A DRUG DELIVERY DEVICE

摘要

A drug delivery device comprising: ° a housing (404); ° a plurality of contacts (212); ° a rod (414) disposed within the housing; and ° an encoded member (410) configured: ° to be rotatably supported inside the housing; ° to engage with the rod and to be rotatable with respect to the rod; and ° to be axially constrained with respect to the housing such that axial advancement of the rod in a first direction relative to the housing causes rotation of the encoded member, wherein the outer surface of the encoded member is provided with a plurality of tracks together forming an encoder, each track comprising conductive segments and non-conductive segments and wherein the encoded member is supported in the housing such that each track is engaged by a respective one of the plurality of contacts.