PROBLEM TO BE SOLVED: To provide an anti-free flow mechanism that changes a state of a transfusion tube from a closed state to a fluid feeding state when a door member is moved from an open position to a closed position.SOLUTION: An anti-free flow mechanism 200 comprises: a housing 101 having an accommodation part 130 capable of accommodating a transfusion tube 5 a door member 110 rotatably connected to the housing 101 a clip member 150 accommodated in the accommodation part 130 and capable of changing a state of the transfusion tube 5 between a closed state and an open state and a release member 117 which is formed on the accommodation part 130 side in the door member 110 and, when the door member 110 moves from an open position to a closed position, releases the closed state of the clip member 150 at a prescribed position between the open position and the closed position.SELECTED DRAWING: Figure 9COPYRIGHT: (C)2017,JPO&INPIT【課題】ドア部材が開位置から閉位置に移動された場合、輸液チューブを閉塞状態から送液状態に状態変化させるアンチフリーフロー機構を提供すること。【解決手段】アンチフリーフロー機構200は、輸液チューブ5を収容可能な収容部130を有する筐体101と、筐体101に回動可能に連結されるドア部材110と、収容部130に収容配置され、輸液チューブ5を閉状態と開状態とに状態変化可能なクリップ部材150と、ドア部材110における収容部130側に形成されドア部材110が開位置から閉位置に移動する場合、開位置と閉位置との間の所定位置においてクリップ部材150の閉状態を解除させる解除部材117と、を備える。【選択図】図9
