DETENTION NEEDLE ASSEMBLY

To provide a novel detention needle assembly capable of preventing unintended depression operation of an operation member.SOLUTION: An inner needle 22 is inserted into an outer needle 16 arranged so as to protrude to a tip side of a housing 26, and when an operation member 28 provided to expose to an outer peripheral face 27 of the housing 26 is depression operated, the inner needle 22 is pulled from the outer needle 16 by an energization member 122 and is stored in the housing 26, in a detention needle assembly 10. In a feeding operation part 18 to which operation force for feeding the outer needle 16 to the tip side from the housing 26 is applied, there are provided lock parts 42, 118 for inhibiting movement of the operation member 28 to a depression direction, and by feeding of the outer needle 16 by the feeding operation part 18, inhibition of movement is released, and positioning mechanisms 42, 44, 100, 118 for positioning the feeding operation pat 18 to the operation member 28 in a circumferential direction of the housing 26.SELECTED DRAWING: Figure 3 【課題】意図しない操作部材の押下操作を防止することができる、新規な構造の留置針組立体を提供する。【解決手段】ハウジング２６の先端側に突出して配された外針１６に内針２２が挿通されており、ハウジング２６の外周面２７に露呈して設けられた操作部材２８を押下操作することで、内針２２が付勢部材１２２によって外針１６から引き抜かれてハウジング２６に収容される留置針組立体１０であって、外針１６をハウジング２６から先端側へ送り出す操作力が及ぼされる送出操作部１８において、操作部材２８の押下方向への移動を阻止し且つ送出操作部１８による外針１６の送り出しによってかかる移動の阻止が解除されるロック部４２，１１８が設けられている一方、送出操作部１８を操作部材２８に対してハウジング２６の周方向で位置決めする位置決め機構４２，４４，１００，１１８が設けられている。【選択図】図３