CN203920110U - Chalk sleeve - Google Patents
Chalk sleeve Download PDFInfo
- Publication number
- CN203920110U CN203920110U CN201420343457.8U CN201420343457U CN203920110U CN 203920110 U CN203920110 U CN 203920110U CN 201420343457 U CN201420343457 U CN 201420343457U CN 203920110 U CN203920110 U CN 203920110U
- Authority
- CN
- China
- Prior art keywords
- chalk
- tubulose body
- cardan shaft
- axial gap
- write
- 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
- 239000013013 elastic material Substances 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical group [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
Landscapes
- Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
Abstract
The utility model relates to stationery, specifically discloses a kind of chalk sleeve.This chalk sleeve comprises tubulose body, and described tubulose body starts to be provided with vertically axial gap from its end, and crossingly with described axial gap is provided with circumferential breach; In described tubulose body, establish cardan shaft; Described cardan shaft is provided with convex button, and it is external that described convex button extends to tubular casing through axial gap and circumferential breach.When use, enter chalk, then insert cardan shaft to tubulose body interpolation, cardan shaft advances chalk to tubulose body front end, then convex button is stuck in circumferential breach cardan shaft is fixed, can be write; When after the wearing and tearing of chalk front end, again repeat this propelling and fixing operation, can continue again to write.When writing, user needn't touch chalk, and clean, do not hinder hand; In addition, due to the length that chalk sleeve has extended chalk, in the time that chalk becomes chalk end, also can continue to write a period of time, reduce waste.
Description
Technical field
The utility model relates to stationery, particularly a kind of chalk sleeve that coordinates chalk to use.
Background technology
Chalk is the instrument widely using in daily life, is generally used for book and writes on the blackboard, and user mostly is teacher.The chalk of domestic use mainly contains two kinds of common chalk and dust-free chalks, and its main component is calcium carbonate (lime stone) and calcium sulfate (gypsum), or containing a small amount of calcium oxide.Approximately two cun, common chalk is long, and thick, a thin truncated cone-shaped are very well-balanced, very firmly very crisp.Because the one-tenth of chalk is grouped into, normal taking can be hindered hand, and chalk dust easily sticks to your hands, unclean.In addition, in the time that chalk is write below, remaining chalk end, due to bad grasping, so only abandon, causes waste.
Utility model content
In view of this, the technical problems to be solved in the utility model is to provide a kind of hand, clean chalk sleeve of not hindering while using chalk.
The technical solution adopted in the utility model is:
A kind of chalk sleeve, comprises tubulose body, and described tubulose body starts to be provided with vertically axial gap from its end, and crossingly with described axial gap is provided with circumferential breach; In described tubulose body, establish cardan shaft; Described cardan shaft is provided with convex button, and it is external that described convex button extends to tubular casing through axial gap and circumferential breach.
Further, described tubulose body front end also extends a circle annular tooth, coordinates described annular tooth to be provided with dead ring, and described dead ring is slidably fixed on outside annular tooth.
Further, described annular tooth is elastic material.
Further, the inner peripheral surface of described annular tooth is provided with the projection of thread-shaped.
The beneficial effects of the utility model:
When chalk sleeve of the present utility model uses, enter chalk, then insert cardan shaft to tubulose body interpolation, cardan shaft advances chalk to tubulose body front end, then convex button is stuck in circumferential breach cardan shaft is fixed, can be write; When after the wearing and tearing of chalk front end, again repeat this propelling and fixing operation, can continue again to write.When writing, user needn't touch chalk, and clean, do not hinder hand; In addition, due to the length that chalk sleeve has extended chalk, in the time that chalk becomes chalk end, also can continue to write a period of time, reduce waste.
Brief description of the drawings
Below in conjunction with drawings and Examples, the utility model is further described.
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
Below with reference to accompanying drawing, the utility model is elaborated, as shown in Figure 1: the chalk sleeve of the present embodiment, comprise tubulose body 7, described tubulose body 7 starts to be provided with vertically axial gap 1 from tool end, and crossingly with described axial gap 1 is provided with circumferential breach 2; In described tubulose body 7, establish cardan shaft 3; Described cardan shaft 3 is provided with convex button 4, and described convex button 4 extends to outside tubulose body 7 through axial gap 1 and circumferential breach 2.When use, to the interior insertion chalk of tubulose body 7, then insert cardan shaft 3, cardan shaft 3 advances chalk to tubulose body 7 front ends, then convex button 4 is stuck in circumferential breach 2 fixing cardan shaft 3, can write; When after the wearing and tearing of chalk front end, again repeat this propelling and fixing operation, can continue again to write.
As the further improvement of technique scheme, described tubulose body 7 front ends also extend a circle annular tooth 5, coordinate described annular tooth 5 to be provided with dead ring 6, and described dead ring 6 is slidably fixed on outside annular tooth 5.When chalk top be pushed into axle 3 push up outer to annular tooth 5 after, slip dead ring 6 lock rings, outside annular tooth 5, can be fixed chalk firmly, reduce chalk in writing process, rotate or come off; In the time that chalk becomes chalk end, also can be more steady fix chalk end, be convenient to write.
As the further improvement of technique scheme, described annular tooth 5 is elastic material.Described elastic material comprises plastics, softer metal etc., and elastic material has certain deformation, is convenient to the insertion of chalk and the clamping of annular tooth 5.
As the further improvement of technique scheme, the inner peripheral surface of described annular tooth 5 is provided with the projection of thread-shaped.Screw thread increases the friction between chalk and annular tooth 5, further fixedly secures chalk, is convenient to write.
Finally explanation is, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical solution of the utility model, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (4)
1. a chalk sleeve, comprise tubulose body (7), it is characterized in that: described tubulose body (7) starts to be provided with vertically axial gap (1) from its end, and be provided with circumferential breach (2) crossing with described axial gap (1); In described tubulose body (7), establish cardan shaft (3); Described cardan shaft (3) is provided with convex button (4), and described convex button (4) extends to outside tubulose body (7) through axial gap (1) and circumferential breach (2).
2. chalk sleeve according to claim 1, it is characterized in that: described tubulose body (7) front end also extends a circle annular tooth (5), coordinate described annular tooth (5) to be provided with dead ring (6), described dead ring (6) is slidably fixed on outside annular tooth (5).
3. chalk sleeve according to claim 2, is characterized in that: described annular tooth (5) is elastic material.
4. according to the chalk sleeve described in claim 2 or 3, it is characterized in that: the inner peripheral surface of described annular tooth (5) is provided with the projection of thread-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420343457.8U CN203920110U (en) | 2014-06-17 | 2014-06-17 | Chalk sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420343457.8U CN203920110U (en) | 2014-06-17 | 2014-06-17 | Chalk sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203920110U true CN203920110U (en) | 2014-11-05 |
Family
ID=51815978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420343457.8U Expired - Fee Related CN203920110U (en) | 2014-06-17 | 2014-06-17 | Chalk sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203920110U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107116930A (en) * | 2017-04-25 | 2017-09-01 | 怀化学院 | A kind of dust-proof propelling chalk sleeve |
-
2014
- 2014-06-17 CN CN201420343457.8U patent/CN203920110U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107116930A (en) * | 2017-04-25 | 2017-09-01 | 怀化学院 | A kind of dust-proof propelling chalk sleeve |
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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 |
Granted publication date: 20141105 Termination date: 20150617 |
|
| EXPY | Termination of patent right or utility model |