CN2286110Y - Dustproof-blackboard eraser - Google Patents
Dustproof-blackboard eraser Download PDFInfo
- Publication number
- CN2286110Y CN2286110Y CN 96245483 CN96245483U CN2286110Y CN 2286110 Y CN2286110 Y CN 2286110Y CN 96245483 CN96245483 CN 96245483 CN 96245483 U CN96245483 U CN 96245483U CN 2286110 Y CN2286110 Y CN 2286110Y
- Authority
- CN
- China
- Prior art keywords
- felt
- blackboard
- blackboard eraser
- utility
- model
- 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
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- Drawing Aids And Blackboards (AREA)
Abstract
The utility model provides an improved blackboard eraser. The utility model can conveniently erase the blackboard and can effectively prevent the dust pollution caused by chalk dust. The utility model is composed of a wood board, felt and a dustproof cover. The height of the dustproof cover is the equal to the height of the wool felt. The dustproof cover and the wool felt can be contacted with the blackboard simultaneously. The chalk dust scraped by the wool felt is fallen in the dustproof cover when the blackboard is erased, and thereby, dust pollution is prevented.
Description
The utility model relates to a kind of improved blackboard eraser, particularly a kind of blackboard eraser that can prevent dust pollution.
The blackboard eraser of existing wiping letter written with chalk, mainly constitute by this plate and felt, felt is drawn together the letter written with chalk end when erasing the board, the chalk powder of being drawn together glues side and the bottom surface that floats over felt at first, the chalk powder of being drawn together when continuing to erase the board increases in a large number, felt can not be sticking floating with it, a large amount of chalk powders can only free-falling, and this simultaneously the move back and forth air-flow that produces of arm and blackboard eraser the chalk powder of free-falling is dispelled aloft, wherein a part of chalk powder is inhaled in the people's that erases the board the lung, a part descends slowly and lightly to people's body and near each corner the blackboard, has caused pollution to human body and environment.
The purpose of this utility model is that a kind of improved blackboard eraser will be provided, and it is blackboard wiping easily, can prevent the dust pollution that chalk powder causes effectively again.
The purpose of this utility model is achieved in that and adds a dust cover in the outside of blackboard eraser felt, the height of dust cover equates with the height of felt, it can touch blackboard simultaneously with felt, will fall in the dust cover when a large amount of like this chalk powders falls, the air-flow that arm and blackboard eraser motion produce blows less than the chalk powder that falls, thereby has prevented dust pollution
The utility model is compared with existing blackboard eraser, and it is convenient equally to use, and using method is identical, has just added a dust cover, and cost does not almost increase.
Below with reference to accompanying drawing the utility model is described in further detail.
Fig. 1 is an installation diagram of the present utility model.
With reference to Fig. 1, dust cover (3) can be by plastics or rubber manufacturing, its height equates with the height of felt (2), plank (1) by which kind of timber manufacturing can, need dry the processing for preventing wood deformation timber, will be by the intact plank (1) of drawing dimensioned, felt (2), the technological requirement of dust cover (3) tipping figure sticks with glue and is connected together, treat glue do after with plank surface mopping, a dust-proof blackboard eraser manufacturing is finished.
Claims (2)
1. one by plank (1), and the device for blackboard eraser that felt (2) is formed is characterized in that at the additional dust cover (3) in the outside of felt (2).
2. device according to claim 1 is characterized in that the height of dust cover (3) equates with the height of felt (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96245483 CN2286110Y (en) | 1996-11-05 | 1996-11-05 | Dustproof-blackboard eraser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96245483 CN2286110Y (en) | 1996-11-05 | 1996-11-05 | Dustproof-blackboard eraser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2286110Y true CN2286110Y (en) | 1998-07-15 |
Family
ID=33918521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96245483 Expired - Fee Related CN2286110Y (en) | 1996-11-05 | 1996-11-05 | Dustproof-blackboard eraser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2286110Y (en) |
-
1996
- 1996-11-05 CN CN 96245483 patent/CN2286110Y/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 |