| 摘要 |
The invention concerns a self-retracting syringe needle comprising a body (1) supporting an injection needle, a plunger (4), a sheath (5) enclosing the body (1), a spring (6) arranged between the sheath (5) and the body (1), flexible pins (7) co-operating as limit stop with the body (1) to define a first position blocking the body (1) relative to the sheath (5) in a first direction. The syringe comprises a circlip (9) mounted around the body (1) in a position compressed between the sheath (5) and the body (1) in the first blocking position and in a released position in the second blocking position, the circlip (9) having at least one part (9a) with external contour of greater dimension than the sheath (5) internal dimension to block the body (1) in the sheath (5) when it is in the second blocking position, in the direction opposite to the first.
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