摘要 |
An inhaler for delivery by inhalation of a medicament from the canister which is compressible to deliver a dose of medicament. The inhaler comprises a housing ( 1 ) for holding a canister ( 2 ) having a generally cylindrical body ( 3 ) with the cylindrical axis of the body ( 3 ) in predetermined direction and a loading mechanism for loading a resilient loading element ( 7 ) which is arranged, when loaded, to bias compression of the canister ( 2 ). The loading mechanism comprises a loading member ( 8 ) engaging the resilient loading element ( 7 ) and two contact members ( 9 ) movable relative to the housing ( 1 ) in a movement direction orthogonal to said predetermined direction and arranged to drive the loading member ( 8 ) to load the resilient loading element ( 7 ), through a cam arrangement between the contact member ( 8 ). The cam arrangement may allow for the ratio of the amount of driven movement of the loading member ( 8 ) to the amount of mount of the contact members ( 9 ) to be non-linear, preferably reducing over the driven movement to compensate for the increasing resistance by the resilient loading element. |