Patent ID: 7686786

Claim:
A dial-down mechanism for an injection device comprising a torsion spring ( 18 ) for assisting injection of a dose of medicament from the injection device, the dial-down mechanism comprising dial-up cam ( 15 ) arranged to receive and engage with a dial-up key ( 11 ), wherein the dial-up cam ( 15 ) and the dial-up key ( 11 ) are adapted to, upon rotation of a dose setting member in a first direction, cooperate to strain the torsion spring ( 18 ) of the injection device, and a dial-down cam ( 16 ) arranged to receive and engage with a dial-down key ( 12 ), wherein the dial-down cam ( 16 ) and the dial-down key ( 12 ) are adapted to, upon rotation of the dose setting member in a second direction, cooperate to release the torsion spring ( 18 ) of the injection device, the second rotation direction being opposite to the first rotation direction, wherein the dial-up and dial-down cams form part of regions of the same track, further comprising an arm wherein the dial-up and dial-down keys are both located on the same arm, said keys being adapted to engage and cooperate with dial-up and dial-down cams of the same track.