PROBLEM TO BE SOLVED: To provide steady rotary jet by rotating a rotary nozzle body at a constant rotating speed stably without depending on the construction situation such as the size of a bathtub, the length of piping, a piping method, and the bend condition of piping.SOLUTION: A nozzle device for a jet bath includes a rotary nozzle body 6 in which a plurality of jet holes 17 that penetrate in the axial direction are installed at equal intervals in the circumferential direction in positions a predetermined distance away from the axial center in the radial direction, and an orifice 3 installed upstream of the rotary nozzle body 6 concentrically with the rotary nozzle body 6, in which water stream is gushed from the orifice 3 toward the jet holes 17. Inside the orifice 3, a plurality of flow regulating plates extending from the inside wall of the orifice toward the center are installed at equal intervals in a circumferential direction.COPYRIGHT: (C)2013,JPO&INPIT【課題】浴槽の大きさ、配管の長さ、配管方法、配管の曲げ具合などの施工状況によらず、回転ノズル本体を安定的に同等の回転数で回転させ、安定した回転噴流を提供する。【解決手段】軸方向に貫通する複数の噴流孔17が軸中心から径方向に所定距離離れた位置に周方向に等間隔で設けられた回転ノズル本体6と、該回転ノズル本体6の上流側に回転ノズル本体6に対して同心状に設けられたオリフィス3とを備え、該オリフィス3から噴流孔17に向けて水流が噴出される噴流風呂用ノズル装置において、オリフィス3の内部に、オリフィスの内周壁から中心に向かって延びる複数の整流板を、周方向に等間隔で設ける。【選択図】図2
