Patent ID: 9245511
Filing Date: 2016-01-26
CPC Classification: G10H

Claim Text:
1. An ultrathin electromagnetic driver used in a string vibration sustaining device mounted on an electric guitar, wherein the string vibration sustaining device comprises: a rear pickup that detects a frequency of string vibration, and converts the detected frequency of the string vibration into an electrical signal; an amplifier that amplifies the converted electrical signal; and the ultrathin electromagnetic driver that converts the amplified electrical signal into a magnetic signal to excite strings; the ultrathin electromagnetic driver comprises two magnetic pole plates formed of a magnetic material, a rare earth magnet arranged in parallel with the strings to be positioned between the two magnetic pole plates, and a coil wound in a direction perpendicular to the strings around the rare earth magnet, the ultrathin electromagnetic driver is formed in an ultrathin shape to have an entire thickness equal to or smaller than 3 mm, and the ultrathin electromagnetic driver is arranged in a gap between a neck end portion and a front pickup of the electric guitar.