CN2375480Y - Chalk dust collecting eraser - Google Patents
Chalk dust collecting eraser Download PDFInfo
- Publication number
- CN2375480Y CN2375480Y CN 99207302 CN99207302U CN2375480Y CN 2375480 Y CN2375480 Y CN 2375480Y CN 99207302 CN99207302 CN 99207302 CN 99207302 U CN99207302 U CN 99207302U CN 2375480 Y CN2375480 Y CN 2375480Y
- Authority
- CN
- China
- Prior art keywords
- power train
- blackboard eraser
- housing
- dust
- chalk
- 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 relates to a dust collecting blackboard eraser which can not only erase chalk characters, but also collect erased chalk dust. A plurality of rows of brushes are embedded at the bottom of a rectangular housing body, and long and thin slits are arranged among each row of brushes and are communicated with an inner hole of the housing body. A directional variable speed transmission system is arranged in the housing body, and a rubber wheel, fan blades and the transmission system are in mechanical connection. When the utility model is used for wiping a blackboard, the rubber wheel contacted with the blackboard is rotated to cause the fan blades to be rotated by the transmission system. Thereby, wiped chalk dust can be collected.
Description
The utility model relates to a kind of scavenge unit of wiping letter written with chalk, especially can absorb the dust absorption blackboard eraser of the chalk dust under wiping.
At present, known blackboard eraser is embedded in a few row's hairbrush on the plank and constitutes.Letter written with chalk is cleaned in rubbing action by hairbrush.The chalk dust under but such blackboard eraser is wiped flies upward everywhere.Near the person of erasing the board reaches people endangers healthy very easily in the chalk dust inspiration body.
The purpose of this utility model provides a kind of dust absorption blackboard eraser, and it can not only wipe chalk writing, and can absorb the chalk dust under wiping when wiping letter written with chalk.
The purpose of this utility model is achieved in that and is embedded with a few row's hairbrush below the cuboid housing, opens the bar elongate slot and communicate with the housing endoporus between every row's hairbrush.One directed speed change power train is set in the housing, makes rubber wheel, fan blade and this directed speed change power train mechanical connection.When erasing the board, when hairbrush was wiped down chalk dust, the moving repeatedly of housing drove the rubber that contact with blackboard and takes turns rotation, by directed speed change power train fan blade also rotated.Fan blade is rotated the suction that produces, and the chalk dust inspiration housing under wiping, has both wiped letter written with chalk thereby reach by the dust suction seam, absorbs the purpose of the chalk dust under wiping again.
Owing to adopt such scheme, can when wiping letter written with chalk, absorb the chalk dust under wiping, avoided the harm of chalk dust to human body.
Below in conjunction with accompanying drawing the utility model dust absorption blackboard eraser is further specified.
Figure one is the utility model blackboard eraser internal structure schematic diagram.
Figure two is the utility model blackboard eraser polycrystalline substance schematic diagrames.
1 rubber wheel, 2 freewheel clutches, 3 moving gears, 4 planetary gears, 5 supports, 6 planetary gears, 7 fixed gears, 8 fan blade, 9 air suction openings, 10 fan blade, 11 fixed gears, 12 planetary gears, 13 supports, 14 planetary gears, 15 moving gears, 16 freewheel clutches, 17 rubbers wheel, 18 housings among the figure one.
1 housing, 2 dust suctions seam, 3 rubbers wheel, 4 hairbrush grooves, 5 rubbers wheel among the figure two.
In figure one, enclosure interior is divided into two parts symmetrical, and each member of two parts is all corresponding identical, but freewheel clutch (2) and freewheel clutch (16) output switched in opposite.Left-half rubber wheel (1) is connected with freewheel clutch (2) axle, and freewheel clutch (2) is connected with moving gear (3) axle.Fixed gear (7) is fixed in the housing (18) and with planetary gear (4,6) supports (5) forms planet circular system.Fan blade (8) and support (5) mechanical connection.Each corresponding component of right half part connects identical with left-half.
In figure two, hairbrush groove (4) but in the setting-in hairbrush.Dust suction that housing (1) bottom surface is left seam (2) is spaced with hairbrush groove (4), and communicates with the air suction opening (figure 1) that leaves in the housing (1).The wheel rim of rubber wheel (3,5) should expose certain distance from housing (1) so that hairbrush when contacting with blackboard rubber take turns (3,5) and also contact with blackboard.
The motion conditions of internals when contrast figure one explanation dust absorption blackboard eraser uses.When erasing the board, dust absorption blackboard eraser moves in a certain direction, and the rubber wheel (figure one 1,17) that contacts with blackboard rotates, and when freewheel clutch (2) output speed, freewheel clutch (16) but disconnects transmission.The output speed of freewheel clutch (2) rotates fan blade (8) after the planet circular system speed change that fixed gear (7), moving gear (3), planetary gear (4,6) and support (5) are formed.Fan blade (8) is rotated the suction that produces and just chalk dust is sucked in the housing (18).One cavity that communicates with air suction opening is set to deposit the chalk dust of suction on housing (18) top.When chalk dust is filled with, can opens the cap at housing (18) top chalk dust is outwelled.When dust absorption blackboard eraser was mobile in opposite direction, the planet circular system of fixed gear (11), moving gear (15), planetary gear (12,14), support (13) composition passed to the rotation of rubber wheel (17) by freewheel clutch (16).The planet circular system output speed rotates fan blade (10) to carry out dust suction.Freewheel clutch (2) but disconnects the rotating speed of rubber wheel (1) input.Avoided like this left-half power train among the figure one being impacted because of the counter-rotating of rubber wheel (1).Because effect of inertia fan blade (8) still turns to rotation by former, avoids because of its counter-rotating chalk dust being blown out.Equally, oppositely mobile once more when dust absorption blackboard eraser, freewheel clutch (16) disconnects transmission, fan blade (10) is still rotated by former direction carry out dust suction.Moving repeatedly of dust absorption blackboard eraser can both make it absorb chalk dust when erasing the board like this.
Claims (2)
1. dust absorption blackboard eraser, a few row's hairbrush of setting-in below the rectangle housing is characterized in that: open the bar elongate slot between every row's hairbrush, and also communicate in the housing; One directed speed change power train is set, rubber wheel, fan blade and this power train mechanical connection in the housing.
2. dust absorption blackboard eraser according to claim 1 is characterized in that: directed speed change power train adopts two cover power trains of symmetry.Two freewheel clutch output switched in opposite wherein make all directed output of two parts power train, and the output switched in opposite, and dust absorption blackboard eraser is forward and reverse like this moves, and fan blade is all being carried out dust suction.Planet circular system is adopted in the variable part in the power train, and available like this three kinds of gears are realized very big gearratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99207302 CN2375480Y (en) | 1999-04-01 | 1999-04-01 | Chalk dust collecting eraser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99207302 CN2375480Y (en) | 1999-04-01 | 1999-04-01 | Chalk dust collecting eraser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2375480Y true CN2375480Y (en) | 2000-04-26 |
Family
ID=34001339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99207302 Expired - Fee Related CN2375480Y (en) | 1999-04-01 | 1999-04-01 | Chalk dust collecting eraser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2375480Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102367033A (en) * | 2011-12-05 | 2012-03-07 | 许晨曦 | Automatic dust-absorption blackboard eraser |
| CN108909296A (en) * | 2018-06-26 | 2018-11-30 | 武汉理工大学 | Purely mechanical based on planetary gear train can turn to green energy conservation blackboard eraser |
-
1999
- 1999-04-01 CN CN 99207302 patent/CN2375480Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102367033A (en) * | 2011-12-05 | 2012-03-07 | 许晨曦 | Automatic dust-absorption blackboard eraser |
| CN108909296A (en) * | 2018-06-26 | 2018-11-30 | 武汉理工大学 | Purely mechanical based on planetary gear train can turn to green energy conservation blackboard eraser |
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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 |