WATER SAVING PIECE AND ITS MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a water saving piece capable of preventing reduction of water pressure even if amount of water discharge is reduced, providing sense of volume in water discharge visually to reduce user's sense of incongruity, and preventing occurrence of plugging-up and to provide a method having a simple manufacturing process for reducing manufacturing cost and manufacturing the water saving piece corresponding to different water pressure.;SOLUTION: In this water saving piece composed of a main body, a flow-in port 2 for receiving water from the upstream side of a water pipe, a flow passage 3 in which water flows in the main body, and a discharge port 4 for discharging water, the flow passage is a single flow passage in uniaxial direction, its diameter is stepwise reduced in the direction of advance of water from the upstream side to the downstream side, and an angle at each step crossing the direction of advance of water is round. Consequently, reduction of pressure is suppressed even if amount of water discharge is reduced, and rotation force in the lateral direction is applied to water stream to give sense of volume to water discharge. Manufacturing cost is greatly reduced because this water saving piece can be manufactured in a process in uniaxial direction.;COPYRIGHT: (C)2006,JPO&NCIPI