A drive assembly for a drug delivery device includes a housing； a number sleeve threadedly engaged with the housing； a dial link rotatably fixed with the number sleeve in a first axial arrangement relative to each other, the number sleeve being rotatable relative to the dial link in a second axial arrangement； a clutch component connected to an inner proximal section of the number sleeve through multiple flexible assembly fingers. The clutch component can engage the number sleeve with the dial link in the first axial arrangement and disengage the number sleeve from the dial link in the second axial arrangement. The drive assembly includes means for preventing an access to the flexible assembly fingers from the outer proximal section of the number sleeve and/or the flexible assembly fingers from flexing inwardly and disengaging from the connection with the inner proximal section.
