CN201325240Y - Novel chalk sleeve - Google Patents
Novel chalk sleeve Download PDFInfo
- Publication number
- CN201325240Y CN201325240Y CNU2008201561785U CN200820156178U CN201325240Y CN 201325240 Y CN201325240 Y CN 201325240Y CN U2008201561785 U CNU2008201561785 U CN U2008201561785U CN 200820156178 U CN200820156178 U CN 200820156178U CN 201325240 Y CN201325240 Y CN 201325240Y
- Authority
- CN
- China
- Prior art keywords
- chalk
- chalk sleeve
- flexure strip
- novel
- novel chalk
- 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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Abstract
The utility model discloses a novel chalk sleeve, which is in hollow cylinder shape. The novel chalk sleeve sequentially comprises a limiting portion and an elastic sheet from top to bottom, the radius of the cross section of the chalk sleeve from top to bottom is reduced frequently, the upper portion of the inner side of the limiting portion is equipped with a circle of limiting raised ridges, and the elastic sheet is in tooth shape. The novel chalk sleeve not only can prevent fingers from being dirtied by chalk dust, but also can prevent chalks from being broken, and is simple in structure and convenient in use.
Description
Technical field
The utility model discloses a kind of novel chalk casing, be specially a kind of chalk sleeve that prevents the chalk fracture.
Background technology
Chalk is one of indispensable instrument in the teaching process, although present electronic classroom enlarges gradually, but still does not substitute traditional classroom instruction.Because chalk is thinner, in teacher's writing process, is fractureed through regular meeting.And the teacher is in writing process, and chalk dust sticks on the finger, and then is put on the clothing very unclean.Although, have at present many write, erase the board about chalk designed the measure that much prevents dust in the process, these design most complex structures, use also inconvenient.
The utility model content
Goal of the invention of the present utility model is in order a kind of chalk sleeve to be provided, both can to have prevented to point and be infected with chalk dust, can preventing that again chalk from fractureing.
The purpose of this utility model can be achieved through the following technical solutions.
Novel chalk casing, described chalk sleeve is a hollow columnar, it comprises two parts: be followed successively by limited section and flexure strip from top to bottom, the radius of cross section from top to bottom reduces gradually; It is protruding stupefied that described limited section inside upper part is provided with a circle qualification, and described flexure strip is a dentation.
In order more to adapt to the insertion of chalk, can with limit protruding stupefied be elastic material.
Principle of the present utility model is: because the end direction of flexure strip draws in, therefore, flexure strip opened when chalk inserted, and expose nib and be easy to, and in case after exposing nib, flexure strip clamps nib and stops it to retreat; Be complementary with chalk and limit protruding stupefied making with combining of flexure strip, therefore, chalk is stressed evenly not easily broken.
By the chalk sleeve that the utility model designs, have both can prevent to point and be infected with chalk dust, can prevent the advantage that chalk fractures again, and simple in structure, easy to use.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the longitudinal profile schematic diagram of Fig. 1;
Fig. 3 is the user mode figure of embodiment;
Among the figure: 1, limited section 2, flexure strip 3, protruding stupefied
The specific embodiment
Further set forth technical characterstic of the present utility model below in conjunction with accompanying drawing and specific embodiment.
Novel chalk casing as depicted in figs. 1 and 2, described chalk sleeve is a hollow columnar, it comprises two parts: be followed successively by limited section 1 and flexure strip 2 from top to bottom, the radius of cross section from top to bottom reduces gradually; Described limited section 1 inside upper part is provided with a circle and limits protruding stupefiedly 3, and described flexure strip 2 is a dentation.
Embodiment
As shown in Figure 3, when chalk inserted, the chalk head strutted the flexure strip 2 of gathering until exposing suitable length, and flexure strip 2 ends are absorbed in the chalk, and chalk is difficult for returning.Qualification protruding stupefied 3 in the limited section 1 and flexure strip 2 common restriction chalks, make on the chalk stressed evenly, not easily broken.
And what the writer pointed direct contact is chalk sleeve, and therefore, no chalk dust is infected with on finger.
Claims (2)
1, novel chalk casing is characterized in that: described chalk sleeve is a hollow columnar, and it comprises two parts: be followed successively by limited section (1) and flexure strip (2) from top to bottom, the radius of cross section from top to bottom reduces gradually; Described limited section (1) inside upper part is provided with a circle and limits protruding stupefied (3), and described flexure strip (2) is a dentation.
2, novel chalk casing according to claim 1 is characterized in that: limit protruding stupefied (3) and be elastic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201561785U CN201325240Y (en) | 2008-11-28 | 2008-11-28 | Novel chalk sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201561785U CN201325240Y (en) | 2008-11-28 | 2008-11-28 | Novel chalk sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201325240Y true CN201325240Y (en) | 2009-10-14 |
Family
ID=41177219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201561785U Expired - Fee Related CN201325240Y (en) | 2008-11-28 | 2008-11-28 | Novel chalk sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201325240Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106976337A (en) * | 2017-04-25 | 2017-07-25 | 南浔善琏伟龙笔庄 | A kind of writing brush pen cap |
-
2008
- 2008-11-28 CN CNU2008201561785U patent/CN201325240Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106976337A (en) * | 2017-04-25 | 2017-07-25 | 南浔善琏伟龙笔庄 | A kind of writing brush pen cap |
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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: 20091014 Termination date: 20101128 |