Safety device for a pre-filled syringe and injection device

摘要

A safety device for a pre-filled syringe comprises a hollow support body to retain the pre-filled syringe therein, a hollow needle shield that is slidable relative to the support body and guiding means for guiding the movement of the needle shield relative to the support body. The guiding means comprise a deflectable flexible arm, a guide pin and a guide track. The deflectable flexible arm extends essentially parallel to a central axis of the safety device. The guide pin extends radial from the flexible arm. The guide track guides the guide pin within and along the guide track when the needle shield is slid relative to the support body.

主权项

1. A safety device for a pre-filled syringe, comprising:
an outer body; a hollow support body to retain the pre-filled syringe therein, wherein the hollow support body is received in the outer body and slidably arranged relative to the outer body to perform an injection stroke; a hollow needle shield slidable relative to the support body; and a guiding mechanism to guide the movement of the needle shield relative to the support body, the guiding mechanism comprising
a deflectable flexible arm with a guide pin radially extending therefrom, the flexible arm extending essentially parallel to a central axis of the safety device, anda guide track configured to guide the guide pin within and along the guide track so that the guide pin follows the guide track when the needle shield is slid relative to the support body, wherein the flexible arm is configured to be laterally deflected as the guide pin follows the guide track, and wherein the flexible arm is connected to or is integrally formed to the needle shield or the support body, and the guide track is formed into the other of the needle shield or the support body.