The invention relates to a drug delivery device (3) for mechanically dispensing a dose of a medicament, the drug delivery device (3) comprises a ratchet mechanism (5) adapted to emit an audible and/or tactile feedback during dispensing the dose of medicament, wherein - the ratchet mechanism (5) includes a flexible arm (1.2) and a toothed profile (2.2), - a free end of the flexible arm (1.2) is configured to engage with the toothed profile (2.2) and to perform a relative rotational movement thereto during dispensing the dose of medicament, thereby generating the audible and/or tactile feedback, and - the flexible arm (1.2) extends in a plane parallel to a rotational axis (R) of the flexible arm (1.2).本發明涉及一種用於以機械方式分配一劑量的藥劑的藥物輸送裝置(3),所述藥物輸送裝置(3)包括棘輪機構(5),所述棘輪機構(5)適於在分配該劑量的藥劑期間發出可聽和/或可觸知反饋,其中,- 所述棘輪機構(5)包括撓性臂(1.2)和齒廓(2.2),- 所述撓性臂(1.2)的自由端被構造成與所述齒廓(2.2)相接合並且被構造成在分配該劑量的藥劑期間相對於所述自由端執行相對旋轉運動,由此產生所述可聽和/或可觸知反饋,並且- 所述撓性臂(1.2)在平行於所述撓性臂(1.2)的旋轉軸線(R)的平面內延伸。1‧‧‧離合器元件1.1‧‧‧離合器段1.1.1‧‧‧凹槽1.2‧‧‧撓性臂1.2.1‧‧‧近側臂段1.2.2‧‧‧遠側臂段1.2.3‧‧‧突起1.3‧‧‧離合器盤1.3.1‧‧‧突起R‧‧‧旋轉軸線R1‧‧‧第一旋轉方向R2‧‧‧第二旋轉方向P‧‧‧近側方向
