Patent ID: 7038335
Filing Date: 2006-05-02
Classification: B06B,H02K

Abstract:
1. A vertical vibrator, comprising: a casing having a space of a predetermined size defined therein; a magnetic field part located in the space of the casing, the magnetic field part including a yoke, and a magnet vertically magnetized and fixed to a closed inner surface of the yoke for generating a magnetic field of a predetermined intensity; a spring member fixed at one end to the casing and at the other end to the magnetic field part; a vibration part having a weight integrally mounted to the magnetic field part and vertically vibrating together with the magnetic field part via the spring member; a vibration coil located at a position directly below the magnetic field part for generating an electric field of a predetermined intensity upon application of power; and a magnetic fluid applied to an upper surface of the spring member corresponding to the magnet so as to be fixed in position by a magnetic flux leaked from the magnet.