Patent ID: 9313579
Filing Date: 2016-04-12
CPC Classification: H04R

Claim Text:
1. A sound generator apparatus for a vehicle comprising: a housing and an elastic member arranged at a lower portion of the housing; a driving part including an internal yoke and a magnet, wherein the internal yoke and the magnet are inserted into the housing and disposed on a portion of the elastic member and are configured to be slid up and down in the housing wherein the portion of the elastic member is spaced from the lower portion of the housing; a bobbin, an upper end of which is fixed to an inside upper portion of the housing, extended in a downward direction with wrapping the driving part, wherein a coil is wound along a circumference of the bobbin; and an external yoke fixed to the housing in a cylinder shape wrapping the coil and an outside of the internal yoke therein, wherein the internal yoke includes an upper yoke and a lower yoke, each of which is combined to the magnet disposed between the upper yoke and the lower yoke, and wherein a distance between an external surface of the lower yoke and an internal surface of the external yoke opposite to the external surface of the lower yoke is less than a distance between the external surface of the upper yoke and the internal surface of the bobbin.