Silent warning vibration generator for portable equipment

摘要

A vibration generator in a pager or massage device for giving vibration to the user including a coil fixed to a base and a movable member vibratably supported on the base. The movable member has inner and outer yokes defining therebetween a magnet gap in which the coil is inserted and a magnet for causing magnetic flux in the magnetic gap. A parallel four-bar linkage structure with a cantilevered leaf spring, a turnover leaf spring, or two diaphragm springs supports the movable member on the base.