PROBLEM TO BE SOLVED: To provide a puncture needle assembly, surely preventing a puncture needle from unwillingly moving a first position where a needle tip is projected from a housing to a second position where the needle tip is stored in the housing.SOLUTION: This puncture needle assembly 1 includes: a puncture needle 3 having the needle tip 311 a housing 2 supporting the puncture needle 3 to be movable to the first position where the needle tip 311 projects and to the second position where the needle tip 311 is stored a coil spring 4 installed in the housing 2 to energize the puncture needle 3 toward the proximal end a regulating member 5 installed in the housing 2 to take the regulating state of regulating the puncture needle 3 located at the first position from moving to the second position against the energizing force of the coil spring 4 and the release state of releasing the regulating state and allowing the puncture needle 3 located at the first position from moving to the second position and an operating member 6 installed in the housing 2 to be movable along its longitudinal direction and performing the operation of displacing the regulating member 5 from the regulating state to the release state.COPYRIGHT: (C)2012,JPO&INPIT【課題】針先がハウジングから突出する第1の位置から、針先がハウジング内に収納される第2に位置に不本意に穿刺針が移動するのを確実に防止することができる穿刺針組立体を提供すること。【解決手段】穿刺針組立体1は、針先311を有する穿刺針3と、針先311が突出する第1の位置と針先311が収納される第2の位置とに穿刺針3を移動可能に支持するハウジング2と、ハウジング2に設置され、穿刺針3を基端方向に付勢するコイルバネ4と、ハウジング2に設置され、コイルバネ4の付勢力に抗して、第1の位置にある穿刺針3の第2の位置への移動を規制する規制状態と、規制状態が解除され、第1の位置にある穿刺針3の第2の位置への移動を許可する解除状態とを取り得る規制部材5と、ハウジング2にその長手方向に沿って移動可能に設置され、この移動により、規制部材5を規制状態から解除状態に変位させる操作を行なう操作部材6とを備えている。【選択図】図2
