CN202593032U - A chalk jacket - Google Patents
A chalk jacket Download PDFInfo
- Publication number
- CN202593032U CN202593032U CN 201220096775 CN201220096775U CN202593032U CN 202593032 U CN202593032 U CN 202593032U CN 201220096775 CN201220096775 CN 201220096775 CN 201220096775 U CN201220096775 U CN 201220096775U CN 202593032 U CN202593032 U CN 202593032U
- Authority
- CN
- China
- Prior art keywords
- chalk
- sleeve
- utility
- model
- screw rod
- 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
Landscapes
- Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
Abstract
The utility model provides a chalk jacket, comprising an outer barrel and a rotation switch. A sleeve is disposed in the outer barrel and is fixed on a screw, and the screw is in threaded connection with the rotation switch. The chalk jacket is easy to manufacture and easy to use, causes no pollution, saves chalks and reduces educational cost of schools.
Description
Technical field
The utility model relates to a kind of educational aid, relates in particular to a kind of chalk sleeve.
Background technology
As everyone knows, when the teacher worked on the post in education, every day is in various degree contact chalk all.The chalk dust of full hand often occurs, be not easy very much cleaning, and chalk dust can be inhaled into teacher's lung, often the illness rate of teacher's pneumoconiosis exceeds much than the people of other work; The chalk that uses at present very easily ruptures, and the utilization rate of a general box chalk is merely 2/3rds.
The utility model content
The purpose of the utility model is the problem that exists in the prior art in order to overcome, and a kind of chalk sleeve is provided.
A kind of chalk sleeve of the utility model, it comprises urceolus and rotary switch, is provided with sleeve in the said urceolus, and sleeve is fixed on the screw rod, and said screw rod and rotary switch are through being threaded.
The utility model compared with prior art has the following advantages:
1, the utility model is made simple, easy to use, pollution-free.
2, the utility model has been practiced thrift chalk, has reduced the educational costs of school.
Description of drawings
Below in conjunction with the specific embodiment further detailed explanation of accompanying drawing to the utility model.
Fig. 1 is the utility model structural representation.
Among the figure: 1-urceolus, 2-rotary switch, 3-sleeve, 4-screw rod.
The specific embodiment
Like a kind of chalk sleeve of Fig. 1, it comprises urceolus 1 and rotary switch 2, is provided with sleeve 3 in the urceolus 1, and sleeve 3 is fixed on the screw rod 4, and screw rod 4 and rotary switch 2 are through being threaded.
During use, chalk is contained on the sleeve 3, through rotation to rotary switch 2, control screw rod 4, thus reach the length that the control chalk stretches out urceolus 1.So just can directly contact chalk, reduce infringement the people without hand; And make chalk stretch out suitable length, be difficult for making the chalk fracture.
Claims (1)
1. chalk sleeve, it is characterized in that: it comprises urceolus (1) and rotary switch (2), is provided with sleeve (3) in the said urceolus (1), and sleeve (3) is fixed on the screw rod (4), and said screw rod (4) and rotary switch (2) are through being threaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220096775 CN202593032U (en) | 2012-03-15 | 2012-03-15 | A chalk jacket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220096775 CN202593032U (en) | 2012-03-15 | 2012-03-15 | A chalk jacket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202593032U true CN202593032U (en) | 2012-12-12 |
Family
ID=47310615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220096775 Expired - Fee Related CN202593032U (en) | 2012-03-15 | 2012-03-15 | A chalk jacket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202593032U (en) |
-
2012
- 2012-03-15 CN CN 201220096775 patent/CN202593032U/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: 20121212 Termination date: 20130315 |