| 摘要 |
PROBLEM TO BE SOLVED: To enable the environmental pollution-free reclamation and incineration disposition of the nozzle of a needless syringe of an injection type provided with the nozzle having a jet injection hole of an injection solution at its front end by forming the material of the nozzle of a biodegradable resin formed from polylactic acid. SOLUTION: The nozzle 1 of the needless syringe inhales a medicinal liquid at the retreat of a piston 4 and injects the medicinal liquid at the advance thereof. A front side cylindrical part 3 is screwed with the nozzle 1 at its front end side and is opened with a medicinal liquid amount display window 2 in its outer peripheral part. A latch mechanism 6 of a rear side cylindrical part 8 connects the piston 4 inserted into the nozzle 1, latches an advancing and retreating rod 5 and releases the latching state by an unlatching button 7. The front side cylindrical part 3 and the rear side cylindrical part 8 are screwed by a threaded part 9. The nozzle 1 is formed of the injection hole 1a for injecting the medicinal liquid, a hollow part for inhaling the medicinal liquid and the threaded part provided with a flange part and a lacking part on its outside. The material of the nozzle is formed of the biodegradable resin formed from the polylactic acid. |
