| 摘要 |
The invention concerns a disposable injection device comprising a pre-filled syringe (1), a syringe body (5) integral with said syringe and a protective case (10), said syringe body and protective case being provided with means (9, 14, 15, 21) for being relatively blocked in translation enabling their relative displacement between an injecting position and a protecting position after being used. The invention is characterised in that said injection device comprises a locking ring (23) provided with digital support means (24), and with locking members (25) capable of locking the syringe body (5) and the protective case (10), in their injecting position during injection, and of moving axially so as to allow the relative displacement of said syringe body and protective case towards their protecting position after use by the effect of elastic means (27), only once the plunger (4) has reached the end of its stroke.
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