| 摘要 |
An electromagnetic accumulating needleless syringe. The syringe comprises an electrical control device and an impact injection apparatus. The impact injection apparatus comprises a barrel (11 and 21) provided with an inner cavity, a front end cap (12 and 22) fixedly arranged at the front end of the barrel, either an impact armature (13) or an impact element (24) arranged within the barrel and movable in forward and rearward directions, and an electromagnetic coil (14 and 232) fixed within the barrel and used for driving either the impact armature or the impact element to move back and forth when electricity is applied. By means of electric accumulation, energy is accumulated to a certain level then fired at an instant, initial acceleration is great, idle strokes are shortened, and the size of the needleless syringe is reduced. At the same time, direct current is employed in the needleless syringe and a safe voltage can be used, thus increasing the degree of convenience and safeness of use. The needleless syringe has a simple structure, compact size, light weight, and low manufacturing costs. |
