The present disclosure provides for a drive assembly for a drug delivery device, the drive assembly at least comprising: a housing (4)； a number sleeve (24) threadedly engaged with the housing (4) to be screwable relative to the housing (4), where the number sleeve (24) has inner and outer proximal sections； a dial link (25) rotatably fixed with the number sleeve (24) when the dial link (25) and number sleeve (24) are in a first axial arrangement relative to each other, the number sleeve (24) being rotatable relative to the dial link (25) when the dial link (25) and number sleeve (24) are in a second axial arrangement； a clutch component (26) connected to the inner proximal section of the number sleeve (24) through a plurality of flexible assembly fingers (73), the clutch component (26) being configured to engage the number sleeve (24) with the dial link (25) in the first axial arrangement of dial link (25) and number sleeve (24) and to disengage the number sleeve (24) from the dial link (25) in the second axial arrangement of dial link (25) and number sleeve (24). The drive assembly is characterized in that it provides means for preventing an access to the plurality of flexible assembly fingers (73) from the outer proximal section of the number sleeve (24) and/or the plurality of flexible assembly fingers (73) from flexing inwardly and disengaging from the connection with the inner proximal section of the number sleeve (24). Moreover, a drug delivery device with such a drive assembly is presented.La présente invention concerne un ensemble d'entraînement pour un dispositif de distribution de médicament, l'ensemble d'entraînement comprenant au moins : un boîtier (4) ； un manchon numérique (24) associé par filetage avec le boîtier (4) de manière à pouvoir être vissé par rapport au boîtier (4), où le manchon numérique (24) a des sections proximales interne et externe ； une liaison de cadran (25) fixée de façon rotative avec le manchon numérique (24) lorsque la liaison
