CN2363895Y - Dustless blackboard - Google Patents
Dustless blackboard Download PDFInfo
- Publication number
- CN2363895Y CN2363895Y CN 99205655 CN99205655U CN2363895Y CN 2363895 Y CN2363895 Y CN 2363895Y CN 99205655 CN99205655 CN 99205655 CN 99205655 U CN99205655 U CN 99205655U CN 2363895 Y CN2363895 Y CN 2363895Y
- Authority
- CN
- China
- Prior art keywords
- blackboard
- dust
- annular belt
- teacher
- endless belt
- 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.)
- Expired - Fee Related
Links
Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
The utility model relates to a blackboard used in teaching. The writing surface of the blackboard is the surface of an annular belt. The blackboard is composed of an annular belt (1), a rotating shaft (2), a blackboard brush (3), a dust storing tank (4), etc. When the chalk writing on the surface of the annular belt facing to a teacher needs to be erased, the annular belt is driven by the rotating shaft to rotated in circulation. One side of the annular belt backing on to the teacher is contacted with the blackboard brush. The powder dust be erased by the blackboard brush falls into the dust storing tank. The utility model can purify the environment and maintain the teacher's health. In addition, the powder dust can be used again.
Description
The utility model relates to a kind of blackboard that is used for the teaching aid field.
At present, blackboard all is a rectangular planes.This blackboard can not go out in the teaching field merit, but also has many unsatisfactory parts.Such as, when wiping on the blackboard letter written with chalk, dust pollution environment, and allow teacher suck a large amount of dust.
The purpose of this utility model provides a kind of dust-free blackboard, thereby causes the shortcoming of dust when overcoming present blackboard and writing with chalk to environment.
The purpose of this utility model is achieved in that the agent structure of the endless belt of utilization sealing as blackboard.The width of this endless belt is with blackboard length is identical at present, and the appearance of endless belt is a writing surface.The inner surface of endless belt contacts with upper and lower each axle of one in the band.The rotating drive endless belt cycle rotation of axle.When the lip-deep letter written with chalk of teacher's endless belt need be erased, the endless belt of writing letter written with chalk is turned to teacher's one side dorsad.Endless belt dorsad teacher's one side have the device of brush and so on to contact with it, when endless belt rotated, this class device can be wiped the letter written with chalk of endless belt outer surface.The chalk dust of being wiped falls in the following dust storage groove.
The utility model can effectively be avoided the environmental pollution that causes because of flying upward of chalk, and the working environment of a health is provided for teacher.The dust of collecting in the dust groove can be utilized again makes chalk.The utility model adapts to the requirement of the development of society.
Below in conjunction with drawings and Examples the utility model is further specified.
The schematic diagram of a kind of embodiment of the utility model during Fig. 1.
Among the figure: 1. 2. 3. blackboard brush of endless belt, 4. dust grooves
Present embodiment provides a kind of dust-free blackboard device.It has endless belt (1) to be enclosed within on upper and lower two axles (2).The outer surface of endless belt (1) is a writing surface, and the front of endless belt (1) is towards teacher.The back side of endless belt (1) contacts with blackboard brush (3), and dust groove (4) is used for adorning the dust of being wiped by blackboard brush (3).
Claims (1)
1, a kind of blackboard, blackboard has writing surface, it is characterized in that: writing surface is the surface of endless belt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99205655 CN2363895Y (en) | 1999-03-18 | 1999-03-18 | Dustless blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99205655 CN2363895Y (en) | 1999-03-18 | 1999-03-18 | Dustless blackboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2363895Y true CN2363895Y (en) | 2000-02-16 |
Family
ID=34000162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99205655 Expired - Fee Related CN2363895Y (en) | 1999-03-18 | 1999-03-18 | Dustless blackboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2363895Y (en) |
-
1999
- 1999-03-18 CN CN 99205655 patent/CN2363895Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |