PROBLEM TO BE SOLVED: To provide a discharge tap that has no risk of a reverse flow of a content even if the tip thereof contaminates with bacteria or the like, and also has a simple configuration for the assembling of a plurality of members, and can be easily assembled and firmly maintain the structure after assembled.SOLUTION: The discharge tap includes: a nozzle base body A1 whose outer peripheral lower part is liquid-tightly fitted and mounted to an inner periphery of a bottle neck part 41 of a container body B having a squeezable body, having a closed-top cylindrical shape with an opening on the bottom, and having a discharge opening 18 on the top and a valve member A2 formed of a material rich in flexibility and resilience and fitted and secured in the nozzle base body, and defining a liquid flow path p1 from the interior of the container body B to the discharge opening 18 and also defining an air flow path p2 from an external air introduction hole 17 formed by piercing a peripheral wall 10 of the nozzle base body. A discharge valve v1 for one-way communication to the discharge opening from the interior of the container body B is provided in the middle in the liquid flow path, and a suction valve v2 for one-way communication to the interior of the container body B from the outside is provided in the middle in the air flow path.COPYRIGHT: (C)2013,JPO&INPIT【課題】先端にたとえ雑菌等が付着した場合でも容器体内への逆流の虞がなく、また、複数部材の組み付け構成が単純であるとともに組み付けが容易であり、組み付け後のしっかりとした構造維持が可能な吐出栓を提案する。【解決手段】圧搾可能な胴部を備える容器体Bの口頸部41内周に外周下部を液密に嵌合させて装着するとともに、下端を開口した有頂筒状をなし、頂部に吐出口18を開口したノズル基体A1と、ノズル基体内に嵌着固定した柔軟で弾力性に富む材質で構成され、容器体B内から吐出口18に至る通液路p1を画成するとともに、ノズル基体の周壁10に穿設した外気導入孔17から容器体B内へ至る通気路p2を画成した弁部材A2とを備え、通液路途中に容器体B内から吐出口へ一方的に連通する吐出弁v1を、通気路途中に外部から容器体B内へ一方的に連通する吸気弁v2を、それぞれ設けている。【選択図】図4
