| 摘要 |
<p>A medical needle safety device (20) includes a needle mount (30) for supporting the needle (21) and a needle shielding sleeve (31) surrounding a supported needle coaxially with the mount, for sliding from a needle shielding position towards a non-shielding position. The mount (30) provides a sliding surface (39) and a resiliently flexible finger (34) is provided on the sleeve, the finger being resiliently deformed outwardly as the sleeve moves towards a non- shielding position, to urge the sleeve back to a shielding position. A control member (44) is disposed within the sleeve and the inner surface of the finger has a camming surface (41) with a transition profile (42) between the inner surface and camming surface. On initial rearward movement of the sleeve, the control member interacts with the camming surface of the finger to flex the finger outwardly and store energy therein. Further rearward movement of the sleeve transfers the inner surface of the finger on to the sliding surface (39) of the mount (30) whereby the stored energy in the finger (34) urges the sleeve forwardly to the shielding position.</p> |
