Multifunctional chalk cover

The utility model discloses a multifunctional chalk cover, but the outer tube of suit and inner tube, the cross section diameter of inner tube anterior segment pipe is less than the cross section diameter of back end pipe, and inner tube front nozzle is the collapsible formula elasticity mouth of pipe, and outside the overlapping of the collapsible formula elasticity mouth of pipe has reset spring, outer tube front nozzle is the conical duct, and the reset spring external diameter is less than the cross section external diameter of back end pipe and is greater than the front nozzle's of outer tube internal diameter, is equipped with the screens on the inner tube front nozzle outer wall, and the inner tube is located to correspond along the mouth of pipe with the end of outer tube and is equipped with the rectangle opening, and the rectangle opening part is equipped with and pushes away a ware. The utility model discloses the length of chalk when simple structure, reasonable in design not only can automaticall