| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent a jet button of a jetting device from being clogged when using it. SOLUTION: A nozzle storing hole 17 opened to the peripheral surface of a button body 10 is provided in its diameter direction. A nozzle member 20 having a cylindrical shape with a top part 30 and a jet orifice 31 at the center of the top part is fitted in the nozzle storing hole 17 with the top part side turned outward. An exhaust channel 60 in communication with the jet orifice 31 is formed and a center post 50 is stored in the cylinder part 40 of the nozzle member. Mat treatment, fronting on the exhaust channel 60, is applied to either one of the outer periphery of the end surface 51 of the center post and the inner surface of the top part 30 of the nozzle member 20 facing the periphery, or to both of them. For instance, a ring-shaped protuberance 32 having the jet orifice 31 as a center is formed on the inner surface of the top part 30, and the mat treatment is applied to its top surface.</p> |
