Problem to be solved: to improve the reliability of the operation in which the shield returns from the compression state to the initial state.The shield 50 comprises an outer peripheral wall 55 which can be compressed in the longitudinal direction of the male member 11 and a head 51 provided at one end of the outer peripheral wall 55. The head 51 has an inner cavity 52 into which the male member 11 is inserted. On the inner peripheral surface of the lumen 52 of the head 51, there are provided a first seal portion 52A and a second seal portion 52b closely connected to the outer peripheral surface of the male member 11, and a recesses 52C retreated from the sealing portions 52A and 52b.In the initial state where the outer peripheral wall 55 is not compressed, the concave portion 52C is opposed to the lateral hole 13 of the male member 11, and the first seal part 52A is brought into close contact with the outer peripheral surface of the male member 11 at the distal end side of the lateral hole 13, and the second seal part 52b is located on the proximal end side of the male member 11 than the lateral hole Stick to the surface. When the outer peripheral wall 55 is compressed and compressed, the male member 13 projects from the head 51 so that the lateral hole 13 is exposed outside the shield 50.Selection diagram【課題】シールドが圧縮状態から初期状態へ復帰する動作の信頼性を向上させる。【解決手段】シールド50は、オス部材11の長手方向に圧縮可能な外周壁55と、外周壁55の一端に設けられた頭部51とを備える。頭部51は、オス部材11が挿入される内腔52を備える。頭部51の内腔52の内周面には、オス部材11の外周面に密着する第1シール部52a及び第2シール部52bと、シール部52a,52bより後退した凹部52cとが設けられている。外周壁55が圧縮変形していない初期状態では、凹部52cがオス部材11の横孔13に対向し、第1シール部52aが横孔13よりも先端側においてオス部材11の外周面に密着し、第2シール部52bが横孔13よりも基端側においてオス部材11の外周面に密着する。外周壁55が圧縮変形した圧縮状態では、横孔13がシールド50外に露出されるようにオス部材13が頭部51から突出する。【選択図】図1C
