| CPC A61M 5/5086 (2013.01) [A61M 5/2033 (2013.01); A61M 5/24 (2013.01); A61M 5/2448 (2013.01); A61M 5/3202 (2013.01); A61M 2205/43 (2013.01); A61M 2205/581 (2013.01)] | 27 Claims |
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1. A drug delivery device comprising:
a case comprising an audible indicator comprising
a resilient force member configured to reside in two or more states having two or more different conformations, and
a retaining element;
a needle shroud telescopically coupled to the case and movable between a first extended position relative to the case in which a needle is covered and a retracted position relative to the case in which the needle is exposed; and
a shroud spring arranged to bias the needle shroud distally against the case,
wherein in a relaxed state, the resilient force member is relaxed in a first conformation,
wherein in a biased state, the resilient force member is biased to store energy in a second conformation different from the first conformation,
wherein the resilient force member releases stored energy to generate an audible signal when transitioning from the biased state into the relaxed state due to a transition from the second conformation to the first conformation, the resilient force member is supported by the retaining element in the biased state in order to prevent the transition into the relaxed state, and the resilient force member is configured to be supported by the retaining element when the drug delivery device is in an initial state.
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