The present disclosure relates to a mechanism (5) for a drug delivery device (1), having a first and a second state, comprising an engagement preventing member (11), a blocking member (63) comprising a blocking feature (66), and an engagement element (67) which is engagable with the blocking member (63), wherein the blocking member (63) is configured to engage with the engagement element (67) in a non-linear movement, thereby moving the blocking feature (66) is moved from a first position to a second position in an arc shaped movement, wherein, in the first state of the mechanism (5), the engagement preventing member (11) is configured to prevent an engagement of the blocking member (68) with the engagement element (67) by covering the engagement element (67), and wherein, in the second state of the mechanism (5), the engagement element (67) is free from the engagement preventing member (11) such that the blocking member (63) is enabled to engage with the engagement element (67).本發明係有關一用於一藥物傳輸裝置(1)之機構(5),其具有一第一及一第二狀態,其包含一接合防止構件(11),一阻絕構件(63),其包含一阻絕特徵(66),及一接合元件(67),其可接合於阻絕構件(63),其中阻絕構件(63)係組構以一非線性運動接合於接合元件(67),藉此移動阻絕特徵(66)以一弧形運動從一第一位置被移動至一第二位置,其中在機構(5)的第一狀態中,接合防止構件(11)係組構以藉由覆蓋住接合元件(67)以防止阻絕構件(68)接合於接合元件(67),且其中在機構(5)的第二狀態中,接合元件(67)係脫離接合防止構件(11),俾使阻絕構件(63)能夠接合於接合元件(67)。11‧‧‧接合防止構件13‧‧‧第一可旋轉構件18‧‧‧第二可旋轉構件30‧‧‧第一銷針39‧‧‧互動構件41‧‧‧第二機構42‧‧‧第一可旋轉構件的第一表面63‧‧‧阻絕構件65‧‧‧接合特徵66‧‧‧阻絕特徵69‧‧‧第一拉張構件70‧‧‧第二拉張構件
