CN203792989U - Blackboard eraser - Google Patents
Blackboard eraser Download PDFInfo
- Publication number
- CN203792989U CN203792989U CN201420219661.9U CN201420219661U CN203792989U CN 203792989 U CN203792989 U CN 203792989U CN 201420219661 U CN201420219661 U CN 201420219661U CN 203792989 U CN203792989 U CN 203792989U
- Authority
- CN
- China
- Prior art keywords
- box body
- blackboard eraser
- semi
- circular recesses
- blackboard
- 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
- 239000004744 fabric Substances 0.000 claims description 6
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 229920000742 Cotton Polymers 0.000 claims description 2
- 239000004677 Nylon Substances 0.000 claims description 2
- 229920001778 nylon Polymers 0.000 claims description 2
- 239000000428 dust Substances 0.000 abstract description 15
- 239000000843 powder Substances 0.000 abstract 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 7
- 238000009825 accumulation Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 206010003694 Atrophy Diseases 0.000 description 1
- 206010014561 Emphysema Diseases 0.000 description 1
- 206010061218 Inflammation Diseases 0.000 description 1
- 206010058467 Lung neoplasm malignant Diseases 0.000 description 1
- 208000003251 Pruritus Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000037444 atrophy Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000004054 inflammatory process Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- 201000005202 lung cancer Diseases 0.000 description 1
- 208000020816 lung neoplasm Diseases 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Landscapes
- Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
Abstract
A blackboard eraser comprises a box body. In length direction of the box body, two semicircular grooves are respectively formed in the box body. Longitudinal slots are respectively formed in the bottoms of the semicircular grooves. Mounting slots are respectively formed in two ends of each semicircular groove. A central brush is formed on a protruded plane between the semicircular grooves. A cap body is connected with the edge of the top of the box body through a hinge. Side brushes corresponding to the longitudinal slots are respectively arranged in the cap body. Length of the side brushes is the same with that of the longitudinal slots. The shaft plates are respectively fixedly on end surfaces of two sides of each roller through fixing bars which are arranged on the sides of the paired shaft plates respectively. Shaft protrusions are respectively arranged on the other sides of the shaft plates and corresponding to central holes which are respectively formed in fixing plates of the mounting slots. With the blackboard eraser, blackboards can be erased easily and cleanly, dust fog generation is avoided. The blackboard eraser is effective to prevent dust fog from generating since accumulated chalk powders are poured out after the cap body is opened, and of great help to teachers' health.
Description
Technical field
The utility model relates to a kind of blackboard eraser.
Background technology
Blackboard eraser is an indispensable part in daily teaching work, although there is very large change in present teaching method, also modernization progressively of teaching aid, but blackboard writing is because of its advantage such as convenient and swift, still has its irreplaceable status and generality.Correspondingly, the use of blackboard eraser is also still very frequent.Common blackboard eraser has distinct advantage, volume small and exquisite, easy to use, wipe clean effective, long service life etc.Meanwhile, its shortcoming is also very obvious, often can find that teacher or student are using in ordinary blackboard eraser erases the board, and holds blackboard eraser except one, and another one hand tends to cover muzzle.That is because can be with a large amount of airborne dusts (mostly being chalk dust) in using ordinary blackboard eraser.The particulate of chalk dust has very strong germ adsorption capacity, and its composition is alkaline matter, and harmful germ, the respiratory system of alkaline matter master to Faculty and Students, skin, ear, nose, throat easily causes inflammation, dry, atrophy, scratches where it itches, lung cancer, pulmonary emphysema and kidney damage.
Produce another kind of blackboard eraser-electric blackboard eraser for the problems referred to above in the market.Electric dustless blackboard eraser mainly contains two types: the one, and electronic dust suction blackboard and supporting blackboard eraser.It is the derivatives that exchange miniature electronic dust catcher, high pressure dust-absorbing plate is placed in after Glass blackboard or wooden blackboard, use the ordinary blackboard eraser blackboard wiping made from hairbrush or porous material, play equally the effect of absorption dust, dust is adsorbed in blackboard eraser.The 2nd, ash-collecting blackboard eraser.Principle is to utilize the rotating vane rotation of blackboard eraser bottom to produce air suction, and the dust producing in wiping process is drawn in blackboard eraser chamber, because the relative low pressure that blade produces is sent into dust in dust bag, reaches the effect of dust suction.
Although it is ripe and in the educational system extensive use of the developed country such as American-European-Japanese that the said goods has been tending towards technically, the structure of dust collector more complicated of above-mentioned electric blackboard eraser is expensive, is difficult to apply in China.
Utility model content
The utility model provides a kind of low price, be easy to use, be easy to the blackboard eraser of cleaning.
A kind of blackboard eraser, comprises box body, and two semi-circular recesses are arranged on the inside of box body along box body length direction, be also provided with a cannelure at the bottommost of each semi-circular recesses, are provided with mounting groove at the two ends of semi-circular recesses; In the plane of the projection between two semi-circular recesses, be provided with central hairbrush; Make to be hinged lid along the edge at box body top, in the time that lid is closed, lid and box body can either form an airtight space; Be provided with limit corresponding with cannelure position and that length is identical with cannelure length brush in the inside of lid.
In order to make roller rotate in semi-circular recesses, paired axle sheet is by being fixed at the hold-down bars of one side setting on the both sides end face of roller, the opposite side of axle sheet is provided with aixs cylinder, and the position of aixs cylinder is corresponding to the centre bore that is arranged on the spacer in mounting groove.The surface of roller can also arrange the cloth of being convenient to blackboard wiping.Central authorities' hairbrush can be cleared up blackboard simultaneously, makes blackboard more clean.
Further, roller surface is provided with wiping cloth.
Further, wiping cloth is nylon or cotton.
The utility model makes to erase the board and becomes more easy, and more clean, has prevented the formation of dust cloud, in order to remove the chalk powder of accumulation, can open lid chalk powder is poured out.The utility model has very great help to teacher's health.
Brief description of the drawings
Fig. 1 is perspective view of the present utility model.
Fig. 2 is installation diagram of the present utility model.
Fig. 3 is cross-sectional view of the present utility model.
Detailed description of the invention
Below in conjunction with Fig. 1-Fig. 3, the utility model is described in detail.
A kind of blackboard eraser, comprises that 1, two semi-circular recesses 11 of box body is arranged on the inside of box body 1 along box body 1 length direction, is also provided with a cannelure 111 at the bottommost of each semi-circular recesses 11, is provided with mounting groove 12 at the two ends of semi-circular recesses 11.In the plane of the projection between two semi-circular recesses 11, be provided with central hairbrush 13.
Edge along box body 1 top makes to be hinged lid 14, and in the time that lid 14 is closed, lid 14 and box body 1 can either form an airtight space.Be provided with limit corresponding with cannelure 111 positions and that length is identical with cannelure 111 length brush 15 in the inside of lid 14.
In order to make roller 2 in the interior rotation of semi-circular recesses 11, paired axle sheet 21 is by being fixed at the hold-down bars 211 of one side setting on the both sides end face of roller 2, the opposite side of axle sheet 21 is provided with aixs cylinder 212, and the position of aixs cylinder 212 is corresponding to the centre bore 211 that is arranged on the spacer 22 in mounting groove 12.The surface of roller 2 can also arrange the cloth of being convenient to blackboard wiping.Central authorities' hairbrush 13 can be cleared up blackboard simultaneously, makes blackboard more clean.
In the time of blackboard eraser 100 blackboard wiping, chalk powder can be bonded at the surface of roller 2, and takes limit to by rotation and brush 15 places, and at this moment limit brush 15 can be removed the chalk powder on roller 2 get off, and chalk powder is sealed up for safekeeping in the space of a sealing.
The utility model makes to erase the board and becomes more easy, and more clean, has prevented the formation of dust cloud, in order to remove the chalk powder of accumulation, can open lid 14 chalk powder is poured out.The utility model has very great help to teacher's health.
Claims (3)
1. a blackboard eraser, is characterized in that: comprise box body, two semi-circular recesses are arranged on the inside of box body along box body length direction, are also provided with a cannelure at the bottommost of each semi-circular recesses, are provided with mounting groove at the two ends of semi-circular recesses; In the plane of the projection between two semi-circular recesses, be provided with central hairbrush; Make to be hinged lid along the edge at box body top; Be provided with limit corresponding with cannelure position and that length is identical with cannelure length brush in the inside of lid; Paired axle sheet is by being fixed on the both sides end face of roller at the hold-down bars of one side setting, and the opposite side of axle sheet is provided with aixs cylinder, and the position of aixs cylinder is corresponding to the centre bore that is arranged on the spacer in mounting groove.
2. a kind of blackboard eraser according to claim 1, is characterized in that: roller surface is provided with wiping cloth.
3. a kind of blackboard eraser according to claim 2, is characterized in that: described wiping cloth is nylon or cotton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420219661.9U CN203792989U (en) | 2014-04-30 | 2014-04-30 | Blackboard eraser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420219661.9U CN203792989U (en) | 2014-04-30 | 2014-04-30 | Blackboard eraser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203792989U true CN203792989U (en) | 2014-08-27 |
Family
ID=51375245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420219661.9U Expired - Fee Related CN203792989U (en) | 2014-04-30 | 2014-04-30 | Blackboard eraser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203792989U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105172432A (en) * | 2015-10-19 | 2015-12-23 | 石家庄科达文教用品有限公司 | Electric integrated dry wiping writing board |
-
2014
- 2014-04-30 CN CN201420219661.9U patent/CN203792989U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105172432A (en) * | 2015-10-19 | 2015-12-23 | 石家庄科达文教用品有限公司 | Electric integrated dry wiping writing board |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140827 Termination date: 20150430 |
|
| EXPY | Termination of patent right or utility model |