CN2356869Y - Self-absorption blackboard erazer - Google Patents
Self-absorption blackboard erazer Download PDFInfo
- Publication number
- CN2356869Y CN2356869Y CN 99222772 CN99222772U CN2356869Y CN 2356869 Y CN2356869 Y CN 2356869Y CN 99222772 CN99222772 CN 99222772 CN 99222772 U CN99222772 U CN 99222772U CN 2356869 Y CN2356869 Y CN 2356869Y
- Authority
- CN
- China
- Prior art keywords
- blackboard eraser
- utility
- model
- self
- housing
- 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 blackboard eraser in teaching aids. The utility model comprises a blackboard eraser housing body and a hair felt. The utility model is characterized in that the upper part of the blackboard eraser housing body is provided with a rubber ball, and the bottom of the blackboard eraser housing body is provided with a board with slits. The middle part of the blackboard eraser housing body is provided with venting holes. The self-absorption blackboard eraser provided by the utility model aims to cause the blackboard eraser to have a chalk dust absorption function. The utility model has the advantages of large dust suction quantity, good effect and convenient operation, effectively purifies air, is convenient for cleanly scavenging, and is favorable for teachers' and students' health.
Description
The utility model relates to the blackboard eraser in a kind of teaching aid.
Existing blackboard eraser only has unique function of wiping chalk writing, and when using it, dust rises from all around, and air suffers severe contamination, damages teacher's physical and mental health, has also influenced the efficient of their working and learning.
At this situation of chalk ash pollution environment, the utility model provides a kind of self-priming blackboard eraser, and its purpose is to make blackboard eraser can have the function that chalk dust is removed in suction, keeps clean environment.
The utility model is achieved through the following technical solutions:
Self-priming blackboard eraser includes blackboard eraser housing and felt, it is characterized in that: the top at the blackboard eraser housing is provided with rubber ball, is provided with the plate in slit in the bottom of blackboard eraser housing, is provided with passage at the middle part of blackboard eraser housing.
The depression bar that one end top has a groove places the side of blackboard eraser housing, is exposed outside, and the edge of blackboard eraser housing is provided with the hole, communicates with groove when depression bar is depressed; The other end is arranged on the inside of blackboard eraser housing, withstands on the spring, and has latch spacing.
Felt be located at blackboard eraser bottom around, the seam that covers for upwarping in the middle of the bottom.
The utility model has the advantages that the dust suction amount is big, effective, easy to use, clean air is effectively swept health and has also been made things convenient for manyly, is very beneficial for the healthy of teachers and students.The mankind will be developed, and just be unable to do without education.Along with school is more and more, if 300 universities, middle and primary schools of certain municipalization (having surpassed this number in fact), every school is in 3000 people, 50 people form one class, and per tour annual is with two, then 360000 blackboard erasers of the 1 year needs in this city, so, self-priming blackboard eraser not only has very big economic benefit, also has obvious social, and market prospects are boundless.
Accompanying drawing 1 is a structural representation of the present utility model;
Accompanying drawing 2 is a vertical view of the present utility model;
Accompanying drawing 3 is the structural representation in slit 5 of the present utility model.
The utility model is specifically described by implementing ten thousand formulas below in conjunction with accompanying drawing:
The utility model is to be provided with rubber ball 2 by the top at the blackboard eraser wiping board, and the bottom is provided with the plate 12 that has the slit, at the middle part of blackboard eraser housing 1 passage 4 is arranged.
For reaching better effect, the utility model is designed to the side that depression bar 6 that top at one end has groove 13 places blackboard eraser housing 1, is exposed outside, and the edge of blackboard eraser housing 1 inside is provided with hole 7, communicates with groove 13 when depression bar 6 is depressed; The other end of depression bar 7 is arranged on the inside of blackboard eraser housing 1, withstands on the spring 14, and has latch 9 spacing.Before wiping chalk dust, earlier depression bar 6 to be depressed, rubber ball 2 inside communicate with the external world by hole 7 and groove 13, and rubber ball 2 by flat, is loosened depression bar 6, and the spring 14 jack-up depression bars 6 of depression bar 6 other ends cut out hole 7, and at this moment blackboard eraser communicates with the external world by hole 4.In the process of wiping chalk dust, because the bulging certainly function of rubber ball 2, in the chalk dust inspiration rubber ball 2 that felt 3 has been wiped.The effect of latch 9 be limited the rotation of depression bar 6 and about moving range, guarantee the through and off in hole 4,7.
Since felt 3 be located at blackboard eraser bottom around, the seam that covers 5 for upwarping in the middle of the bottom makes a part of dust be drawn into the inner chamber 8 that blackboard eraser housing 1 and base plate 12 form and is difficult for flowing out.
Sealing ring 10 and 11 is used to step up rubber ball 2, all is by thread connection between they and blackboard eraser housing 1 and other connector, convenient disassembly.
Claims (3)
1, a kind of self-priming blackboard eraser, include blackboard eraser housing (1) and felt (3), it is characterized in that: be provided with rubber ball (2) on the top of blackboard eraser housing (1), be provided with the plate (12) in slit in the bottom of blackboard eraser housing (1), be provided with passage (4) at the middle part of blackboard eraser housing (1).
2, self-priming blackboard eraser according to claim 1, it is characterized in that: the depression bar (6) that an end top has groove (13) places the side of blackboard eraser housing (1), be exposed outside, the inner edge of blackboard eraser housing (1) is provided with hole (7), and depression bar (6) is communicated with groove (13) when depressing; The other end of depression bar (6) is arranged on the inside of blackboard eraser housing (1), withstands on the spring (6), and has latch (9) spacing.
3, according to claim 1 fast self-priming blackboard eraser, it is characterized in that: felt (3) be located at the blackboard eraser bottom around, the seam that covers (5) for upwarping in the middle of the bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99222772 CN2356869Y (en) | 1999-02-05 | 1999-02-05 | Self-absorption blackboard erazer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99222772 CN2356869Y (en) | 1999-02-05 | 1999-02-05 | Self-absorption blackboard erazer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2356869Y true CN2356869Y (en) | 2000-01-05 |
Family
ID=34013100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99222772 Expired - Fee Related CN2356869Y (en) | 1999-02-05 | 1999-02-05 | Self-absorption blackboard erazer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2356869Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111216476A (en) * | 2020-01-21 | 2020-06-02 | 吴小花 | Blackboard eraser with self-dust-collection cleaning function |
-
1999
- 1999-02-05 CN CN 99222772 patent/CN2356869Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111216476A (en) * | 2020-01-21 | 2020-06-02 | 吴小花 | Blackboard eraser with self-dust-collection cleaning function |
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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 |