CN204977924U - Chalk sleeve - Google Patents
Chalk sleeve Download PDFInfo
- Publication number
- CN204977924U CN204977924U CN201520536883.8U CN201520536883U CN204977924U CN 204977924 U CN204977924 U CN 204977924U CN 201520536883 U CN201520536883 U CN 201520536883U CN 204977924 U CN204977924 U CN 204977924U
- Authority
- CN
- China
- Prior art keywords
- chalk
- sleeve pipe
- screw propulsion
- sleeve
- propulsion 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 sleeve, including hollow sleeve pipe, its characterized in that, the sheathed tube entry end be equipped with the screw propulsion pole, be equipped with the external screw thread on the screw propulsion pole, the inboard of sheathed tube entry end be equipped with with the screw propulsion pole on the internal thread that closes of outer thread to match, the inboard of sheathed tube exit end is equipped with the elasticity piece, the utility model discloses simple structure, convenient to use can protect chalk user's skin, prevents rupture and waste in the chalk use.
Description
Technical field
The utility model relates to a kind of teaching tool, particularly relates to a kind of chalk sleeve.
Background technology
Chalk is writing implement conventional in daily teaching, the main component of chalk has calcium carbonate, calcium sulfate and calcium oxide, and these compositions are not easily decomposed, and particle is larger, when writing, chalk powder can drop user on hand with on health, affect the health of user, especially often use the teaching person of chalk, the finger that hold chalk is often corroded dry wizened by chalk powder, if user has wound on hand, then corroded by chalk powder, more difficult recovery.In addition, because chalk is hard and crisp, in use easily fracture, and time chalk uses shorter, can not write with having held, can only abandon, cause the waste of resource and certain environmental pollution.
Utility model content
The utility model provides a kind of chalk sleeve, and structure is simple, easy to use, can protect the skin of chalk user, prevent fractureing and wasting in chalk use procedure.
The utility model is for solving the problems of the technologies described above by the following technical solutions: a kind of chalk sleeve, comprise the sleeve pipe of hollow, it is characterized in that, the arrival end of described sleeve pipe is provided with screw propulsion rod, screw propulsion rod is provided with external screw thread, the inner side of the arrival end of sleeve pipe is provided with the internal thread matched with the external screw thread on screw propulsion rod, and the inner side of the port of export of sleeve pipe is provided with elastomer block.
Described elastomer block is provided with 2 to 4, is evenly laid in the inner side of the port of export of sleeve pipe.
Described elastomer block be ganoid arc block.
The end cap that the top of described screw propulsion rod grips when being provided with for rotating propelling, end cap outer wall is provided with the depression one being convenient to grip.
The outer wall of described sleeve pipe is provided with the depression two being convenient to when writing grip.
Described sleeve pipe is gum sleeve.
Described screw propulsion rod is plastic bar, and described end cap is plastic end cover.
The utility model adopts above technical scheme, compared with prior art, there is following technique effect: structure is simple, manufacture and easy to use, during use, chalk is loaded, one end that chalk is thinner is positioned at the port of export, thicker one end is positioned at arrival end, chalk can load from the port of export, also screw propulsion rod can be screwed out, load from arrival end, and then by screw propulsion rod precession sleeve, the chalk clamping that elastomer block inside the port of export can will load, because chalk sleeve is in sleeve, the finger of user can be avoided to be stained with chalk powder, thus the skin of protection user, also prevent the fracture of chalk simultaneously, when chalk uses shorter, rotating screw pushing ram, can be extrapolated by chalk, continue to use, extend the service life of chalk, cut the waste and environmental pollution.
Accompanying drawing explanation
Fig. 1 is configuration diagram figure of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, the technical solution of the utility model is described in further detail.
As shown in Figure 1, a kind of chalk sleeve, comprise the sleeve pipe 1 of hollow, it is characterized in that, the arrival end of described sleeve pipe 1 is provided with screw propulsion rod 2, screw propulsion rod 2 is provided with external screw thread, the inner side of the arrival end of sleeve pipe 1 is provided with the internal thread matched with the external screw thread on screw propulsion rod 2, when the chalk exposed outside sleeve pipe 1 uses, chalk in sleeve pipe 1 is released to continue to use by rotatable screw propulsion rod 2, the inner side of the port of export of sleeve pipe 1 is provided with 2 to 4 elastomer block 3, evenly be laid in the inner side of the port of export of sleeve pipe 1, elastomer block 3 is ganoid arc block, chalk can clamp by elastomer block 3, when preventing from using, chalk rocks or skids off sleeve pipe 1.
The end cap 4 that the top of screw propulsion rod 2 grips when being provided with for rotating propelling, end cap 4 outer wall is provided with the depression 1 being convenient to grip.The outer wall of sleeve pipe 1 is provided with the depression 26 being convenient to when writing grip, more comfortable when user writes.Sleeve pipe 1 is gum sleeve.Screw propulsion rod 2 is plastic bar, and end cap 4 is plastic end cover.
Be described in detail specific embodiment of the utility model above, but it is as example, the utility model is not restricted to specific embodiment described above.To those skilled in the art, any equivalent modifications that this practicality is carried out and substituting also all among category of the present utility model.Therefore, not departing from the equalization conversion and amendment done under spirit and scope of the present utility model, all should be encompassed in scope of the present utility model.
Claims (7)
1. a chalk sleeve, comprise the sleeve pipe of hollow, it is characterized in that, the arrival end of described sleeve pipe is provided with screw propulsion rod, screw propulsion rod is provided with external screw thread, the inner side of the arrival end of sleeve pipe is provided with the internal thread matched with the external screw thread on screw propulsion rod, and the inner side of the port of export of sleeve pipe is provided with elastomer block.
2. a kind of chalk sleeve according to claim 1, is characterized in that, described elastomer block is provided with 2 to 4, is evenly laid in the inner side of the port of export of sleeve pipe.
3. a kind of chalk sleeve according to claim 1, is characterized in that, described elastomer block be ganoid arc block.
4. a kind of chalk sleeve according to claim 1, is characterized in that, the end cap gripped when the top of described screw propulsion rod is provided with for rotating propelling, and end cap outer wall is provided with the depression one being convenient to grip.
5. a kind of chalk sleeve according to claim 1, is characterized in that, the outer wall of described sleeve pipe is provided with the depression two being convenient to when writing grip.
6. a kind of chalk sleeve according to claim 1, is characterized in that, described sleeve pipe is gum sleeve.
7. a kind of chalk sleeve according to claim 4, is characterized in that, described screw propulsion rod is plastic bar, and described end cap is plastic end cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520536883.8U CN204977924U (en) | 2015-07-22 | 2015-07-22 | Chalk sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520536883.8U CN204977924U (en) | 2015-07-22 | 2015-07-22 | Chalk sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204977924U true CN204977924U (en) | 2016-01-20 |
Family
ID=55112331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520536883.8U Expired - Fee Related CN204977924U (en) | 2015-07-22 | 2015-07-22 | Chalk sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204977924U (en) |
-
2015
- 2015-07-22 CN CN201520536883.8U patent/CN204977924U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 Termination date: 20160722 |