| 摘要 |
A safety device for a medical needle having a sharp tip and a mount spaced from the tip includes a tubular support for the needle mount and a protective sleeve carried by the support for sliding movement between a retracted position and a protecting position. A slot is formed in the sleeve with portions of greater width at the forward and rearward ends of the slot. The tubular support has a guide element slidably received in the slot and a locking element deformable inwardly of the sleeve and receivable in the greater width portions of the slot. The locking element is profiled to permit forward sliding movement of the sleeve from its retracted position but when received in the rearward portion of the slot, then resists rearward sliding movement of the sleeve.
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