when rotation, wipes roller return spring 14 at the same time and compressed, so that power is stored, when
When cam continues to rotate, 14 releases its force of roller return spring is wiped, realizes that blackboard erasing roller 16 moves right；Again because of rail
Track on road cam 20, when 19 orbital motion of idler wheel, the direction of idler wheel 19 changes, so that blackboard erasing rolling
Column 16 realizes moving by a small margin back and forth in rotary freedom direction；The kick on the both sides of track cam 20, which is played, prevents idler wheel
19 are detached from the effect of cam；By the transmission of track cam 20 and idler wheel 19, blackboard erasing roller 16 is finally realized at two
The movement of freedom degree direction drives the cooperation batten plate face such as flannelette/sponge thereon by the movement that blackboard wipes roller 16
1, erasing is realized in the movement of fixed batten lining cloth 2.
The specific embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the utility model is not
Be limited to above embodiment, within the knowledge of a person skilled in the art, can also do not depart from it is practical
Various changes can be made under the premise of novel objective.
Claims (8)
1. a kind of roller auto-erasing blackboard device, it is characterised in that: including blackboard main body and support frame, blackboard erasing dress
It sets, bevel gear transmission, track cam transmission mechanism；Wherein bevel gear transmission is mounted on blackboard main body and support frame side
Face, for driving batten plate face (1) in blackboard main body and support frame, fixed batten lining cloth (2) to move together；Track cam passes
Motivation structure is mounted on blackboard main body and support frame side, for realizing the fortune of blackboard erasing roller (16) in blackboard erasing apparatus
It is dynamic, erasing is realized by the movement of movement cooperation batten plate face (1) of blackboard erasing roller (16), fixed batten lining cloth (2).
2. roller auto-erasing blackboard device according to claim 1, it is characterised in that: the blackboard main body and support
Frame include batten plate face (1), fixed batten lining cloth (2), plate face support frame (3), plate face support plate (4), main support both arms (5),
Polygon roller fixation hole (7) and blackboard erasing roller fixation hole (8)；Wherein batten plate face (1) passes through fixed batten lining cloth (2)
It fits together, plate face support plate (4), which is fixed on plate face support frame (3), plays batten plate face (1) and fixed batten lining cloth (2)
Supporting role, plate face support frame (3) are fixed on main support both arms (5), and polygon roller fixation hole (7), blackboard wipe roller
Fixation hole (8) is arranged on main support both arms (5), and polygon roller fixation hole (7) is used to install in bevel gear transmission
Polygon roller (23), blackboard erasing roller fixation hole (8) are used to install blackboard erasing roller (16) in blackboard erasing apparatus.
3. roller auto-erasing blackboard device according to claim 1, it is characterised in that: the blackboard erasing apparatus packet
Include blackboard erasing roller axle (6), erasing roller return spring (14), blackboard erasing roller (16) and idler wheel fixing device for installing
(17)；Wherein erasing roller return spring (14) is mounted in blackboard erasing roller axle (6) of blackboard erasing roller (16) side
And it is located between the main support both arms (5) in side in blackboard erasing roller (16) and blackboard main body and support frame, blackboard erasing rolling
Column (16) is mounted on main support both arms (5) by blackboard erasing roller axle (6), and idler wheel fixing device for installing (17) is mounted on black
Blackboard eraser is except the main branch in the other side in blackboard erasing roller axle (6) of roller (16) other side and in blackboard main body and support frame
Support both arms (5) on the outside of, idler wheel fixing device for installing (17) be used to install with the idler wheel (19) in track cam transmission mechanism, pass through
The movement of cam rail transmission mechanism drives the movement of blackboard erasing roller (16) to realize that blackboard wipes function.
4. roller auto-erasing blackboard device according to claim 3, it is characterised in that: further including that chalk powder is anti-flies
Collection device is splashed, the chalk powder anti-splashing collection device includes chalk powder collecting tank dismounting key (9), prevents chalk powder
Splashing shutter (11), chalk powder collecting tank (12) and chalk powder anti-splashing and collection device dismounting hole (13)；Wherein powder
Powder collecting tank dismounting key (9) is used to install and remove the chalk powder collecting tank (12) in blackboard erasing apparatus, prevents powder
Powder splashing shutter (11) is fixed on chalk powder collecting tank (12), and chalk powder collecting tank dismounts hole (13) and chalk
Powder collecting tank dismounting key (9) combines, and realizes installation and removes the chalk powder collecting tank in blackboard main body and support frame
(12).
5. roller auto-erasing blackboard device according to claim 1, it is characterised in that: the bevel gear transmission
Including motor I (10), I fixed frame of motor (15), polygon roller (23), driven wheel of differential (24) and drive bevel gear
(25)；Wherein polygon roller (23) is mounted on blackboard by the polygon roller fixation hole (7) in blackboard main body and support frame
On main support both arms (5) in main body and support frame, I fixed frame of motor (15) is mounted on main support both arms (5), passes through electricity
The fixed motor I (10) of I fixed frame of motivation (15) drives drive bevel gear (25) rotation, the rotation band of drive bevel gear (25)
To drive the rotation of polygon roller (23), the rotation of polygon roller (23) drives black for the rotation of dynamic driven wheel of differential (24)
Batten plate face (1), fixed batten lining cloth (2) in plate main body and support frame move together.
6. roller auto-erasing blackboard device according to claim 5, it is characterised in that: the polygon roller (23)
The width on side is equal to each batten width of batten plate face (1).
7. roller auto-erasing blackboard device according to claim 1, it is characterised in that: the track cam driver
Structure includes roll fixed shaft (18), idler wheel (19), track cam (20), motor II (21) and II fixed frame of motor (22)；
Wherein idler wheel (19) is mounted on the idler wheel fixing device for installing (17) in blackboard erasing apparatus by roll fixed shaft (18), electricity
II fixed frame of motivation (22) is mounted on the main support both arms (5) in blackboard main body and support frame, passes through II fixed frame of motor
(22) fixed motor II (21) drives track cam (20) rotation, and the rotation of track cam (20) drives turning for idler wheel (19)
It is dynamic, the movement of blackboard erasing roller (16) in blackboard erasing apparatus is realized by the transmission of idler wheel (19).
8. roller auto-erasing blackboard device according to claim 7, it is characterised in that: the track cam (20)
Both sides are equipped with protrusion, for preventing idler wheel (19) from de-orbiting cam (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820466244.2U CN208232653U (en) | 2018-04-04 | 2018-04-04 | A kind of roller auto-erasing blackboard device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820466244.2U CN208232653U (en) | 2018-04-04 | 2018-04-04 | A kind of roller auto-erasing blackboard device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208232653U true CN208232653U (en) | 2018-12-14 |
Family
ID=64586287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820466244.2U Expired - Fee Related CN208232653U (en) | 2018-04-04 | 2018-04-04 | A kind of roller auto-erasing blackboard device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208232653U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108437662A (en) * | 2018-04-04 | 2018-08-24 | 昆明理工大学 | A kind of roller auto-erasing blackboard device |
-
2018
- 2018-04-04 CN CN201820466244.2U patent/CN208232653U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108437662A (en) * | 2018-04-04 | 2018-08-24 | 昆明理工大学 | A kind of roller auto-erasing blackboard device |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20181214 Termination date: 20200404 |