PROBLEM TO BE SOLVED: To provide a jet bath apparatus discharging diversified jet flows in a small-size and simple structure.SOLUTION: A jet nozzle has a stream introduction part and a chamber extending in the axial direction of a tubular body and formed inside the tubular body, wherein the stream introduction part has an upstream-side end part for introducing pressured bathtub water sent from a pressure device, and a downstream-side end communicated with the chamber, and the chamber has a channel cross section sudden expansion part provided in the axial upstream-side end and having the channel cross section suddenly expanded with respect to the downstream-side end of the stream introduction part, and a spout opened in the axial downstream-side end part. The channel of the channel introduction part is gradually narrowed from the upstream-side end part toward the downstream-side end part, a channel center line passing through the center of the channel cross section of the stream introduction part has a curvature and the downstream-side position of the channel center line is accorded with the axial center of the chamber.COPYRIGHT: (C)2009,JPO&INPIT【課題】小型且つ簡単な構造で、変化に富んだ噴流吐出を実現する噴流浴装置を提供する。【解決手段】噴流ノズルは、流水導入部と、筒体の軸方向に延在して筒体の内部に形成されたチャンバーとを有し、流水導入部は、加圧装置から送られる加圧浴槽水が導入される上流側端部と、チャンバーに連通する下流側端部とを有し、チャンバーは、軸方向の上流側端部に設けられ流水導入部の下流側端部に対して流路断面が急拡大された流路断面急拡大部と、軸方向の下流側端部に開口された噴出口とを有し、流水導入部の流路は上流側端部から下流側端部に向けて漸次細くなり、流水導入部の流路断面の中心を通る流路中心線は曲率を有し、流路中心線の下流端位置はチャンバーの軸中心に一致している。【選択図】図1
