| 摘要 |
A safety needle assembly includes a needle having a longitudinal axis, a length, a pointed distal end, a proximal end and a passageway therethrough. The assembly includes a hub having a longitudinal axis, a proximal end, a distal end and an outside surface with an outside diameter. The hub has an axial opening through it for receiving the needle so that the distal end of the needle projects outwardly. The hub has a circumferential groove in the outside surface and a raised annulus located proximally to the groove. The assembly includes a shield with an open end, a closed end, a sidewall with a longitudinal slot extending from the open end toward the closed end. The shield has a first position exposing the needle and a second position wherein the shield obstructs unintentional access to the needle. The shield has a mounting for holding the shield onto the hub with a first portion having an opening for placement on the hub at the groove. The opening has at least one inward projection sized to fit within the groove and rotatably hold the mounting on the hub. The mounting attaches to the shield with a hinge opposite the slot, so that when the slot is moved from the first position to the second position, the slot provides clearance for the needle. The shield further includes at least one lug to engage the annulus and lock the shield in the second position
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