Apparatus for informing a user of predetermined condition by vibration

摘要

An apparatus for informing a holder or user of the apparatus of a predetermined state by providing a vibratory sensation to the holder or user. The vibrations produced by the apparatus produces in a manner so as to prevent substantial movements of the apparatus even when left unattended. The apparatus includes a motor attached to a housing and a controller for actuating the motor to rotate a shaft. The controller actuates the motor to rotate the shaft in forward and reverse directions alternately at predetermined intervals in response to reception of an incoming signal.