| 摘要 |
The invention provides a piston rod (1) configured to engage a housing (3) of a drug delivery device (2), wherein the piston rod (1) comprises an outer thread (1.1) that corresponds with an inner thread (3.1) of the housing (3), characterized by a support element (1.2) that is configured as a supplement thread section of the outer thread (1.1), - wherein the support element (1.2) comprises a lead-in (L1) for assembly of the drug delivery device (2) and - wherein the lead-in (L1) is distally spaced from another lead-in (L2) arranged on the distal outer thread end (1.1.1). The invention further provides a drug delivery device (2) comprising such a piston rod (1) and a method for assembling such a drug delivery device (2). |
