Syringe structure

A syringe structure mainly comprising:

• a hollow needle barrel with a adapter disposed in the front end area thereof and a hold portion formed at the tail end thereof;
• a needle base inserted on the adapter;
• a case cover cased on the needle barrel;
• a push rod and a rubber head inserted at the front end thereof and disposed in the hollow needle barrel to form a push rod structure;
• wherein a plurality of pieces in radiant shapes are disposed on the push rod;
• the rubber head tightly affixes with the inner wall of the needle barrel;
• it is characterized that a tube plug body is embedded in the axle center area to connect with a retaining head;
• a drop retaining ring is disposed inside the adapter of the needle barrel such that when the push rod is pushed forwardly, a retaining lug at the front end of the tube plug body corresponds to retain;
• when the push rod is pulled backwardly, the tube plug body breaks from the retaining head and detaches from the rubber head to make the push rod structure create an air groove due to the detachment of the tube plug body thereby disabling the needle barrel and the push rod structure to be airtight and become self-destructive.