The invention refers to an interlock mechanism for restricting a rotational movement of a rotatable component (1) of a drug delivery device (10) and to a method for controlling the rotational movement of the rotatable component (1). The method comprises the steps of:- translatively moving a trigger arm (6) engaged with a protrusion (7) of a latch arm (5) from an initial position for pivoting the latch arm (5) out of one of at least one catches (3) provided in a cam profile of the rotatable component (1) thus allowing the rotatable component (1), biased by an energy source, to rotate- pivoting the trigger arm (5) by one of at least one cams (4) provided in the cam profile during the rotation (R) of the rotatable component (1) whereby the trigger arm (6) is disengaged from the protrusion (7) thus allowing the latch arm (5) to re-engage with one of the catches (3) to stop the rotational movement (R) and whereby an interlock means (8) catches and holds the trigger arm (6) in its translatively moved and pivoted position until the interlock means (8) is released by a reset means- translatively moving the trigger arm (6) back into the initial position once the interlock means (8) is released thereby allowing it to pivot back and re-engage with the protrusion (7).本發明係有關一種用於限制藥物輸送裝置(10)之可旋轉組件(1)之旋轉運動的互鎖機構以及用於控制該可旋轉組件(1)之旋轉運動的方法。該方法包含下列步驟:- 由一初始位置平移與一銷臂(5)之一隆起(7)接合的一觸發臂(6)以樞轉該銷臂(5)離開設於該可旋轉組件(1)之一凸輪輪廓的至少一掣子(3)之其中之一,從而允許被一能源偏壓的該可旋轉組件(1)旋轉;- 在該可旋轉組件(1)的旋轉(R)期間,用設於該凸輪輪廓的至少一凸輪(4)之其中之一樞轉該觸發臂(5),藉此使該觸發臂(6)脫離該隆起(7),從而允許該銷臂(5)與該等掣子(3)之其中之一重新接合以制止該旋轉運動(R),以及藉一互鎖構件(8)可抓住及夾住該觸發臂(6)於其平移及樞轉後的位置直到該互鎖構件(8)被一重設構件釋放;- 在該互鎖構件(8)釋放後使該觸發臂(6)平移回到該初始位置,藉此允許它反向樞轉並且與該隆起(7)重新接合。1...可旋轉組件2...縱軸3...掣子4...凸輪5...銷臂6...觸發臂7...隆起8...互鎖構件9...觸發按鈕R...旋轉
