CN103182885A - Chalk cover - Google Patents
Chalk cover Download PDFInfo
- Publication number
- CN103182885A CN103182885A CN 201310117048 CN201310117048A CN103182885A CN 103182885 A CN103182885 A CN 103182885A CN 201310117048 CN201310117048 CN 201310117048 CN 201310117048 A CN201310117048 A CN 201310117048A CN 103182885 A CN103182885 A CN 103182885A
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- CN
- China
- Prior art keywords
- chalk
- rubber sleeve
- cover
- overcoat
- sleeve
- 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.)
- Pending
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- Drawing Aids And Blackboards (AREA)
Abstract
The invention relates to a chalk cover. When the chalk cover is used, a chalk is inserted into a through hole in a rubber sleeve and a part of the tip of the chalk is exposed, and then the cover is sleeved on the rubber sleeve and slides along the axis direction. The rubber sleeve is in a conical structure and the cover has a taper hole, so the cover inwards extrudes the rubber sleeve during sliding, so that the rubber sleeve is deformed to be firmly fixed on the chalk. When a teacher is writing with the chalk, the position held by fingers is the cover, and an applying force is finally distributed on the chalk from the cover to the rubber sleeve, so that breaking of the chalk is effectively avoided, and convenience of the chalk in use is improved.
Description
Technical field
The present invention relates to a kind of teaching aid, be specifically related to a kind of chalk sleeve.
Background technology
As everyone knows, teacher often uses thumb and forefinger de-clamping chalk with the chalk writing board book time, but often more crisp its hardness is not high for chalk.Tell when writing teacher and often because of the excessive situation of pinch off chalk that causes of exerting oneself the inconvenience that has caused waste and used to take place.
Summary of the invention
The present invention provides a kind of chalk sleeve in order to overcome the deficiency of above technology.
The present invention overcomes the technical scheme that its technical problem adopts:
This chalk sleeve, comprise the overcoat on rubber sleeve, slip suit and the rubber sleeve of taper type, described rubber sleeve is provided with through hole along axis direction, the diameter of described through hole and the diameter of chalk are complementary, described overcoat is provided with taper hole along axis direction, and the male cone (strobilus masculinus) size of the size of described taper hole and rubber sleeve is complementary.
Teacher also comprises being arranged at outer laser pen and the switch that puts to the explanation of writing on the blackboard content for convenience, and described switch is electrically connected on laser pen.
The invention has the beneficial effects as follows: during use, chalk is inserted in the through hole of rubber sleeve, and make chalk exposed portions serve head end, afterwards coat suit is slided on rubber sleeve and along axis direction, because rubber sleeve is that pyramidal structure and overcoat have taper hole, therefore outer being enclosed within the sliding process can inwardly be pushed rubber sleeve, makes the rubber sleeve distortion that it firmly is fixed on the chalk.The position of teacher's fingerhold when writing is overcoat, adds the power of holding and finally is distributed to uniformly on the chalk by being set to rubber sleeve outward, has therefore effectively avoided fractureing of chalk, has improved the convenience that uses chalk.
Description of drawings
Fig. 1 is structural representation of the present invention;
Among the figure, 1. chalk 2. rubber sleeves 3. overcoats 4. switches 5. laser pens.
The specific embodiment
The present invention will be further described below in conjunction with accompanying drawing 1.
This chalk sleeve, comprise the overcoat 3 on rubber sleeve 2, slip suit and the rubber sleeve 2 of taper type, described rubber sleeve 2 is provided with through hole along axis direction, the diameter of the diameter of described through hole and chalk 1 is complementary, described overcoat 3 is provided with taper hole along axis direction, and the male cone (strobilus masculinus) size of the size of described taper hole and rubber sleeve 2 is complementary.During use, chalk 1 is inserted in the through hole of rubber sleeve 2, and make chalk 1 exposed portions serve head end, afterwards overcoat 3 is set on the rubber sleeve 2 and along axis direction and slides, because rubber sleeve 2 has taper hole for pyramidal structure and overcoat 3, therefore overcoat 3 can inwardly push rubber sleeve 2 in sliding process, makes rubber sleeve 2 distortion that it firmly is fixed on the chalk 1.The position of teacher's fingerhold when writing is overcoat 3, adds the power of holding and finally is distributed to uniformly on the chalk 1 to rubber sleeve 2 by overcoat 3, has therefore effectively avoided fractureing of chalk 1, has improved the convenience that uses chalk.
Often use the religion bar when teacher explains writing on the blackboard at school now, need put down chalk but be to use when teaching bar, when needs are annotated and commented on, have to put down and teach bar to pick up chalk again, very inconvenient.Therefore this chalk sleeve also comprises laser pen 5 and the switch 4 that is arranged on the overcoat 3, and described switch 4 is electrically connected on laser pen 5.Therefore teacher can put down chalk when writing on the blackboard is explained, and lights laser pen 5 by opening switch 4, guides the student that writing on the blackboard is explained by the bright spot that laser pen 5 sends, and is easy to use, alleviated teacher's working strength.
Claims (2)
1. chalk sleeve, it is characterized in that: comprise the overcoat (3) on rubber sleeve (2), slip suit and the rubber sleeve (2) of taper type, described rubber sleeve (2) is provided with through hole along axis direction, the diameter of the diameter of described through hole and chalk (1) is complementary, described overcoat (3) is provided with taper hole along axis direction, and the male cone (strobilus masculinus) size of the size of described taper hole and rubber sleeve (2) is complementary.
2. chalk sleeve according to claim 1, it is characterized in that: also comprise the laser pen (5) and the switch (4) that are arranged on the overcoat (3), described switch (4) is electrically connected on laser pen (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310117048 CN103182885A (en) | 2013-04-07 | 2013-04-07 | Chalk cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310117048 CN103182885A (en) | 2013-04-07 | 2013-04-07 | Chalk cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103182885A true CN103182885A (en) | 2013-07-03 |
Family
ID=48674443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201310117048 Pending CN103182885A (en) | 2013-04-07 | 2013-04-07 | Chalk cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103182885A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110341348A (en) * | 2019-08-15 | 2019-10-18 | 浙江海洋大学 | A kind of chalk clamping device |
| CN113289104A (en) * | 2021-06-07 | 2021-08-24 | 宁波开发区医院 | Anticoagulant injection device for hemodialysis |
-
2013
- 2013-04-07 CN CN 201310117048 patent/CN103182885A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110341348A (en) * | 2019-08-15 | 2019-10-18 | 浙江海洋大学 | A kind of chalk clamping device |
| CN113289104A (en) * | 2021-06-07 | 2021-08-24 | 宁波开发区医院 | Anticoagulant injection device for hemodialysis |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130703 |