A DRUG DELIVERY DEVICE

摘要

A drug delivery device comprising; a housing; a plurality of contacts (212); and a cylindrical member (406) configured to be rotatably supported inside the housing, wherein the outer surface of the cylindrical member is provided with a plurality of tracks together forming an encoder, each track comprising conductive segments and nonconductive segments, and wherein the cylindrical member is supported in the housing such that each track is engaged by a respective one of the plurality of contacts.