Patent ID: 6707193
Filing Date: 2004-03-16
Classification: B06B,H02K,Y10T

Abstract:
A miniature electric motor for generating vibration on which a vibrator is mounted on an output portion of a rotary shaft rotatably supported to a casing,wherein said output portion of said rotary shaft is formed into an irregular shape in cross-section other than a circular shape in cross-section, an engaging hole having a predetermined shape in cross-section, which corresponds to said irregular shape in cross-section of said output portion and which makes said vibrator to be kept under a relatively non-rotatable condition to said rotary shaft, is formed in said vibrator, and said output portion is engaged with said engaging hole and a tip end portion of said output portion projecting from said engaging hole to the outside is depressed so that a part of said tip end portion is plastically deformed radially outwardly, and said vibrator is positioned and held in the thrust direction to said output portion by said tip end portion and a stepped portion formed at an end portion of said flat surface portion toward said casing, whereby said vibrator is fixed to said rotary shaft.