CN200942662Y - Free-falling dustfree simple blackboard eraser - Google Patents
Free-falling dustfree simple blackboard eraser Download PDFInfo
- Publication number
- CN200942662Y CN200942662Y CN 200620022323 CN200620022323U CN200942662Y CN 200942662 Y CN200942662 Y CN 200942662Y CN 200620022323 CN200620022323 CN 200620022323 CN 200620022323 U CN200620022323 U CN 200620022323U CN 200942662 Y CN200942662 Y CN 200942662Y
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- brushing
- blackboard eraser
- dust
- free
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- Expired - Fee Related
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Abstract
The utility model relates to a simple free-fall dust-free blackboard eraser, comprising an arc shell (12), secondary brushes (2, 3) on the arc shell, a main brush frame (13) and a main brush (1) in the shell, a dust port or box (11) below the arc shell, and dust chutes (4, 5, 6) between the primary brush and the secondary brushes, wherein, the top part of the arc shell is in an enclosed structure. The blackboard eraser provided in the utility model is novel in design and simple in structure, and utilize the principle of free falling by gravity to suppress dust, and delivers good dust suppression effect; the blackboard eraser is low in cost and can be used widely. During use, the dust will fall along the enclosed dust chutes, and thereby will not affect writing and blackboard erasing. The brushes can be replaced freely, and thereby the service life of the blackboard eraser can be improved; the blackboard eraser is applicable in regions in different economic conditions.
Description
Technical field
The utility model relates to teaching aid, specifically free fall dustless simple blackboard eraser.
Background technology
China is a developing country, and most regional teaching condition facilities fall behind, and economic condition is limited.In teaching, blackboard, chalk remain optimal selection.In order to alleviate chalk dust academics and students's health is worked the mischief, people carry out a large amount of designs and research to blackboard eraser, original blackboard eraser does not have to consider dustproof substantially, though and some novel blackboard eraser functions that occur now all strengthen to some extent, but the mechanical complexity that has involves great expense or complicated operation, be unfavorable for that large tracts of land promotes, the consideration that has dustproof but dustproof effect is undesirable.
Summary of the invention
The purpose of this utility model provides a kind of free fall dustless simple blackboard eraser that can improve teaching condition, loopful guarantor, optimize teaching environment.
Free fall dustless simple blackboard eraser of the present utility model is to utilize the principle of gravity by chalk dust free-falling silence, designs the structure of blackboard eraser dexterously.Its concrete formation is: be made of arc housing (12) and the benefit brushing on it (2,3), main brushing frame (13) in this housing and the main brushing (1) on it, collection dust-exhausting port or box (11) in arc housing lower end; Leave depositing dust groove (4,5,6) between main brushing and benefit brushing, the top of arc housing is a full-closed structure.Its outward appearance is the strip of a semicircle, also other shape.
Wherein, main brushing and benefit brushing width are different, and main brushing is thin (two), right moving brushing (reaching the moving brushing of stepping down in a left side) and a left side moving benefit brushing (and right moving brushing of the stepping down) broad mended, and carefully pressure is bigger for main brushing in the process of erasing the board, and is easy to wipe.And the clear scrape along that benefit brushing broad carries out once more is dustproof, and three brushing work are all arranged in wiping to the left or to the right.And the dust of wiping will be done freely along left depositing dust groove (4), right depositing dust groove (5) and middle depositing dust groove (6) and descend.
Top trussed shore (9), bottom trussed shore (10) can be equipped with in the back side of blackboard eraser two ends dress up and down, can be used as handle when manual and the traction inserting column when motor-driven, also dismounting that can be flexible, for example: when manual operation, overall volume is done little, can remove (9,10) and directly grasps etc.
Blackboard eraser of the present utility model is skillfully constructed, and with the simplest direct gravity effect free-falling depositing dust, it is simple in structure, and dust-laying effect is very good, and is with low cost, is easy to promote.Dust can reach depositing dust gradually when erasing the board in the depositing dust groove of sealing, can not influence the speed of writing and wiping blackboard.Brushing is designed to make things convenient for freely to be changed, thereby service life big leap ahead, (its size can change as the case may be with the area that adapts to different economic conditions, can do it less in the area that economic condition is relatively poor, the convenient hand-held dust of wiping, the area that economic condition is good also can cooperate tracker action to use).
Description of drawings
Fig. 1 is a free fall dustless simple blackboard eraser front schematic view of the present utility model;
Fig. 2 is a free fall dustless simple blackboard eraser schematic rear view of the present utility model;
Fig. 3 is the A-A profile of Fig. 1;
Fig. 4 is that the B of Fig. 1 is to schematic diagram;
Among the figure, 1-master's brushing, the right moving brushing (and the moving brushing of stepping down in a left side) of mending of 2-, moving brushing (and right moving brushing of stepping down), 4-left side depositing dust groove, the right depositing dust groove of 5-mended in a 3-left side, depositing dust groove in the middle of the 6-, 7-tip edge Dustproof brush, 8-bottom edge Dustproof brush, 9-top trussed shore, 10-bottom trussed shore, 11-collection, dust-exhausting port or box, the arc housing of 12-, 13-master's brushing frame.
The specific embodiment
As shown in the figure, free fall dustless simple blackboard eraser of the present utility model is made of arc housing 12 and the benefit brushing 2 and 3 on it, main brushing frame 13 in this housing and the main brushing 1 on it, collection dust-exhausting port or box 11 in arc housing lower end; Between main brushing and benefit brushing, leave the depositing dust groove, promptly left depositing dust groove 4, right depositing dust groove 5, middle depositing dust groove 6, the top of arc housing is a full-closed structure.Its outward appearance is the strip of a semicircle, also other shape.As shown in Figure 3, main brushing and benefit brushing width are different, and main brushing is thin (two), right moving brushing (reaching the moving brushing of stepping down in a left side) and a left side moving benefit brushing (and right moving brushing of the stepping down) broad mended, and brushing can make things convenient for freely to be changed.Top trussed shore 9, bottom trussed shore 10 are equipped with in the back side of blackboard eraser up and down two ends, can be used as handle when manual and the traction inserting column when motor-driven, also dismounting that can be flexible.Arc housing tip edge has Dustproof brush 7 and bottom edge Dustproof brush 8.Collection dust discharge box 11 can have two kinds of operating positions, and the one,, can opening, as leading ash mouthful, this device uses with corollary equipment (automatic erasing blackboard), and the 2nd,, be designed to active box and can be used for manual operation and use, be ash collection slot, make things convenient for economic condition to have limited region to use.
Blackboard eraser of the present utility model can be according to blackboard size design length in the better area of economy, is equipped with motor-drivenly again, and motor-driven erasing speed is very fast.
Claims (4)
1, a kind of free fall dustless simple blackboard eraser is characterized in that being made of arc housing (12) and the benefit brushing on it (2,3), main brushing frame (13) in this housing and the main brushing (1) on it, collection dust-exhausting port or box (11) in arc housing lower end; Leave depositing dust groove (4,5,6) between main brushing and benefit brushing, the top of arc housing is a full-closed structure.
2, free fall dustless simple blackboard eraser according to claim 1 is characterized in that main brushing and benefit brushing width are different, and main brushing is thinner, right moving brushing and the left moving brushing broad of mending mended.
3, free fall dustless simple blackboard eraser according to claim 1 is characterized in that arc housing (12) tip edge has Dustproof brush (7) and bottom edge Dustproof brush (8).
4, free fall dustless simple blackboard eraser according to claim 1 is characterized in that top trussed shore (9), bottom trussed shore (10) are equipped with in two ends up and down in the back side of blackboard eraser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620022323 CN200942662Y (en) | 2006-08-31 | 2006-08-31 | Free-falling dustfree simple blackboard eraser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620022323 CN200942662Y (en) | 2006-08-31 | 2006-08-31 | Free-falling dustfree simple blackboard eraser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200942662Y true CN200942662Y (en) | 2007-09-05 |
Family
ID=38717289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620022323 Expired - Fee Related CN200942662Y (en) | 2006-08-31 | 2006-08-31 | Free-falling dustfree simple blackboard eraser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200942662Y (en) |
-
2006
- 2006-08-31 CN CN 200620022323 patent/CN200942662Y/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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070905 Termination date: 20100831 |