| 摘要 |
The invention concerns a device for protecting an injection syringe cannula or needle comprising a cannula support (1) forming a cartridge-holder, whereon slides a guard (2), thereby allowing the cannula to be sheathed and unsheathed successively only once. An elastic half-ring is mounted on the guard (2), the free ends thereof co-operating respectively with two openings (2D, 2'D) of the guard (2). The support (1) comprises two slots for irreversibly receiving said half-ring free ends when the cannula is completely covered after injection. Said slots are diametrically opposite and placed near the cannula. The support (1) further comprises at least one first member for locking (1D) the guard (2), arranged behind one of said slots, at 90 DEG relative to the support (1) horizontal median plane, and at least a second member for locking (1F) said guard, behind and aligned with the member (1D).
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