种新型粉笔套

本发明提供了种新型粉笔套，属于教学用具领域。它解决了现有粉笔套上的粉笔会落下粉笔灰的问题。本新型粉笔套包括前端设有插孔的套体，插孔上插有粉笔，套体外侧还套有护套，套体外壁设有滑槽，滑槽靠近套体前端和后端分别具有前挡沿和后挡沿，护套内壁设有滑块，滑块套置于滑槽内，滑块和后挡沿之间设有压缩弹簧，还包括支架，支架包括相互平行设置的上支撑板和下支撑板，以及支撑在下支撑板底部的支脚，上支撑板和下支撑板上分别设有圆形上支撑孔和圆形支撑槽，支撑槽槽底还设有圆形下支撑孔。本粉笔套能利用护套挡住粉笔，防止粉笔灰落出，而且使用十分方便。 The invention provides a novel chalk sleeve and belongs to the field of teaching aids. The novel chalk sleeve solves the problem that chalk dust falls from chalk on an existing chalk sleeve. The novel chalk sleeve comprises a sleeve body with an insertion hole in the front end. Chalk is inserted into the insertion hole. The sleeve body is further sleeved with a protective sleeve. A sliding groove is formed in the outer wall of the sleeve body. The portions, close to the front end and the rear end of the sleeve body, of the sliding groove are provided with a front blocking edge and a rear blocking edge respectively. A sliding block is arranged on the inner wall of the protective sleeve and arranged in the sliding groove. A compression spring is arranged