CN201357669Y - Static dust-free blackboard eraser - Google Patents
Static dust-free blackboard eraser Download PDFInfo
- Publication number
- CN201357669Y CN201357669Y CNU2009200076950U CN200920007695U CN201357669Y CN 201357669 Y CN201357669 Y CN 201357669Y CN U2009200076950 U CNU2009200076950 U CN U2009200076950U CN 200920007695 U CN200920007695 U CN 200920007695U CN 201357669 Y CN201357669 Y CN 201357669Y
- Authority
- CN
- China
- Prior art keywords
- base plate
- blackboard eraser
- dust
- bottom plate
- static
- 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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Abstract
The utility model discloses a static dust-free blackboard eraser, which aims to provide a blackboard eraser with simple structure, low manufacturing cost, convenient use, zero pollution and capability of preventing dust flying around. To achieve the above purposes, the technical scheme of the utility model includes that the static dust-free blackboard eraser consists of a bottom plate and bristles, the blackboard eraser is characterized in that the bottom plate is hollow, the bristles and dust inlets are arranged on the outer side of the upper surface of the bottom plate, projections are arranged on the inner side of the lower cavity of the bottom plate, and a baffle frame is connected with the bottom plate via an elastic device.
Description
Technical field
The utility model relates to a kind of teaching aid, relates in particular to a kind of static dust-free black board eraser.
Technical background
When using traditional blackboard eraser to erase the board, be easy to cause powder to fly upward, serious harm teacher and student's physical and mental health, electric dust absorption blackboard eraser had appearred afterwards, the situation of having avoided powder to fly upward, but owing to the cost of this dust absorption blackboard eraser than reasons such as higher, easy damages, never spread in the vast school and go.Also have a kind of fairly simple dust absorption blackboard eraser at present, its principle limits flowing of powder for the frame that blocks powder is set around blackboard eraser, but effect and not really desirable.Up to the present a kind of simple in structure, dust-free black board eraser that cost is low, effective does not appear as yet.
The utility model content
At many shortcomings of above-mentioned blackboard eraser, the utility model provides a kind of simple in structure, static dust-free black board eraser that cost is low, effective.
For solving the technical problem of above-mentioned existence, the utility model is achieved through the following technical solutions: the saying of summary, core concept of the present utility model is utilization blackboard eraser and the fricative static of blackboard, in powder China ink inspiration cavity, deposits to powder box at last.Be specially: a kind of static dust-free black board eraser, mainly constitute by base plate, retaining frame, bristle etc., be provided with an elastic device between base plate, the retaining frame, the retaining frame is made by the material of easy triboelectrification, is cavity in the middle of the base plate, bristle is equipped with on the upper strata, and be provided with powder inlet, and lower floor's internal memory is provided with some projectioies, and the retaining frame is connected by one section metal wire with base plate, the lower end of the utility model integral body is provided with a powder box of depositing powder, and a side of powder box can be buckled out.In the application process, when blackboard eraser was adjacent to blackboard, the retaining frame was drawn close to base plate, and bristle is pressed close to blackboard, the retaining frame blackboard that under the effect of elastic device, rubs all the time in the wiping process, play intercepting the effect that powder outwards flows, fricative static guides to base plate by lead, assembles on the projection of static in cavity, powder drops in the powder box under the effect of charge attraction power and gravity, after blackboard eraser is intact, renovating of powder box side opened, powder is poured out.
Blackboard eraser was compared in the past, and the beneficial effects of the utility model are: simple in structure, low cost of manufacture, energy-conserving and environment-protective, outstanding effect advantage.
Description of drawings
Fig. 1 is overall structure figure of the present utility model.
Fig. 2 is vertical planing surface figure of the present utility model.
Among the figure 1, the retaining frame, 2, bristle, 3, powder inlet, 4, powder box, 5, side door, 6, base plate, 7, elastic device, 8, projection, 9, metal wire.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
Referring to accompanying drawing 1, accompanying drawing 2, a kind of static dust-free black board eraser, mainly constitute by base plate 6, retaining frame 1, bristle 2 etc., be provided with an elastic device 7 between base plate 6, the retaining frame 1, retaining frame 1 is made by the material of easy triboelectrification, in the middle of the base plate 6 is cavity, bristle 2 is equipped with on the upper strata, and be provided with powder inlet 3, the lower floor inboard is provided with some protruding 8, and retaining frame 1 is connected by one section metal wire 9 with base plate 6, and the lower end of the utility model integral body is provided with a powder box 4 of depositing powder, one side of powder box 4 is provided with side door 5, and side door 5 is fixed on the powder box 4 by hinge.In the application process, when blackboard eraser was adjacent to blackboard, retaining frame 1 was drawn close to base plate, and bristle 2 is pressed close to blackboard, retaining frame 1 blackboard that under the effect of elastic device 7, rubs all the time in the wiping process, play intercepting the effect that powder outwards flows, fricative static guides to base plate 6 by metal wire 9, assembles on the projection 8 of static in cavity, powder drops in the powder box 4 under the effect of charge attraction power and gravity, after blackboard eraser is intact, renovating of powder box side opened, powder is poured out.
Claims (3)
1, a kind of static dust-free black board eraser mainly is made of base plate, bristle etc., it is characterized in that base plate hollow, and bristle is equipped with in the top outside of base plate, and is provided with powder inlet, and base plate lower cavity inboard is provided with projection, and the retaining frame is connected with base plate by elastic device.
2, a kind of static dust-free black board eraser according to claim 1 is characterized in that keeping off frame and is made by the light material that is easy to generate static.
3, a kind of static dust-free black board eraser according to claim 1 is characterized in that keeping off between frame and the base plate by one section metal wire and connecting, so that transfer charge fast.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200076950U CN201357669Y (en) | 2009-02-21 | 2009-02-21 | Static dust-free blackboard eraser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200076950U CN201357669Y (en) | 2009-02-21 | 2009-02-21 | Static dust-free blackboard eraser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201357669Y true CN201357669Y (en) | 2009-12-09 |
Family
ID=41423432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200076950U Expired - Fee Related CN201357669Y (en) | 2009-02-21 | 2009-02-21 | Static dust-free blackboard eraser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201357669Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104786709A (en) * | 2015-04-24 | 2015-07-22 | 上海理工大学 | Dual dust collection type blackboard eraser |
-
2009
- 2009-02-21 CN CNU2009200076950U patent/CN201357669Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104786709A (en) * | 2015-04-24 | 2015-07-22 | 上海理工大学 | Dual dust collection type blackboard eraser |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091209 Termination date: 20110221 |