| 摘要 |
A shielded syringe (10) includes a cylindrical syringe barrel (14) having an interior chamber (16), a needle (20) secured at one end of said barrel (14), and a plunger (26) slidably received within the interior chamber (16). A sheath (32) for preventing contact with said needle (20) is provided with the sheath (32) being slidably disposed on said cylindrical syringe barrel (14) and movable therealong from a closed position surrounding said needle (210) to an open position exposing said needle (20). A locking system for releasably locking the sheath (32) in both the open and closed positions, includes a tab (48) disposed on an inside surface of said sheath (32), an elongate strip member (40) having one end thereof secured to said cylindrical syringe barrel (14), and a pair of berms (42, 44) thereon for engaging said tab. A spring (72) is provided for urging said tab (48) against one of said pair of berms (42, 44) when the sheath (32) is in the open position and in the closed position. |
