CN201566280U - Break-proof chalk sleeve - Google Patents
Break-proof chalk sleeve Download PDFInfo
- Publication number
- CN201566280U CN201566280U CN2009202846387U CN200920284638U CN201566280U CN 201566280 U CN201566280 U CN 201566280U CN 2009202846387 U CN2009202846387 U CN 2009202846387U CN 200920284638 U CN200920284638 U CN 200920284638U CN 201566280 U CN201566280 U CN 201566280U
- Authority
- CN
- China
- Prior art keywords
- chalk
- break
- chalk sleeve
- sleeve
- safe edge
- 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 relates to a break-proof chalk sleeve, which is characterized in that an elastic safe edge with an axial equal-divided opening is arranged at the upper part of the break-proof chalk sleeve; the front part of the break-proof chalk sleeve is tightly clung to the chalk; a cylindrical casing with inner screw threads is arranged at the lower part of the sleeve, and the screw threads are matched and meshed with screw threads on the outer surface of a propelling seat; and a groove is formed at the front part of the propelling seat. The break-proof chalk sleeve can prevent chalks from breaking, and has the advantages of simple structure and convenient use, thereby deserving popularization.
Description
Technical field
The utility model relates to a kind of chalk head of the usefulness of imparting knowledge to students, specifically a kind of anti-breaking chalk sleeve.
Background technology
At present, at daily teaching in class, the chalk head usually can rupture, and it is very inconvenient to use.
The utility model content
In order to solve awkward problem behind the chalk head rupture, the utility model provides a kind of anti-breaking chalk sleeve, and this anti-breaking chalk sleeve is effectively anti-breaking, and is practical and convenient.
The technical scheme that its technical problem that solves the utility model adopts is: this utility model comprises chalk, elasticity safe edge, the pen cap, advance seat, this anti-breaking chalk sleeve top is the elasticity safe edge of axial five equilibrium opening, chalk is close in this elasticity safe edge front portion, can prevent that chalk from fractureing, the bottom of this pen cap is a threaded tubular shell in inside, the engagement of the screwed advance seat coupling of this screw thread and outer surface, the advance seat front portion has groove, the chalk of can packing into, during use, advance seat advances chalk, and chalk extends through the elasticity safe edge, can make not frangibility of chalk.
The beneficial effects of the utility model are: this anti-breaking chalk sleeve prevents fracture, and simple in structure, easy to use, is worthy to be popularized.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Accompanying drawing 1 is a structural principle schematic diagram of the present utility model.
Among the figure, 1. chalk, 2. elasticity safe edge, the 3. pen cap, 4. advance seat.
The specific embodiment
In the drawings, this utility model comprises chalk 1, elasticity safe edge 2, the pen cap 3, advance seat 4, this anti-breaking chalk sleeve top is the elasticity safe edge 2 of axial five equilibrium opening, chalk is close in these elasticity safe edge 2 front portions, can prevent that chalk from fractureing, the bottom of this pen cap 3 is a threaded tubular shell in inside, the screwed advance seat 4 coupling engagements of this screw thread and outer surface, advance seat 4 front portions have groove, the chalk of can packing into, during use, advance seat 4 advances chalks 1, chalk 1 extends through elasticity safe edge 2, can make not frangibility of chalk 1.
Claims (1)
1. anti-breaking chalk sleeve, this utility model comprises chalk (1), elasticity safe edge (2), the pen cap (3), advance seat (4), it is characterized in that: this anti-breaking chalk head top is the elasticity safe edge (2) of axial five equilibrium opening, chalk is close in this elasticity safe edge (2) front portion, the bottom of this pen cap (3) is a threaded tubular shell in inside, the engagement of the screwed advance seat of this screw thread and outer surface (4) coupling, the front portion of advance seat (4) has groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202846387U CN201566280U (en) | 2009-12-18 | 2009-12-18 | Break-proof chalk sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202846387U CN201566280U (en) | 2009-12-18 | 2009-12-18 | Break-proof chalk sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201566280U true CN201566280U (en) | 2010-09-01 |
Family
ID=42658567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202846387U Expired - Fee Related CN201566280U (en) | 2009-12-18 | 2009-12-18 | Break-proof chalk sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201566280U (en) |
-
2009
- 2009-12-18 CN CN2009202846387U patent/CN201566280U/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: 20100901 Termination date: 20101218 |