| 摘要 |
The invention concerns an injection system for adjusting a needle useful length, comprising an adjusting ring (1) the rotation whereof relative to the finger press (2) brings about, by screwing or unscrewing, the longitudinal translation of the needle (11) thereby modifying its visible length. It also comprises an elliptical joint (17) bored in its centre with an aperture (22) which provides a sealed storage position and a position releasing the injection. The needle (11) is protected by a needle guard (13) which constitutes a security seal with its fragmented base (12) mechanically engaged in the adjusting ring (1) thread (15). The system is particularly useful for injecting pharmaceutical products. |
