Safety vacuum syringe for blood sampling conformed to ergonomics

A safety vacuum syringe for blood sampling conformed to ergonomics, comprising:

• a needle head having a cannula needle with an outer needle tip and an inner needle tip respectively at opposite ends, and a needle holder to hold said cannula needle at a middle thereof;
• a barrel having an eccentric reduced front portion with a reduced inlet thereat, an outward flange disposed to a bottom opening end, and two longitudinal guide strips disposed on an inside wall at one side nearest to said eccentric reduced inlet thereof;
• an eccentric reduced lining tube inserted in said eccentric reduced portion of said barrel having a hook-shaped inward flange disposed at a bottom end thereof;
• a vacuum container form of a cylindrical body having a front opening sealed by a plug, and a guide block disposed on an outside of said cylindrical body near said front opening thereof;
• a tubular connector provided between said reduced lining tube and said vacuum container having a hook-teethed outward flange disposed to a front end, an outward flange with two guide notches disposed to a bottom end thereof, and four breakable connecting flaps extended downwardly from a bottom and connected to said plug of said container;
• and characteristically
• a reversible front cover and a reversible rear cover which can be pressed into said barrel in a reversed manner after using respectively through said reduced inlet and said bottom opening of said barrel to destroy both needle tips thoroughly in said barrel.