CN203267542U - Chalk sleeve - Google Patents
Chalk sleeve Download PDFInfo
- Publication number
- CN203267542U CN203267542U CN 201320167639 CN201320167639U CN203267542U CN 203267542 U CN203267542 U CN 203267542U CN 201320167639 CN201320167639 CN 201320167639 CN 201320167639 U CN201320167639 U CN 201320167639U CN 203267542 U CN203267542 U CN 203267542U
- Authority
- CN
- China
- Prior art keywords
- chalk
- sleeve
- rubber sleeve
- outer sleeve
- overcoat
- 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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- Drawing Aids And Blackboards (AREA)
Abstract
The utility model relates to a chalk sleeve. When the chalk sleeve is used, a chalk is inserted into a through hole of a rubber sleeve to enable the part of the head end of the chalk to be exposed, then the rubber sleeve is sleeved with an outer sleeve, and the outer sleeve slides in the axial direction. Due to the fact that the rubber sleeve is of a conical structure and a conical hole is formed in the outer sleeve, the outer sleeve extrudes the rubber sleeve inwards during the sliding process of the outer sleeve to enable the rubber sleeve to be deformed and firmly fixed on the chalk. A teacher clamps the outer sleeve with fingers when writing with the chalk, clamping force is imposed from the outer sleeve to the rubber sleeve and is evenly distributed on the chalk finally, therefore fracture of the chalk is effectively avoided, and convenience of usage of the chalk is improved.
Description
Technical field
The utility model relates to a kind of teaching aid, is specifically related to a kind of chalk sleeve.
Background technology
As everyone knows, teacher often use thumb and forefinger de-clamping chalk, but often more crisp its hardness is not high for chalk with the chalk-writing writing on the blackboard time.When writing, teacher told often because the excessive situation of pinch off chalk that causes of exerting oneself occurs, caused the inconvenience in waste and use.
Summary of the invention
The utility model provides a kind of chalk sleeve in order to overcome the deficiency of above technology.
The technical scheme that its technical problem that overcomes the utility model adopts is:
This chalk sleeve, comprise the rubber sleeve of taper type, the overcoat on slide suit and rubber sleeve, 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.
Be arranged at outer laser pen and the switch that puts in order to facilitate teacher to the explanation of writing on the blackboard content, also to comprise, described switch is electrically connected on laser pen.
The beneficial effects of the utility model are: 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 sliding process can inwardly be pushed rubber sleeve, makes the rubber sleeve distortion that it firmly is fixed on chalk.The position of teacher's fingerhold when writing is overcoat, adds the power of holding and finally is distributed to uniformly on 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 utility model;
In figure, 1. chalk 2. rubber sleeve 3. overcoat 4. switch 5. laser pens.
The specific embodiment
Be described further below in conjunction with 1 pair of the utility model of accompanying drawing.
This chalk sleeve, comprise the rubber sleeve 2 of taper type, the overcoat 3 on slide suit and rubber sleeve 2, 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 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 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 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 teaching pole when now teacher explains writing on the blackboard at school, but need to put down chalk when using teaching pole, have when needs are annotated and commented on and need to put down teaching pole and pick up again chalk, very inconvenient.Therefore this chalk sleeve also comprises laser pen 5 and the switch 4 that is arranged on 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 rubber sleeve (2) of taper type, the overcoat (3) on slide suit and rubber sleeve (2), 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 overcoat (3), described switch (4) is electrically connected on laser pen (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320167639 CN203267542U (en) | 2013-04-07 | 2013-04-07 | Chalk sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320167639 CN203267542U (en) | 2013-04-07 | 2013-04-07 | Chalk sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203267542U true CN203267542U (en) | 2013-11-06 |
Family
ID=49498017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320167639 Expired - Fee Related CN203267542U (en) | 2013-04-07 | 2013-04-07 | Chalk sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203267542U (en) |
-
2013
- 2013-04-07 CN CN 201320167639 patent/CN203267542U/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: 20131106 Termination date: 20140407 |