CN201597308U - Rotary chalk special sleeve - Google Patents
Rotary chalk special sleeve Download PDFInfo
- Publication number
- CN201597308U CN201597308U CN2009203524874U CN200920352487U CN201597308U CN 201597308 U CN201597308 U CN 201597308U CN 2009203524874 U CN2009203524874 U CN 2009203524874U CN 200920352487 U CN200920352487 U CN 200920352487U CN 201597308 U CN201597308 U CN 201597308U
- Authority
- CN
- China
- Prior art keywords
- chalk
- threads
- special sleeve
- rotary
- special
- 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
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Landscapes
- Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
Abstract
The utility model discloses a rotary chalk special sleeve, which belongs to teaching supplies. The chalk special sleeve comprises an outer tube with inner threads and a chalk clamp with outer threads, the chalk clamp with the outer threads are arranged inside the outer tube with the inner threads and meshes with the same via the threads, and a chalk is placed from the bottom of the chalk clamp with the outer threads to be clamped on the chalk clamp. The special sleeve is convenient in use and low in cost, and prevents fingers from being burnt and desquamated as hands do not contact with the chalk directly when in writing and drawing.
Description
Technical field
The utility model belongs to realia, the special-purpose cover of particularly a kind of rotary chalk, and the special-purpose cover of this rotary chalk has easy to use, with low cost, and hand does not directly contact with chalk when writing picture, avoids finger by the burn decortication.
Background technology
Teacher always is stained with many chalk foams on hand when blackboard writes, time one length will cause a lot of troubles to the decortication of finger burn to teacher, and the harm teacher's is healthy.
The utility model content
Technical assignment of the present utility model is to provide a kind of rotary chalk special-purpose cover at above prior art deficiency.
The technical scheme that its technical problem that solves the utility model adopts is: described multipurpose parasols is with externally threaded chalk folder to form by a tapped urceolus and one, be with externally threaded chalk to fold up in tapped urceolus, by screw-threaded engagement together, chalk is put into from the bottom of chalk folder, is stuck on the chalk folder.
The utlity model has following beneficial effect:
1, easy to use, with low cost;
Hand does not directly contact with chalk when 2, writing picture, avoids finger by the decortication etc. of burning.
Description of drawings
Accompanying drawing 1 is the utility model structural representation.
The specific embodiment
With reference to Figure of description the utility model is done following detailed description the in detail:
As shown in Figure 1, the special-purpose cover of a kind of rotary chalk, be with externally threaded chalk folder 2 to form by a tapped urceolus 1 and one, wherein be with externally threaded chalk folder 2 to be placed in the tapped urceolus 1, by screw-threaded engagement together, chalk 3 is stuck on the chalk folder 2 from putting into the bottom of externally threaded chalk folder 2.
Claims (1)
1. a rotary chalk special use is overlapped, it is characterized in that: the special-purpose cover of described chalk is with externally threaded chalk folder to form by a tapped urceolus and one, be with externally threaded chalk to fold up in tapped urceolus, by screw-threaded engagement together, chalk is stuck on the chalk folder by the bottom of chalk folder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203524874U CN201597308U (en) | 2009-12-24 | 2009-12-24 | Rotary chalk special sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203524874U CN201597308U (en) | 2009-12-24 | 2009-12-24 | Rotary chalk special sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201597308U true CN201597308U (en) | 2010-10-06 |
Family
ID=42808357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203524874U Expired - Fee Related CN201597308U (en) | 2009-12-24 | 2009-12-24 | Rotary chalk special sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201597308U (en) |
-
2009
- 2009-12-24 CN CN2009203524874U patent/CN201597308U/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: 20101006 Termination date: 20101224 |