Liquid dosage instrument

Liquid dosage device comprises a cylindrical body filled with a liquid, having a distal end side needle tip, provided at the front end side of the cylindrical body, the cylindrical body and communicatively needle tube, a gasket capable of sliding in the tubular body, an operating member for performing a pressing operation for discharging the liquid from the needle tube to press against the gasket in the distal direction, between a first position covering a regulating capable regulating member pressed, the distal end side needle tip, the tip Gawahari destination There a cover member movable to a second position exposing, the regulating member, projections formed to protrude, the operation member is formed with a groove protrusion is inserted, the grooves a longitudinal groove formed along the operation direction in the same direction during the pressing operation, communicates with the longitudinal groove, and a transverse groove formed along a direction perpendicular to the operating direction, the cover member is first when in position, projections located in lateral grooves, to regulate the pressing operation, or the cover member is a first position When moved to the second position, it moves to the flutes from projections in conjunction with the movement of the lateral groove, thereby pressing operation becomes possible.