| 摘要 |
A safety structure for covering a syringe needle includes a safety sleeve and a hub provided with a sideward projection. The safety sleeve is fitted around the hub and provided with an axial sliding slot, a locating slot laterally extended from the sliding slot, a locating hole located at a bottom of the locating slot behind a locating section, and two opposing protrusions located in the locating slot between the sliding slot and the locating section. When the projection is abutted on a bottom of the sliding slot, the needle is exposed from the safety sleeve; when the projection is reversibly located behind the two opposing protrusions, the needle is temporarily enclosed in the safety sleeve and protected against contamination; and when the projection is moved behind the locating section into the locating hole, the needle is permanently enclosed in the safety sleeve without the risk of stabbing a user.
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