Chalk cover
The utility model discloses a chalk sleeve which can prevent a chalk from contaminating the fingers of a teacher and belongs to the teaching appliances. The sleeve is in screw connection with a rotary rod with an anti-slip head in one end of the sleeve and is longitudinally provided with an open sli...
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Patent |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext bestellen |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| Zusammenfassung: | The utility model discloses a chalk sleeve which can prevent a chalk from contaminating the fingers of a teacher and belongs to the teaching appliances. The sleeve is in screw connection with a rotary rod with an anti-slip head in one end of the sleeve and is longitudinally provided with an open slit, wherein the other end of the open slit has a conic appearance and is in screw connection with a fastening ring with anti-slip screws. The sleeve has the advantages of convenient and sanitary use and simple structure. |
|---|