CN2075594U - Automatic mark-eliminating blackboard - Google Patents
Automatic mark-eliminating blackboard Download PDFInfo
- Publication number
- CN2075594U CN2075594U CN 90219054 CN90219054U CN2075594U CN 2075594 U CN2075594 U CN 2075594U CN 90219054 CN90219054 CN 90219054 CN 90219054 U CN90219054 U CN 90219054U CN 2075594 U CN2075594 U CN 2075594U
- Authority
- CN
- China
- Prior art keywords
- blackboard
- blackboard surface
- drive roll
- eraser
- blackboard eraser
- 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.)
- Withdrawn
Links
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 4
- 239000000428 dust Substances 0.000 abstract description 7
- 239000004033 plastic Substances 0.000 abstract description 3
- 229920003023 plastic Polymers 0.000 abstract description 3
- 238000003915 air pollution Methods 0.000 abstract description 2
- 239000002649 leather substitute Substances 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000005338 frosted glass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
An automatic mark-erasing blackboard belonging to teaching tools is characterized in that when a blackboard surface (5) moves through a motor (3), a worm reducer (2), a driving roller (1) and a driven roller (6), the blackboard surface is rubbed with blackboard erasers on the left side and the right side, so that chalk marks on the blackboard surface are automatically erased. The blackboard surface is made of a rubber plate or a thin metal plate, and can also be made of synthetic leather or a plastic plate. The utility model discloses replace existing blackboard after, can eliminate the chalk vestige automatically, save the time of artifical blackboard of wiping, alleviate intensity of labour, prevent that the dust from flying upward, avoid air pollution, improve sanitary conditions, promote teachers and students healthy.
Description
The utility model belongs to a kind of improvement of teaching aid blackboard.
Used blackboard for education is fixed at present, and its material is plank, cement or frosted glass etc.Above blackboard needs to take blackboard eraser that chalk trace is wiped with hand when disappearing trace, thus dust from flying, contaminated environment, unhealthful, though at present used dust absorption blackboard eraser can dust suction, can not save time of erasing the board and reduce labor intensity.
The purpose of this utility model is, overcomes the shortcoming of above-mentioned blackboard, makes its trace that disappears automatically.
Solution of the present utility model is: drive drive roll (1) rotation by motor (3) by worm reducer (2), drive roll (1) and driven voller (6) are installed on the interior left and right sides of blackboard frame (4), blackboard surface (5) tightly is enclosed within drive roll and driven voller outside, its tensile force is adjusted by plate face elasticity bolt (7), can drive blackboard surface when making the drive roll rotation and move.In the outside of two ends, left and right sides blackboard surface, two blackboard erasers (8) respectively are housed, and adjust its contact force by blackboard eraser slack adjuster (9), when blackboard surface is moved and the frictional force of blackboard eraser be advisable to wipe chalk trace.Blackboard eraser is covered by blackboard eraser cover plate (10), prevents dust from flying, and dust is wiped and fallen behind, and the Chu Chenkong through transferring (12) is collected in the container.When not having electricity, the available hand rocking handle (11) of starting by belt transmission, makes the drive roll rotation drive blackboard surface and moves.
Blackboard surface (5) is closed endless belt, and its girth is 2.1 times of blackboard surface length, and the endless belt width is the height of blackboard surface just.Blackboard surface is made by rubber slab or thin metal plate through special processing, also can be made by synthetic leather or plastic plate through special processing.
Blackboard eraser (8) is made by timber and pig hair, and also available bamboo chip, plastics and felt are made.Its length equates that with the height of blackboard surface shape is cuboid or cylinder.
Advantage of the present utility model is that blackboard surface (5) can be eliminated the vestige of chalk automatically in moving process, saved the time that manually erases the board, reduce labor intensity, prevent dust from flying, avoid air pollution, the condition of improving environmental sanitation promotes that teachers and students are healthy.
Description of drawings is as follows:
Figure is the structural representation of trace blackboard of disappearing automatically.The 1-drive roll, 2-worm reducer, 3-motor, 4-blackboard frame, 5-blackboard surface, 6-driven voller, 7-plate face elasticity bolt, 8-blackboard eraser, 9-blackboard eraser slack adjuster, 10-blackboard eraser cover plate, 11-wind, 12-storage dirt hole.
Claims (1)
- A kind of trace blackboard that disappears automatically that belongs to teaching aid is made of blackboard frame (4), drive roll (1), driven voller (6), blackboard surface (5), blackboard eraser (8), plate face elasticity bolt (7), blackboard eraser slack adjuster (9), blackboard eraser cover plate (10), motor (3), worm reducer (2), wind (11).It is characterized in that, said drive roll and driven voller are installed on the left and right sides in the blackboard frame, said blackboard surface tightly is enclosed within drive roll and driven voller outside, the drive blackboard surface moves when making the drive roll rotation, said blackboard eraser is installed within the blackboard eraser cover plate in the outside about blackboard surface, and contacts with blackboard surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90219054 CN2075594U (en) | 1990-09-13 | 1990-09-13 | Automatic mark-eliminating blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90219054 CN2075594U (en) | 1990-09-13 | 1990-09-13 | Automatic mark-eliminating blackboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2075594U true CN2075594U (en) | 1991-04-24 |
Family
ID=4897781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90219054 Withdrawn CN2075594U (en) | 1990-09-13 | 1990-09-13 | Automatic mark-eliminating blackboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2075594U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103253046A (en) * | 2013-05-24 | 2013-08-21 | 东北大学 | Wet-type and dust-free blackboard cleaner |
| CN104070893A (en) * | 2014-06-26 | 2014-10-01 | 绍兴文理学院 | Rotation type automatic erasure blackboard based on high temperature vanishing pen |
-
1990
- 1990-09-13 CN CN 90219054 patent/CN2075594U/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103253046A (en) * | 2013-05-24 | 2013-08-21 | 东北大学 | Wet-type and dust-free blackboard cleaner |
| CN103253046B (en) * | 2013-05-24 | 2015-01-28 | 东北大学 | Wet-type and dust-free blackboard cleaner |
| CN104070893A (en) * | 2014-06-26 | 2014-10-01 | 绍兴文理学院 | Rotation type automatic erasure blackboard based on high temperature vanishing pen |
| CN104070893B (en) * | 2014-06-26 | 2016-02-17 | 绍兴文理学院 | A kind of rotary auto-erasing blackboard using high temperature disappearance pen |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |