| CPC A61M 5/2033 (2013.01) [A61M 5/3204 (2013.01); A61M 2005/3267 (2013.01)] | 20 Claims |
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1. A medicament delivery device comprising:
a housing comprising a proximal end and a distal end;
a needle and a needle cover,
wherein the needle cover is axially movable between an extended position, in which the needle cover extends from the distal end of the housing and covers a distal end of the needle, and a retracted position, in which the needle cover is located in a position proximal to the extended position such that the needle protrudes from a distal end of the needle cover;
a needle cover biasing member configured to bias the needle cover axially in a distal direction towards the extended position;
a drive mechanism comprising a drive member, and a plunger rod configured to move from a proximal position to a distal position under the force of the drive member; and
a needle cover extension mechanism comprising
a second biasing member configured to bias the needle cover into the extended position post-use of the medicament delivery device,
a release element having a first state configured to prevent the second biasing member from biasing the needle cover into the extended position and a second state configured to allow the second biasing member to bias the needle cover into the extended position, wherein the release element is in the second state when the plunger rod is in the distal position, and
a second biasing member holder, wherein the release element comprises an engaging portion, wherein the second biasing member holder comprises a clip configured to engage with the engaging portion of the release element when the release element is in the first state and to be disengaged with the engaging portion of the release element when the release element is in the second state.
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