| CPC A61M 5/322 (2013.01) [A61M 5/20 (2013.01); A61M 5/3272 (2013.01); A61M 2005/3267 (2013.01); A61M 5/3271 (2013.01)] | 20 Claims |
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1. A medicament delivery device comprising:
a needle for injecting medicament;
a body having a proximal end and a distal end;
a needle cover, wherein the needle cover is proximally movable relative to the body from an initial position to a holding position in which the needle protrudes from the distal end of the needle cover for injecting medicament, and wherein the needle cover is distally movable relative to the body from the holding position to a locked position in which the needle cover covers the distal end of the needle;
a biasing member configured to bias the needle cover distally; and
a guide member configured to rotate relative to the needle cover,
wherein one of the guide member and the needle cover comprises a pin and the other of the guide member and the needle cover comprises a guide path for guiding the pin, wherein the guide path comprises a first ramp, a second ramp and a locking abutment surface,
wherein the pin is positioned at a first position when the needle cover is in the initial position, wherein the first position is external to the guide path, and wherein the first ramp is configured to engage the pin when the needle cover moves axially from the initial position towards the holding position for rotating the guide member relative to the needle cover,
wherein the pin is positioned at a second position when the needle cover is in the holding position, wherein the second ramp is configured to engage the pin when the needle cover moves axially from the holding position towards the locked position for rotating the guide member relative to the needle cover, and
wherein the pin is positioned at a third position when the needle cover is in the locked position, wherein the locking abutment surface is radially fixed relative to the guide member and configured to engage the pin to prevent the needle cover from moving proximally away from the locked position.
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