CN2282992Y - Electric dust-absorption blackboard eraser - Google Patents
Electric dust-absorption blackboard eraser Download PDFInfo
- Publication number
- CN2282992Y CN2282992Y CN 97206141 CN97206141U CN2282992Y CN 2282992 Y CN2282992 Y CN 2282992Y CN 97206141 CN97206141 CN 97206141 CN 97206141 U CN97206141 U CN 97206141U CN 2282992 Y CN2282992 Y CN 2282992Y
- Authority
- CN
- China
- Prior art keywords
- dust
- blackboard eraser
- utility
- model
- exhaust fan
- 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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- Electrostatic Separation (AREA)
Abstract
The utility model relates to an electric dust-absorption blackboard eraser which belongs to the technical field of teaching appliances. The utility model has the technical proposal that a blackboard eraser is provided with a casing 7, a motor 9, an exhaust fan 1 and a shaft 4 are arranged in the casing 7, a brush 3 is arranged on the shaft 4, a hierarchical dust collecting chamber 5 and a first dust collecting 8 are arranged in the casing 7, and the side face of the brush 3 is provided with a plurality of dust inlet holes 6. The utility model has the advantages that dust flying is avoided while in use, air is not polluted, and the health of the bodies of students and teachers is not affected, and has the advantages of stepwise dust collection, minimal power consumption and small size.
Description
The utility model belongs to the teaching aid technical field, is a kind of electric dust absorption blackboard eraser that can avoid dust from flying.
The blackboard eraser that uses in the school all is structures that hairbrush connects with brush holder.Hold concurrently although its cost is low, still have many deficiencies: dust from flying when erasing the board, polluted room air; Dust is sucked in a large number by the user, has had a strong impact on the healthy of student and teacher.In recent years, it is on probation that electric dust absorption blackboard eraser once designed, but because its volume is big, unreasonable structure, dust suction is not thorough, fails to promote the use of always.
The purpose of this utility model is a kind of electric dust absorption blackboard eraser of design, and it is little, rational in infrastructure to make it have a volume, can avoid advantages such as dust from flying, dust suction be quick, thorough.
The technical solution of the utility model is: blackboard eraser has shell 7, motor 9, exhaust fan 1, axle 4 are installed in the shell 7, hairbrush 3 is installed on the axle 4, be provided with the stagewise dust storage chamber 5 and first dust storage chamber 8 in the shell 7, be provided with several in the side of hairbrush 3 and enter dirt hole 6, motor 9 drives exhaust fan 1 by driving-belt 12 and rotates, and exhaust fan 1 drives axle 4 by driving-belt 11 and rotates.
Description of drawings; Fig. 1 is the utility model structural representation; Accompanying drawing 2 is A-A profiles in the accompanying drawing 1.
The contrast accompanying drawing is described further the utility model:
7 is shells among the figure, and motor 9, exhaust fan 1, axle 4 are installed in the shell 7, and hairbrush 3 is installed on the axle 4, and hairbrush 3 is the drum-type brush.Be provided with the stagewise dust storage chamber 5 and first dust storage chamber 8 in the shell 7, be provided with several in the side of hairbrush 3 and enter dirt hole 6.Motor 9 drives centrifugal exhausting fan 1 by driving-belt 12 and rotates, and exhaust fan 1 drives axle 4 by driving-belt 11 and rotates, and then hairbrush 3 is rotated.During use, motor 9 rotates, rotate by exhaust fan 1 and then drive hairbrush 3, hairbrush 3 is attached on the blackboard, when hairbrush 3 rotates letter written with chalk is wiped in the time of blackboard, exhaust fan 1 rotation at a high speed, air in the dust storage chamber is reduced, form negative pressure, dust enters first dust storage chamber 8 by air admission hole 6, enter other each dust storage chamber then one by one, promptly the stagewise dust storage chamber 5.Because the first dust storage chamber space is relatively large; air-flow is slowed down; so bigger dust granules can be fallen the bottom of dust storage chamber; lighter dust then can enter next dust storage chamber; when dust entered another dust storage chamber by a dust storage chamber, air-flow was forced to turn to, because action of centrifugal force; dust falls step by step, and the last few air of dustiness is deflated fan 1 and discharges.
The utlity model has avoid when using dust from flying, not contaminated air, do not affect student and teacher Healthy advantage, thus and have control of dust step by step and reach consumed power minimum, advantage that volume is little.
Claims (2)
1, electric dust absorption blackboard eraser, it has shell (7), it is characterized in that: motor (9), exhaust fan (1), axle (4) are installed in the shell (7), hairbrush (3) is installed on the axle (4), be provided with stagewise dust storage chamber (5) and first dust storage chamber (8) in the shell (7), be provided with several in the side of hairbrush (3) and enter dirt hole (6).
2, electric dust absorption blackboard eraser according to claim 1 is characterized in that: motor (9) drives exhaust fan (1) by driving-belt (12) and rotates, and exhaust fan (1) drives axle (4) by driving-belt (11) and rotates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97206141 CN2282992Y (en) | 1997-03-06 | 1997-03-06 | Electric dust-absorption blackboard eraser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97206141 CN2282992Y (en) | 1997-03-06 | 1997-03-06 | Electric dust-absorption blackboard eraser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2282992Y true CN2282992Y (en) | 1998-06-03 |
Family
ID=33926208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97206141 Expired - Fee Related CN2282992Y (en) | 1997-03-06 | 1997-03-06 | Electric dust-absorption blackboard eraser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2282992Y (en) |
-
1997
- 1997-03-06 CN CN 97206141 patent/CN2282992Y/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 |