| abstract |
The present invention relates to a drug delivery device for selecting and dispensing several user variable doses of medicaments. The device includes a housing (10), a cartridge (170) containing a medicament, and a last dose protection mechanism that prevents a selected dose from exceeding the amount of medicament remaining in the cartridge (170). The last dose protection mechanism includes a first member (60), a second member (50) and a third member (100), the first member (60) being rotatable in a first direction during dose selection and during dose dispensing During rotation in the opposite direction, the second member (50) is connected to the first member (60) and coupled to the housing (10) such that the second member is relative to the first member when the first member (60) rotates (60) and housing (10) move and the third member (100) moves relative to the first and second members (50, 60) during dose dispensing. The abutment of the second and third members (50, 100) prevents an increase in the selected dose. |