Safety mechanism of drug delivery device and drug delivery device having the same

摘要

The present disclosure relates to a safety mechanism (27) for a drug delivery device for preventing actuation of the drug delivery device in the event of a mechanical shock. The safety mechanism (27) comprises a drug delivery member sleeve (7) and a proximal flange (9) provided at the proximal end of the drug delivery member sleeve (7), wherein the proximal flange (9) Configured to receive a proximal flange (9) having a first radially flexible arm (9a) extending longitudinally in the distal direction and a distal portion of the drug delivery member sleeve (7). A housing (3) having a central proximal opening (3a) wherein the drug delivery member sleeve (7) is pivoted from an extended position to a retracted position relative to the housing (3) within the housing (3) A housing (3) that is displaceable in a direction and a cover (5) having a drug delivery member sleeve (7) and a distal opening (5a) forming a channel configured to receive the housing (3). Prepare. The housing (3) includes a first radially flexible arm (9a) and an outer surface of the drug delivery member sleeve (7) when the drug delivery member sleeve (7) is displaced from the extended position toward the retracted position. And a proximal portion (3b) disposed between. The channel allows the drug delivery member sleeve (7) to be in a retracted position between the inner surface of the cover (5) and the outer surface of the proximal portion (3b) when the housing (3) is received by the cover (5). Is dimensioned such that there is a radial distance smaller than the radial dimension of the first radially flexible arm (9a), which prevents