It solves the problems, such as: suitably and higher to play the dynamic needleless injector of injection.SOLUTION: needleless injector includes: that the main body of this needleless injector of injector body has slideway, is connected to the main body that front end face is arranged in opening, body interior One fixing piece is slidably disposed on the slideway with accommodating portion, for accommodate the substance being injected to be discharged Apply the sliding maintaining part direction opening holding section of energy with driving portion, which is arranged in proximity to accommodating portion, when the maintaining part contact openings of the contact position of holding part and the slideway path of anti-sliding stop. Receiving portion is formed in order to avoid penetrating along axial holding section, when energy is applied to holding area in Slideslip slideway in initial position driven part, the holding part and contacts opening in contact position. Therefore, the opening will be injected through in the receiving portion for the substance being injected.In selected attached drawing: Fig. 3COPYRIGHT:(C) 2016, JPO& INPIT
