The invention discloses an
injector reducing
residual volume of liquid
medicine. The
injector comprises an
injector cylinder, an injection
piston. The injector cylinder is provided with a nipple. Theinjection
piston is arranged in the injector cylinder. The injector is characterized in that a hole is in the injection
piston, a residual
medicine piston is arranged in the hole of the injection piston, and is cooperated with the hole in a sealed manner. When liquid
medicine is extracted, the injection piston and the injector cylinder are cooperated to extract the liquid medicine. When the liquidmedicine is injected, a piston on the front part of the injection piston discharges medicine of the injector cylinder, and then the residual medicine piston is pushed, a sealing
gasket is cooperatedwith the nipple, and the sealing
gasket on the front end of a
piston rod completely discharges medicine in the nipple. After completion, a spring
retaining ring and a return spring are cooperated, andthe
piston rod is returned, to complete to inject the medicine. The injector is simple in structure, convenient in operation, and is safe and reliable. The injector can completely
discharge residuesin the nipple, medicine injection
dose is more accurate, and medicine waste is eliminated, medication effect and
curative effect are guaranteed, and cost of a patient is reduced.