CN2142401Y - Dust-removing blackboard eraser - Google Patents
Dust-removing blackboard eraser Download PDFInfo
- Publication number
- CN2142401Y CN2142401Y CN 92204966 CN92204966U CN2142401Y CN 2142401 Y CN2142401 Y CN 2142401Y CN 92204966 CN92204966 CN 92204966 CN 92204966 U CN92204966 U CN 92204966U CN 2142401 Y CN2142401 Y CN 2142401Y
- Authority
- CN
- China
- Prior art keywords
- wiping
- board
- dust
- erasure
- face
- 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
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- Drawing Aids And Blackboards (AREA)
Abstract
The utility model relates to a dust-removing blackboard eraser which belongs to a teaching aid, comprising an erasure surface and a box-shaped erasure board which is provided with grooves or holes, wherein, the erasure surface is made of chemistry materials with favorable dust absorption performances. During a blackboard is erased, powder dust is gradually moved to one side of the erasure board and entered into the box-shaped erasure board through the grooves or the holes on the erasure board, which solves the problem that the flying of chalk dust harms a teacher when the teacher erases the blackboard in a teaching process. The utility model has the advantages of simple structure, low cost, rub resistance, washable performance, favorable dust absorption effect, convenient operation, etc.
Description
The utility model belongs to a kind of teaching aid.
At present, the blackboard eraser that teaching is used, majority is to adopt to paste felt thing formation on the plank, after in use dust is wiped, fly upward everywhere, molecule is very easily sucked by the people, has a strong impact on teacher's physical and mental health, the student also in various degree influenced by it, be badly in need of a kind of blackboard eraser that reduces the dust device.From known data searching, existing several dust-free black board erasers, example: application number be 90213334.9 and application number be 88210514.0 utility model patent, the dust-free black board eraser that provides, its complex structure, the cost height, fragile, dustless effect is desirable not to the utmost, and all is to adopt felt or bafta to do wiping face, after smearing wiping, it is more to adhere to dust on the wiping face.Even this product also is difficult to see on market.
The purpose of this utility model is a kind of novel dust-free black board eraser of design, and it can be absorbed a large amount of dust, reduces the dust diffusion, favourable teacher's physical and mental health.
Basic design of the present utility model is to adopt the well behaved chemical material of novel dust suction to do wiping face, stick on around the wiping face with a kind of inhomogeneous chemical material or elastomeric material, wiping face is bonded on the wiping board, offer several grooves or hole on the wiping board of wiping board and the face of wiping contact position, " U " type groove is offered in wiping face one side and wiping board groove corresponding position, and there is the backplate that is lower than the wiping face thickness at wiping board proximal edge place, and it is the box type that wiping board constitutes, can open, remove the dust that sucks.
Characteristics of the present utility model have simple in structure, and cost is low, and wear-resisting wiping can be washed, and dust suction usefulness is good, and is easy to process etc.
Be structure principle chart of the present utility model in the accompanying drawing 1: wherein 1 is wiping face, the 2nd, and wiping face sheath, the 3rd, wiping face backplate, the 4th, " U " type groove on the wiping face, the 5th, groove or hole on the wiping board, the 6, the 7th, box type wiping board.
Be one of the present utility model below and execute example:
As shown in accompanying drawing 1, adopt light body polyurethane foam to do rectangle and wipe face 1, thickness is about 2 centimetres, sticks materials such as low bubble or rubber as sheath around wiping face 1.Have several grooves or hole on the wiping board of wiping face 1 and box type wiping board 6 contact positions, it is corresponding with groove on the wiping board to have several " U " type grooves in wiping face one side, dust enters in the box type wiping board 6,7 by groove or hole and stores, and there is the backplate 3 that is lower than the wiping face thickness at box type wiping board 6 proximal edge places.Wiping board is formed by two and half boxes (6,7) engagement, and thickness is about 1 centimetre, can open, and removes the dust that sucks.
Claims (2)
1, a kind of teaching aid of forming by wiping face and wiping board, it is characterized in that having several grooves or hole on the wiping board of wiping face and wiping board contact position, it is corresponding with the wiping board groove that wiping face one side has several " U " type grooves, and wiping board proximal edge place has and is lower than the backplate of wiping face thickness, wiping board case type structures.
2, teaching aid according to claim 1 is characterized in that wiping board is formed by two rectangular half box engagements of same thickness, can open.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92204966 CN2142401Y (en) | 1992-03-25 | 1992-03-25 | Dust-removing blackboard eraser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92204966 CN2142401Y (en) | 1992-03-25 | 1992-03-25 | Dust-removing blackboard eraser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2142401Y true CN2142401Y (en) | 1993-09-22 |
Family
ID=33761701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92204966 Expired - Fee Related CN2142401Y (en) | 1992-03-25 | 1992-03-25 | Dust-removing blackboard eraser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2142401Y (en) |
-
1992
- 1992-03-25 CN CN 92204966 patent/CN2142401Y/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 |