Patent ID: 8199393
Filing Date: 2012-06-12
Classification: G02B

Abstract:
1. A scanner motor, comprising: a base plate supporting a whole portion of the scanner motor, with a circuit board being mounted on an upper surface of the base plate and a bearing holder being secured to a central portion of the base plate; a rotating shaft supporting the scanner motor vertically in such a way that the scanner motor is rotatable; a bearing rotatably fitted over an outer circumference of the rotating shaft; to the bearing holder for holding the bearing; a stator mounted to an outer circumference of the bearing holder to generate electricity; a rotor case rotatably fitted over and secured to an outer circumference of the rotating shaft so as to mount a polygon minor thereon; three protrusions protruding from an upper portion of the rotor case at regular intervals to stably support the polygon minor; and a concave part formed between the protrusions to absorb external stress.