Operational unit for Kith itch

摘要

(57) Abstract Objective In sleeve section of key stem and housing dust andThe operation for Kith itch which can prevent the invasion of the liquid completely uni-tsuto is offered. Constitution kisute which is interposed in apex of housing 21With umbrella subordinate surface of top of mu and top face of housing 21 cylinderAs being able to give airtightness, it lies between condition elastic material 29,The bottom of housing 21 the rubber make which possesses contact breaker points pushing pressure section 28It closes with base lid 36.