摘要 |
An injection device comprising an outer housing inside which is located a medicament-holding barrel ( 9 ) with a needle ( 10 ) at one end thereof, at least part of the needle being moveable in and out of the outer housing, a plunger ( 8 ) moveable within the barrel, an inner housing ( 7 ) intermediate the outer housing ( 6 ) and the barrel and plunger and an energy source ( 1 ) in communication with said inner housing. The inner housing is moveable by the energy source between a first position in which the plunger and barrel are movable axially so as to move at least part of said needle out of the outer housing; a second position in which the plunger is movable axially into said barrel so as to expel medicament through the needle; and a third position in which the plunger and barrel are able to retract in order to retract the needle into the outer housing.
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