PROBLEM TO BE SOLVED: To provide a newly-structured valved needle assembly capable of achieving compatibility between an improvement in easiness of push-opening of an elastic valve body and low flow resistance in an internal flow passage.SOLUTION: In a valved needle assembly 10, a cylindrical part 16, which has an inner hole 108 constituting an internal flow passage 20, and an elastic valve body 14 are provided in a needle hub 18 that is fixed on the base end side of a hollow needle 12. The elastic valve body 14 is pushed open by a protruding tip surface 127 of the cylindrical part 16. An inner peripheral surface 126 on the protruding tip side of the cylindrical part 16 is formed in an expanded shape, the inside diameter dimension of which becomes larger toward the side of a protruding base end.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2020,JPO&INPIT【課題】弾性弁体の押し開き易さの向上と内部流路における小さい流動抵抗とを両立して達成することのできる、新規な構造の弁付き針組立体を提供する。【解決手段】中空針１２の基端側に固定された針ハブ１８の内部に、内部流路２０を構成する内孔１０８を備える筒状部１６と弾性弁体１４とが設けられており、弾性弁体１４が筒状部１６の突出先端面１２７によって押し開かれる弁付き針組立体１０において、筒状部１６における突出先端側の内周面１２６が、突出基端側に向かって内径寸法が大きくなる拡開形状とされている。【選択図】図３
